Chemical and Ecotoxicological Assessment of Multiple Heavy Metal-Contaminated Soil Treated by Phosphate Addition
Chemical and Ecotoxicological Assessment of Multiple Heavy Metal-Contaminated Soil Treated by Phosphate Addition
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添加磷酸盐处理多种重金属污染土壤的化学和生态毒理学评价
DOI：
10.1007/s11270-016-3100-z
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发表时间：
2016-10
期刊：
影响因子：
--
通讯作者：
Yao Jun
中科院分区：
文献类型：
--
作者：
Yuan Zhimin;Zhao Yue;Guo Zunwei;Yao Jun
本研究采用磷酸二氢钾（PDP）和磷酸二氢钾（DHP）两种不同的磷酸盐对中国河漳县长期污染土壤中的多种重金属（HMs）进行固定。采用化学法和生物法评价处理效果。采用社区参考局顺序萃取法（Community Bureau of Reference sequential extraction, BCR1）第一步预测HMs的迁移率和有效性，结果表明，当p /HMs （Pb、Cd和Zn）摩尔比为5:1时，PDP和DHP可显著降低BCR1提取的Pb （BCR1-Pb）浓度（p< 0.05），降幅分别为90.36%和86.19%。两种磷酸盐也分别使BCR1-Cd浓度降低36.78%和37.62%，但对Zn迁移率无明显影响。采用微量热法和双醋酸荧光素水解活性分析来评估HMs的毒性变化。磷肥处理土壤微生物活性有一定程度的提高，这可能是由于有机磷的毒性降低，以及添加磷肥的营养作用。还观察到对微生物活性的不利影响，这可能是由于磷酸盐处理增加了pH值。本研究为建立多种污染土壤的修复策略提供了基础信息。未来的研究应侧重于降低Zn的环境风险和降低磷酸盐处理对土壤微生物群落的不利pH效应。
In the present study, two different phosphates, namely potassium dihydrogen phosphate (PDP) and dipotassium hydrogen phosphate (DHP), were used to immobilize multiple heavy metals (HMs) in a long-term contaminated soil collected from Hezhang County (China). Chemical and biological methods were used to evaluate the treatment efficiency. The first step of the Community Bureau of Reference sequential extraction (BCR1) method was used to predict the mobility and availability of HMs and showed that PDP and DHP significantly decreased BCR1-extracted Pb (BCR1-Pb) concentration (p< 0.05) by 90.36 and 86.19 %, respectively, when they were applied at a P/HMs (sum of Pb, Cd, and Zn) molar ratio of 5:1. Two phosphates also reduced BCR1-Cd concentration by up to 36.78 and 37.62 %, respectively, but had no apparent effect on Zn mobility. Microcalorimetric and fluorescein diacetate hydrolysis activity analyses were used to assess the toxicity change of HMs. Soil microbial activity was increased to some extent in phosphate-treated soils, which may result from decreased HMs toxicity, as well as the nutritional effects of added phosphates. Adverse impacts on microbial activity were also observed, which may be due to the increased pH associated with phosphate treatment. This study provides baseline information for establishing remediation strategies for managing multiple HM-contaminated agricultural soils. Future studies should focus on reducing the environmental risk of Zn and decreasing the adverse pH effects of phosphate treatment on soil microbial communities.
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DOI：
10.1080/10937404.2013.825216
发表时间：
2013-08
期刊：
Journal of Toxicology and Environmental Health, Part B
影响因子：
--
作者：
K. Scheckel;G. Diamond;Michele Burgess;J. Klotzbach;M. Maddaloni;B. Miller;C. Partridge;S. Serda
通讯作者：
K. Scheckel;G. Diamond;Michele Burgess;J. Klotzbach;M. Maddaloni;B. Miller;C. Partridge;S. Serda
DOI：
10.4028/www.scientific.net/amr.356-360.1716
发表时间：
2011-10
期刊：
Advanced Materials Research
影响因子：
--
作者：
Yuan-Yuan Liang-Yuan;X. C. Wang;Xinde Cao;Ling Zhao
通讯作者：
Yuan-Yuan Liang-Yuan;X. C. Wang;Xinde Cao;Ling Zhao
DOI：
10.1007/s11270-006-9121-2
发表时间：
2006-07
期刊：
Water, Air, and Soil Pollution
影响因子：
--
作者：
Yuan-gen Yang;Cong-Qiang Liu;Wu Pan;Guoping Zhang;Wei Zhu
通讯作者：
Yuan-gen Yang;Cong-Qiang Liu;Wu Pan;Guoping Zhang;Wei Zhu
影响因子：
2.8
作者：
Hui Yan;Shengyuan Yuan;Manyuan Li;J. Xiao
通讯作者：
Hui Yan;Shengyuan Yuan;Manyuan Li;J. Xiao
影响因子：
5.8
作者：
L. Rodríguez;R. Gómez;V. Sánchez;J. Alonso-Azcárate
通讯作者：
L. Rodríguez;R. Gómez;V. Sánchez;J. Alonso-Azcárate