龙须菜纤维素去除水中铬(Ⅵ)离子的研究  

Study on Removal of Cr(Ⅵ) from Aqueous Solutions Using Gracilaria Lemaneiformis Cellulose

作　　者：朱琳[1] 顾冬雨[1] 李敏晶[1] 陈涛[1] 刘恒明[1] ZHU Lin GU Dong-yu LI Min-jing CHEN Tao LIU Heng-ming(School of Marine Science and Environment Engineering, Dalian Ocean University, Liaoning Dalian 116023, China)

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116023

出　　处：《广州化工》2017年第1期56-58,共3页GuangZhou Chemical Industry

基　　金：国家自然科学基金青年基金项目(No:31300289)

摘　　要：龙须菜是我国第三大养殖型海藻,目前已经在山东、福建等地大面积的种植,主要用于提取琼胶,提取琼胶后,主要的剩余部位为纤维素。本研究对龙须菜纤维素制备工艺进行了系统的研究,并将得到的纤维素用于含Cr(Ⅵ)废水的处理。干燥的龙须菜粉碎后,加入40倍的水提取琼胶,煮沸提取5次,每次5 h,干燥后得到龙须菜纤维素。0.25 g纤维素,在浓度为5 mg/L的Cr(Ⅵ)溶液中振荡120 min,pH值为2.0,可除去29.9%的铬(Ⅵ)。Gracilaria Lemaneiformis is the number 3 cultured marine algae in China,and had been widely planted in Shandong and Fujian province. It is mainly used for extracting agar,and cellulose is the by-product of the agar. In the present research,the preparation of cellulose from Gracilaria Lemaneiformis was studied,and the cellulose prepared was applied in the treatment of chrome-containing wastewater. As a result,the optimized process for preparation of cellulose was as follows： the material liquid ratio was 1∶40,the extraction time was 5 times,5 h each time. Under the optimum conditions of the dosage of cellulose from Gracilaria Lemaneiformis was 0. 25 g,the adsorption time was 120 min,pH2. 0,initial concentration of chrome was 5 mg / L,the adsorption rate of Cr6＋could be up to 29. 9%.

关 键 词：龙须菜 纤维素 铬(Ⅵ) 污水 

分 类 号：X714[环境科学与工程—环境工程]