State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Water Sci Technol. 2020 Mar;81(5):925-935. doi: 10.2166/wst.2020.176.
In this paper, boron-doped diamond (BDD) electro-activated persulfate was studied to decompose malachite green (MG). The degradation results indicate that the decolorization performance of MG for the BDD electro-activated persulfate (BDD-EAP) system is 3.37 times that of BDD electrochemical oxidation (BDD-EO) system, and BDD-EAP system also exhibited an enhanced total organic content (TOC) removal (2.2 times) compared with BDD-EO system. Besides, the degradation parameters such as persulfate concentration, current density, and pH were studied in detail. In a wider range of pH (2-10), the MG can be efficiently removed (>95%) in 0.02 M persulfate solution with a low current density of 1.7 mA/cm after 30 min. The BDD-EAP technology decomposes organic compounds without the diffusion limitation and avoids pH adjustment, which makes the EO treatment of organic wastewater more efficient and more economical.
本文研究了硼掺杂金刚石（BDD）电激活过硫酸盐来降解孔雀石绿（MG）。降解结果表明，BDD 电激活过硫酸盐（BDD-EAP）体系对 MG 的脱色性能比 BDD 电化学氧化（BDD-EO）体系高 3.37 倍，且 BDD-EAP 体系的总有机碳（TOC）去除率（2.2 倍）也高于 BDD-EO 体系。此外，还详细研究了过硫酸盐浓度、电流密度和 pH 等降解参数。在更宽的 pH 范围（2-10）内，在 0.02 M 过硫酸盐溶液中，电流密度为 1.7 mA/cm 时，MG 可以在 30 min 内被有效去除（>95%）。BDD-EAP 技术在没有扩散限制的情况下分解有机化合物，并且不需要调节 pH 值，这使得 EO 处理有机废水更高效、更经济。
