所属单位：

环境与市政工程学院

发表刊物：

Chemosphere

关键字：

中文关键字：Cable oil contaminated soil;Chemical oxidation;Fen，英文关键字：Cable oil contaminated soil;Chemical oxidation;Fen

摘要：

Leaking cable insulating oil is a common source of soil contamination of high-voltage underground electricity cables in many European countries. In situ remediation of these contaminations is very difficult, due to the nature of the contamination and the high concentrations present. Chemical oxidation leads to partial removal of highly contaminated soil, therefore chemical oxidation was investigated and optimized aiming at a subsequent bioremediation treatment. Chemical oxidation of cable oil was studied with liquid H2O2 and solid CaO2 as well as permanganate at pH 1.8, 3.0 and 7.5. Liquid H2O2 most effectively removed cable oil at pH 7.5 (24%). At pH 7.5 poor oil removal of below 5% was observed with solid CaO2 and permanganate within 2 d contact time, whereas 18% and 29% was removed at pH 1.8, respectively. A prolonged contact time of 7 d showed an increased oil removal for permanganate to 19%, such improvement was not observed for CaO2.Liquid H2O2 treatment at pH 7.5 was most effective with a low acid use and was best fit to a subsequent bioremediation treatment. To further optimize in situ chemical oxidation with subsequent bioremediation the effect of the addition of the iron catalyst and a stepwise liquid H2O2 addition was performed. Optimization led to a maximum of 46% cable oil removal with 1469 mM of H2O2, and 6.98 mM Fe(II) chelated with citric acid (H2O2:FeSO4 = 210:1 (mol mol1). The optimum delivery method was a one step addition of the iron catalyst followed by step wise addition of H2O2.

备注：

徐金兰

合写作者：

TimGrotenhuis

第一作者：

徐金兰

论文类型：

期刊论文

卷号：

卷：

期号：

期：84

页面范围：

页：272-277

是否译文：

否

发表时间：

2011-03-01