预氧化法制备棉花秸秆活性炭去除印染废水中的铬(Ⅵ)  

Removing of chromium(VI)from dyeing wastewater with cotton straw activated carbon prepared by pre-oxidation method

作　　者：努热曼古丽·图尔荪 谢开 马承愚[3] 刘书杰 Nuremanguli·TUERSUN;XIE Kai;MA Chengyu;LIU Shujie(College of Chemistry and Environmental Science,Kashi University,Xinjiang Biomass Solid Waste Resources Technology and Engineering`Center,Kashi 844006,China;China CMCU Engineering Corporation,Chongqing 400039,China;China State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University,Shanghai 201620,China;Aksu Xindi Mineral Resources Development Co.,Ltd.,Aksu 843000,China)

机构地区：[1]喀什大学化学与环境科学学院新疆生物类固废资源化工程技术研究中心,新疆喀什844006 [2]中机中联工程有限公司,重庆400039 [3]国家环境保护纺织工业污染防治工程技术中心(东华大学),上海201620 [4]阿克苏地区新地矿产资源开发有限责任公司,新疆阿克苏843000

出　　处：《印染》2024年第8期69-73,共5页China Dyeing and Finishing

基　　金：新疆维吾尔自治区自然科学基金项目(2021D01B06)。

摘　　要：以新疆南疆棉花秸秆为原料,采用H_(2)SO_(4)预氧化和KOH活化制备活性炭,其Langmuir比表面积达到1 580.94 cm^(2)/g。采用静态吸附试验研究活性炭对印染废水中铬(Ⅵ)的吸附性能。结果表明:p H为2,Cr(Ⅵ)的初始质量浓度为0.5 mg/L,活性炭投加量为0.1 g,吸附时间为150 min时,Cr(Ⅵ)的吸附量为28 mg/g。Langmuir吸附等温线能更好地描述棉花秸秆活性炭吸附Cr(Ⅵ)的过程,R^(2)为0.988 24,说明棉花秸秆活性炭的表面Cr(Ⅵ)主要以单分子层形态吸附。活性炭对铬(Ⅵ)的吸附符合准二级动力学模型,R^(2)为0.950 25。Activated carbon is prepared from cotton straw in southern Xinjiang using H_(2)SO_(4) pre-oxidation meth-od and KOH activation.The specific surface area of Langmuir reaches 1580.94 cm^(2)/g.Using static adsorption experiments,the adsorption performance of activated carbon on chromium(VI)in dyeing wastewater is ana-lyzed.The results show that when the pH is 2,the initial concentration of Cr(Ⅵ)is 0.5 mg/L,the mass of activat-ed carbon is 0.1 g,and the adsorption time is 150 min,the adsorption capacity of Cr(Ⅵ)is 28 mg/g.The Lang-muir adsorption isotherm can better describe the process of Cr(Ⅵ)adsorption by cotton straw activated car-bon with an R^(2) of 0.98824.It shows that Cr(Ⅵ)adsorbed on the surface of cotton straw activated carbon is mainly distributed in monolayer form.The kinetics show that the adsorption conforms to the quasi second or-der kinetic model with an R^(2) of 0.95025.

关 键 词：废水处理 棉花秸秆 活性炭 吸附铬(Ⅵ) 印染废水 

分 类 号：X703.1[环境科学与工程—环境工程] TS199[轻工技术与工程—纺织化学与染整工程]