Huang Ying, Yang Fei, Ai Luoyan, Feng Min, Wang Chi, Wang Zhaohui, Liu Jianshe
State Environmental Protection Engineering Centre for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.
State Environmental Protection Engineering Centre for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; International Centre for Balanced Land Use (ICBLU), The University of Newcastle, Callaghan, NSW, 2308, Australia.
Chemosphere. 2017 Jul;179:331-336. doi: 10.1016/j.chemosphere.2017.03.110. Epub 2017 Mar 30.
A large amount of chloride and ammonium ions were produced and released from industrial processes with non-biodegradable organic pollutants to affect efficiencies of advanced oxidation processes (AOPs). Here, the influences of chloride and ammonium ions on Co/peroxymonosulfate (Co/PMS) reaction system, a widely used AOPs to produce sulfate radicals, were investigated by examining the degradation efficiency of an azo dye (Acid Orange 7, AO7). The experimental results showed that a significant decrease in the degradation rate of AO7 was observed in the presence of NH, while a dual effect of chloride on AO7 bleaching appeared. The presence of NHCl was unfavorable for AO7 degradation at low concentration (<20 mM), whereas further addition of NHCl (>20 mM) apparently accelerated AO7 discoloration rate. The apparent effects of the two co-existing inorganic ions were determined by roles of the dominating ions at varied molar ratio of [NH]/[Cl]. The present study may have technical implications for the treatment of industrial wastewater containing diverse ions in practice.
工业生产过程中会产生并释放大量的氯离子和铵离子，这些离子与不可生物降解的有机污染物一起，会影响高级氧化工艺（AOPs）的效率。在此，通过考察偶氮染料（酸性橙7，AO7）的降解效率，研究了氯离子和铵离子对钴/过一硫酸盐（Co/PMS）反应体系（一种广泛用于产生硫酸根自由基的AOPs）的影响。实验结果表明，在铵离子存在的情况下，AO7的降解速率显著降低，而氯离子对AO7脱色呈现出双重影响。氯化铵的存在在低浓度（<20 mM）时不利于AO7的降解，而进一步添加氯化铵（>20 mM）则明显加速了AO7的褪色速率。两种共存无机离子的表观效应取决于在不同的[铵离子]/[氯离子]摩尔比下占主导地位的离子的作用。本研究可能对实际处理含有多种离子的工业废水具有技术指导意义。
