采用溶剂热法制备了一种新型磁性氧化石墨烯-凹凸棒石(GO-ATP)复合材料,并对其吸附亚甲基蓝(MB)废水的性能进行了研究。探讨了吸附时间、溶液pH、染料初始浓度和吸附剂投加量对吸附效果的影响。结果表明:当MB溶液浓度为10mg/L,pH为7,吸附时间达60min,投加0.03g磁性GO-ATP复合材料,对MB的去除效率可达98.64%。通过吸附动力学和等温线的拟合,发现磁性GO-ATP复合材料对MB的吸附过程属于均质表面的单分子层化学吸附。同时,吸附过程为吸热、自发反应过程。利用后的磁性GO-ATP复合材料可通过磁铁高效分离回收,可回收率达98.67%。经吸附-再生3次后,MB去除率仍可达到90.41%。
A novel magnetic GO-ATP composite was prepared by a solvothermal method,and the adsorption performance of methylene blue in wastewater was studied.The effects of adsorption time,pH of solution,initial concentration of dye and adsorbent dosage on the adsorption were investigated.The results showed that when the concentration of MB solution was 10mg/L,the pH value was 7,the adsorption time was 60 min and the magnetic GO-ATP dosage was 0.03g,the removal efficiency could reach 98.64%.It was found that the adsorption process of the composite material on MB belonged to a monolayer chemical adsorption process on homogeneous surface,through the fitting of sorption kinetics and isotherm models.Meanwhile,the adsorption process was an endotstudied hermic and spontaneous reaction process.The utilized magnetic GO-ATP could be efficiently separated and recovered by a magnet,and the recoverable rate was 98.67%.The removal rate for MB could still reach 90.41% after three adsorption-regeneration cycles.
[1] 宋晓东,程昌敬,余海溶.阴离子聚电解质修饰磁性氧化石墨烯对碱性品红的吸附性能[J].化工进展,2016,35(9):2973-2981.
[2] Manna S,Roy D,Saha P,et al.Rapid methylene blue adsorption using modified lignocellulosic materials[J].Process Safety and Environmental Protection,2017,107:346-356.
[3] Isarain-Cháveza E,Baróa M D,Rossinyol E,et al.Comparative electrochemical oxidation of methyl orange azo dye using Ti/Ir-Pb,Ti/Ir-Sn,Ti/Ru-Pb,Ti/Pt-Pd and Ti/RuO2 anodes[J].Electrochimica Acta,2017,244:199-208.
[4] Hai F I,Yamamoto K,Nakajima F,et al.Degradation of azo dye a cid orange 7 in a membrane bioreactor by pellets and attached growth of Coriolus versicolour[J].Bioresour Technol,2013,141(4):29-34.
[5] 晏发春,汪恂,朱雷,等.水热法制备纳米TiO2处理染料废水实验研究[J].水处理技术,2016,42(2):27-29.
[6] Goswami M,Phukan P.Enhanced adsorption of cationic dyes using sulfonic acid modified activated carbon[J].Journal of Environmental Chemical Engineering,2017,5(4):3508-3517.
[7] Huang B Y,Liu Y G,Li B,et al.Effect of Cu(Ⅱ) ions on the enhancement of tetracycline adsorption by Fe3O4@SiO2-Chitosan/graphene oxide nanocomposite[J].Carbohydrate Polymers,2017,157:576-585.
[8] 张建民,王阿宁,李红玑,等.不同pH下GO-ATP纳米复合材料的分析与表征[J].应用化工,2017,46(7):1439-1443.
[9] 杨远秀,姚创,刘晖,等.氧化石墨烯负载磁性纳米铁去除亚甲基蓝研究[J].水处理技术,2018,44(10):53-57.
[10] Han Y,Xue T,Zhen Y,et al.Effects of the oxidation degree of graphene oxide on the adsorption of methylene blue[J].Journal of Hazardous Materials,2014,268:191-198.
[11] Yao Y,Miao S,Liu S,et al.Synthesis,characterization,and adsorption properties of magnetic Fe3O4@graphene nanocomposite[J].Chemical Engineering Journal,2012,184:326-332.
[12] Zhao D,Chen L,Sun M,et al.Preparation and application of magnetic graphene oxide composite for the highly efficient immobilization of U(Ⅵ) from aqueous solutions[J].Journal of Radioanalytical and Nuclear Chemistry,2015,306:221-229.
[13] 宋永强,张秀玲,张丽娟等.离子液体辅助水热法制备TiO2/CoFe2O4复合材料及光催化性能[J].硅酸盐学报,2015,43(4):493-497.
[14] 李东坤,单凤君,王双红.氧化石墨烯基复合材料对Cr(Ⅵ)的吸附研究[J].化工新型材料,2019,47(2):149-153.
[15] 范文娟,常会.磁性Fe3O4/膨胀石墨对亚甲基蓝的吸附性能研究[J].人工晶体学报,2017,46(11):2169-2177.
[16] 魏金枝,陈芳妮,孙晓君,等.氨基修饰磁性氧化石墨烯吸附离子型染料性能[J].中国环境科学,2016,36(7):2020-2026.
[17] 罗海燕,周靖,张燕娟,等.氧化石墨烯的制备及其对罗丹明B的吸附性能[J].化工新型材料,2019,47(1):172-180.
[18] 李红玑,周孝德,张建民,等.活化ATP对重金属离子Cr6+的吸附动力学性能研究[J].化工新型材料,2017,45(7):164-167.
[19] 马应霞,金朋生,邵文杰,等.表面接枝端羟基聚酰胺-胺的磁性氧化石墨烯对Hg(Ⅱ)的吸附性能[J].材料导报,2019,33(1):234-239.
[20] 王乐乐,黄国林,吕婷婷,等.磁性氧化石墨烯/壳聚糖纳米复合材料的制备及其对UO2+2的吸附性能[J].原子能科学技术,2017,51(10):1734-1741.
基金资助
陕西省教育厅专项科研计划(17JK0327)
PDF
(1989KB)
