摘要
利用抗坏血酸在水热条件下将四氧化三铁(Fe3O4)和二硫化钼(MoS_(2))复合制备增强电子传递的Fe@C-MoS_(2),用于催化PMS降解阿特拉津(ATZ).当ATZ浓度为5mg/L,催化剂投加量为0.2g/L,PMS浓度为1mmol/L的条件下,反应35min后ATZ降解率可达84.6%.通过电化学实验和X射线光电子能谱(XPS)表征证明,Fe@C-MoS_(2)良好的催化性能归因于碳源诱导混合相MoS_(2)的生成,有效提高了催化剂的电导率,促进电子的快速转移.另外,通过生物毒性试验,以当地产蔬菜花椰菜为研究对象,评估了Fe@C-MoS_(2)/PMS体系降解后溶液作为农业灌溉用水的可行性,结果表明,降解后溶液对幼苗期花椰菜的存活个体数量与常规水源相比影响不大,对其生长水平无明显影响.
This study utilizes ascorbic acid under hydrothermal conditions to composite ferric oxide(Fe3O4)and molybdenum disulfide(MoS_(2)),preparing Fe@C-MoS_(2)with enhanced electron transfer for catalyzing the degradation of atrazine(ATZ)by peroxymonosulfate(PMS).Under the conditions of an ATZ concentration of 5mg/L,a catalyst dosage of 0.2g/L,and a PMS concentration of 1mmol/L,the removal rate of ATZ reached 84.6%after 35 minutes of reaction.Electrochemical experiments and XPS characterization demonstrated that the excellent catalytic performance of Fe@C-MoS_(2)is attributed to the carbon source-induced generation of mixed-phase MoS_(2),which effectively improves the conductivity of the catalyst and promotes rapid electron transfer.Additionally,through bio-toxicity tests using locally grown cauliflower as the study subject,the feasibility of using the solution degraded by the Fe@C-MoS_(2)/PMS system as agricultural irrigation water was evaluated.The results indicate that the post-degradation solution showed negligible effects on both the survival rate of cauliflower seedlings and their growth parameters when compared with conventional water sources.
作者
张如萍
王永全
叶荣斌
苏畅
刘丽华
陆正义
洪俊明
ZHANG Ru-ping;WANGYong-quan;YE Rong-bin;SU Chang;LIU Li-hua;LU Zheng-yi;HONG Jun-ming(Fujian Province Engineering Research Center of Industrial Wastewater Biochemical Treatment,College of Chemical Engineering,Huaqiao University,Xiamen 361021,China;Xiamen Tobacco Industrial Company Limited,Xiamen 361021,China;Fujian Xiamen Environmental Monitoring Central Station,Xiamen 361102,China)
出处
《中国环境科学》
北大核心
2025年第10期5539-5549,共11页
China Environmental Science
基金
国家自然科学基金资助项目(51978291)。
