高盐有机废水电催化氧化过程有机氯代物生成势初探  

A Preliminary Study on Formation Potential of Organochlorine Substitutes during Electrocatalytic Oxidation of High Salt Organic Wastewater

作　　者：赵明阳 陈智能 马新宇 郭铭 许以昊 张雨晴[1] 刘熹 张健[1] Zhao Mingyang;Chen Zhineng;Ma Xinyu;Guo Ming;Xu Yihao;Zhang Yuqing;Liu Xi;Zhang Jian(Guangxi University,Nanning 530004,China;Guangxi Guangye Guitang Sugar Group Co.,Ltd.,Guigang 537138,China;Anhui Bossco Environmental Protection Technology Co.,Nanning 530007,China)

机构地区：[1]广西大学,广西南宁530004 [2]广西广业贵糖糖业集团有限公司,广西贵港537138 [3]安徽博世科环保科技股份有限公司,广西南宁530007

出　　处：《广东化工》2024年第10期64-67,32,共5页Guangdong Chemical Industry

基　　金：国家重点研发计划“绿色生物制造”重点专项“生物造纸技术及产业示范”项目(2022YFC2105505);国家自然科学基金项目(22208066)。

摘　　要：电催化氧化法适用于处理制浆造纸废水回用产生的膜浓缩液等高盐有机废水,但过程中Cl-等阴离子或将产生可吸附有机氯化物(AOX),存在二次污染。本研究以木素磺酸钠为模拟污染物,以NaCl和NaHCO_(3)为电解质,探究Pt-Ti和掺硼金刚石(BDD)两个电极体系下污染物转化、降解及AOX生成势。研究表明,Cl-促进木素磺酸钠的转化和脱色,但中间氯代产物阻碍TOC持续降低,且AOX最终为50~70mg/L。因此,电催化技术应用时,需实现AOX源头减量与末端处理,避免潜在风险。Electrocatalytic oxidation is suitable for treating high-salt organic wastewater such as membrane concentrate from pulp and paper wastewater reuse,but anions such as Cl-during electrocatalytic oxidation may produce adsorbable organic chlorides(AOX),and there are environmental risks of secondary pollution.In this study,sodium lignosulfonate was used as a simulated pollutant,and NaCl and NaHCO_(3)were used as electrolytes to investigate the transformation and degradation of the pollutant and its by-products organochlorine generation potential under the Pt-Ti system and boron doped diamond(BDD)system.Studies have shown that chloride ions facilitate the conversion and decolourisation of sodium lignosulphonate,but the difficulty of mineralisation of the intermediate chlorinated products hinders the sustained reduction of TOC,and the final concentration of adsorbable organohalogenides(AOX)is 50~70 mg/L.Therefore,when the application of electrocatalytic oxidation technology for high-salt organic wastewater is promoted,effective measures must be taken to achieve AOX source reduction and end treatment to avoid the potential risks.

关 键 词：高盐废水 电催化氧化 BDD电极 AOX 制浆造纸 

分 类 号：TS7[轻工技术与工程—制浆造纸工程]