Adsorption of Cu2+ wastewater with modified corn straw

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  • 1. College of Resources & Environment, Southwest University, Chongqing 400716, China;
    2. Key Lab of Chongqing Agricultural Resources & Environment, Chongqing 400716, China;
    3. Environmental Protection Bureau of Jiangjin District, Chongqing 402260, China

Received date: 2010-02-25

  Online published: 2019-06-03

Abstract

The influence of sorbent dosage, pH, temperature and contact time on the adsorption of Cu2+ by using modified corn straw have been studied. The results show that the adsorption rate of Cu2+ in the simulated wastewater is about 97.2%, and adsorption capacity is about 10 mg/g, when the dosage of corn straw is about 0.3 g (6 g/L),pH 6.5-7.0,adsorbing temperature 298 K and absorbing equilibrium time 35 minutes to the Cu2+ wastewater whose mass concentration is less than 50 mg/L. The adsorption capacity of modified corn straw to Cu2+ increases with the increase of Cu2+ equilibrium concentration in the solution, temperature, and absorbing time. The adsorption process can be fitted very well by Langmuir, Freundlich and Temkin equation. Among them, Langmuir equation described best. Its saturated adsorption capacity is 12.195 mg/g. The adsorption of Cu2+ with modified corn straw is a spontaneously endothermic reaction that reaches a stable balance within 35 min. Elovich equation is the best model to described the dynamics characteristic of Cu2+.

Cite this article

Liu Jiangguo, Chen Yucheng, Li Jiexia, Liu Bo, Jiang Xiaoli . Adsorption of Cu2+ wastewater with modified corn straw[J]. Industrial Water Treatment, 0 : 18 -21 . DOI: 10.11894/1005-829x.2010.30(6).18

References

[1] Wike A, Bunke G, Gatz P. Removal of lead, cadmium, nickel and zinc by adsorption on microalgae [J]. Progress in Mining and Oilfield Chemistry, 1999(4):337-346. [2] Ngah W S W, Endud C S, Mayanar R. Removal of copper(Ⅱ) ions from aqueous solution onto chitosan and cross-linked chitosan beads[J]. Reactive and Functional Polymers , 2002, 50(2):181-190. [3] 李伟,张玉军,胡静波.双变性淀粉吸附水溶液中铜离子的热力学和动力学研究[J]. 河南工业大学学报:自然科学版,2008,29(2):51-54. [4] 魏世强. 环境化学[M]. 北京:中国农业出版社,2006:1-10. [5] 闫峰,刘合满,梁东丽,等. 不同土壤对Cr 吸附的动力学特征[J].农业工程学报,2008,24(6):21-25. [6] 周隽,翟建平,吕慧峰,等. 木屑和花生壳吸附去除水溶液中Cr3+的试验研究[J]. 环境污染治理技术与设备,2006 ,7(1):122-125. [7] 刘丽莉,景有海,欧阳通. 水合氧化铈吸附水中磷酸根特性的研究[J]. 安全与环境学报,2007,7(2):64-67. [8] Malkoc E, Nuhoglu Y. Potential of tea factory waste for chromium(Ⅵ) removal from aqueous solutions:thermo dynamic and kinetic studies[J]. Sep. Purif. Technol.,2007,54(3):291-298. [9] Mohana S V, Raoa N C, Karthikeyan J. Adsorptive removal of directazo dye from aqueous phase onto coal based sorbents:a kinetic and mechanistic study[J]. Hazardous Materials, 2002,90(2):189-204. [10] 刘勇,肖丹,杨文树,等. 蛭石吸附Pb2+的动力学和热力学机理研究[J]. 四川大学学报:工程科学版,2005,37(5):62-68.

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