还原石墨烯动态吸附磺胺嘧啶类抗生素的性能与机理研究
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摘要
[目的]研究还原石墨烯动态吸附磺胺嘧啶类抗生素的性能与机理。[方法]利用热沉积法制备出还原石墨烯-玻璃珠复合材料,并用其开展动态吸附磺胺嘧啶类抗生素的试验研究,考察pH、背景液种类、流速、污染物浓度等影响因素对石墨烯吸附抗生素性能的影响,分别采用Thomas模型和Yan模型对试验数据进行拟合。[结果]随着流速和pH的升高,穿透时间缩短,吸附柱对磺胺嘧啶的吸附总量减小;而随着背景液换为二价Ca2+和磺胺嘧啶初始浓度的降低,穿透时间延长,吸附柱对磺胺嘧啶的吸附总量增大。Thomas模型和Yan模型均能够较好地描述抗生素在石墨烯柱中的穿透曲线,2种模型拟合的结果与试验得到的结果非常接近,但Yan模型的决定系数R2更接近1,效果更好。[结论]该研究可为实际抗生素类污染水体的治理与修复提供科学依据。
[Objective] The research aimed to study the performance and mechanism of dynamic adsorption of sulfadiazine antibiotics by graphene.[Method]The reduced graphene-glass bead composite was prepared by thermal deposition method,and the experimental study on dynamic adsorption of sulfadiazine antibiotics was carried out.The effects of pH,background liquid type,flow rate and pollutant concentration on the performance of graphene adsorption antibiotics were investigated.The Thomas data and Yan model were used to fit the experimental data.[Result]The sulfadiazine adsorptivity and the breakthrough time decreased with an increase in the pH value and flow rate.In contrast,the sulfadiazine adsorptivity increased and the breakthrough time prolonged when changing the ion species to bivalent Ca2+and decreasing the initial sulfadiazine concentration.Both the Thomas model and the Yan model could better describe the penetration curve of antibiotics in the graphene column.The results of the two model fittings were very close to those obtained by the experiment,but the decision coefficient R2 of the Yan model was closer to 1,and the effect was better.[Conclusion] This study can provide a scientific basis for the treatment and restoration of actual antibiotic contaminated water bodies.
[Objective] The research aimed to study the performance and mechanism of dynamic adsorption of sulfadiazine antibiotics by graphene.[Method]The reduced graphene-glass bead composite was prepared by thermal deposition method,and the experimental study on dynamic adsorption of sulfadiazine antibiotics was carried out.The effects of pH,background liquid type,flow rate and pollutant concentration on the performance of graphene adsorption antibiotics were investigated.The Thomas data and Yan model were used to fit the experimental data.[Result]The sulfadiazine adsorptivity and the breakthrough time decreased with an increase in the pH value and flow rate.In contrast,the sulfadiazine adsorptivity increased and the breakthrough time prolonged when changing the ion species to bivalent Ca2+and decreasing the initial sulfadiazine concentration.Both the Thomas model and the Yan model could better describe the penetration curve of antibiotics in the graphene column.The results of the two model fittings were very close to those obtained by the experiment,but the decision coefficient R2 of the Yan model was closer to 1,and the effect was better.[Conclusion] This study can provide a scientific basis for the treatment and restoration of actual antibiotic contaminated water bodies.
引文
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[12]胡奇,李玉立,潘红玉,等.改性木屑对水中苯胺的动态吸附[J].环境工程学报,2016,10(9):4663-4667.
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[2]GRENNI P,ANCONA V,CARACCIOLO A B.Ecological effects of antibiotics on natural ecosystems:A review[J].Microchemical journal,2018,136:25-39.
[3]ZHANG Q Q,YING G G,PAN C G,et al.Comprehensive evaluation of antibiotics emission and fate in the river basins of China:Source analysis,multimedia modeling,and linkage to bacterial resistance[J].Environmental science&technology,2015,49(11):6772-6782.
[4]祁彦洁,刘菲.地下水中抗生素污染检测分析研究进展[J].岩矿测试,2014,33(1):1-11.
[5]PRIETO-RODRGUEZ L,OLLER I,KLAMERTH N,et al.Application of solar AOPs and ozonation for elimination of micropollutants in municipal wastewater treatment plant effluents[J].Water research,2013,47(4):1521-1528.
[6]TAMBOSI J L,DE SENA R F,FAVIER M,et al.Removal of pharmaceutical compounds in membrane bioreactors(MBR)applying submerged membranes[J].Desalination,2010,261(1):148-156.
[7]STASINAKIS A S.Review on the fate of emerging contaminants during sludge anaerobic digestion[J].Bioresource technology,2012,121:432-440.
[8]XU Y G,YU W T,MA Q,et al.Interactive effects of sulfadiazine and Cu(II)on their sorption and desorption on two soils with different characteristics[J].Chemosphere,2015,138:701-707.
[9]PERREAULT F,DE FARIA A F,ELIMELECH M.Environmental applications of graphene-based nanomaterials[J].Chemical society reviews,2015,44(16):5861-5896.
[10]崔智慧.磁性氧化石墨烯负载砂子对水中As(v)的动态吸附研究[D].长沙:湖南大学,2014.
[11]李亚娟,赵传起,洪沛东,等.磁性还原石墨烯的制备及其对抗生素的吸附性能[J].环境工程学报,2018,12(1):15-24.
[12]胡奇,李玉立,潘红玉,等.改性木屑对水中苯胺的动态吸附[J].环境工程学报,2016,10(9):4663-4667.
[13]CHU K H.Fixed bed sorption:Setting the record straight on the BohartAdams and Thomas models[J].Journal of hazardous materials,2010,177(1/2/3):1006-1012.
[14]MAITI S K,BERA D,CHATTOPADHYAY P,et al.Determination of kinetic parameters in the biosorption of Cr(VI)on immobilized Bacillus cereus,M116in a continuous packed bed column reactor[J].Applied biochemistry&biotechnology,2009,159(2):488-504.