Photocatalytic degradation of oxytetracycline hydrochloride (OTC-HCl) in marine aquaculture wastewater and therefore the effects of factors on the effectiveness of photocatalysts are studied in this paper using Zn_0.75Mn_0.75Fe_1.5O₄/ZnFe₂O₄/ZnO under visible light and changing the molar ratio of Zn²⁺:Fe³⁺:Mn²⁺, calcination temperature of catalysts, hydrogen peroxide concentration, dose of catalysts, illumination time of photocatalytic and initial concentration of OTC-HCl. The degradation of OTC-HCl in marine aquaculture wastewater was optimized by orthogonal experiment. The best effect exists when the molar ratio of Zn²⁺:Fe³⁺:Mn²⁺ was 10:1:3, the calcination temperature of photocatalyst was 400°C, the concentration of hydrogen peroxide was 0.5 g/L, the dose of catalysts was 0.6 g/L, the illumination time was 2.5 h and the initial concentration of OTC-HCl was 0.010 g/L. The degradation rate of OTC-HCl can reach 80.18%. Zn_0.75Mn_0.75Fe_1.5O₄/ZnFe₂O₄/ZnO can effectively degrade the OTC-HCl in marine aquaculture wastewater under visible light.

中文翻译：

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Zn0.75Mn0.75Fe1.5O4/ZnFe2O4/ZnO光催化剂去除海水养殖废水中盐酸土霉素的研究

本文采用Zn _0.75 Mn _0.75 Fe _1.5 O ₄ /ZnFe ₂ O ₄ /ZnO，在可见光下光催化降解海水养殖废水中的盐酸土霉素(OTC-HCl)，进而研究各因素对光催化剂效果的影响。改变 Zn ²⁺ :Fe ³⁺ :Mn ²⁺的摩尔比、催化剂的煅烧温度、过氧化氢浓度、催化剂剂量、光催化的光照时间和 OTC-HCl 的初始浓度。通过正交试验优化了OTC-HCl在海水养殖废水中的降解效果。当Zn ²⁺ :Fe ³⁺ :Mn ²⁺的摩尔比为10:1:3，光催化剂的煅烧温度为400℃，过氧化氢浓度为0.5 g/L，剂量时效果最佳。催化剂用量为 0.6 g/L，光照时间为 2.5 h，OTC-HCl 初始浓度为 0.010 g/L。OTC-HCl的降解率可达80.18%。Zn _0.75 Mn _0.75 Fe _1.5 O ₄ /ZnFe ₂O ₄ /ZnO在可见光下可有效降解海水养殖废水中的OTC-HCl。