【摘 要】
：
选用掺硼金刚石(BDD)电极作为阳极、不锈钢电极阴极,对酸性橙Ⅱ染料废水进行电化学降解研究.讨论了电解质、电流密度、溶液pH、初始浓度等工艺参数对酸性橙Ⅱ降解速率的影响,
【机 构】
：
太原理工大学水利科学与工程学院,山西省水资源研究所
论文部分内容阅读
选用掺硼金刚石(BDD)电极作为阳极、不锈钢电极阴极,对酸性橙Ⅱ染料废水进行电化学降解研究.讨论了电解质、电流密度、溶液pH、初始浓度等工艺参数对酸性橙Ⅱ降解速率的影响,对降解过程中染料分子的矿化进行了监测分析,并且考察了不同初始浓度下电解过程中的表观电流效率.结果表明,溶液中存在氯离子有助于酸性橙Ⅱ的快速降解；以硫酸钠为电解质时,高电流密度和碱性pH环境有助于提高酸性橙Ⅱ降解速率.电化学降解过程中,BDD电极可以迅速的破坏染料分子显色基团使其褪色,并无选择性的矿化各种中间产物.随着电解反应的持续进行,表观电流效率逐渐降低；污染物浓度越高,电解过程中电流效率越高.在初始浓度50 mg/L、氯化钠添加量0.01 mol/L、电流密度10 mA/cm2、初始pH 6.5左右的条件下,酸性橙Ⅱ在30 min内被完全降解,120 min后TOC去除率达到96％.
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