虾蟹壳对水中刚果红吸附性能的研究
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摘要
以虾蟹壳为原料,采用酸化一步法制备出具有强吸附能力的虾蟹壳生物吸附剂,通过模拟试验研究了该吸附剂对废水中刚果红的去除特性,分析了吸附剂用量、吸附时间、pH值、吸附温度、刚果红初始浓度对吸附效果的影响。结果表明,最佳的吸附条件为吸附剂用量0.1 g、pH=7、吸附温度65℃、吸附时间2 h,最佳条件下的刚果红去除率达到92.96%。吸附剂对刚果红的吸附过程与拟二级动力学模型相符,吸附反应涵盖了外部液膜扩散、表面吸附和颗粒内扩散,其吸附速率与驱动力的平方成正比。
Shrimp and crab shell biosorbent, synthesized by acidification biological shrimp shells, has strong adsorption capacity. The removal of Congo red from wastewater by this biosorbent was studied through simulation experiment. The influences of important factors such as adsorbent dosage, adsorption time, adsorption temperature, pH value and initial concentration of Congo red on adsorption were systematically examined through static experiment.The results shows that the optimal conditions of adsorption are that the adsorption dosage is 0.1 g, the pH is 7, the adsorption temperature is 338 K and the adsorption time is 2 hours. The removal rate of Congo red reaches 92.96 % with such optimal conditions. The adsorption process of Congo red onto the biosorbent is consistent with the pseudo two order kinetics model. The adsorption reaction includes the diffusion of liquid film, surface adsorption and intraparticle diffusion.The adsorption rate is proportional to the square of the driving force.
Shrimp and crab shell biosorbent, synthesized by acidification biological shrimp shells, has strong adsorption capacity. The removal of Congo red from wastewater by this biosorbent was studied through simulation experiment. The influences of important factors such as adsorbent dosage, adsorption time, adsorption temperature, pH value and initial concentration of Congo red on adsorption were systematically examined through static experiment.The results shows that the optimal conditions of adsorption are that the adsorption dosage is 0.1 g, the pH is 7, the adsorption temperature is 338 K and the adsorption time is 2 hours. The removal rate of Congo red reaches 92.96 % with such optimal conditions. The adsorption process of Congo red onto the biosorbent is consistent with the pseudo two order kinetics model. The adsorption reaction includes the diffusion of liquid film, surface adsorption and intraparticle diffusion.The adsorption rate is proportional to the square of the driving force.
引文
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[3]Gurusamy A, Ruey-Shin J, Duu-Jong L. Use of cellulose-based wastes for adsorption of dyes from aqueous solutions[J]. Journal of Hazardous Materials,2002,92(3):263-274.
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[5]宋应华,朱家文,陈葵,等.大孔吸附树脂对红霉素的平衡吸附行为及其热力学性质[J].化工学报,2006,57(4):715-718.
[6]王哲,刘金亮,陈莉荣,等.高炉渣对Cd2+的吸附性能[J].化工环保,2015,35(2):187-191.
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[8]杨华.硅镁胶的制备表征及其吸附性能研究[D].山东青岛:中国海洋大学,2013.
[9]赵二劳,王美林,范建凤.花生壳对刚果红的吸附性能[J].生态与农村环境学报,2010,26(4):372-375.
[10]郭平,马小凡,康春莉,等.天然水体中优势菌种非活性细胞吸附Pb2+和Cd2+的热力学及动力学研究[J].吉林大学学报(理工版),2004,42(4):633-635.
[11]Yuh-Shan H. Review of second-order models for adsorption systems[J]. Journal of Hazardous Materials, 2006,136(3):681-689.
[12]李山.改性花生壳对水中重金属离子和染料的吸附特性研究[D].西北大学,2009.
[2]曾嘉,郑连英,余世清.甲壳素及其衍生物在食品工业中的应用新进展[J].食品工业科技, 2002,23(1):72-74.
[3]Gurusamy A, Ruey-Shin J, Duu-Jong L. Use of cellulose-based wastes for adsorption of dyes from aqueous solutions[J]. Journal of Hazardous Materials,2002,92(3):263-274.
[4]张林生,蒋岚岚.染料废水的脱色方法[J].化工环保,2000,20(1):14-18.
[5]宋应华,朱家文,陈葵,等.大孔吸附树脂对红霉素的平衡吸附行为及其热力学性质[J].化工学报,2006,57(4):715-718.
[6]王哲,刘金亮,陈莉荣,等.高炉渣对Cd2+的吸附性能[J].化工环保,2015,35(2):187-191.
[7]杨国栋.花生壳对水中Cr(VI)的吸附性能研究[D].甘肃兰州:兰州理工大学,2009.
[8]杨华.硅镁胶的制备表征及其吸附性能研究[D].山东青岛:中国海洋大学,2013.
[9]赵二劳,王美林,范建凤.花生壳对刚果红的吸附性能[J].生态与农村环境学报,2010,26(4):372-375.
[10]郭平,马小凡,康春莉,等.天然水体中优势菌种非活性细胞吸附Pb2+和Cd2+的热力学及动力学研究[J].吉林大学学报(理工版),2004,42(4):633-635.
[11]Yuh-Shan H. Review of second-order models for adsorption systems[J]. Journal of Hazardous Materials, 2006,136(3):681-689.
[12]李山.改性花生壳对水中重金属离子和染料的吸附特性研究[D].西北大学,2009.