高级氧化工艺降解水中磺胺甲基嘧啶研究

为有效去除水体污染物磺胺类抗生素(Sulfonamides antibiotics,SAs),采用高级氧化紫外/双氧水(UV/H_2O_2)和紫外/过硫酸盐(UV/PS)工艺降解磺胺甲基嘧啶(sulfamerazine,SM1)。研究表明,紫外与氧化剂(H_2O_2,PS)联用可显著提高去除率,其反应符合拟一级动力学模型。磺胺甲基嘧啶的去除率在一定范围随着氧化剂H_2O_2和PS的浓度升高而升高;磺胺甲基嘧啶初始质量浓度越大,反应速率越小。两种工艺降解磺胺甲基嘧啶最大去除率均发生在pH=3。NaCl会抑制两种工艺对目标污染物的降解,而适当的NaHCO_3可促进其降解反应的进行。腐植酸的存在对两种工艺降解污染物均会产生抑制作用。

Degradation of Sulfamerazine in Aqueous Solution by Advanced Oxidation Technology

In order to effectively remove sulfonamides antibiotics in aqueous solution ,the advanced oxidation ultraviolet/hydrogen peroxide and ultraviolet/persulfate technology are used to degrade sulfamerazine .Research shows that it can obviously improve the removal rate when adding oxidizers H2 O2 and PS ,and degradation process conforms first order kinetics model . Within a certain concentration of oxidizers H2 O2 and PS ,the removal rate of sulfamerazine will be improved with the increase of oxidant concentration ;the reaction rate decreases with the increase of sulfamerazine initial concentration ;when pH=3 , the maximum removal rate all happens by these two kinds of sulfamerazine degradation processes .NaCl has inhibiting effect on these two technologies ,but appropriate NaHCO3 has acceleration effect on it .Humic acids has inhibiting effect on the two kinds of degradation technologies .