灭活酿酒酵母对水中Ni~(2+)的吸附去除
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摘要
以灭活酿酒酵母菌为生物吸附剂,研究吸附剂对水中的镍离子吸附。考察了溶液初始pH、菌体投加量、温度等因素对吸附镍离子的影响,并对灭活酿酒酵母菌吸附镍离子的吸附动力学和吸附等温线进行了研究。通过动电电位分析,表明实验用的灭活酿酒酵母等电点介于3～4之间。当溶液的pH为7,吸附能力较好,灭活酵母菌对镍离子吸附量可达128.33 mg/g。随着酵母菌投加量增加,其对镍离子吸附量也随之下降。对灭活酵母吸附Ni~(2+)的数据进行动力学分析,发现灭活酵母菌对Ni~(2+)的吸附符合准二级动力学吸附模型,吸附量理论值q_(cal)为133.33 mg/g。对酵母菌吸附镍离子的等温吸附数据进行分析,表明灭活酵母菌对Ni~(2+)的吸附符合Langmuir等温模型。在30℃时,酵母菌对镍离子的饱和吸附量可达83.33 mg/g。
Inactivated Saccharomyces cerevisiae was used as biosorption agent to study the adsorption of Ni~(2+) ions. The influences of the initial pH of the solution,the amount of yeast and the temperature on the adsorption of nickel ions were investigated,and the adsorption kinetics and adsorption isotherm of Ni~(2+) ions were also studied. The electrokinetic potential analysis showed that the isoelectric point of inactivated saccharomycescerevisiaewasbetween 3 and 4.WhenthepHvalueofthesolutionwas 7,theadsorption capacity was good,and the inactivated yeast can adsorb the Ni~(2+) ions to 128.33 mg/g. As the amount of yeast increased,the adsorption of Ni~(2+) ions decreased. Kinetic analysis was conducted on the adsorption of Ni~(2+) by inactivated yeast,and the adsorption of inactivated yeast to Ni~(2+)ions was consistent with the quasi-second-order kinetic adsorption model. The theoretical value of adsorption was 133.33 mg/g. The isothermal adsorption data of Ni~(2+) ions adsorbed by yeast were analyzed,and the adsorption of inactivated yeast to Ni~(2+) ions was consistent with the Langmuir isothermal model.At 30℃,the yeast saturated adsorption amount of Ni~(2+) ions can reach 83.33 mg/g.
Inactivated Saccharomyces cerevisiae was used as biosorption agent to study the adsorption of Ni~(2+) ions. The influences of the initial pH of the solution,the amount of yeast and the temperature on the adsorption of nickel ions were investigated,and the adsorption kinetics and adsorption isotherm of Ni~(2+) ions were also studied. The electrokinetic potential analysis showed that the isoelectric point of inactivated saccharomycescerevisiaewasbetween 3 and 4.WhenthepHvalueofthesolutionwas 7,theadsorption capacity was good,and the inactivated yeast can adsorb the Ni~(2+) ions to 128.33 mg/g. As the amount of yeast increased,the adsorption of Ni~(2+) ions decreased. Kinetic analysis was conducted on the adsorption of Ni~(2+) by inactivated yeast,and the adsorption of inactivated yeast to Ni~(2+)ions was consistent with the quasi-second-order kinetic adsorption model. The theoretical value of adsorption was 133.33 mg/g. The isothermal adsorption data of Ni~(2+) ions adsorbed by yeast were analyzed,and the adsorption of inactivated yeast to Ni~(2+) ions was consistent with the Langmuir isothermal model.At 30℃,the yeast saturated adsorption amount of Ni~(2+) ions can reach 83.33 mg/g.
引文
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[3]谢金球.浅析电镀废水除镍[J].广东化工,2017,44(13):200-201.
[4]肖隆庚.含镍电镀废水处理技术研究概述[J].广东化工,2016,(3):93-94.
[5]戴文灿,,周发庭.电镀含镍废水治理技术研究现状及展望[J].工业水处理,2017,35(7):14-18.
[6]王文琪.化学法处理电镀废水的研究进展[J].电镀与环保,2017,37(2):1-4.
[7]相志彬.工业废水中重金属离子的常见处理方法[J].城市建设理论研究,2011,(31):1-3.
[8] Chakravarty P,Bauddh K,Kumar M. Remediation ofdyes from aquatic ecosystems by biosorption method using algae[J]. Algae and Environmental Sustain-ability,2015,(8):97-106.
[9] Fadel M,Hassanein N M,Elshafei M M,et al. Biosorp-tion of manganese from groundwater by biomass of Sac-charomyces cerevisiae[J]. HBRC Journal,2017,13(1):106-113.
[10]中国标准出版社第二室.中国环境保护标准汇编.水质分析方法[M].北京:中国标准出版社,2000:256-259.
[11] Montazerrahmati M M,Rabbani P,Abdolali A,et al. Ki-netics and equilibrium studies on biosorption of cadmi-um,lead,and nickel ions from aqueous solutions by in-tact and chemically modified brown algae[J]. Journal ofHazardous Materials,2011,185(1):401-407.
[12] Popuri S R,Vijaya Y,Boddu V M,et al. Adsorptive re-moval of copper and nickel ions from water using chito-san coated PVC beads[J]. Bioresource Technology,2009,100(1):194-199.