二氧化钛-石墨烯光催化剂对城市黑臭水中氨氮去除的研究

Study on the Removal of Ammonia Nitrogen From Urban Black Odor Water by TiO_(2)-Graphene Photocatalyst

通过水热法对二氧化钛进行氧化石墨烯负载改性,并对复合材料光催化去除溶液中氨氮的能力进行了考察,探究了催化剂使用量、溶液pH、温度及初始NH_(4)^(+)-N质量浓度对氨氮去除效果的影响。结果表明:该复合材料提高了对紫外光的利用率,能有效处理氨氮废水。在紫外光照射下,当反应温度为30℃、溶液p H值为11、催化剂用量为0.5 g·L^(-1)、初始氨氮质量浓度为50 mg·L^(-1)时,氨氮去除效果最好,为79%。且在处理实际黑臭水体时,对氨氮去除率可达71.7%。

The load modification of titanium dioxide with GO was carried out by hydrothermal method,and the photocatalytic removal of ammonia nitrogen from the solution of the composite material was investigated.The effects of the amount of catalyst,solution pH,temperature and initial NH_(4)^(+)-N mass concentration on the removal of ammonia nitrogen were investigated.The experimental results showed that the composite material improved the utilization rate of ultraviolet light and effectively removed ammonia nitrogen.Under the irradiation of ultraviolet light,when the reaction temperature was 30℃,the pH value of the solution was 11,the dosage of catalyst was 0.5 g·L^(-1),and the initial ammonia nitrogen mass concentration was 50 mg·L^(-1),the removal effect of ammonia nitrogen was the best,reached 79%.In addition,the removal rate of ammonia nitrogen reached 71.7% when the actual black and odorous water was treated.