Leaching remediation of heavy metal contaminated fluvio-aquatic soil with tea-saponin

Guangde Li, Zhongwen Zhang, Pei Jing, Nannan Zhou, Lin Li, Yufei Yuan, Miao Yu

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

For the purpose of investigating the possibility of tea-saponin on leaching remediation of heavy metal contaminated soil, the effect of tea-saponin on the removal of heavy metals from contaminated soil were analyzed by oscillation and soil leaching methods. The results showed that the concentrations of tea-saponin and the soil pH value had obvious effects on the removal efficiency of heavy metals. In the soil leaching experiment, 7% tea-saponin solution was used as flushing agents, the optimum conditions were as follows: pH value was 5.0±0.1, the ratio of soil to solution was 1:4. Then the removal efficiency could reach 6.74%, 42.38%, 13.07% and 8.75% for Pb, Cd, Zn and Cu, respectively. The removal efficiency of heavy metals was in a sequence of Cd>Zn>Cu>Pb. After soil leaching by tea-saponin, heavy metals in acid-soluble fraction and oxide fraction were effectively removed, and the environment risk of heavy metals was decreased. It also shows that tea-saponin has great potentiality in leaching remediation of heavy metal contaminated soil.

Original languageEnglish (US)
Pages (from-to)231-235
Number of pages5
JournalNongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Volume25
Issue number10
DOIs
StatePublished - Oct 1 2009

Keywords

  • Biosurfactant
  • Heavy metals
  • Leaching
  • Remediation
  • Soils
  • Tea-saponin

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