Modified natural diatomite and its enhanced immobilization of lead, copper and cadmium in simulated contaminated soils
文献类型： 外文期刊
作者： Ye, Xinxin 1 ; Kang, Shenghong 1 ; Wang, Huimin 1 ; Li, Hongying 2 ; Zhang, Yunxia 1 ; Wang, Guozhong 1 ; Zhao, Huijun 1 ;
作者机构： 1.Chinese Acad Sci, Inst Solid State Phys, Ctr Environm & Energy Nanomat, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Anhui Acad Agr Sci, Inst Soil & Fertilizer, Hefei 230031, Peoples R China
3.Griffith Univ, Ctr Clean Environm & Energy, Brisbane, Qld 4222, Australia
关键词： PTEs;Natural diatomite;Modified diatomite;Soil remediation
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： Natural diatomite was modified through facile acid treatment and ultrasonication, which increased its electronegativity, and the pore volume and surface area achieved to 0.211 cm(3) g(-1) and 76.9 m(2) g(-1) respectively. Modified diatomite was investigated to immobilize the potential toxic elements (PTEs) of Pb, Cu and Cd in simulated contaminated soil comparing to natural diatomite. When incubated with contaminated soils at rates of 2.5% and 5.0% by weight for 90 days, modified diatomite was more effective in immobilizing Pb, Cu and Cd than natural diatomite. After treated with 5.0% modified diatomite for 90 days, the contaminated soils showed 69.7%, 49.7% and 23.7% reductions in Pb, Cu and Cd concentrations after 0.01 M CaCl2 extraction, respectively. The concentrations of Pb, Cu and Cd were reduced by 66.7%, 47.2% and 33.1% in the leaching procedure, respectively. The surface complexation played an important role in the immobilization of PTEs in soils. The decreased extractable metal content of soil was accompanied by improved microbial activity which significantly increased (P < 0.05) in 5.0% modified diatomite-amended soils. These results suggested that modified diatomite with micro/nanostructured characteristics increased the immobilization of PTEs in contaminated soil and had great potential as green and low-cost amendments. (C) 2015 Elsevier B.V. All rights reserved.
- 相关文献
作者其他论文 更多>>
-
Mitigating nitrate leaching in cropland by enhancing microbial nitrate transformation through the addition of liquid biogas slurry
作者：Sun, Ruibo;Ding, Jingkui;Li, Kaixuan;Ye, Xinxin;Li, Hongying;Wang, Xiaogai;Li, Wenyan;Sun, Shiyou
关键词：Nitrate leaching; Microbial nitrate transformation; Biogas slurry; Denitrification
-
Combined nitrogen fertilizer and wheat straw increases the cadmium phytoextraction efficiency of Tagetes patula
作者：Ye, Xinxin;Hu, Hongxiang;Xiong, Qizhong;Gao, Hongjian;Li, Hongying
关键词：Cadmium; Hyperaccumulation; N fertilizer; Wheat straw; Tagetes patula
-
The influence of a year-round tillage and residue management model on soil N fractions in a wheat-maize cropping system in central China
作者：Ye, Xinxin;Chai, Rushan;Li, Junli;Ma, Chao;Xiong, Qizhong;Gao, Hongjian;Ye, Yin;Li, Hongying
关键词：
-
Influence of aspartic acid and lysine on the uptake of gold nanoparticles in rice
作者：Ye, Xinxin;Wang, Qingyun;Chai, Rushan;Ma, Chao;Gao, Hongjian;Li, Hongying;Mao, Jingdong
关键词：Au nanoparticles; Rice; Aspartic acid; Lysine; Uptake; Root exudate
-
Amendment damages the function of continuous flooding in decreasing Cd and Pb uptake by rice in acid paddy soil
作者：Ye, Xinxin;Zhang, Ligan;Chai, Rushan;Tu, Renfeng;Gao, Hongjian;Li, Hongying;Zhang, Ligan
关键词：Phosphate amendment;Water management;Rice;Cd and Pb;Combined remediation
-
Micro/nanostructured hydroxyapatite structurally enhances the immobilization for Cu and Cd in contaminated soil
作者：Dong, Anle;Ye, Xinxin;Zhang, Yunxia;Wang, Guozhong;Dong, Anle;Li, Hongying
关键词：Cd and Cu;Hydroxyapatite;Micro/nanostructure;Soil remediation
-
The bioaccumulation of Cd in rice grains in paddy soils as affected and predicted by soil properties
作者：Ye, Xinxin;Wu, Liang;Sun, Bo;Ye, Xinxin;Li, Hongying;Ma, Yibing;Wu, Liang
关键词：Bioaccumulation;Cd;Paddy soil;Threshold
