改性绿豆壳对工业废水中Cr(Ⅵ)的吸附研究
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摘要
用绿豆壳作吸附剂,通过改性后对工业废水中铬离子Cr(Ⅵ)进行吸附试验,分别考察了吸附时间、pH、离子浓度、样品用量以及温度对吸附效果的影响。结果表明:吸附率与样品投加量成正相关系,随Cr(Ⅵ)初始浓度的增加而降低;随温度的增加而增大,1. 0000 g改性绿豆壳在pH=2. 0、T=25℃对初始浓度为70 mg/L的Cr(Ⅵ)溶液吸附6 h,吸附率可达95. 40%。因此,改性绿豆壳对六价铬Cr(Ⅵ)具有较好的吸附效果,可作吸附剂用于工业废水中铬Cr(Ⅵ)污染的治理。
The adsorption test of chromium ion Cr( Ⅵ) in industrial wastewater was carried out by using mung bean shell as adsorbent,and the effects of adsorption time,pH,ion concentration,sample dosage and temperature on adsorption ratio effect were investigated. The results showed that the adsorption ratio was positively related to sample dosage,decreased with initial Cr( Ⅵ) concentration,and increased with temperature. When the Cr( Ⅵ) solution with the initial concentration of 70 mg/L was adsorbed by the 1. 0000 g modified mung shell at pH = 2 at 25 ℃ for 6 h,the adsorption ratio was up to 95. 40%. Therefore,the modified mung bean shell had a good adsorption effect on hexavalent chromium Cr( Ⅵ) and can be used as an adsorbent for the treatment of chromium Cr( Ⅵ) pollution in industrial wastewater.
The adsorption test of chromium ion Cr( Ⅵ) in industrial wastewater was carried out by using mung bean shell as adsorbent,and the effects of adsorption time,pH,ion concentration,sample dosage and temperature on adsorption ratio effect were investigated. The results showed that the adsorption ratio was positively related to sample dosage,decreased with initial Cr( Ⅵ) concentration,and increased with temperature. When the Cr( Ⅵ) solution with the initial concentration of 70 mg/L was adsorbed by the 1. 0000 g modified mung shell at pH = 2 at 25 ℃ for 6 h,the adsorption ratio was up to 95. 40%. Therefore,the modified mung bean shell had a good adsorption effect on hexavalent chromium Cr( Ⅵ) and can be used as an adsorbent for the treatment of chromium Cr( Ⅵ) pollution in industrial wastewater.
引文
[1]马宏飞,韩秋菊,李薇,等.废茉莉花茶渣对Cr(Ⅵ)待吸附研究[J].科学技术与工程,2012,12(25):1671-1815.
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[7]陈莉,张宇,马沛勤.白菜渣对Cr(Ⅵ)的吸附性能[J].草业科学,2013,30(5):812-817.
[8]冯红英,薛晋阳,刘智峰.改性柚子皮对水中Cr6+的吸附研究[J].安徽化工,2011,37(5):50-51,54.
[2]郑足红,胡超,章爱群.改性香蕉皮对六价铬的去除研究[J].湖北农业科学,2017,56(5):854-858.
[3]丁绍兰,谢林花,高芳.香蕉皮对重金属六价铬吸附性能研究[J].陕西科技大学学报,2013,31(4):9-19.
[4]余以刚,杨倩倩,周显宏.豆皮对重金属离子Pb(Ⅱ)的吸附性能研究[J].食品研究与开发,2011,32(6):42-45.
[5]周显宏,杨倩倩,余以刚,等.豆皮对重金属离子Cr(Ⅵ)的吸附性能研究[J].东莞理工学院院报,2010,17(5):69-73.
[6]鲁秀国,段建菊.核桃壳炭对Cr(Ⅵ)的吸附性能研究[J].江西农业大学学报,2017,39(1):198-204.
[7]陈莉,张宇,马沛勤.白菜渣对Cr(Ⅵ)的吸附性能[J].草业科学,2013,30(5):812-817.
[8]冯红英,薛晋阳,刘智峰.改性柚子皮对水中Cr6+的吸附研究[J].安徽化工,2011,37(5):50-51,54.