【摘要】 工业废水中硫氰酸盐是一种危害环境和人类健康的有毒物质，因难以降解等特性增加了废水处理难度。文章通过将微电解与芬顿耦合，并优化工艺参数，实现硫氰酸盐（SCN^-）废水的高效处理。在微电解曝气量为1.5 L/min条件下，将pH值控制在3～4之间反应90 min，之后向出水中加入8 mL/L 30%H₂O₂溶液，磁力搅拌反应30 min，可使SCN^-浓度从508.3 mg/L降低至16.8 mg/L，去除率达到96.7%，继续反应至60 min可完全去除SCN^-。反应机理为：微电解产生的少量·OH将部分Fe²⁺氧化为Fe³⁺，与SCN^-形成配合物Fe（NCS）₆^3-，经氧化形成微量CN^-，进一步矿化为NH₃和CO₂并挥发。芬顿阶段生成的大量·OH，将剩余CN^-及SCN^-全部氧化为CNO^-，最终形成NO₃^-和N₂。该研究揭示了铁碳芬顿处理硫氰酸根的降解机制，为含硫氰酸盐废水提供了一种新的处理方法。更多还原

【Abstract】 Thiocyanate in industrial wastewater is a toxic substance that jeopardizes the environment and human health, and its characteristics such as difficult degradation increase the difficulty of wastewater treatment. In the article, the efficient pretreatment of thiocyanate（SCN^-） wastewater was achieved by coupling iron-carbon micro-electrolysis with Fenton oxidation and optimizing the process parameters. Through the methods of one-factor experiment and kinetic analysis, it was determined that the SCN^-concentration could be reduced from 508.3 mg/L to 16.8 mg/L by controlling the pH of the reaction system between 3 and 4 for 90 min at the aeration of iron-carbon micro-electrolysis of 1.5 L/min, removing the water at the end of the reaction and adding 8 m L/L of 30% H₂O₂ solution, and magnetically stirring the reaction for 30 min. The SCNconcentration was reduced from 508.3 mg/L to 16.8 mg/L with a removal rate of 96.7%, and the SCN^- was completely removed by continuing the reaction for 60 min. The small amount of ·OH generated by micro-electrolysis oxidized part of Fe²⁺ to Fe3⁺, formed the complex Fe（NCS）₆^3- with SCN^-, which was oxidized to form a trace amount of CN^-, which was further mineralized to NH₃ and CO₂. The large amount of ·OH generated in the Fenton stage oxidized the remaining CN^- and all SCN^- to CNO^-, and finally mineralized to NO₃^- and N₂. This study provides a new pretreatment method for thiocyanate-containing wastewater, revealing the mechanism of the enhanced pretreatment of thiocyanate by iron-carbon Fenton technology. mechanism of pretreatment of thiocyanate.更多还原