摘要
采用批量处理法探究活性硅酸钙(S)、膨润土(B)、硅藻土(D)的添加对紫色土(P)吸附四环素(TC)的影响。结果表明:各供试土样对TC的吸附符合Langmuir模型,最大吸附量q m在5.64 mmol/kg^54.13 mmol/kg之间,且当材料添加质量分数为5%时土样对TC吸附效果最佳;相同材料添加比例下,土样对TC的吸附量均呈现出P-B>P-S>P-D>P;热力学参数表明,TC吸附是一个自发、吸热和熵增的反应,当pH值为5、离子浓度为0.1 mol/L时吸附量达到最大。
The effects of 3 additives,active calcium silicate(S),bentonite(B)and diatomite(D),on tetracycline(TC)adsorption by purple soil(P)were studied by batch method.The results showed that the adsorption of TC by each soil sample was consistent with Langmuir model,the maximum adsorption q m was between 5.64 mmol/kg and 54.13 mmol/kg,and the adsorption was the most effective when the mass fraction of the additives was 5%.Under the same adding ratio,the adsorption of TC showed P-B>P-S>P-D>P.According to thermodynamic parameters,the adsorption was a spontaneous,endothermic and entropic increase reaction.The adsorption capacity reached its maximum when pH value was 5 and the ion concentration was 0.1 mol/L.
作者
邓红艳
曹雪雯
李文斌
张慧
何海霞
王丹
任丽平
孟昭福
DENG Hong-yan;CAO Xue-wen;LI Wen-bin;ZHANG Hui;HE Hai-xia;WANG Dan;REN Li-ping;MENG Zhao-fu(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China;Department of Natural Resource and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China)
出处
《环境监测管理与技术》
CSCD
2020年第6期68-71,共4页
The Administration and Technique of Environmental Monitoring
基金
国家自然科学基金资助项目(41271244)
四川省科技厅基金资助项目(2018JY0224)
西华师范大学基本科研业务费基金资助项目(17E062)。
关键词
材料添加
四环素
吸附量
紫色土
Material addition
Tetracycline
Adsorption amount
Purple soil
