Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2010;45(4):464-70. doi: 10.1080/10934520903538608.
In this study, bimetallic Pd/Fe(0) particles were synthesized and employed to reduce chloroform in aqueous solution. The investigation emphasized on the effects of some key reaction parameters including Pd/Fe(0) dosage, pH, oxidation-reduction potential (ORP) and presence of anions on the reductive dechlorination reaction. The experimental results showed that high Pd/Fe(0) dosage, low initial pH and low ORP benefited the reductive dechlorination of chloroform. The ORP values in the aqueous chloroform solution bubbled with different gases of N(2), O(2) and air varied significantly and the efficiency of chloroform degradation under different atmospheres followed an order from high to low as N(2) > air > O(2). The experiments also demonstrated that SO(4)(2 -) and NO(3)(-) ions inhibited the dechlorination reaction significantly, while H(2)PO(4)(-) ion had no significant influence on the dechlorination.
在这项研究中，合成了双金属 Pd/Fe(0) 颗粒，并将其用于还原水溶液中的三氯甲烷。研究重点考察了一些关键反应参数对还原脱氯反应的影响，包括 Pd/Fe(0) 用量、pH 值、氧化还原电位 (ORP) 和阴离子的存在。实验结果表明，高 Pd/Fe(0) 用量、低初始 pH 值和低 ORP 有利于三氯甲烷的还原脱氯。用不同气体（N(2)、O(2) 和空气）鼓泡的水溶液中三氯甲烷的 ORP 值变化显著，不同气氛下三氯甲烷降解的效率顺序为 N(2) > 空气 > O(2)。实验还表明，SO(4)(2 -) 和 NO(3)(-) 离子对脱氯反应有明显的抑制作用，而 H(2)PO(4)(-) 离子对脱氯没有明显影响。
