Activation Peroxymonosulfate by CoCo-PBA@CuFe-LDH for the Degradation of Atrazine

Abstract In order to effectively degrade atrazine (ATZ) in wastewater, CoCo-PBA@CuFe-LDH composite was prepared by using co-precipitation method to load cobalt-based Prussian blue analogue (CoCo-PBA) on the layered double hydroxides CuFe-LDH, which was used to activate peroxymonosulfate (PMS) for ATZ degradation. Investigating of the main influencing factors of the degradation process revealed that increase of CoCo-PBA@CuFe-LDH dosage and temperature were all favorable to ATZ degradation; excessive dosage of PMS has a slight inhibitory effect on ATZ degradation; over-acidic and over-alkaline environments were not beneficial to ATZ degradation; the presence of HCO₃^-, H₂PO₄^-, and Cl^- ions in the system all showed certain inhibitory effects on ATZ degradation. The optimal reaction conditions for the degradation of ATZ in CoCo-PBA@CuFe-LDH/PMS system were as follows:15 mg·L^-1 ATZ, 300 mg·L^-1 PMS, 50 mg·L^-1 CoCo-PBA@CuFe-LDH, initial pH 6.3, and temperature 298 K, and the degradation rate of ATZ was up to 99.5% after 15 min. After 4 times of recycling, the degradation rate of ATZ still reached 83.4%, indicating that CoCo-PBA@CuFe-LDH had good catalytic activity and reusability. In addition, the study found that sulfate radicals (SO^·-₄) and hydroxyl radicals (·OH) were generated simultaneously in the CoCo-PBA@CuFe-LDH/PMS system, and SO₄^·- played a more critical role in the degradation of ATZ.

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	Ma Xiao
	Wang Yan
	Li Guobing
	Cai Wangfeng

Keywords： peroxymonosulfate (PMS)； CoCo-PBA@CuFe-LDH； atrazine (ATZ)； sulfate radicals； degradation

Received 2020-06-08;

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Ma Xiao, Wang Yan, Li Guobing, Cai Wangfeng.Activation Peroxymonosulfate by CoCo-PBA@CuFe-LDH for the Degradation of Atrazine[J] Chemcial Industry and Engineering, 2021,V38(2): 9-18

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