期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 627, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.127171
关键词
Adsorption; Humic acid; Magnetic graphene oxide; Response surface optimization
资金
- National Natural Science Foundation of China [11964018]
- Natural Science Foundation of Jiangxi Province of China [20181BAB202027]
A novel adsorbent called magnetic humic acid/graphene oxide composite (MHAGO) has been prepared for treating methylene blue (MB) from wastewater. The MHAGO showed high adsorption capacity for MB, and the adsorption process was found to be well described by certain kinetic and isotherm models.
A novel adsorbent called magnetic humic acid/graphene oxide composite (MHAGO) adsorbent was prepared for treating methylene blue (MB) from wastewater. The structure and morphology of MHAGO were characterized by FTIR, XRD, SEM and XPS. The response surface method was used to optimize the quality feeding ratio for the raw materials, and the best graphene oxide: humic acid: ferroferric oxide feeding ratio was determined to be 0.25:0.50:1.66. Batch adsorption experiments were performed with variation in the initial MB dye concentration, pH of the solution, adsorbent dosage and contact time. The results showed that the adsorption reaction occurred at 45 degrees C with 30 mg adsorbent to adsorb 5.0 mg/L MB in 100 mL solution, with a maximum MB adsorption capacity of approximately 59.00 mg/g for MHAGO. The adsorption kinetics and adsorption isotherms were found to be in accordance with the Elovich equation and Langmuir model, respectively. Moreover, the thermodynamic parameters showed that the adsorption is spontaneously endothermic. The mechanisms for MB adsorption onto the MHAGO surface was mainly electrostatic attraction, rc-rc interaction and hydrogen bonding. In addition, the MHAGO shows good feasibility for the removal of pollutants from real factory dyeing wastewater.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据