作者： Liu, Jingbin;Yang, Wentao;Zhou, Hang;Zia-ur-Rehman, Muhammad;Salam, Muhammad;...

期刊： Ecotoxicology and Environmental Safety,2024年285:117094 ISSN：0147-6513

通讯作者： Yang, WT

作者机构： [Yang, Wentao; Yang, WT; Chen, Yonglin; Yang, Liyu; Wu, Pan; Liu, Jingbin] Guizhou Univ, Coll Resources & Environm Engn, Key Lab Karst Georesources & Environm, Minist Educ, Guiyang 550025, Peoples R China.;[Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Zia-ur-Rehman, Muhammad] Univ Agr Faisalabad, Fac Agr, Faisalabad, Pakistan.;[Salam, Muhammad] Chongqing Univ, Key Lab Ecoenvironm Three Gorges Reg, Minist Educ, Chongqing 400044, Peoples R China.;[Ouyang, Linnan] Chinese Acad Forestry, Res Inst Fast Growing Trees, State Key Lab Efficient Prod Forest Resources, Zhanjiang 524022, Peoples R China.

通讯机构： [Yang, WT ] G;Guizhou Univ, Coll Resources & Environm Engn, Key Lab Karst Georesources & Environm, Minist Educ, Guiyang 550025, Peoples R China.

关键词： Cadmium;Dissolved organic matter;Nutrients;Organic fertilizer;Rhizosphere;Rice

摘要： The problem of paddy Cadmium (Cd) contamination is currently the focus of global research. Earlier researches have confirmed that utilization of organic fertilizers regulates Cd chemical fraction distribution by increases organic bound Cd. However, environmental behaviours of organic fertilizers in paddy are still lack exploration. Here, we critical reviewed previous publications and proposed a novel research concept to help us better understand it. Three potential impact pathways of utilization of organic fertilizers on the bioavailability of Cd are presented: (i) use of organic fertilizers changes soil physicochemical properties, which directly affects Cd bioavailability by changing chemical form of Cd(II); (ii) use of organic fertilizers increases soil nutrient content, which indirectly regulates Cd supply and bioaccumulation through ion adsorption and competition for ion-transport channels between nutrients and Cd; and (iii) use of organic fertilizers increases activity of microorganisms and efflux of rice root exudates, which indirectly affects Cd bioavailability of through complexation and sequestration of these organic materials with Cd. Meanwhile, dissolved organic matter (DOM) in the rhizosphere of rice is believed to be the key to revealing the effects of organic fertilizers on Cd. DOM is capable of adsorption and complexation-chelation reactions with Cd and the fractionation of Cd(II) is regulated by DOM. Molecular mass, chemical composition, major functional groups and reaction sequence of DOM determine the formation and solubilization of DOM-Cd complexes.

语种： 英文

作者： Hu, Liqiong;Zeng, Min*;Lei, Ming*;Liao, Bohan;Zhou, Hang

期刊： WATER AIR AND SOIL POLLUTION,2020年231(9):1-11 ISSN：0049-6979

通讯作者： Zeng, Min;Lei, Ming

作者机构： [Hu, Liqiong] Minist Ecol & Environm MEE, South China Inst Environm Sci, Guangzhou 510655, Peoples R China.;[Liao, Bohan; Zeng, Min; Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Lei, Ming] Dongguan Dongshi New Energy Co Ltd, Dongguan 523160, Guangdong, Peoples R China.

通讯机构： [Zeng, Min] C;[Lei, Ming] D;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;Dongguan Dongshi New Energy Co Ltd, Dongguan 523160, Guangdong, Peoples R China.

关键词： Zero-valent iron;Rice;Arsenic species;Iron plaque;Phosphorus

摘要： AbstractAn outdoor pot experiment was conducted to study the control effects of zero-valent iron (Fe0) on arsenic (As) uptake by rice (Oryza sativa L.) and its relationship with iron (Fe), As, and phosphorus (P) in soil and Fe plaque. The results showed that Fe0 reduced total and inorganic As in root, husk, and grain but had no significant effect in straw, and almost all contents of As species in rice plant were decreased by Fe0. Total As contents in root, husk, and grain were decreased (54.8%, 39.9%, 30.1%), while reductions of inorganic As were 59.2%, 30.8%, and 30.3%, respectively. The inorganic As in all issues of rice plant was dominated and higher than 70% of total As. The analysis showed that the main mechanisms of Fe0 on reduction of As in rice were (i) Fe0 stabilized the active As in soil, (ii) Fe0 increased the quantity of Fe plaque that hindered the transport of arsenic in soil to rice plant, and (iii) phosphorus adsorbed on the Fe plaque reduced As into rice root by the competitive mechanism between phosphorus and arsenic.Graphical abstract

语种： 英文

作者： 杨文俊;辜娇峰;周航;黄芳;王诗龙;...

期刊： 水土保持学报,2019年33(4):321-328 ISSN：1009-2242

作者机构： 中南林业科技大学环境科学与工程学院,长沙,410004;中南林业科技大学环境科学与工程学院,长沙 410004;稻米品质安全控制湖南省工程实验室,长沙 410004;[张竞颐; 周航; 龙坚; 杨文俊; 黄芳; 廖柏寒; 袁腾跃; 王诗龙; 辜娇峰] 中南林业科技大学

关键词： 淋洗;重金属;动力学模型;农田土壤

摘要： 为分析不同淋洗剂在不同淋洗条件下对重金属淋洗效果的影响,采用振荡淋洗法对比研究4种淋洗剂(柠檬酸(CA)、酒石酸(TA)、乙二胺四乙酸二钠盐(EDTA)和氨三乙酸三钠盐(NTA))不同浓度、淋洗时间、pH和固液比对重金属复合污染农田土壤中Pb、Cd、Cu和Zn的淋洗效果及单因素最佳淋洗条件下土壤淋洗前后重金属不同形态含量的变化。结果表明,CA和TA的最佳淋洗浓度为0.3mol/L,EDTA和NTA为0.05 mol/L;CA和NTA的最佳淋洗时间为480 min,EDTA和TA为720 min;4种淋洗剂的最佳淋洗pH均为3,最佳固液比均为1∶20。单因素最佳淋洗条件下,EDTA对土壤重金属去除效果最佳,对Pb、Cd、Zn和Cu的去除率分别为67.4%,61.0%,13.8%和76.0%;NTA效果次之,去除率分别为4 1.6%, 42.4%,9.9%和54.3%。土壤重金属去除率随淋洗剂pH的降低而升高,随固液比的增加而增加,随淋洗剂CA与TA浓度增大而增大。淋洗剂对土壤重金属的解吸动力学曲线符合准二级动力学模型,解吸过程为化学解吸,且解吸反应速率受土壤重金属含量与淋洗剂浓度控制。土壤重金属在淋洗剂作用下的解吸速率为Cd>Pb≈Zn≈Cu。EDTA和NTA淋洗显著降低土壤中Pb、Cd、Zn和Cu铁锰氧化态和有机结合态的含量,CA和TA显著降低Pb、Cd、Zn和Cu铁锰氧化态的含量。淋洗剂对重金属的去除效率为EDTA>NTA>CA>TA。

语种： 中文

作者： 蒋凯;邓潇;周航;龙坚;李欣阳;...

期刊： 环境科学,2019年40(7):3324-3330 ISSN：0250-3301

通讯作者： Peng, Pei-Qin(pqpeng123@sina.com)

作者机构： [蒋凯; 邓潇; 周航; 龙坚; 李欣阳; 董霞; 侯红波; 彭佩钦; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha;[王树兵] Agricultural Integrated Service Center of Changsha County, Huangxing Town, Changsha;410100, China

通讯机构： College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 稻田土壤;Cd污染;大气沉降;水稻;Cd平衡

摘要： 运用大田定位试验的方法,研究了典型稻田系统Cd污染发展趋势.于2015-11 ~ 2018-11逐月采集大气沉降及灌溉水样,同时多次采集肥料、土壤及水稻样,监测分析样品中Cd含量,研究湘中典型稻田系统Cd输入输出平衡情况.结果表明,稻田系统Cd通过灌溉水、大气沉降和肥料等途径输入,年均输入量为8.735 g·(hm~2·a) ~(- 1),其中大气沉降为主要来源,占总输入的69.15% ~ 82.04%,平均为76.61%,其次是灌溉水占12.62% ~ 23.66%,平均为16.94%,肥料占5.34% ~ 7.19%,平均为6.45%;稻田系统Cd通过地表径流、土壤下渗和水稻地上部分收获途径输出,年均输出量为7.093 g·(hm~2·a) ~(- 1),水稻地上部分收获占总输出的85.27% ~ 95.02%,平均为89.69%,其次是地表径流4.57% ~ 13.96%,平均为9.41%,土壤下渗输出的Cd最少,为0.41% ~ 1.51%,平均0.90%.结果表明,研究区稻田系统Cd为净输入,土壤Cd污染形势仍在加剧.稻草还田与稻草移除将对土壤Cd平衡产生重要影响,稻草移除可以减缓土壤Cd污染发展趋势.

语种： 中文

作者： 蒋凯;邓潇;周航;龙坚;李欣阳;...

期刊： 农业现代化研究,2019年40(3):518-526 ISSN：1000-0275

作者机构： 中南林业科技大学环境科学与工程学院;[刘文辉] 宁乡市双江口镇农业综合服务中心;[周航; 龙坚; 蒋凯; 彭佩钦; 侯红波; 廖柏寒; 董霞; 李欣阳; 邓潇] 中南林业科技大学

关键词： 灌溉水;湿地植物;人工湿地系统;稻田;米Cd

摘要： 为拦截灌溉水Cd,设计实施了水平潜流与表面流两种工艺组合的植物塘人工湿地系统,在水稻生育期净化处理灌溉水,结合田间水稻种植小区试验,于2017年1月至2018年12月逐月采集水样,同时多次采集水稻和土壤样品,监测分析样品Cd 含量,探讨人工湿地系统对灌溉水中Cd 的净化效率及对米Cd 累积的影响。结果表明:连续两年监测,人工湿地系统进水Cd 浓度范围为0.034~0.644μg/L,平均浓度为0.232μg/L,经过植物塘人工湿地系统处理后出水Cd 浓度范围为0.001~0.189μg/L,平均浓度为0.059μg/L。一级、二级和三级人工湿地系统对灌溉水中Cd 的去除率分别为50.21%、14.06% 和7.81%,人工湿地系统总去除率达72.06%;与未净化灌溉水相比,经人工湿地系统净化处理后灌溉的水稻糙米Cd 含量下降了10.50%~24.51%。研究表明,植物塘人工湿地系统能有效拦截去除灌溉水中的Cd,减少该途径对稻田土壤Cd 输入通量,并降低糙米中Cd累积量。本结果可为典型稻田重金属污染灌溉水的净化及湿地植物的选择、减少稻田重金属输入和粮食安全生产提供理论依据和参考。

语种： 中文

作者： Gu, Jiao-feng;Zhou, Hang*;Tang, Hui-ling;Yang, Wen-tao;Zeng, Min;...

期刊： Ecotoxicology and Environmental Safety,2019年171:451-459 ISSN：0147-6513

通讯作者： Zhou, Hang

作者机构： [Yang, Wen-tao; Liu, Zhi-ming; Liao, Bo-han; Peng, Pei-qin; Tang, Hui-ling; Zeng, Min; Gu, Jiao-feng; Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Liao, Bo-han; Peng, Pei-qin; Gu, Jiao-feng; Zhou, Hang] Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.;[Liu, Zhi-ming] Eastern New Mexico Univ, Dept Biol, Portales, NM 88130 USA.

通讯机构： [Zhou, Hang] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Accumulation;Arsenic;Cadmium;In situ remediation;Rice;Soil

摘要： Rice (Oryza sativa L.) planted in cadmium (Cd)- and arsenic (As)-contaminated soil is considered the main source of dietary Cd and As intake for humans in Southeast Asia and thereby poses a threat to human health. Minimizing the transfer of these pollutants to rice grain is an urgent task for environmental researchers. The main objective of this study was to investigate the effects and the mechanisms of a combined amendment (hydroxyapatite + zeolite + biochar, HZB) on decreasing Cd and As accumulation in rice. In situ remediation and aqueous solution adsorption experiments were conducted. The results showed that after application of HZB, Cd and As concentrations of the exchangeable fraction and TCLP extraction in soil decreased with the growth of rice plants. Cd concentrations in rice tissues were decreased at the tillering, filling and maturing stages after in situ remediation, while As concentrations in rice tissues were decreased only at the maturing stage. When 8 kg·plot −1 (9000 kg ha −1 ) HZB was applied, concentrations of Cd and inorganic As in brown rice were decreased to 0.18 and 0.16 mg kg −1 , respectively, lower than the levels permissible for grain in China, i.e., 0.2 mg kg −1 . Application of HZB reduced Cd accumulation in rice tissues, and the suppression of Cd accumulation was significantly greater than that of As. Furthermore, HZB significantly increased rice grain yield. An aqueous solution adsorption experiment demonstrated that HZB could adsorb and covalently bind Cd and As (V) via -OH, -COOH, -Si-O-Si and CO 3 2- groups to produce carboxylates, silicates and carbonates, thereby promoting in situ immobilization of Cd and As in soil solution. © 2019 Elsevier Inc.

语种： 英文

作者： Tian, Tao;Zhou, Hang*;Gu, Jiaofeng*;Jia, Runyu;Li, Hongcheng;...

期刊： Plant and Soil,2019年440(1-2):327-339 ISSN：0032-079X

通讯作者： Zhou, Hang;Gu, Jiaofeng

作者机构： [Wang, Qianqian; Tian, Tao; Liao, Bohan; Jia, Runyu; Gu, Jiaofeng; Zeng, Min; Li, Hongcheng; Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Tian, Tao] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.;[Wang, Qianqian; Liao, Bohan; Jia, Runyu; Zhou, Hang; Gu, Jiaofeng; Li, Hongcheng] Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Zhou, H; Gu, JF] H;Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.

关键词： Water regimes;Cadmium;Rice (Oryza sativa L.);Growth stages;Soil Eh

摘要： Background and aims: Cadmium (Cd) is a ubiquitous environmental pollutant, and rice (Oryza sativa L.) is the main staple food in China. Water regimes are promising, controllable, and environment-friendly agricultural measures for remediation Cd contaminated soil. The optimum water regime for ensuring high rice yield with low Cd contents in brown rice was investigated. Methods: A pot experiment was conducted to study the effects of Cd migration and accumulation from paddy soil to rice plants under four water regimes with three growth stages of two rice cultivars, ‘Xiangwanxian 12’ (X12) and ‘Weiyou 46’ (W46) grown in a polluted soil with 5 mg kg−1 of Cd. The relationship between Cd accumulation amounts in rice plant and soil Eh was also investigated. The four regimes were moisture throughout growth (M), moisture before the filling stage and flooding after filling (M-F), flooding before filling and moisture after filling (F-M), and continual flooding (F). Results: Water regimes effectively reduced Cd accumulation in rice at the three growth stages, whereas the filling stage was suggested to be as the key stage for interventions to prevent Cd transport and accumulation. Compared with M, the M-F, F-M, and F regimes significantly reduced Cd contents of rice tissues (root, stem, husk, and brown rice) at the maturity stage. Under the M, F-M, M-F, and F regimes, Cd contents were 2.17, 2.10, 0.21, 0.06 mg kg−1 in X12 brown rice and 3.27, 0.47, 0.19, 0.10 mg kg−1 in W46 brown rice, respectively. Importantly, Cd contents of brown rice of X12 (0.06 mg kg−1 under regime F) and W46 (0.19 mg kg−1 under regime M-F and 0.10 mg kg−1 under regime F) did not exceed China’s food safety standard of 0.20 mg kg−1 (GB 2762–2017). Moreover, there were significant positive exponential relationships between soil Eh and Cd accumulation amounts in belowground and aboveground parts of rice. Conclusions: The M-F regime (W46) and F regime (X12) could ensure high rice yield with low Cd contents in brown rice and could be recommended as the irrigation management in rice production. Simultaneously, keeping soil Eh under 50 mV is also necessary after the rice filling stage. © 2019, Springer Nature Switzerland AG.

语种： 英文

作者： 徐珺;曾敏;王光军;周航;杨文弢;...

期刊： 环境科学学报,2018年38(5):2008-2013 ISSN：0253-2468

通讯作者： Zeng, M.

作者机构： [徐珺; 王光军] College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, 410004, China;[Zeng M.; 周航; 杨文弢; 辜娇峰; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China

通讯机构： College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 组配改良剂;镉砷复合污染;稻田土壤;稳定化

摘要： 将2种复合改良剂LI(碳酸钙+铁粉)和HI(羟基磷灰石+铁粉)施加于镉、砷复合污染稻田土壤,设置投加比例分别为1∶2、1∶1、2∶1,通过分析熟化后土壤的pH值、毒性浸出(TCLP提取态)镉、砷含量及交换态镉和砷含量,研究了复合改良剂同时固定这两种污染元素的效果.结果表明,施加LI使土壤pH值提高了0.60~ 1.21,降低了土壤TCLP提取态镉、交换态镉含量,以及TCLP提取态砷和交换态砷含量;与对照相比,配比为2∶1的LI使土壤TCLP提取态镉含量降低了60.97%,效果较好;配比为1∶2和1∶1的LI分别使TCLP提取态砷含量降低了29.81%、 29.85%;配比为1∶2的LI使交换态砷含量降低了55.18%.施加HI同样提高了土壤的pH值(升高了0.51~ 0.73),同时降低了土壤中97.05%~ 98.09%的TCLP提取态镉含量,效果显著;施加HI略微提高了土壤TCLP提取态砷含量,但却略微降低了土壤交换态砷含量.在本实验条件下,综合考虑土壤中镉和砷的稳定化效果,LI的效果明显好于HI.其中,从TCLP提取态镉和砷含量来评价,2∶1的LI施用效果最佳;从交换态镉和砷含量来评价,1∶2的LI施用效果最佳.

语种： 中文

作者： Gu, Jiao-Feng;Zhou, Hang;Yang, Wen-Tao;Peng, Pei-Qin;Zhang, Ping;...

期刊： Environmental Science and Pollution Research,2018年25(9):8608-8619 ISSN：0944-1344

通讯作者： Liao, Bo-Han

作者机构： [Peng, Pei-Qin; Yang, Wen-Tao; Liao, Bo-Han; Zeng, Min; Zhou, Hang; Zhang, Ping; Gu, Jiao-Feng] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Liao, Bo-Han] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Soil additive;Cadmium;Arsenic;Chemical speciation;Bioaccumulation;Rice plant

摘要： A pot experiment was carried out to investigate the remediation of paddy soils contaminated with both Cd and As. The effects of a soil additive (HZB: hydroxyapatite + zeolite + biochar) on the chemical speciation of Cd and As in the soil and on the accumulation and translocation of these two elements in rice plants were studied. The application of HZB decreased the concentration of acid-extractable Cd in the soil by 7.3–32.6% by promoting the transformation of soil Cd from soluble to insoluble species; as a result, the concentration of organically bound Cd in the soil increased by 6.8–49.5%. The application of HZB also promoted the transformation of soil As from soluble to insoluble species, thus increasing the concentration of Ca-bound As by 34.1–93.4% and reducing the concentration of soil-exchangeable As by 12.2–55.1%. However, when the application rate of HZB was greater than 4.0gkg−1, the concentration of soil-exchangeable As increased again. It was found that the application of HZB decreased the Cd and As bioaccumulation capacity of rice root, and among various rice organs, rice husk was the highest in Cd transferring capacity, whereas rice root was the highest in As transferring capacity. When the amount of HZB applied was 0.05–0.2%, the Cd and As concentrations in the various parts of the rice plants decreased significantly. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

语种： 英文

作者： 王倩倩;贾润语;李虹呈;周航;杨文弢;...

期刊： 中国农业科学,2018年51(23):4424-4433 ISSN：0578-1752

作者机构： [王倩倩; 贾润语; 李虹呈; 周航; 杨文弢; 辜娇峰; 彭佩钦; 廖柏寒] 中南林业科技大学环境科学与工程学院, 稻米品质安全控制湖南省工程实验室, 长沙, 410004

关键词： 水稻;水培试验;Cd胁迫;生育时期;Cd累积

摘要： 【目的】探究水稻不同生育时期Cd胁迫对水稻成熟期糙米Cd累积的影响,明确糙米Cd累积关键生育时期,以期适时采取阻控措施降低糙米Cd含量,为水稻安全生产提供理论参考。【方法】以水稻品种湘晚籼13号(晚稻品种)为研究对象,采用水培试验,共设计7个添加外源Cd处理,即CG(全生育时期Cd胁迫,102 d)、 TS(分蘖期Cd胁迫,15 d)、JS(拔节期Cd胁迫,15 d)、BS(孕穗期Cd胁迫,21 d)、FS(灌浆期Cd胁迫, 18 d)、DS(腊熟期Cd胁迫,15 d)、MS(成熟期Cd胁迫,18 d),以全生育时期无Cd胁迫作为空白对照(CK),每个处理重复3次。各处理外源Cd胁迫浓度相同,均为20 μg·L~(-1)。水培试验于2017年7月23日开始,在湖南省长沙市中南林业科技大学水稻试验基地进行。2017年11月19日,水稻成熟后,整株采集水稻,测定指标为不同生育时期Cd胁迫下水稻农艺性状(株高、分蘖数和各部位生物量)和水稻各部位(根、茎、叶、穗、谷壳和糙米) Cd含量,计算水稻各部位Cd累积量以及不同生育时期Cd累积对成熟期糙米Cd累积的相对贡献率。【结果】不同生育时期Cd胁迫对水稻株高、分蘖数以及各部位生物量没有显著影响。灌浆期Cd胁迫下,水稻成熟期糙米Cd含量最高,为1.05 mg·kg~(-1),显著高于水稻成熟期(0.57 mg·kg~(-1))、孕穗期(0.52 mg·kg~(-1))、腊熟期(0.38 mg·kg~(-1))、拔节期(0.31 mg·kg~(-1))和分蘖期(0.17 mg·kg~(-1))Cd胁迫下糙米Cd含量。各生育时期Cd胁迫下水稻成熟期糙米 Cd累积量范围为0.18—1.56 μg/株,糙米Cd累积量大小顺序为:全生育时期Cd胁迫>灌浆期Cd胁迫>成熟期 Cd胁迫>孕穗期Cd胁迫>拔节期Cd胁迫>分蘖期Cd胁迫。孕穗期、灌浆期和成熟期是水稻糙米Cd累积的关键生育时期,对成熟期糙米Cd累积相对贡献率分别为19.7%、39.3%和22.6%,而分蘖期、拔节期和腊熟期的Cd累积对成熟期糙米Cd累积相对贡献较小,贡献率分别为2.4%、4.2%和11.9%。除全生育时期Cd胁迫外,水稻根、茎、穗和谷壳Cd含量均在孕穗期和灌浆期Cd胁迫下较高;各生育时期Cd胁迫下,水稻叶Cd含量无显著性差异。孕穗期和灌浆期Cd胁迫下根Cd累积量较高,分别为86.09 μg/株和79.23 μg/株,显著高于其他生育时期Cd胁迫下根Cd累积量(31.55—40.37 μg/株)。与其他生育时期Cd胁迫相比,水稻植株Cd总累积量在孕穗期和灌浆期Cd胁迫下较高,分别为107.13 μg/株和98.35 μg/株,显著高于其他生育时期Cd胁迫下水稻植株Cd总累积量(42.24—52.47 μg/株)。【结论】水稻的孕穗期、灌浆期和成熟期是控制水稻糙米Cd累积的关键时期。在孕穗期和灌浆期Cd胁迫下,水稻成熟期根和糙米累积Cd最多,因此可以在水稻孕穗期和灌浆期施加改良剂阻隔根系吸收Cd或者阻隔根系吸收的Cd向糙米中转运,从而降低水稻糙米中Cd的累积。

语种： 中文

作者： 杜文琪;曹玮;周航;杨文弢;辜娇峰;...

期刊： 环境科学学报,2018年38(2):492-500 ISSN：0253-2468

通讯作者： Liao, B.

作者机构： [杜文琪; 曹玮; Zhou H.; 杨文弢; 辜娇峰; 彭佩钦; 周航; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China

通讯机构： College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 磁性谷壳生物炭;Cd~(2+)和Zn~(2+);正交实验;吸附;重金属污染废水

摘要： 将水稻谷壳经改性和负磁后制得磁性谷壳生物炭(BC-Fe),通过正交实验研究了pH、生物炭添加量、吸附时间和转速对磁性谷壳生物炭吸附实际污染废水中Cd~(2+)和Zn~(2+)的影响,提出了磁性谷壳生物炭作为实际污染废水处理材料的最佳操作条件,并应用于多步骤废水处理系统中,同时进行了BC-Fe的再生吸附实验.正交实验结果表明,在pH为6.0、固液比为6.0 g·L~(-1)、吸附时间为1.0 h、转速为160 r·min~(-1)的条件下,磁性谷壳生物炭对Cd~(2+)和Zn~(2+)的去除率最高,分别达到61.1%和60.4%,吸附量分别为8.6 mg·g~(-1)和21.3 mg·g~(-1).在实验所设条件下,Cd~(2+)和Zn~(2+)的综合去除效果随着pH和生物炭添加量的增加而显著升高,吸附时间和转速的影响未达显著水平.在多步骤废水处理系统中,使用CaO和Na_2S作为前处理,利用磁性谷壳生物炭二次处理,可使实际污染废水中Cd~(2+)、Zn~(2+)、Pb~(2+)、Mn~(2+)、Fe~(2+)的去除率分别达到100%、99.8%、 99.3%、97.8%、100%,SS降为1.0 mg·L~(-1),此时系统pH为7.5,色度为2倍,出水各项指标均达到硫酸工业污染物排放标准(GB 26132-2010)和污水综合排放标准(GB 8978-1996)的要求.再生实验表明,BC-Fe第3次吸附Cd~(2+)和Zn~(2+)的去除率分别为50.6%和49.1%,吸附材料再生性能良好.

语种： 中文

作者： 辜娇峰;周航;贾润语;王倩倩;李虹呈;...

期刊： 环境科学,2018年39(4):1910-1917 ISSN：0250-3301

通讯作者： Liao, Bo-Han(liaobh1020@163.com)

作者机构： [辜娇峰; 周航; 贾润语; 王倩倩; 李虹呈; 张平; 彭佩钦; 廖柏寒] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha;[辜娇峰; 周航; 张平; 彭佩钦; 廖柏寒] 410004, China<&wdkj&>Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha;[辜娇峰; 周航; 贾润语; 王倩倩; 李虹呈; 张平; 彭佩钦; 廖柏寒] 410004, China

关键词： 三元土壤调理剂;镉;砷;累积;转运;水稻;大田

摘要： 通过镉砷复合污染稻田的土壤调理剂原位治理,研究了三元土壤调理剂QFJ(羟基磷灰石+沸石+改性秸秆炭)对稻田土壤基本理化性质和水稻各部位镉砷累积转运的影响.结果表明,在土壤Cd总量3.58 mg·kg ~(- 1),As总量124.79 mg·kg ~(- 1)污染程度下,施用QFJ后,水稻根际土壤pH值、阳离子交换量及有机质含量有增大的趋势;土壤交换态Cd和As含量可分别从0.37 mg·kg ~(- 1)、0.07 mg·kg ~(- 1)下降到0.12 mg·kg ~(- 1)、0.04 mg·kg ~(- 1). QFJ的施用,可有效降低水稻各部位中Cd和As含量,在9.00 t·hm~(- 2)施用量水平,可将糙米中Cd含量从0.46 mg·kg ~(- 1)下降到0.18 mg·kg ~(- 1),无机As含量从0.25 mg·kg ~(- 1)降低到0.16 mg·kg ~(- 1),同时低于国家食品污染物限量标准0.2 mg·kg ~(- 1)的要求,实现水稻安全生产.施用QFJ减少了水稻根系对Cd和As的富集,降低了水稻植株将Cd从地下部转运到地上部的能力,降低了根系转运Cd的能力以及茎叶、谷壳转运As的能力.

语种： 中文

作者： 李虹呈;王倩倩;贾润语;辜娇峰;周航;...

期刊： 环境科学学报,2018年38(12):4854-4863 ISSN：0253-2468

通讯作者： Liao, B.

作者机构： [李虹呈; 王倩倩; 贾润语; 辜娇峰; Zhou H.; 杨文弢; 周航; 彭佩钦; 廖柏寒] College of Environment Science and Engineering, Central South University of Forestry and Technology, Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China

通讯机构： College of Environment Science and Engineering, Central South University of Forestry and Technology, Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, China

关键词： 外源锌;土壤镉;水稻;根表铁膜;拮抗作用

摘要： 为探明外源锌(Zn)对镉(Cd)污染稻田系统Cd吸收累积的影响,采用盆栽试验,向轻度(Cd含量为0.50 mg·kg~(-1))和中度(Cd含量为1.50 mg·kg~(-1)) Cd污染土壤中施用不同浓度的外源Zn,研究Zn对土壤、水稻根表铁膜和水稻各部位中Cd、Zn含量变化的影响,探讨外源Zn对Cd污染稻田系统Cd吸收累积的交互作用.结果表明,在2种Cd污染土壤中,施用外源Zn显著降低了湘晚籼12糙米Cd含量,降低幅度为13.4%~78.4%;在轻度Cd污染土壤中,施用外源Zn显著降低了威优46糙米Cd含量,降低幅度为14.7%~ 79.8%,而在中度Cd污染土壤中,当外源Zn浓度超过40 mg·kg~(-1)将增加威优46糙米Cd含量;在2种Cd污染土壤下均显著增加2种水稻根表铁膜数量,分别增加14.7%~ 85.9%、5.8%~61.2%;但对土壤交换态Cd含量无显著影响.在2种Cd污染土壤中,2种水稻各部位Cd/Zn比值与Cd含量正线性相关,且各部位Cd/Zn比值呈下降趋势,2种水稻糙米、茎叶间Cd-Zn拮抗作用显著.轻度Cd污染土壤中,施加外源Zn可以降低湘晚籼12和威优46糙米中的Cd含量;中度Cd污染土壤中,外源Zn仍然可以降低湘晚籼12糙米Cd含量,而当外源Zn施加量高于40 mg·kg~(-1)时将增加威优46糙米的Cd含量.

语种： 中文

作者： 辜娇峰;杨文弢;周航;张平;彭佩钦;...

期刊： 水土保持学报,2018年32(3):340-345,351 ISSN：1009-2242

作者机构： 中南林业科技大学环境科学与工程学院, 长沙, 410004;稻米品质安全控制湖南省工程实验室, 稻米品质安全控制湖南省工程实验室, 长沙, 410004;[辜娇峰; 周航; 张平; 彭佩钦; 廖柏寒] 中南林业科技大学环境科学与工程学院, 长沙, 410004 稻米品质安全控制湖南省工程实验室, 稻米品质安全控制湖南省工程实验室, 长沙, 410004;[杨文弢] 中南林业科技大学环境科学与工程学院, 长沙, 410004

关键词： 锌;镉;累积;水稻;土壤

摘要： 通过水稻威优46盆栽种植试验,研究了外源Zn施用(0,40,80,160 mg/kg 4个水平)对Cd中度(0.72 mg/kg)和重度(5.26 mg/kg)污染土壤中Cd生物有效性及水稻Cd累积的差异。结果表明:施Zn对各检测指标存在影响,但土壤Cd总量仍是土壤Cd活性和水稻Cd累积差异变动的主控因素。在Cd中度污染土壤中,施Zn降低了土壤交换态Cd含量1.9%~17.0%,但水稻根表铁膜、根和糙米中Cd含量随Zn施用浓度的增大而增大,糙米Cd含量从0.09 mg/kg上升到0.17 mg/kg,相关分析显示糙米Cd含量与土壤交换态Zn含量显著正线性相关。在Cd重度污染土壤中,施Zn增大了土壤交换态Cd含量2.1%~ 4.8%,但降低了水稻各部位中Cd含量,当施Zn浓度超过80 mg/kg时,糙米Cd含量可从对照组的0.45 mg/kg降低到0.12 mg/kg,符合国家食品污染物限量标准(GB 2762-2017)的要求,相关分析显示糙米Cd含量与土壤交换态Zn含量显著负线性相关。对2种Cd污染程度的土壤,施Zn均可增大Cd在水稻地下部的累积率,从而降低水稻地上部Cd的累积率。在Cd重度污染土壤中,可通过施Zn降低糙米Cd含量,施Zn量80 mg/kg是试验中最佳施用量;但在Cd中度污染土壤中,施Zn有增大糙米Cd含量的风险。

语种： 中文

作者： 陈立伟;杨文弢;周航;高子翔;辜娇峰;...

期刊： 环境科学学报,2018年38(4):1635-1641 ISSN：0253-2468

通讯作者： Liao, B.

作者机构： [陈立伟; 杨文弢; Zhou H.; 高子翔; 辜娇峰; 周航; 廖柏寒] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China

通讯机构： College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 土壤调理剂;Cd污染;产地修复;健康风险评价;目标危害系数

摘要： 选取湖南省长沙市北山镇某中重度Cd污染稻田,研究了土壤调理剂(石灰石+偏高岭土+钙镁磷肥)对稻田土壤重金属Cd、Zn的钝化效果,以及对水稻各部位累积Cd和Zn的影响,并进行了Cd的健康风险评价.结果表明,使用土壤调理剂提高了稻田土壤pH值.Cd的CaCl_2提取态含量降低了0.9%~ 24.1%,Zn的CaCl_2提取态含量降低了22.5%~ 69.6%.土壤调理剂显著降低了水稻糙米中Cd与Zn的含量,与对照相比分别降低了10.8%~ 47.3%、10.3%~ 17.5%;土壤调理剂对水稻糙米Cd的吸收和累积的影响要远大于Zn,水稻糙米中的Cd/Zn比随着土壤调理剂施用量的增加而显著降低.研究区大米重金属Cd目标危害系数THQ值大于1,说明当地人群通过食用大米途径摄入重金属Cd存在健康风险.土壤调理剂有效地抑制了水稻植株对土壤中Cd的吸收,并降低了Cd/Zn比,使糙米中的Cd含量显著降低,从而降低了当地人群通过食用大米途径摄入重金属Cd的健康风险.

语种： 中文

作者： 贾润语;李虹呈;王倩倩;辜娇峰;周航;...

期刊： 环境科学学报,2018年38(11):4505-4511 ISSN：0253-2468

通讯作者： Zhou, H.

作者机构： [贾润语; 李虹呈; 王倩倩; 杨文弢] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China;[辜娇峰; 周航; 彭佩钦; 廖柏寒] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China<&wdkj&>Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha, 410004, China

通讯机构： College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 盐基离子;水稻;Cd污染;土壤

摘要： 盐基离子含量是土壤肥力的重要指标,也是决定土壤Cd生物有效性的重要因素.为探明盐基离子对稻田系统中Cd迁移、转运与累积的影响,本研究通过水稻盆栽试验,按照土壤中盐基离子的物质的量比施加不同浓度梯度KCl、CaCl_2、NaCl和MgCl_2到模拟制备的轻度(0.5 mg·kg~(-1))和中度(1.5 mg·kg~(-1)) Cd污染土壤,分析盐基离子对土壤CaCl_2提取态Cd含量和水稻吸收累积Cd的影响.结果表明:施加盐基离子能够增加土壤阳离子交换量(CEC),在轻度和中度Cd污染土壤中,土壤CaCl_2提取态Cd含量分别下降了24.6% ~ 56.1%和17.0% ~ 71.1%,糙米Cd含量分别降低了9.1%~ 60.5%和7.2%~ 36.0%.在轻度和中度Cd污染土壤中,糙米Cd含量与土壤CaCl_2提取态Cd含量之间存在线性正相关关系,根、茎、叶Cd含量与Ca含量均呈线性负相关.

语种： 中文

作者： Zhou, Hang;Zhu, Wei;Yang, Wen-Tao;Gu, Jiao-Feng;Gao, Zi-Xiang;...

期刊： Ecotoxicology and Environmental Safety,2018年152:91-97 ISSN：0147-6513

通讯作者： Liao, Bo-Han

作者机构： [Peng, Pei-Qin; Du, Wen-Qi; Yang, Wen-Tao; Liao, Bo-Han; Zhu, Wei; Gao, Zi-Xiang; Chen, Li-Wei; Zhou, Hang; Zhang, Ping; Gu, Jiao-Feng] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Liao, Bo-Han] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Cadmium;Growth stages;Iron plaque;Rice (Oryza sativa L.);Soil;Translocation

摘要： Rice consumption is considered the main source of human dietary Cd intake in Southeast Asia. This study aimed to investigate Cd uptake, accumulation, and remobilization in iron plaque and rice (Oryza sativa L. cv. ‘Xiangwanxian 12′) tissues at different growth stages. A pot experiment was performed in two Cd-contaminated paddy soils. Cd concentrations in iron plaque and rice tissues at five different growth stages (tillering, booting, milky, dough, and maturing) were measured. Cd concentrations in iron plaque and rice tissues (roots, stems, leaves, spikelet, husks, and brown rice) varied with growth stage. Cd accumulation in rice plants increased with extending growth in both soils, reaching 15.3 and 35.4 μg/pot, respectively, at the maturing stage. The amounts of Cd in brown rice increased from the milky to maturing stages, with the greatest percentage uptake during the maturing stage. Cd amount in iron plaque significantly affected the uptake and accumulation of Cd in roots and aerial parts of rice plants. Accumulated Cd in leaves was remobilized and transported during the booting to maturing stages, and the contributions of Cd transportation from leaves to brown rice were 30.0% and 22.5% in the two soils, respectively. A large amount of Cd accumulated in brown rice during the maturing stage. The transportation of remobilized Cd from leaves was also important for the accumulation of Cd in brown rice. © 2018

语种： 英文

作者： 曹玮;周航;邓贵友;杜文琪;杨文弢;...

期刊： 环境工程学报,2017年11(3):1437-1444 ISSN：1673-9108

通讯作者： Liao, B.

作者机构： [周航; 杜文琪; 彭佩钦; 辜娇峰; 邓贵友; 杨文弢; 廖柏寒; 曹玮] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China

通讯机构： [Liao, B.] C;College of Environment Science and Engineering, China

关键词： 生物炭;磁性;吸附;机理;废水

摘要： 将谷壳生物炭用酸改性后负载磁性Fe_3O_4,得到一种新的吸附材料(BC-Fe)。通过单因素吸附实验,研究了时间、pH、添加量、浓度以及温度等参数对BC-Fe吸附废水中Pb~(2+)的影响,并对其进行比表面积及傅里叶红外光谱分析,探讨该磁性生物炭对Pb~(2+)的吸附机理。结果表明,BC-Fe对Pb~(2+)的吸附能在2 h内基本达到平衡。在Pb~(2+)溶液初始浓度为100 mg·L~(-1),pH=5.0,温度为25 ℃,分别添加0.1 g和0.15 g的BC-Fe于50 mL Pb~(2+)溶液中,单位质量的BC-Fe对溶液中Pb~(2+)的吸附量分别为40.6 mg·g~(-1)和33.2 mg·g~(-1),去除率分别为81.3%和99.9%。该吸附过程符合拟二级动力学模型,理论平衡吸附量为43.9 mg·g~(-1)。用Langmuir等温吸附方程能够很好地描述其吸附行为;热力学研究表明,BC-Fe对Pb~(2+)的吸附过程是自发的吸热过程。

语种： 中文

作者： 田桃;雷鸣;周航;杨文弢;廖柏寒;...

期刊： 环境科学,2017年38(6):2553-2560 ISSN：0250-3301

通讯作者： Liao, Bo-Han(liaobh1020@163.com)

作者机构： [田桃; 雷鸣; 周航; 杨文弢; 廖柏寒; 胡立琼; Zeng, Min] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[田桃; 雷鸣; 周航; 杨文弢; 廖柏寒; 胡立琼; Zeng, Min] 410004, China

关键词： 钝化剂;蔬菜土壤;Pb、Cd、As复合污染;辣椒;转运系数

摘要： 通过辣椒种植田间试验,研究了硫酸铁和碳酸钙对土壤Pb、Cd和As复合污染的生物有效性以及对辣椒中Pb、Cd、As迁移与累积的影响.结果表明:①硫酸铁和碳酸钙都能显著降低土壤中Pb、Cd的TCLP提取态含量,使土壤中As的TCLP提取态含量显著升高.②硫酸铁使辣椒果实中Pb和Cd含量分别降低7.2%~22.9%和2.3% ~ 2.9%,而对As含量没有影响;碳酸钙使辣椒果实中Pb、Cd、As的含量分别降低15.8% ~16.3%、11.8% ~ 15.0%、0.03% ~ 53.2%.③硫酸铁使辣椒茎到果实中Pb、Cd、As的转运系数分别最大降低16.7%、68.0%、10.2%;碳酸钙使辣椒茎到果实中Pb、Cd、As的转运系数分别最大降低16.7%、51.5%、45.6%.硫酸铁和碳酸钙都能有效降低旱地中Pb、Cd、As向辣椒中迁移,且碳酸钙效果比硫酸铁好.

语种： 中文

作者： 李造煌;杨文弢;邹佳玲;周航;曾清如;...

期刊： 环境科学学报,2017年37(6):2322-2330 ISSN：0253-2468

通讯作者： Liao, B.

作者机构： [Zeng Q.] College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China;[杨文弢; 邹佳玲; 周航; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;[李造煌] College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China<&wdkj&>College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China

通讯机构： College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 土壤污染;钙镁磷肥;水稻

摘要： 通过水稻盆栽试验,研究了施用钙镁磷肥对Cd污染稻田中Ca、Mg、Cd生物有效性的影响和种植水稻(湘晚籼12号、威优46号)后水稻各部位Ca、Mg、Cd含量的差异.结果表明,施用钙镁磷肥能显著提升土壤pH值,降低土壤TCLP提取态Cd含量,且降低效果随着水稻生育期的延长逐渐增强.与对照相比,施用0.8 g·kg~(-1)的钙镁磷肥,使湘晚籼12号种植土壤和威优46号种植土壤TCLP提取态Cd含量在熟化期、灌浆期、分蘖期、成熟期分别下降了12.7%、15.6%、21.5%、61.9%和12.7%、72.6%、42.1%、59.7%.施用钙镁磷肥能显著增加水稻种植土壤中TCLP提取态Ca、Mg含量,降低TCLP提取态Cd含量,同时显著增加水稻各生育期各部位Ca、Mg含量并降低其Cd含量,水稻各部位中Ca、Mg含量与 Cd含量均呈现负相关关系,表明外源Ca和Mg的加入对水稻累积Cd产生了拮抗作用.施用钙镁磷肥能显著降低水稻糙米中Cd含量并提高水稻产量.与对照相比,施用0.2~ 0.8 g·kg~(-1)的钙镁磷肥,水稻湘晚籼12号和威优46号糙米中Cd含量分别下降了36.8%~ 52.6%和53.3%~ 75.6%.威优46号比湘晚籼12号更易将土壤Cd向水稻籽粒中转运.

语种： 中文