Recycling of Chemical Eluent and Soil Improvement After Leaching

被引：0
作者：
Mingli Jiang
Shengxiao Wang
Mengyu Chen
Huilong Lu
Yahua Chen
Liang Shi
机构：
[1] Nanjing Agricultural University,College of Life Sciences
[2] Nanjing Agricultural University,Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource
[3] Nanjing Agricultural University,National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation
来源：
Bulletin of Environmental Contamination and Toxicology | 2020年 / 104卷
关键词：
Leaching; Pb–Zn contaminated soil; Recycled EDTA eluent; Soil quality;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Ethylenediaminetetraacetic acid disodium salt (EDTA) was selected among various eluents due to its highest removal efficiency for lead (Pb) (43.7%) and zinc (Zn) (57.1%) leaching from Pb–Zn contaminated soil by soil column experiment. Compared with newly prepared EDTA eluent, using recycled EDTA eluent can still leaching down 71.1% of Pb and 63.2% of Zn respectively, which showed the reusable benefits of recycled EDTA eluent. After soils were leached by EDTA, soil quality decline, such as reducing of urease, catalase, invertase activities and microorganism numbers. However, adding 5% nutrition soil or earthworm fertilizer can significantly improve the quality of EDTA leached soil, and promote growth of peas and ryegrass compared with EDTA treatments. Overall, the improvement of EDTA leached soil by adding nutrition soil or earthworm fertilizer is important, and recycled EDTA eluent can recycle and re-use for Pb–Zn contaminated soil remediation.
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页码：128 / 133
页数：5
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