Arsenic removal from mine waters with sorption techniques

Tommi Kaartinen, Jutta Laine-Ylijoki, Sarita Ahoranta, Tero Korhonen, Raisa Neitola

    Research output: Contribution to journalArticleScientificpeer-review

    9 Citations (Scopus)

    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 languageEnglish
    Pages (from-to)199-208
    Number of pages10
    JournalMine Water and the Environment
    Volume36
    Issue number2
    DOIs
    Publication statusPublished - 1 Jun 2017
    MoE publication typeA1 Journal article-refereed

    Keywords

    • industrial by-products
    • iron-based sorption materials
    • batch tests
    • sorption capacity
    • column tests

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