均苯四甲酸二酐改性甘蔗渣及其对冶金废水中铅的吸附性能研究  

Study on Modification of Bagasse with Pyromellitic Dianhydride and Its Adsorption Performance to Lead in Waste Water

作　　者：谢雪珍 叶有明 陶利婷 廖文娟 胡华钰 黄孟鲜 XIE Xue-zhen;YE You-ming;TAO Li-ting;LIAO Wen-juan;HU Hua-yu;HUANG Meng-xian(Guangxi Science 8•-Technology Normal University,Laibin 546199,Guangxi,China)

机构地区：[1]广西科技师范学院,广西来宾546199

出　　处：《有色金属（冶炼部分）》2021年第2期99-105,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：广西糖资源工程技术研究中心资助项目(桂科AD16450040);来宾市金属材料加工与清洁生产重点实验室项目(来科能193301);广西科技师范学院青年科研创新团队项目(GXKS2020QNTD04);广西科技师范学院大学生创新创业训练计划项目(201911546012)。

摘　　要：以经碱和醇预处理过的甘蔗渣为原料,采用戊二醛为交联剂,均苯四甲酸二酐(PMDA)为改性剂,对甘蔗渣纤维进行羧基化改性,并用于冶金废水中铅的吸附。结果表明,甘蔗渣改性最佳工艺条件为:戊二醛浓度1%、PMDA添加量5%、液固比8∶1、改性温度60℃。红外光谱分析表明甘蔗渣中引入了苯环和羧基基团,戊二醛和PMDA成功改性甘蔗渣。SEM发现改性后的甘蔗渣形成了交联状,表面积增大。最佳吸附条件:吸附时间2.0h、吸附温度20℃、溶液pH=4,溶液中Pb的初始浓度70mg/L,Pb吸附率可达到98.8%。Bagasse pretreated with alkali and alcohol was carboxylation modified with glutaric dialdehyde as cross-linking agent and pyromellitic dianhydride(PMDA)as modifying agent,and it was used to adsorb lead in waster water of metallurgy.The results show that the optimum modification parameters of bagasse include dosage of glutaric dialdehyde of 1%,dosage of PMDA of 5%,L/S=8(mL/g),and modifying temperature of 60℃.The IR shows that benzene ring and carboxyl group are introduced into bagasse,and bagasse is successfully modified.SEM shows that the modified bagasse forms cross-linking which has high BET surface area.Lead adsorption rate is 98.8%under the optimum adsorption conditions including adsorption time of 2.0 h,adsorption temperature of 20℃,pH value of solution of 4,and the initial concentration of Pb in solution of 70 mg/L.

关 键 词：甘蔗渣 均苯四甲酸二酐 改性 吸附 铅 

分 类 号：X756[环境科学与工程—环境工程]