作者机构：
[高子翔; 周航; 辜娇峰; 陈立伟; 杜文琪; 徐珺; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[杨文弢] College of Bioscience and Technology, Hunan Agricultural University, Changsha;410128, China;[高子翔; 周航; 辜娇峰; 陈立伟; 杜文琪; 徐珺; 廖柏寒] 410004, China
作者机构：
[陈立伟; 杨文弢; 辜娇峰; 周航; 高子翔; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[陈立伟; 杨文弢; 辜娇峰; 周航; 高子翔; 廖柏寒] 410004, China
摘要：
The objectives of the present study were to investigate the mitigation of lead (Pb), cadmium (Cd), and arsenic (As) in a multi-metal contaminated soil and their accumulation in rice plants (Oryza sativa L., cv II You 93) using a combined amendment (CMF, calcium carbonate + metakaolin + fused calcium-magnesium phosphate fertilizer). The results showed that application of CMF was effective in reducing the acid-extractable concentrations of soil Pb and Cd. The exchangeable concentrations of soil As showed an initial decrease followed by a gradual increase. The application of 0.2% CMF notably reduced the concentrations of Pb, Cd, and As in brown rice by 46.5%, 43.6%, and 32.0%, respectively. The concentration of As in brown rice was 0.179mgkg(-1) at 0.2% CMF, which met the maximum levels of contaminants in foods of China (MLs) (the ML of Pb, Cd, and As is 0.2mg kg(-1) according to the China national standard GB 2762-2012). At 1.6% CMF, the concentrations of Pb and Cd in brown rice were 0.002 and 0.185mg kg(-1), respectively, i.e., reductions of 99.6% and 74.1%, and these values also fell within the MLs.
作者机构：
[田桃; Zeng, Min; 周航; 徐珺; 杨文弢; 辜娇峰; 邹佳玲; 张平; 彭佩钦; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[田桃; Zeng, Min; 周航; 徐珺; 杨文弢; 辜娇峰; 邹佳玲; 张平; 彭佩钦; 廖柏寒] 410004, China
作者机构：
[朱维; 彭佩钦; 曹玮; 邓贵友; 辜娇峰; 邱琼瑶; 廖柏寒; 周航; 杨文弢] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Liao, B.] C;College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[彭佩钦; 辜娇峰; 杨文弢; Zen M.; 周航; Zhou H.; 廖柏寒] 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：
复合改良剂;镉砷;形态分析;富集与转运;水稻;土壤
摘要：
为治理镉砷污染农田土壤,选取湘南某矿区镉砷复合污染稻田土壤,以水稻盆栽实验研究了复合改良剂HZB (羟基磷灰石+沸石+改性秸秆炭)对土壤中镉(Cd)、砷(As)赋存形态以及水稻累积转运Cd和As的影响。结果表明,施用HZB能提高土壤pH 0.19~0.79个单位,阳离子交换量增加22.1% ~ 60.4%;施用HZB使活性较大的酸提取态Cd含量降低了6.5% ~ 22.9%,促进了Cd向难溶态的转变,可使有机结合态Cd增加2.5% ~ 56.5%;施用HZB促进活性As向难溶型的钙型As转化,钙型As含量增加2.8% ~ 53.3%,也可使交换态As含量降低7.0% ~ 39.5%,但当施用量超过4.0 g kg~(-1)时则会增加交换态As含量。水稻根系对Cd的富集系数在0.65 ~ 1.21之间,对As的富集系数在0.033 ~ 0.049之间,富集Cd的能力大于As;谷壳对Cd的转运能力最大,而根系对As的转运能力最大;施用HZB有降低水稻根系富集Cd和As的能力。施用0.5 ~ 2.0 g kg~(-1)的HZB能降低水稻地上各部位中Cd和As含量;在2 g kg~(-1)施用水平,水稻糙米中Cd和As含量均低于0.2mg kg~(-1),达到国家食品污染物限量标准。
作者机构：
[朱维; 彭佩钦; Zeng, Min; 辜娇峰; 廖柏寒; 吴玉俊; 邹紫今; 周航] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, China
通讯机构：
College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[辜娇峰; 周航; 张平; 彭佩钦; 廖柏寒] College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[杨文弢] College of Bioscience and Technology, Hunan Agricultural University, Changsha;410128, China;[辜娇峰; 周航; 张平; 彭佩钦; 廖柏寒] 410004, China
作者机构：
[吴玉俊; 周航; 杨文弢; 邹紫今; 朱维; 辜娇峰; 彭佩钦; 张平; Zeng, Min; 廖柏寒] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[吴玉俊; 周航; 杨文弢; 邹紫今; 朱维; 辜娇峰; 彭佩钦; 张平; Zeng, Min; 廖柏寒] 410004, China
摘要：
The objectives of the present study were to investigate heavy metal accumulation in 22 vegetable species and to assess the human health risks of vegetable consumption. Six vegetable types were cultivated on farmland contaminated with heavy metals (Pb, Cd, Cu, Zn, and As). The target hazard quotient (THQ) method was used to assess the human health risks posed by heavy metals through vegetable consumption. Clear differences were found in the concentrations of heavy metals in edible parts of the different vegetables. The concentrations of heavy metals decreased in the sequence as leafy vegetables > stalk vegetables/root vegetables/solanaceous vegetables > legume vegetables/melon vegetables. The ability of leafy vegetables to uptake and accumulate heavy metals was the highest, and that of melon vegetables was the lowest. This indicated that the low accumulators (melon vegetables) were suitable for being planted on contaminated soil, while the high accumulators (leafy vegetables) were unsuitable. In Shizhuyuan area, China, the total THQ values of adults and children through consumption of vegetables were 4.12 and 5.41, respectively, suggesting that the residents may be facing health risks due to vegetable consumption, and that children were vulnerable to the adverse effects of heavy metal ingestion.
作者机构：
[邹紫今; 彭佩钦; 廖柏寒; 吴玉俊; 周航; 朱维; 杨文弢; Zeng M.; 辜娇峰] 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, Central South University of Forestry and Technology, Changsha, China
