Effects and mechanisms of mineral amendment on thallium mobility in highly contaminated soils

Juan Liu, Jiamin Ren, Yuchen Zhou, Daniel C.W. Tsang, Jingfen Lin, Wenhuan Yuan, Jin Wang, Meiling Yin, Yang Wu, Tangfu Xiao, Yongheng Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

Thallium (Tl) is an extremely toxic element, whose toxicity is even higher than mercury, arsenic, and cadmium. It is of great significance to hinder the migration and transfer of Tl from soils to the plants. A synthetic mineral amendment (SMA), mainly composed of different silicates, was evaluated for its effects on the transformation and retention of Tl in two typical highly Tl-contaminated soils from Southwest China. The results indicated that the addition of mineral amendment increased the soil of the pH by 0.46–2.13 units and distinctly reduced the content of active thallium in the soils. The extent of Tl reduction was related to the morphological characteristics of the original soil In particular, the application of the mineral amendment transformed 25.8–52.5% of the active Tl fractions in the soils to the residual fraction at 60 d. Adding mineral amendment to the soils can provide conditions to facilitate Tl to enter the silicate crystal lattice. The results of XPS evidenced that the proportion of Tl(I) in the soil was greatly reduced after adding the mineral amendment.

Original languageEnglish
Article number110251
JournalJournal of Environmental Management
Volume262
DOIs
Publication statusPublished - 15 May 2020

Keywords

  • Green/sustainable remediation
  • In-situ stabilization
  • Metal fractionation
  • Potentially toxic elements
  • Soil amendment

ASJC Scopus subject areas

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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