大豆脲酶免CaCl2固化修复铅、锌污染土的稳定性
Stability of lead-zinc contaminated soil cured by soybean urease without CaCl2
- 土木与环境工程学报 2026年48卷第2期 页码：8-18
- 作者机构：
1.河南大学 土木建筑学院，河南 开封 475004
2.中国建筑第八工程局有限公司，上海 200122
3.河南省基本建设科学实验研究院有限公司，郑州 450016
4.河南卓越建设工程有限公司，郑州 450016
- 作者简介：
吴振宇（1998- ），男，主要从事环境岩土工程研究，E-mail：WYu1998@henu.edu.cn。
徐向春（通信作者），男，博士，E-mail：xxc_geo@foxmail.com。
- 基金信息：河南省自然科学基金(232300420435);黄河水利委员会黄河水利科学研究院开放基金(LYRCER202102)
DOI：10.11835/j.issn.2096-6717.2024.014
中图分类号： TU411.3收稿：2023-11-20，
纸质出版：2026-04-25
- 稿件说明：
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吴振宇,段超龙,徐向春等.大豆脲酶免CaCl2固化修复铅、锌污染土的稳定性[J].土木与环境工程学报,2026,48(02):8-18.
WU Zhenyu,DUAN Chaolong,XU Xiangchun,et al.Stability of lead-zinc contaminated soil cured by soybean urease without CaCl2[J].Journal of Civil and Environmental Engineering,2026,48(02):8-18.
吴振宇,段超龙,徐向春等.大豆脲酶免CaCl2固化修复铅、锌污染土的稳定性[J].土木与环境工程学报,2026,48(02):8-18. DOI： 10.11835/j.issn.2096-6717.2024.014.
WU Zhenyu,DUAN Chaolong,XU Xiangchun,et al.Stability of lead-zinc contaminated soil cured by soybean urease without CaCl2[J].Journal of Civil and Environmental Engineering,2026,48(02):8-18. DOI： 10.11835/j.issn.2096-6717.2024.014.
摘要
为了研究在不过大提高耕植土强度的前提下大豆脲酶免CaCl
2
固化处理对铅、锌污染土修复后长期稳定性的影响，通过pH值、重金属离子浸出率和土壤重金属赋存形态等指标，探讨修复后污染土在干湿循环、冻融循环和酸雨淋滤等复杂环境下的长期稳定性。结果表明，与EICP固化处理的铅、锌污染土相比，经大豆脲酶免CaCl
2
固化处理后土体表面强度明显降低，渗透系数有所提高。随着干湿循环和冻融循环次数的增加，土体pH值下降缓慢但仍呈弱碱性，重金属浸出率的增长趋势变缓。在酸雨作用下，随着酸雨溶液pH值的增大，淋出液中Pb
2+
、Zn
2+
含量逐渐减少，且均满足规范对危险废弃物的处置要求。此外，不同类型的酸雨对修复土的影响也有所不同，在硫酸型酸雨作用下，修复土的稳定性优于硝酸型酸雨。
Abstract
In order to examine the effect of soybean urease without CaCl
2
curing treatment on the long-term stability of lead-zinc contaminated soil after restoration without greatly improving the strength of cultivated soil
the long-term stability of contaminated soil after restoration under the complex environment of dry-wet cycles
freeze-thaw cycles and acid rain leaching was discussed by using pH value
heavy metal ion leaching rate and soil heavy metal occurrence form
respectively. The results show that the surf
ace strength of the soil cured by soybean urease without CaCl
2
is significantly reduced and the permeability is improved compared with that cured by EICP. With the increase of dry-wet cycles and freeze-thaw cycles
soil pH value decreases slowly but remains weakly alkaline
and the increasing trend of heavy metal leaching rate slows down. Under the action of acid rain
with the increase of pH value of acid rain solution
the contents of Pb
2+
and Zn
2+
in leached solution gradually decrease
and both meet the requirements of hazardous waste disposal regulations. In addition
different types of acid rain have different effects on repaired soil
and its stability under sulfuric acid rain is better than that under nitric acid rain.
关键词
Keywords
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