Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil
文献类型：SCI/SSCI论文
| 作者 | Liu H. T. |
| 发表日期 | 2016 |
| 关键词 | Copper Cadmium Degree of polymerization (DP) Fraction Organic matter Sludge life-cycle assessment sewage-sludge amended soils trace-metals speciation compost zinc lead solubility adsorption |
| 英文摘要 | Recycling of sludge as soil amendment poses certain risk of heavy metals contamination. This study investigated the relationship between organic matter in composted sludge and its heavy metals bioavailability over 7 years. Periodic monitoring indicated a gradual increase in organic matter degradation, accompanied by changing degrees of polymerization, i.e., ratio of humic acid (HA)/fulvic acid (FA) coupled with incremental exchangeable fraction of copper (Cu) in sludge, with a growing rate of 74.7%, rather than that in soil. However, cadmium (Cd) in composted sludge exhibited an independent manner. Linear-regression analysis revealed that the total proportion of the Cu active fraction (exchangeable plus carbonate bound) was better correlated with the degree of polymerization (DP) and humification ratio (HR) than the degradation ratio of organic matter. Overall, amount of uptaken Cu was more dependent on the humification degree of organic matter, especially the proportion of HA in humus. (C) 2016 Elsevier B.V. All rights reserved. |
| 出处 | Science of the Total Environment |
| 卷 | 566 |
| 页 | 8-14 |
| 语种 | 英语 |
| ISSN号 | 0048-9697 |
| DOI标识 | 10.1016/j.scitotenv.2016.05.023 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43104]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Liu H. T.. Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。