作者： Jiang, Kai;Deng, Xiao;Zhou, Hang;Long, Jian;Dong, Xia;...

期刊： Human and Ecological Risk Assessment,2021年27(2):352-367 ISSN：1080-7039

通讯作者： Peng, Pei-qin

作者机构： [Liao, Bo-han; Long, Jian; Dong, Xia; Huang, Jing; Peng, Pei-qin; Hou, Hong-bo; Deng, Xiao; Jiang, Kai; Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Peng, Pei-qin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.

关键词： Paddy irrigation water;cadmium;sediment;organic matter;target hazard quotient;human health risk

摘要： Paddy crops cadmium (Cd) pollution has received widespread attention. Here, we assessed levels of Cd and organic matter fractions in sediments and paddy system of 19 paddy fields that were located 20 km away from an irrigation water source in central Hunan Province, China, to determine pollution risks of Cd to human health. With the exception of a single study site, levels of Cd in irrigation water met national irrigation water quality standards (GB5084-2005). In contrast, average Cd content in paddy soil and brown rice (0.625 and 0.567 mg kg−1, respectively) was 1.6 and 2.8 times higher than levels permitted by national standards for soils (GB15618-2018) and food safety (GB2762-2017), respectively. Dominant speciated Cd in sediments included extractable, oxidizable, and reducible Cd that accounted for 84.96% of total sediment Cd content. The average carbon content of humus was 18.906 g kg−1. Fulvic acid content of humus was positively correlated with reducible and oxidizable Cd content. Cd pollution in paddy fields was great and risks of Cd in brown rice to human health were high. Risk assessment can provide reasonable suggestions for human diets and provide new ideas for the prevention and control of soil Cd pollution. © 2020 Taylor & Francis Group, LLC.

语种： 英文

作者： Li, Xinyang;Peng, Peiqin*;Long, Jian*;Dong, Xia;Jiang, Kai;...

期刊： Journal of Cleaner Production,2020年256:120494 ISSN：0959-6526

通讯作者： Peng, Peiqin;Long, Jian

作者机构： [Peng, Peiqin; Long, Jian; Dong, Xia; Hou, Hongbo; Peng, PQ; Long, J; Li, Xinyang; Jiang, Kai] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Peng, Peiqin; Long, Jian; Dong, Xia; Hou, Hongbo; Li, Xinyang; Jiang, Kai] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Peoples R China.;[Li, Xinyang] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China.

通讯机构： [Peng, PQ; Long, J] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.

关键词： Bioremediation;Cadmium sulfide;Chemical speciation;Complexation;II-VI semiconductors;Ligands;Plants (botany);Selenium compounds;Chemical forms;Insoluble Cd;Low-Cd rice;Mobilization;Speciation;Subcellular distribution;Soils

摘要： Selecting rice varieties that adsorb less or more Cd from soil can be respectively applied to safety rice production and phytoremediation. Considering plant-induced Cd mobilization will contribute to the rice cultivar screening. We firstly executed a pot experiment to assess the effect of rice plants on soil Cd forms (BCR method). The results showed that the presence of rice significantly reduced residual-Cd (BCR4) concentrations, indicating the rice plant-induced insoluble Cd mobilization. Subsequent sand culture trial with four rice species (conventional and hybrid low-Cd rice, conventional and hybrid high-Cd rice) and four insoluble Cd compounds (CdS, [Cd3(PO3)2], CdCO3 and CdSe) were conducted to further discuss the interaction between insoluble Cd among different rice varieties. The results showed that rice plants do solubilize soil Cd especially insoluble Cd form due to the interaction among rhizosphere acidification, root secretion of organic matter ligand and other ligands, like phytosiderophore. High-Cd cultivar and hybrid rice cultivar had a greater ability to solubilize the insoluble Cd. Visual MINTEQ predicted that free Cd2+ (∼85.6%) were the dominant Cd speciation of mobilized Cd followed by Cd-DOM complexes (∼7.80%) and other ligand-complexes (∼6.51%) in the rhizosphere solution. Cd bound to protein and pectates and to undissolved phosphate were the major mobilized-Cd chemical forms in rice roots and shoots. In addition, the subcellular analysis suggested that half of mobilized-Cd precipitated in the cell wall of rice root and shoot and the other Cd entranced into the protoplast of rice cell. The fate of rice plant-induced insoluble Cd mobilization could be an indispensable factor in prospective phytoremediation and cleaner rice production. © 2020 Elsevier Ltd

语种： 英文

作者： 黄敬;李欣阳;文沙;蒋凯;龙坚;...

期刊： 环境科学,2020年41(7):3418-3425 ISSN：0250-3301

通讯作者： Long, Jian(longjiancsuft@yeah.net);Peng, Pei-Qin(pqpeng123@sina.com)

作者机构： [黄敬; 李欣阳; 文沙; 蒋凯; 龙坚; 彭佩钦; 侯红波] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[黄敬; 李欣阳; 文沙; 蒋凯; 龙坚; 彭佩钦; 侯红波] 410004, China

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

关键词： 水分管理;土壤母质;环境行为;土壤性质

摘要： 为探明不同母质发育稻田土壤Cd环境行为对水分管理模式变化的响应差异,通过不同的水分管理模式(长期淹水、湿润灌溉和干湿交替), 在3种外源Cd水平下(0.5、2.0和5.0 mg·kg ~(- 1)), 对2种母质发育稻田土壤(黄泥田和麻砂泥)进行培养试验,分析了土壤氧化还原电位(Eh值) 、pH值、土壤溶液Cd含量及土壤Cd赋存形态等指标.结果表明,不同母质发育土壤pH值和Eh值对水分管理模式变化的响应存在差异,土壤pH值变化率分别为长期淹水: - 2.61% (黄泥田)和2.25% (麻砂泥), 干湿交替: - 1.96%(黄泥田)和0.52%(麻砂泥), 湿润灌溉: - 4.08%(黄泥田)和- 0.52%(麻砂泥), 2种母质土壤Eh值与pH值呈极显著负相关; 2种母质类型土壤溶液Cd质量浓度随水分管理模式变化规律一致,且该质量浓度麻砂泥高于黄泥田,其均值分别为: 1.03 μg·L ~(- 1) (黄泥田), 1.07 μg·L ~(- 1) (麻砂泥);水分管理模式对不同母质发育土壤中有机结合态和铁锰结合态Cd含量影响不显著,长期淹水会促进Cd向残渣态转化,且在黄泥田中这一促进作用比在麻砂泥中强.因此,在应用水分管理调控土壤Cd生物有效性的过程中,需根据土壤母质类型区别实施.

语种： 中文

作者： 唐盛爽;蒋凯;黄敬;覃建军;龙坚;...

期刊： 水土保持学报,2020年34(02):365-371 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;[龙坚; 蒋凯; 彭佩钦; 侯红波; 唐盛爽; 黄敬; 覃建军] 中南林业科技大学

关键词： 源解析;Cd净通量;稻田土壤

摘要： 为探明我国南方典型稻田土壤Cd的输入输出特征与变化规律,以湖南省湘乡市某地区稻田为目标,探讨了3种输入途径(肥料、灌溉水和大气沉降)和2种输出途径(地表径流和稻草离田)与土壤Cd含量之间的关联。结果表明:2017-2018年和2018-2019年间Cd的净通量分别为3.226,-1.246 g/(hm~2·a),总变化量为+1.980g/(hm~2·a)。其中大气沉降是最主要的输入方式,2年间Cd输入通量分别为8.68,5.75g/(hm~2·a),平均贡献率高于94%;稻草离田是最主要的输出方式,2年间Cd输出通量分别为5.73,7.32g/(hm~2·a),平均贡献率高于97%。通过输入输出平衡分析,2年内土壤Cd含量呈现增加趋势。因此,有必要采取如稻草离田等农业管理措施以提高土壤的安全利用效率。研究结果可为该区域土壤Cd污染源阻控提供理论依据和方法参考。

语种： 中文

作者： 覃建军;唐盛爽;蒋凯;黄敬;侯红波;...

期刊： 水土保持学报,2020年34(02):372-377 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,长沙 410004;[龙坚; 蒋凯; 彭佩钦; 侯红波; 唐盛爽; 黄敬; 覃建军] 中南林业科技大学

关键词： 镉;象草;生物量;富集;转运

摘要： 选取南方典型母质发育耕作土紫泥田和麻砂泥,通过添加不同浓度梯度的外源Cd(0,0.5,2.0,10.0,20.0mg/kg)进行盆栽试验,并结合傅里叶红外与X射线衍射等手段,研究了象草在土壤Cd胁迫下的耐受能力及修复效果。结果表明:紫泥田与麻砂泥中象草对Cd的耐性指数为0.65~0.79,均表现出较好的耐性;外源Cd浓度为0,0.5,2.0mg/kg时象草富集系数均大于1,表现出较好的Cd富集性;象草转运系数为0.60~0.84,属于非Cd超富集植物,但因地上部分生物量巨大,象草在无外源Cd添加时对土壤Cd的修复效率依然可观,且在麻砂泥中最为显著,为2.48%。另外,土壤理化性质如pH、CEC、有机官能团等不同也可导致象草对Cd的富集呈现差异。综合分析,象草更适宜于中轻度Cd污染土壤的修复,且对麻砂泥的修复效率优于紫泥田。

语种： 中文

作者： 覃建军;唐盛爽;蒋凯;黄敬;侯红波;...

期刊： 环境科学,2020年41(8):3862-3869 ISSN：0250-3301

通讯作者： Long, Jian(longjiancsuft@yeah.net);Peng, Pei-Qin(pqpeng123@sina.com)

作者机构： [Qin J.-J.; 唐盛爽; 蒋凯; 黄敬] 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, Changsha, 410004, China;[侯红波; 龙坚; 彭佩钦] College of Environmental 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 Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China

关键词： 谷氨酸二乙酸四钠(GLDA);象草;修复;镉;农田

摘要： 为探明螯合剂谷氨酸二乙酸四钠(GLDA)对象草修复镉(Cd)污染农田的影响,通过田间小区试验,于60d内以不同方式(总施加量585、1170和2340kg·hm~(-2)分别等分为1~4次施加,分2~4次施加的时间间隔分别为30、20和15d)向已种植60d象草的Cd污染农田(总Cd:0.62mg·kg~(-1))施加GLDA,分析了象草地上部生物量、Cd含量和Cd提取量以及土壤pH和可溶性有机碳(DOC)质量浓度等指标.结果表明,少量且分多次施加GLDA能显著提高象草地上部生物量和Cd含量,其中分施次数和总施加量分别是生物量和Cd含量的关键影响因子;Cd提取量在总施加量585kg·hm~(-2)分4次施加时最高,为16.78g·hm~(-2),较CK(不施加GLDA)显著提高275.39%;土壤pH、DOC质量浓度和DTPA-Cd含量与总施加量和分施次数存在显著正相关关系;DOC质量浓度是影响DTPA-Cd含量的主要因素;土壤总Cd含量在总施加量585kg·hm~(-2)分4次施加时可较种植象草前土壤降低3.23%.因此,在利用象草修复Cd污染农田时,施加GLDA具有重要意义,且需合理选择施加方式.

语种： 中文

作者： 董霞;李虹呈;陈齐;李欣阳;龙坚;...

期刊： 水土保持学报,2019年33(4):342-348 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;中南林业科技大学稻米品质安全控制湖南省工程实验室,长沙 410004;[龙坚; 彭佩钦; 侯红波; 廖柏寒; 陈齐; 李欣阳; 李虹呈; 董霞] 中南林业科技大学

关键词： 不同母质土壤;不同生育期;水稻;Cd累积;Cd安全临界值

摘要： 通过选取土壤有效态镉(Cd)含量相近、母质不同的水稻土河沙泥(河流冲积物发育)和紫泥田(紫色砂页岩母质发育),添加不同浓度的外源Cd(0,0.5,1,2,5 mg/kg)模拟Cd污染稻田土壤进行盆栽试验,研究不同母质稻田土壤Cd胁迫条件下水稻不同生育期对Cd吸收累积的差异,并推算出土壤Cd环境安全临界值.结果表明,水稻生育期2种土壤有效态Cd含量均在分蘖期最高,河沙泥有效态Cd含量平均为0.47 mg/kg,紫泥田平均为0.36 mg/kg,同一外源Cd水平下,河沙泥土壤有效态Cd含量高于紫泥田.对河沙泥而言,随着外源Cd浓度的增加,水稻总生物量呈现先增加后下降的趋势,当外源Cd浓度为1 mg/kg时达到最大生物量,为47.11 g/pot;而紫泥田水稻生物量呈现逐渐增加的趋势,但各处理间差异不显著(P＞0.05).2种土壤中水稻糙米、谷壳、茎叶、根Cd含量均随外源Cd浓度的增加而增加,整体分布特征为根＞茎叶＞谷壳＞糙米,且河沙泥高于紫泥田;河沙泥水稻平均Cd累积量为51.71μg/pot,紫泥田平均Cd累积量为42.56μg/pot,2种土壤成熟期水稻Cd累积量对比分蘖期分别增加1.45,1.07倍.回归分析表明,河沙泥和紫泥田稻米Cd超标的土壤Cd安全临界值分别为2.03,3.14 mg/kg.水稻对Cd的吸收累积特征及土壤Cd安全临界值因土壤母质不同而存在显著差异.

语种： 中文

作者： 董霞;李虹呈;陈齐;李欣阳;蒋凯;...

期刊： 环境化学,2019年38(6):1298-1306 ISSN：0254-6108

作者机构： 中南林业科技大学环境科学与工程学院,长沙,410004;中南林业科技大学稻米品质安全控制湖南省工程实验室,长沙,410004;[龙坚; 蒋凯; 彭佩钦; 侯红波; 廖柏寒; 陈齐; 李欣阳; 李虹呈; 董霞; 黄敬] 中南林业科技大学

关键词： 改良剂;土壤;水稻;镉累积

摘要： 为研究改良剂(石灰、硅钙镁肥)对典型稻田土壤-水稻系统Cd吸收累积的影响,选取河沙泥(潮土母质发育)和紫泥田(紫色砂页岩母质发育)模拟制备成中度Cd污染土壤,施加不同用量的石灰和硅钙镁肥,进行水稻盆栽试验,分析土壤pH、土壤Cd形态以及水稻各部位Cd含量变化,探讨不同改良剂对不同土壤-水稻系统Cd吸收累积的影响.结果表明,施用石灰和硅钙镁肥能显著提高河沙泥土壤pH值,分别提高0.62— 0.79个单位、0.35—0.46个单位,但对紫泥田pH值无显著影响.向河沙泥中施用石灰能降低其土壤酸提取态 Cd含量,且在S3.0处理时降幅最大;而紫泥田施用硅钙镁肥能显著降低其酸提取态Cd.施用石灰和硅钙镁均能降低河沙泥水稻糙米Cd含量,分别降低23.5%—35.9%、9.5%—21.9%,且随着施用量的提高,糙米Cd含量降低幅度逐渐增大;施用硅钙镁肥能显著降低紫泥田糙米Cd含量,下降幅度为23.5%— 34.1%.同种改良剂对水稻Cd吸收累积的影响因土壤类型不同而存在差异,向河沙泥中施用石灰和紫泥田中施用硅钙镁能最大程度抑制水稻对Cd的吸收累积,降低糙米Cd含量,提高稻米品质.

语种： 中文

作者： Chen, Qi;Peng, Pei-Qin*;Long, Jian;Li, Xin-Yang;Ding, Xianqing;...

期刊： SOIL & TILLAGE RESEARCH,2019年194:104315 ISSN：0167-1987

通讯作者： Peng, Pei-Qin

作者机构： [Peng, Pei-Qin; Liao, Bo-Han; Long, Jian; Li, Xin-Yang; Chen, Qi; Hou, Hong-Bo; Ding, Xianqing] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Peng, Pei-Qin; Liao, Bo-Han; Long, Jian; Li, Xin-Yang; Chen, Qi; Hou, Hong-Bo; Ding, Xianqing] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.;[Chen, Qi] Huazhong Univ Sci & Technol, Coll Hydropower & Informat Engn, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China.;[Peng, Pei-Qin] 498 Shaoshan South Rd, Changsha, Hunan, Peoples R China.

通讯机构： [Peng, Pei-Qin] 4;498 Shaoshan South Rd, Changsha, Hunan, Peoples R China.

关键词： Cadmium;Evaluation;Extraction methods;Phytoavailability;Rice;Soil solution

摘要： While the evaluation of cadmium (Cd) phytoavailability in rice (Oryza sativa L.)–soil systems has attracted considerable attention in recent years, the results vary based on the evaluation method used. The objective of this work was to use field capacity-derived soil solution extraction (SSE) to evaluate the Cd phytoavailability in two typical paddy soils (purple paddy soil and red paddy soil) during an entire rice growth season. Compared to three conventional extraction methods diethylenetriaminepentaacetic acid (DTPA) extraction, toxicity characteristic leaching procedure (TCLP), and HCl extraction], field capacity-derived SSE resulted in the strongest correlation between extracted Cd and the Cd contents in different rice tissues (root, gem, leaf, ear, husk, and brown rice). When the data for the two soil types were combined, SSE was the best predictor of total accumulated Cd in rice, with linear correlation coefficients of 0.836, 0.831, 0.919, and 0.909 for the tillering stage, heading stage, filling stage, and mature stage, respectively. In contrast, TCLP was only suitable for predicting total Cd accumulation in the heading and mature stages (linear correlation coefficients of 0.813 and 0.931, respectively), while DTPA was only effective in the heading stage (linear correlation coefficient of 0.8306). These results demonstrate the potential of field capacity-based SSE to predict Cd phytoavailability in soil–rice systems with different soil types. © 2019 Elsevier B.V.

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： 黄敬;龙坚;蒋凯;唐盛爽;覃建军;...

期刊： 环境生态学,2019年1(04):54-62 ISSN：2096-6830

作者机构： 中南林业科技大学 环境科学与工程学院,湖南 长沙,410004;[龙坚; 蒋凯; 彭佩钦; 侯红波; 唐盛爽; 廖柏寒; 李欣阳; 黄敬; 杨强; 覃建军] 中南林业科技大学

关键词： 有机酸;土壤中Cd解吸;土壤有机质

摘要： 以板页岩母质土壤黄泥田和第四纪红壤母质土壤红黄泥为研究对象,通过老化试验和解吸试验研究草酸、柠檬酸对不同母质土壤中Cd的解吸作用及影响机制。结果表明:黄泥田中Cd的存在形态较红黄泥更易迁移或被利用。随有机酸添加量增加,土壤pH降低,Cd的解吸作用增强。有机酸种类对土壤Cd解吸行为的影响也存在一定差异。去除土壤有机质可以通过改变土壤基团种类和含量影响Cd2+与土壤表面之间的相互作用进而影响Cd的解吸。综合以上结果可知,外源有机酸主要通过影响土壤溶液pH、有机配体与土壤表面及Cd2+的络合反应来影响Cd的解吸,土壤母质类型及其理化性质是影响外源有机酸对土壤中Cd解吸行为的重要因素。

语种： 中文

作者： 蒋凯;龙坚;李欣阳;董霞;王树兵;...

期刊： 环境科学学报,2019年39(2):553-559 ISSN：0253-2468

通讯作者： Peng, P.

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, 稻米品质安全控制湖南省工程实验室, 长沙, 410004;长沙县黄兴镇农业综合服务中心, 长沙, 410100;宁乡市双江口镇农业综合服务中心, 长沙, 410601;[蒋凯; 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<&wdkj&>Hunan Engineering Laboratory for Control of Rice Quality and Safety, 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： 典型土壤;镉;氯离子;土壤溶液

摘要： 土壤镉( Cd)的环境行为与其在土壤溶液中的存在形态以及陪伴离子有关,然而外源Cl~-与土壤溶液中Cd~(2+)的关系以及不同母质土壤对 Cd~(2+)的环境行为的影响并没有明确的结论.选取2种水稻土(第四纪红色黏土母质发育的红黄泥、紫色砂页岩母质发育的紫泥田)为研究对象,添加离子态外源Cd~(2+)( 0、1、2.5、5 mg·kg~(-1) ) ,平衡老化后添加外源Cl~-( 0、0.6、1.2 mg·kg~(-1) ) ,在保持水分恒定的情况下进行模拟培养试验,研究外源Cl~-添加对土壤溶液Cd~(2+)浓度的影响.结果表明,随着外源Cd~(2+)的增加,土壤溶液Cd~(2+)的浓度提高,红黄泥土壤溶液Cd~(2+)的浓度显著高于紫泥田;添加Cl~-会使土壤溶液中Cd~(2+)浓度升高,且Cd~(2+)浓度与外源Cl~-呈显著正相关,红黄泥和紫泥田土壤溶液中Cd~(2+)的平均浓度比不添加 Cl~-时Cd~(2+)的平均浓度分别增加了12.74%、51.49%;土壤对Cd~(2+)的吸附关系符合Freundlich等温吸附方程,紫泥田对Cd~(2+)的吸附量显著高于红黄泥,添加Cl~-对红黄泥Cd~(2+)的吸附影响很小,而对紫泥田的影响显著.Cl~-存在下,红黄泥和紫泥田的解吸率分别为12.50%~ 19.25%、14.76% ~ 24.99%,外源Cl~-添加对Cd~(2+)解吸影响小.综合分析认为,Cl~-对不同土壤Cd~(2+)的吸附解吸行为影响有较大的差异.

语种： 中文

作者： Chen, Qi;Peng, Peiqin*;Hou, Hongbo;Ding, Xianqing;Long, Jian;...

期刊： Human and Ecological Risk Assessment,2019年25(8):2160-2173 ISSN：1080-7039

通讯作者： Peng, Peiqin

作者机构： [Peng, Peiqin; Liao, Bohan; Long, Jian; Hou, Hongbo; Chen, Qi; Li, Xinyang; Ding, Xianqing] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, 498 Shaoshan South Rd, Changsha, Hunan, Peoples R China.;[Peng, Peiqin; Liao, Bohan; Long, Jian; Hou, Hongbo; Chen, Qi; Li, Xinyang; Ding, Xianqing] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha, Peoples R China.

通讯机构： [Peng, Peiqin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, 498 Shaoshan South Rd, Changsha, Hunan, Peoples R China.

关键词： rice;cadmium;soil quality standard;BCR sequential extraction;soil Cd threshold

摘要： Soil quality standards used for agricultural land do not fully consider the effect of soil properties on cadmium (Cd) uptake by crops. A pot experiment with six types of soil derived from two typical soil parent materials was conducted to determine the effect of soil properties on the soil Cd fractions and Cd concentration in rice grain. The results of soil Cd fractions obtained by the Community Bureau of Reference sequential extraction revealed significant differences among soil types. Redundancy analysis showed that soil pH was the most influential factor affecting soil Cd fractions for red paddy soil, but soil pH, soil organic matter, and clay content were significant for purple paddy soil. Stepwise multiple linear regression analysis showed that soil clay and soil organic matter were the two most significant variables contributing to soil Cd threshold, explaining 97.8% of the variance. These results suggest that soil clay and organic matter contents should be considered when evaluating the risk of Cd in paddy soil. © 2019, © 2019 Taylor & Francis Group, LLC.

语种： 英文

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： 李欣阳;龙坚;王树兵;陈齐;董霞;...

期刊： 环境科学,2018年39(1):406-414 ISSN：0250-3301

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

作者机构： [李欣阳; 龙坚; 陈齐; 董霞; 蒋凯; 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;[王树兵] Agricultural Integrated Service Center of Huangxing Town, Changsha;410100, China;[李欣阳; 龙坚; 陈齐; 董霞; 蒋凯; 侯红波; 彭佩钦; 廖柏寒] 410004, China

关键词： 母质类型;双季稻;Cd累积;Cd安全阈值

摘要： 用盆栽试验方法研究典型土壤双季稻条件下水稻对Cd的吸收累积差异.选取典型水稻土黄泥田(板页岩母质发育)和麻砂泥(花岗岩母质发育),通过添加不同浓度梯度外源Cd,进行盆栽试验,研究双季稻不同生育期土壤有效态Cd(DTPA-Cd)、水稻植株各部位以及糙米Cd累积情况.结果表明,双季稻晚稻生育期土壤有效态Cd大于早稻,黄泥田大于麻砂泥,其差异性均达极显著水平(P<0.01).水稻植株各器官(根、茎、叶、壳和糙米)Cd累积量随外源Cd增加和生育期的延长而呈现递增的趋势.不同生育期、不同土壤水稻糙米与植株各器官Cd累积量差异显著,具体表现为:早稻小于晚稻,黄泥田小于麻砂泥.水稻各器官(根、茎、叶、壳和糙米)中Cd含量与土壤有效Cd含量呈显著或极显著正相关关系.应用稻米Cd含量预测模型及水稻累积Cd的特征方程推算出土壤Cd安全阈值为:黄泥田早稻0.98 mg·kg~(-1)和晚稻:0.83 mg·kg~(-1);麻砂泥分别为0.86 mg·kg~(-1)和0.56 mg·kg~(-1).不同母质土壤的安全阈值与环境容量不同,其环境质量标准与污染修复控制措施应该有所区别.

语种： 中文

作者： 李欣阳;龙坚;董霞;蒋凯;王树兵;...

期刊： 湖南生态科学学报,2018年5(3):1-9 ISSN：2095-7300

作者机构： 中南林业科技大学环境科学与工程学院;中南林业科技大学稻米品质安全控制湖南省工程实验室;[王树兵] 长沙县黄兴镇农业综合服务中心;[刘文辉] 宁乡市双江口镇农业综合服务中心;[龙坚; 蒋凯; 彭佩钦; 侯红波; 廖柏寒; 董霞; 李欣阳] 中南林业科技大学

关键词： 土壤;硅钙镁肥;水稻;根表铁膜;再转运

摘要： 为研究硅钙镁肥（GF）对不同母质稻田土壤水稻Cd吸收累积的影响及其差异,选取黄泥田（板页岩母质发育水稻土）和麻砂泥（花岗岩母质发育水稻土）进行水稻盆栽试验,分析各生育时期土壤pH值与CEC变化、土壤溶液中Cd浓度、水稻各部位（根、茎、叶、谷壳和糙米） Cd含量及水稻全株总累积量、水稻根表铁膜Cd、Fe含量与总累积量.结果表明:稻田土壤施用GF显著降低了土壤溶液Cd浓度;施用GF显著提升了土壤pH和CEC;施用GF降低了水稻根、茎、叶、谷壳与糙米中的Cd含量,显著降低水稻全株Cd累积量.稻田土壤施用GF促进了水稻根表铁膜的形成,增加了各生育时期DCB-Fe、降低了DCB-Cd含量,抑制了Cd由根部向上迁移;稻田土壤施用GF,黄泥田与麻砂泥水稻糙米Cd含量降低至0.11 mg/kg和0.15 mg/kg,均低于国家标准.相关性分析表明,土壤pH与土壤溶液Cd浓度、水稻糙米Cd含量呈显著（P<0.05）或极显著负相关（P<0.01）,水稻根表铁膜Fe累积量与DCB-Cd、根与糙米Cd含量呈极显著负相关（P<0.01）; GF使叶对糙米Cd再转运贡献率降低5.88%（黄泥田）和12.80%（麻砂泥）.稻田土壤施用GF可有效阻控水稻对Cd的吸收累积,且麻砂泥效果优于黄泥田.

语种： 中文

作者： Li, Xin-Yang;Long, Jian;Peng, Pei-Qin*;Chen, Qi;Dong, Xia;...

期刊： International Journal of Environmental Research,2018年12(6):877-885 ISSN：1735-6865

通讯作者： Peng, Pei-Qin

作者机构： [Peng, Pei-Qin; Liao, Bo-Han; Li, Xin-Yang; Long, Jian; Dong, Xia; Chen, Qi; Hou, Hong-Bo; Jiang, Kai] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Peng, Pei-Qin; Liao, Bo-Han; Li, Xin-Yang; Long, Jian; Dong, Xia; Chen, Qi; Hou, Hong-Bo; Jiang, Kai] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Peng, Pei-Qin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Hunan, Peoples R China.

关键词： bioaccumulation;bioavailability;biological uptake;cadmium;contaminated land;fertilizer;lime;remobilization;rice;soil amendment;soil type;China

摘要： Lime and Si fertilizer are effective amendments for alleviating Cd accumulation in crops. In this study, two Cd-polluted typical soils from different regions in China were sampled to conduct a pot experiment. The effects of two soil amendments [calcium oxide of quicklime (SH) and Si–Ca–Mg fertilizer (GF)] on the distribution of Cd fractions in soil with and without rice-planting treatment and on Cd uptake and accumulation in rice were investigated. The results showed that SH and GF application significantly reduced Cd accumulation in rice in YSS and GSS, and that the maximum Cd reduction in GSS reached 319μgpot−1 with SH treatment. SH and GF significantly decreased and increased, respectively, the proportions of Acid-Cd and Res-Cd in the soil. Rice-planting treatment activated Res-Cd compared with no rice-planting treatment, and SH and GF restrained the remobilization process. Significant positive correlations were found between Res-Cd remobilization rates in soil and Cd content in brown rice. Multiple regression revealed that applying GF at dosages of 1.296gkg−1 and 1.246gkg−1 in YCS and GSS, respectively, was an ideal method to control soil acidity. This study highlighted the view that Res-Cd remobilization provoked by rice plays a considerable role in influencing Cd bioavailability in the soil, that soil type should be considered as a factor when applying soil amendments to contaminated soils, and that soil amendment dosages should vary according to soil type. © 2018, University of Tehran.

语种： 英文

作者： 李芸;李科林;龙坚

期刊： 教育教学论坛,2018年(08):122-123 ISSN：1674-9324

作者机构： 中南林业科技大学环境科学与工程学院

关键词： 农林高校;“环境监测”;教学改革

摘要： 该文基于农林高校环境专业的学科背景,结合＂环境监测＂课程的特点,从突出学科特色出发,在重视环境监测基本理论知识掌握、强调环境监测实践能力培养的＂环境监测＂课程教学上进行了一些改革探索,以期培养适应新时期生态环境保护需要的专业应用型人才。

语种： 中文

作者： Yang, Yuanxiu;Hu, Xinjiang*;Zhao, Yunlin;Cui, Lihua*;Huang, Zhujian;...

期刊： Journal of Colloid and Interface Science,2017年495:68-77 ISSN：0021-9797

通讯作者： Hu, Xinjiang;Cui, Lihua

作者机构： [Xu, Jiawen; Hu, Xinjiang; Cui, Lihua; Yang, Yuanxiu; Huang, Zhujian; Long, Jianliang; Wu, Cuiyu; Li, Wenwei; Deng, Jianbin] South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Hu, XJ; Cui, LH] S;South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China.

关键词： Adsorption isotherms;Biological materials;Decontamination;Dyes;Graphene;Ionic strength;Organic acids;pH effects;Sodium chloride;Solutions;Thioureas;Adsorption capacities;Aquatic environments;Chemical interactions;Graphene oxide nanosheets;Langmuir isotherm models;Tetracycline;Thermodynamic parameter;Thiourea dioxide;Adsorption;humic acid;oxide;tetracycline;thiourea;adsorption;adsorption kinetics;aqueous solution;Article;decomposition;desorption;enthalpy;entropy;hydrophobicity;hysteresis;infrared spectroscopy;ionic strength;liquid chromatography-mass spectrometry;magnetic field;molecular weight;pH;priority journal;reduction (chemistry);scanning electron microscopy;surface area;surface property;temperature sensitivity;thermodynamics;thermogravimetry;thermostability;transmission electron microscopy;waste management;X ray diffraction

摘要： Thiourea-dioxide–reduced magnetic graphene oxide (TDMGO) was successfully prepared as an efficient adsorbent for the removal of tetracycline (TC) from aqueous solutions via strong adsorptive interactions. The composite was characterized by SEM, TEM, EDS, TGA, FT-IR, XPS, XRD and VSM. The effects of variables such as the pH, TC concentration, and temperature were successfully analyzed. The kinetics and isothermal parameters were described well by pseudo-second-order and Langmuir isotherm models, respectively, and the maximum adsorption capacity (qm) of TDMGO for TC calculated from the Langmuir isotherm was 1233mg/g at 313K. The removal of TC onto TDMGO, as indicated by the thermodynamic parameters, was spontaneous and endothermic. The removal performance was slightly affected by the solution pH. The presence of NaCl in the solution facilitated TC adsorption, and the optimum adsorption capacity was obtained when the NaCl concentration was &gt;0.001M. The adsorption capacity decreased slightly with increasing humic acid concentration. In addition, the adsorbent could be regenerated and reused. Based on these results, TDMGO is a promising adsorbent for the efficient removal of TC antibiotics from aquatic environments for pollution treatment. © 2017 Elsevier Inc.

语种： 英文