摘要
以氧化石墨烯、海藻酸钠为原料,制备了氧化石墨烯/海藻酸钠(GO/SA)复合凝胶球,并利用批平衡吸附方法探讨了该凝胶球对水体中亚甲基蓝(MB)的吸附特性。考察了吸附时间、投加量以及pH值等因素对吸附的影响。结果表明,随凝胶球加入量增大,MB去除率逐渐升高;在pH为中性及碱性条件下,对MB的去除率明显优于酸性条件;吸附4h后基本达到平衡,其吸附过程符合Freudlich等温吸附模型以及准二级动力学方程。该吸附剂成本低廉,性质稳定,为废水中相关染料的去除提供了一定的依据。
In this paper, sodium alginate（SA） and graphene oxide（GO） were used to synthesize the GO/SA composite gel balls by a facile approcah. The adsorption properties of methylene blue（MB） on the gel balls were studied through investigating the experimental parameters such as the pH, contact time and dosage. The results showed that the optimal weight was 0.025 g. Under the neutral and alkaline conditions, the removal rate was obviously better than the acidic conditions. After 4 h, the equilibrium was reached. The adsorption process of MB on GO/SA fitted well with the Freudlich isotherm model and the quasi-second-order kinetic equation. The GO/SA composite gel balls were low cost and simple preparation. Therefore, it had good application prospect in dye wastewater treatment.
作者
武庭瑄
Wu Tingxuan(Depanment of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China)
出处
《广东化工》
CAS
2018年第19期29-30,53,共3页
Guangdong Chemical Industry
关键词
氧化石墨烯
海藻酸钠
吸附
Graphene oxide
Sodium alginate
Adsorption
