Stabilize lead and cadmium in contaminated soils using hydroxyapatite and potassium chloride

L. Wang, Y. Li, H. Li, X. Liao, B. Wei, B. Ye, F. Zhang, L. Yang, W. Wang, T. Krafft

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Combination of hydroxyapatite (HAP) and potassium chloride (KCl) was used to stabilize lead and cadmium in contaminated mining soils. Pot experiments of chilli (Capsicum annuum) and rape (Brassica rapachinensis) were used to evaluate the stabilization efficiency. The results were the following: (1) the optimal combination decreased the leachable lead by 83.3 and 97.27 %, and decreased leachable cadmium by 57.82 and 35.96% for soil HF1 and soil HF2, respectively; (2) the total lead and cadmium concentrations in both plants decreased 69 and 44 %, respectively; (3) The total lead and cadmium concentrations in the edible parts of both vegetables also decreased significantly. This study reflected that potassium chloride can improve the stabilization efficiency of hydroxyapatite, and the combination of hydroxyapatite and potassium chloride can be effectively used to remediate lead and cadmium contaminated mining soil.

Original languageEnglish
Pages (from-to)9041-9050
Number of pages10
JournalEnvironmental Monitoring and Assessment
Volume186
Issue number12
Early online date25 Sep 2014
DOIs
Publication statusPublished - Dec 2014

Keywords

  • Heavy metal
  • Toxicity characteristic leaching procedure
  • Pot experiment
  • Hydroxyapatite
  • Potassium chloride
  • HEAVY-METALS
  • ZINC CONCENTRATIONS
  • AQUEOUS-SOLUTION
  • IMMOBILIZATION
  • CHINA
  • ZN
  • PB
  • CD
  • REMOVAL
  • CU

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