Adsorption characteristics of arsenic and fluoride in
water by magnetic hydrothermal carbon
1. School of Environment Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China; 2. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
Abstract：Magnetic hydrothermal carbon (mHTC) was prepared by hydrothermal synthesis method and characterized by Xray diffraction (XRD) and Zeta potential and molecular weight analyzer. The adsorption properties of mHTC to arsenate and fluoride in water were investigated by experiments. The results show that the removal rate of arsenic and fluorine reaches about 85％ when the dosage is 2 g·L-1. The removal rate is changed by pH and decreased with the increasing of Is and C0. The adsorption isotherms are well fitted by Langmuir model at different temperatures, and increasing temperature is favorable for adsorption. The maximum removal capacities of arsenic and fluoride are 26.06 mg·g-1 and 15.64 mg·g-1 under the single system with 20.42 mg·g-1 and 13.62 mg·g-1 under the coexistence system, respectively. Arsenic and fluorine inhibit each other in coexistent solutions. The pseudosecondorder model is the best for predicting the adsorption kinetics. After five times of recycles, the removal rate of arsenic and fluorine is decreased, while it has advantages from practicality.
付晶晶, 金杰, 吉华顺, 刘洋洋, 付晓茹. 磁性水热炭对水体中砷、氟的吸附特性[J]. 江苏大学学报（自然科学版）, 2019, 40(4): 423-430.
FU Jing-Jing, JIN Jie, JI Hua-Shun, LIU Yang-Yang, FU Xiao-Ru. Adsorption characteristics of arsenic and fluoride in
water by magnetic hydrothermal carbon[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(4): 423-430.
2019, Vol. 40 
