Electro-activated persulfate oxidation of malachite green by boron-doped diamond (BDD) anode: effect of degradation process parameters | Zendy

Dongtian Miao | Zendy; Guoshuai Liu | Zendy; Qiuping Wei | Zendy; Naixiu Hu | Zendy; Kuangzhi Zheng | Zendy; Chengwu Zhu | Zendy; Ting Liu | Zendy; Kechao Zhou | Zendy; Zhiming Yu | Zendy; Li Ma | Zendy

Open Access

Electro-activated persulfate oxidation of malachite green by boron-doped diamond (BDD) anode: effect of degradation process parameters

Author(s) -

Dongtian Miao,

Guoshuai Liu,

Qiuping Wei,

Naixiu Hu,

Kuangzhi Zheng,

Chengwu Zhu,

Ting Liu,

Kechao Zhou,

Zhiming Yu,

Li Ma

Publication year - 2020

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2020.176

Subject(s) - persulfate , malachite green , degradation (telecommunications) , anode , chemistry , diamond , electrochemistry , boron , advanced oxidation process , nuclear chemistry , materials science , electrode , organic chemistry , adsorption , catalysis , computer science , telecommunications

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/cm2 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.

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