核桃壳生物炭对土壤中镉的钝化修复

鲁秀国; 武今巾; 郑宇佳

doi:10.13205/j.hjgc.202011032

核桃壳生物炭对土壤中镉的钝化修复

doi: 10.13205/j.hjgc.202011032

华东交通大学土木建筑学院, 南昌 330013

基金项目:

国家自然科学基金（51768018）。

详细信息

作者简介:
鲁秀国(1964-),男,博士/教授,主要研究方向为水污染控制技术。149862562@qq.com

通讯作者:
武今巾(1992-),女,硕士研究生,主要研究方向为土壤重金属修复。18255352574@163.com

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- 文章访问数: 176
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- 被引次数: 0
出版历程
- 收稿日期: 2019-09-05
- 网络出版日期: 2021-04-23
- 刊出日期: 2021-04-23

PASSIVATION OF CADMIUM IN SOIL BY WALNUT SHELL BIOCHAR

School of Civil Engineering and Architecture, East China Jiao Tong University, Nanchang 330013, China

摘要

摘要: 通过室内模拟试验，研究了核桃壳生物炭（BC400、BC500、BC600）对人工Cd污染土壤（20 mg/kg）pH、Cd赋存形态分布的影响，并探究可能的修复机理。结果显示：经56 d修复后，与空白对照组相比，10%添加量的核桃壳生物炭BC400、BC500、BC600分别使土壤pH升高了1.07、1.31、1.38，弱酸可提取态Cd含量减少了17.02%、20.20%、24.53%，可还原态Cd含量减少了8.9%、19.1%、38.2%，可氧化态Cd含量增加了44.83%、78.45%、100%，残渣态Cd含量增加了66.03%、71.43%、89.21%。同时，土壤pH与土壤中弱酸可提取态Cd含量呈显著负相关（P<0.01）。综上，核桃壳生物炭能够对Cd污染土壤起到钝化修复作用。
- 核桃壳生物炭 /
- 土壤重金属 /
- 镉 /
- 修复
Abstract: The effects of walnut shell biochar (BC400, BC500, BC600) on pH and Cd morphology distribution in artificial Cd-contaminated soil (20 mg/kg) were studied through laboratory simulation experiments, and possible repair mechanisms were investigated. The results showed that after 56 days of remediation, compared with the blank control group, with 10% dosage of walnut shell biochar BC400, BC500 and BC600, the soil pH increased by 1.07, 1.31 and 1.38, the content of extractable Cd decreased by 17.02%, 20.20% and 24.53%, the reducible Cd content decreased by 8.9%, 19.1% and 38.2%, the oxidizable Cd content increased by 44.83%, 78.45% and 100%, and the residual Cd content increased by 66.03%, 71.43%, 89.21%. At the same time, there was a significant negative correlation between soil pH and soil extractable Cd content (P<0.01). Walnut shell biochar was proved to have the performance in passivating and repairing Cd-contaminated soil.
- walnut shell biochar /
- soil heavy metals /
- Cd /
- repair

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