水触媒技术处理含低质量浓度苯酚焦化尾水性能及机理研究

Study on the Performance and Mechanism of Water Catalyst Technology in Treating Coking Tail Water with Low Mass Phenol Concentration

通过一种新型水触媒技术产生的自由基,处理含低质量浓度苯酚及其耐受细菌的焦化尾水,并探究苯酚的降解和微生物灭活机理.结果表明:在进水苯酚质量浓度为5 mg/L时,经水触媒处理60 min后,苯酚质量浓度降至检测限以下.荧光强度分析表明,苯酚氧化裂解分步进行,先产生有机中间产物,随后降解去除.pH、电导率和氧化还原电位(ORP)分析表明,在强氧化性条件下含不饱和键的苯酚被逐步氧化降解.同时,微生物的电子传递系统活性(ETSA)和膜通透性在3 min内均下降98%以上,表明水触媒产生的羟基自由基将苯酚氧化分解的同时可令体系中的微生物细胞结构破坏,导致细菌被灭活.水触媒技术展现出有效处理焦化尾水的潜力.

Hydroxyl radical which was produced by a novel water catalyst technology was adopted to treat coking wastewater with low phenol concentration and its resistant bacteria after biochemical processes.And then,the study explored the mechanism of phenol degradation and microbial inactivation.The results indicated that the phenol concentration decreased below the detection limit after water catalyst treatment of 60 min when the influent phenol concentration was 5 mg/L.Fluorescence intensity analysis showed that oxidative cracking of phenol was carried out step by step,and organic intermediates were produced at first and degraded subsequently.The pH,conductivity and Oxidation-Reduction Potential(ORP)analysis showed that phenol containing unsaturated bonds was gradually oxidized and degraded under strong oxidizing conditions.Meanwhile,the Electron Transport System Activity(ETSA)and membrane permeability of microorganisms both decreased by more than 98%within 3 min,indicating that hydroxyl radical produced by water catalyst can decompose phenol and destroy the microbial cell structure in the system thus causing the bacteria to be inactivated.Water catalyst technology showed great potential for the effective treatment of coking tail water.