Electrocatalytic oxidation of PCP-Na by a novel nano-PbO2anode: degradation mechanism and toxicity assessment

被引：13
作者：
Duan, Xiaoyue [1 ,2 ]
Sui, Xinyu [1 ]
Wang, Qian [1 ]
Wang, Weiyi [2 ]
Li, Na [1 ]
Chang, Limin [2 ]
机构：
[1] Jilin Normal Univ, Educ Dept Jilin Prov, Key Lab Environm Mat & Pollut Control, Siping 136000, Peoples R China
[2] Jilin Normal Univ, Minist Educ, Key Lab Preparat & Applicat Environm Friendly Mat, Changchun 130103, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2020年 / 27卷 / 35期
关键词：
PbO2; Hydrolysis; Electrocatalytic oxidation; PCP-Na; Toxicity; ELECTROCHEMICAL OXIDATION; AQUEOUS-SOLUTION; PBO2; ELECTRODE; PENTACHLOROPHENOL PCP; DIOXIDE ELECTRODES; COMPOSITE ANODE; FABRICATION; ZEBRAFISH; REMOVAL; MINERALIZATION;
D O I：
10.1007/s11356-020-10289-y
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study aims at investigating the electrocatalytic oxidation of sodium pentachlorophenate (PCP-Na) using a novel nano-PbO(2)powder anode. The nano-PbO(2)powder (marked as HL-PbO2) was prepared by a simple hydrolysis process, and hydrothermal treatment was followed to improve the activity of HL-PbO2. The HL-PbO(2)treated for 24 h by hydrothermal process (HL/HT-PbO2-24) was confirmed to possess higher crystallinity, higher oxygen evolution potential, and more active sites, resulting in stronger OH radical generation capacity and higher electrochemical activity. Compared with conventional electrodeposited PbO2(ED-PbO2) anode, the HL/HT-PbO2-24 anode showed higher PCP-Na degradation rate. Under the same operating conditions, the mineralization current efficiency at HL/HT-PbO2-24 was 2.7 times than that at ED-PbO2. Five intermediates were detected in PCP-Na degradation solution and possible degradation mechanism of PCP-Na was discussed. In addition, the acute toxicity of PCP-Na degradation solution to zebrafish embryos and the oxidative stress induced in zebrafish embryos/larvae were studied to evaluate the ecological security of electrocatalytic oxidation of PCP-Na.
引用
收藏
页码：43656 / 43669
页数：14
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