| 生物炭老化对土壤重金属的固定效应研究进展 |
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| 作者姓名： | 黄晓雅 李莲芳 朱昌雄 |
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| 作者单位： | 中国农业科学院农业环境与可持续发展研究所,北京 100081;农业农村部农业环境重点实验室,北京 100081 |
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| 基金项目： | 国家重点研发计划项目（2020YFC1806401）；国家基础性工作专项（2015FY111330） |
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| 摘 要： | 生物炭作为一种环境友好、稳定性强的钝化材料,因其巨大的比表面积、丰富的含氧官能团等特点成为目前修复重金属污染土壤的有效材料.然而,生物炭(改性)对重金属的固定能力及效应除受本身特性影响外,还受到材料老化过程及环境条件等因素的影响,导致生物炭(改性)固定土壤重金属的稳定性、持久性发生变化,从而使得生物炭材料的钝化性能受到影响.本文重点综述了当前生物炭(改性)及其老化产物对土壤重金属固定效应的相关进展,分析了生物炭及其老化产物固定重金属的相关机制及影响因素,并对生物炭及其老化过程可能带来的土壤重金属固定长效性影响,以及今后以此为基础的钝化技术的研发趋势进行了展望,以期为利用生物炭钝化修复重金属污染土壤及相关辅助技术研发提供支撑.
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| 关 键 词： | 重金属 生物炭 老化 pH值 含氧官能团 |
| 收稿时间： | 2020/10/23 0:00:00 |
Research progress on the fixation effect of biochar aging on heavy metals in soil |
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| Authors: | HUANG Xiaoy LI Lianfang ZHU Changxiong |
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| Institution: | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China |
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| Abstract: | As an environment- friendly and stable passivation material, biochar has become effective for remediating heavy metals in soil due to its large specific surface area and abundant oxygen-containing functional groups. However, in addition to its own characteristics, the immobilization capacity and fixation effect of biochar(modified)on heavy metals are affected by the aging process of biochar and surrounding environmental conditions, which lead to changes in the stability and persistence of biochar(modified)to immobilize heavy metals in soil, thus affecting the passivation performance of biochar. In this study, the current progress of biochar(modified)and its aging products on the immobilization of heavy metals in soil was reviewed. The mechanisms and factors of biochar and its aging products influencing the immobilization of heavy metals in soil were analyzed along with the possible long-term effects of biochar and its aging process. Moreover, future research and development trends of the immobilization technology of biochar are prospected to meet the needs of remediation and related auxiliary technology of soil contaminated with heavy metals by utilization of biochar amendments. |
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| Keywords: | heavy metals biochar aging pH value oxygen-containing functional groups |
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