CdS纳米粒子对染料的光催化降解及其对大肠杆菌生物毒性的研究  

Photocatalytic degradation of dyes by CdS nanoparticles and its biotoxicity to Escherichia coli

作　　者：王健淇 赵敏[1] 王赫 袁月 闫新元 崔岱宗[1] WANG Jianqi;ZHAO Min;WANG He;YUAN Yue;YAN Xinyuan;CUI Daizong(College of Life Science,Northeast Forestry University,Harbin Heilongjiang 150040)

机构地区：[1]东北林业大学生命科学学院,黑龙江哈尔滨150040

出　　处：《环境污染与防治》2020年第8期959-963,共5页Environmental Pollution & Control

基　　金：中央高校基本科研业务费专项资金项目(No.2572018BD04);黑龙江省自然科学基金联合引导项目(No.LH2019C010)。

摘　　要：采用化学沉降法成功合成了CdS纳米粒子,并将其应用于合成染料的光催化降解,同时探讨了CdS纳米粒子对大肠杆菌(Escherichia coli)细胞的生物毒性作用。结果表明:(1)CdS纳米粒子为立方和六面晶型的混合物。(2)光照条件下,4h时甲基橙、考马斯亮蓝及刚果红脱色率均为70%以上;黑暗条件下均不超过30%。CdS纳米粒子可在可见光照射条件下高效催化各类染料脱色。(3)CdS纳米粒子在第1次光催化循环内对体系中甲基橙的脱色率为64%,第2、3次分别可达到51%、36%。CdS纳米粒子有能力对连续添加的染料进行降解。(4)CdS纳米粒子对大肠杆菌具有较高生物毒性。CdS nanoparticles(NPs)was synthesized by the chemical precipitation method and applied to the photocatalytic degradation of synthetic dyes.Meanwhile,the biological toxicity of CdS NPs was discussed on Escherichia coli cells.The results showed that:(1)CdS NPs were a mixture of cubic and hexagonal crystals.(2)Under the light condition,the decolorization rate of methyl orange,Coomassie brilliant blue and Congo red reached more than 70%at 4 h,and less than 30%under dark condition.CdS NPs could efficiently catalyze the decolorization of all kinds of dyes under visible light irradiation.(3)In the first photocatalytic cycle,the decolorization rate of methyl orange by CdS NPs was 64%,and then the decolorization rates of the second and third times were 51%and 36%.CdS NPs had the ability to decolorize repeated additions of dye.(4)CdS NPs were high biological toxicity to Escherichia coli.

关 键 词：CDS纳米粒子 光催化 染料 生物毒性 

分 类 号：X172[环境科学与工程—环境科学] X703