Efficient immobilization of toxic heavy metals in multi-contaminated agricultural soils by amino-functionalized hydrochar: Performance, plant responses and immobilization mechanisms
文献类型：期刊论文
| 作者 | Xia, Yu ; Luo, Hainan; Li, Dong; Chen, Zeliang; Yang, Shengshu; Liu, Zhengang; Yang, Tianxue; Gai, Chao
|
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020-06 |
| 卷号 | 261页码:1-11 |
| 关键词 | Soil remediation Amino-functionalized hydrochar Paddy rice Organic matter Surface complexation |
| ISSN号 | 0269-7491 |
| 英文摘要 | A novel amino-functionalized hydrochar material (referred to NH2-HCs) was prepared and used as the soil amendment to immobilize multi-contaminated soils for the first time. The results showed that the application of NH2-HCs significantly improved (P < 0.05) soil properties (i.e., pH value, cation exchange capacity and organic content). By introduction of NH2-HCs, the contaminated soil showed the highest value of 96.2%, 52.2% and 15.5% reductions in Cu, Pb and Cd bioavailable concentrations and the leaching toxicity of Cu, Pb and Cd were remarkably reduced by 98.1%, 31.3% and 30.4%, respectively. Most of exchangeable Cu, Pb and Cd reduced were transformed into its less available forms of oxidizable and residual fractions. Potential ecological risk assessment indicated that the element Cd accounted for the most of total risks in NH2-HCs amended soils. The mechanism study indicated that surface complexation, chemical chelating and cation-pi interaction of NH2-HCs played a vital role in the immobilization of heavy metals. Pot experiments further verified that the application of NH2-HCs significantly improved plant growth and reduced metal accumulations. The present study offered a novel approach to prepare amino-functionalized hydrochars with great potential as the green and alternative amendments for efficiently immobilizing heavy metals in multi-contaminated soil. (C) 2020 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44565]  |
| 专题 | 生态环境研究中心_固体废弃物处理与资源化实验室 |
| 推荐引用方式 GB/T 7714 | Xia, Yu,Luo, Hainan,Li, Dong,et al. Efficient immobilization of toxic heavy metals in multi-contaminated agricultural soils by amino-functionalized hydrochar: Performance, plant responses and immobilization mechanisms[J]. ENVIRONMENTAL POLLUTION,2020,261:1-11. |
| APA | Xia, Yu.,Luo, Hainan.,Li, Dong.,Chen, Zeliang.,Yang, Shengshu.,...&Gai, Chao.(2020).Efficient immobilization of toxic heavy metals in multi-contaminated agricultural soils by amino-functionalized hydrochar: Performance, plant responses and immobilization mechanisms.ENVIRONMENTAL POLLUTION,261,1-11. |
| MLA | Xia, Yu,et al."Efficient immobilization of toxic heavy metals in multi-contaminated agricultural soils by amino-functionalized hydrochar: Performance, plant responses and immobilization mechanisms".ENVIRONMENTAL POLLUTION 261(2020):1-11. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。