秦巴稻壳活性炭制备及对染料废水的吸附  

Preparation of Activated Carbon from Rice Hull of Qinba and Its Adsorption Characteristics to Dye Wastewater

作　　者：吴娟娟 朱斌 弓世龙 韦未 史娟[1] 谭婷 WU Juanjuan;ZHU Bin;GONG Shilong;WEI Wei;SHI Juan;TAN Ting(Shaanxi Key Laboratory of Catalysis,School of Chemical and Environmental Sciences,Shaanxi University of Technology,Hanzhong 723000)

机构地区：[1]陕西省催化基础与应用重点实验室,陕西理工大学化学与环境科学学院,汉中723000

出　　处：《食品工业》2021年第2期64-68,共5页The Food Industry

基　　金：国家级大学生创新创业训练计划项目(No.201910720004、No.201910720028);国家自然科学基金资助项目(21373132);陕西省教育厅重点科学研究计划项目(No.18JS024),陕西省教育厅科学研究项目(No.17JS026);陕西理工大学协同创新专项项目(No.QBXT-18-2),陕西理工大学人才启动项目(SLGRC11)。

摘　　要：研究硫酸活化法制备稻壳活性炭的工艺条件,考察炭化温度、炭化时间,活化时间、活化温度、固液比、活化剂浓度对活性炭吸附能力的影响。稻壳活性炭制备的最佳条件为炭化时间2 h,炭化温度700℃;活化时间60min,活化温度60℃,固液比1︰2(g/mL),活化剂浓度1︰0.5(V(硫酸)︰V(水),mL/mL)。研究活性碳对染料废水的吸附性能,考察pH、温度及时间对吸附能力的影响。稻壳活性炭在pH 7、温度50℃、吸附时间90 min时,对废水中甲基橙的吸附去除率最高,为98.7%;废水中品红的吸附去除率在pH 6、温度60℃、吸附时间120 min时为98.1%。The technology condition for preparation of active carbon from rice hull by sulphuric acid activation and the factors influencing the activation was investigated.The results showed that the optimal carbonization time 2 h and carbonization temperature 700℃.The optimal adsorption condition by the active carbon was obtained by means of orthogonal experiment:activation time 60 min,activaion temperature 60℃,solid-to-liquid ration 1︰2(g/mL)and dilution ration 1︰0.5(V(sulphuric acid)︰V(water),mL/mL).In addition,the adsorption characteristics of active carbon for dye wastewater were studied under different pH,temperature and time.The removal rate of methyl orange reached 98.7%with pH 7,the temperature 50℃and adsorption time 90 min.The best adsorption condition of active carbon on fuchsin were pH 6,the temperature 60℃and time 120 min,the removal rate up to 98.1%.

关 键 词：活性炭 染料废水 吸附特性 

分 类 号：X703[环境科学与工程—环境工程] TQ424.1[化学工程]