Abstract
Potential low-cost sorption materials (mostly industrial
by-products) were screened for removal of arsenic from
mine effluent water. First, the maximum adsorption
capacities were determined in batch tests with various
liquid to solid ratios. The highest arsenic sorption
capacity, 46 mg As/g of sorption material, was measured
for cast iron chips. The most promising materials were
also studied in batch tests that assessed the reaction
kinetics and in kinetic column tests for their behavior
in a filter or reactive barrier application. The column
tests revealed the cast iron chips caused clogging in the
percolation column when operating with real mine water. A
commercial ferric oxi-hydroxide sorption material
developed for As removal for drinking water showed good
As removal in the column tests. Around 10,000 bed volumes
of mine process water containing 2 mg/L of arsenic was
treated with this material, and treated water
concentrations ranged between 0 and 0.05 mg/L before
breakthrough. The measured adsorption capacity for the
commercial ferric oxi-hydroxide sorption material was 8.3
mg As/g.
| Original language | English |
|---|---|
| Pages (from-to) | 199-208 |
| Journal | Mine Water and the Environment |
| Volume | 36 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jun 2017 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- industrial by-products
- iron-based sorption materials
- batch tests
- sorption capacity
- column tests