Particle Size Fraction and Arsenic Partitioning in Tailings and Sediments in Lianhuashan Tungsten Mine, Southern China

Abstract:

A series of tailings and sediments samples were collected from Linahuashan tungsten mining area. Particle composition, arsenic concentrations and arsenic speciation distribution in the tailings and sediments were investigated. The proportion of large particle (> 170 μm) in the tailings varied from 37% to 50%. Arsenic (As) concentrations in the tailings ranged from1889 mg·kg^-1 to 3135 mg·kg^-1. The sediments upstream were similar to those in the tailings in particle composition, As concentrations and speciation distribution. The sediments in the middle or lower reaches of the stream contained finer texture and lower As concentrations than the tailings. Compared to the tailings, Acid waste water with a lot of tailings particle enter the stream. Most of larger particle in acid waste water settled upstream, and smaller particle and soluble As precipitated in the middle or lower reaches of the stream. Smaller particle fraction contained higher percentages of Fe-As, Ca-As and Al-As, while larger particle fraction contained higher percentages of FeOc-As and Res-As.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 365-369
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.365
• Online since: February 2014
• Authors: Wen Jie Lin
• Keywords: Abandoned Mine Arsenic, Particle Size, Sediment, Speciation Distribution, Tailings

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