Bioremediation of Heavy Metal Cd, Pd Contaminated Soil by Enzymes and Tea Saponin Hybrid Liquid

LIN Weisheng; SHI Xiaocong; LIAO Sulan; XU Haihuang

doi:10.13961/j.cnki.stbctb.2016.05.010

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Bioremediation of Heavy Metal Cd, Pd Contaminated Soil by Enzymes and Tea Saponin Hybrid Liquid

- Bioremediation of Heavy Metal Cd, Pd Contaminated Soil by Enzymes and Tea Saponin Hybrid Liquid
- Bulletin of Soiland Water Conservation Vol. 36, Issue 5, Pages: 13-19(2016)
- 作者机构：
  
  福建省生态产业绿色技术重点实验室, 武夷学院生态与资源工程学院, 福建武夷山,354300
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.05.010
  CLC：
- Published：2016
- 稿件说明：
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LIN Weisheng, SHI Xiaocong, LIAO Sulan, et al. Bioremediation of Heavy Metal Cd, Pd Contaminated Soil by Enzymes and Tea Saponin Hybrid Liquid[J]. Bulletin of Soiland Water Conservation, 2016, 36(5): 13-19.
DOI：

LIN Weisheng, SHI Xiaocong, LIAO Sulan, et al. Bioremediation of Heavy Metal Cd, Pd Contaminated Soil by Enzymes and Tea Saponin Hybrid Liquid[J]. Bulletin of Soiland Water Conservation, 2016, 36(5): 13-19. DOI： 10.13961/j.cnki.stbctb.2016.05.010.

摘要

[目的] 评价α-淀粉酶与茶皂素对污染土壤中的Cd，Pb洗脱效果，为重金属污染土壤的修复提供更准确的科学依据。[方法] 以重金属Cd，Pb污染的耕作层土壤为研究对象，利用α-淀粉酶和茶皂素复合淋洗对Cd，Pb污染土壤进行生态修复，并测定土壤淋洗前后Cd，Pb形态的变化。[结果] 在反应时间12 h，pH 4.0，反应温度30℃，茶皂素溶液和酶溶液配比4：1条件下，Cd，Pb去除率分别为88.87%，43.97%。通过对修复前后重金属的形态分析，发现酸提取态、可还原物态的重金属较容易去除，淋洗后土壤中Cd和Pb均达到土壤环境质量Ⅱ级标准。[结论] α-淀粉酶和茶皂素组合对土壤中Cd，Pb有明显的去除效果，起到协同、增强作用。表明α-淀粉酶和茶皂素组合在生态修复重金属污染的土壤方面具有一定的应用前景。

Abstract

[Objective] The objective of this study is to evaluate the elution effect of α-amylase and tea saponin hybrid liquid on heavy metals such as Cd

Pd in soil

in order to provide a more accurate scientific basis for remediation of heavy metal contaminated soil.[Methods] Cd

Pd contaminated topsoil were selected as the study object

enzymes and tea saponin hybrid liquid was used to remediate the heavy metal contaminated soil. The changes of Cd

Pb before and after leaching were investigated.[Results] The removal efficiency of Cd and Pd were 88.87% and 43.97%

respectively. When the reaction time was 12 hours

pH value was 4.0

the reaction temperature was 30℃ and the ratio of tea saponin solution and enzymes solution was 4:1. The analysis of heavy metals before and after leaching showed that acid extractable and reducible metals were easier to remove. The content of Cd and Pd in soil after leaching reached up to the grade Ⅱ standard of soil environmental quality.[Conclusion] There is a synergistic enhancement effect between tea saponin and enzymes solution. The combination of enzymes and tea saponin has great effects on the removal of heavy metals from contaminated soil. The combinations of α-amylase and tea saponin have bright prospects in bioremediation of heavy metals in contaminated soil.

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references

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