三维电解-芬顿氧化联用技术处理含铬染色废水

Treatment of chromium-containing dyeing wastewater by three-dimensional electrolysis-Fenton(TDE-Fenton) method

本文针对电镀阳极氧化表面处理所产生的含铬染色废水,研究了三维电解—芬顿联用技术处理该废水脱色及总铬去除效果。研究发现相比单一处理工艺,三维电解—芬顿氧化联用技术处理含铬染色废水,可有效降低废水中总铬的含量,并达到快速脱色的目的。当设置三维电解电压40 V对含铬染色废水电解60 min,后加入20 g·L^(-1)FeSO4和20 mL·L^(-1)H_2O_2芬顿氧化60 min后可以使废水脱色率达到99.99%,剩余总铬及Cr^(6+)的浓度在检出限以下,达到GB 21900-2008《电镀污染物排放标准》中表3排放标准。

In this paper,the chromium-containing dyeing wastewater produced by electroplating anodizing surface treatment was studied.The effect of three-dimensional electrolysis-Fenton combined technology on the decolorization and total chromium removal of the wastewater was studied.This study found that compared with a single treatment process,three-dimensional electrolysis-Fenton oxidation combined technology to treat chromium-containing dyeing wastewater can effectively reduce the total chromium content in wastewater and achieve the purpose of rapid decolorization.When the three-dimensional electrolysis voltage of 40 V is set to electrolyze the chromium-containing dyeing wastewater for 60 min,and then 20 g·L^-1 FeSO4 and 20 mL·L^-1 H2O2 Fenton oxidation was added into the solution for 60 min,the decolorization rate of the wastewater can reach 99.99%,and the remaining total chromium and the concentration of Cr^6+ is below the detection limit and meets the emission standard of Table 3 in GB 21900-2008 Electroplating Pollutant Emission Standard.