Preparation of an aminated macroreticular resin adsorbent and its adsorption of p-nitrophenol from water.
A chloromethylated styrene-divinylbenzene copolymer was post-cross-linked through Friedel-Crafts reaction to get a macroreticular resin adsorbent NA-01, and then chemically modified by dimethylamine to obtain an aminated adsorbent NA-01A. Batch adsorption runs of p-nitrophenol from aqueous solution onto adsorbent NA-01A were conducted to evaluate the effect of amino group on adsorption. The adsorption capacity of p-nitrophenol on NA-01A increased noticeably by comparison with the mother adsorbent. A linear relationship was observed between the adsorption capacity of NA-01A caused by amination and the equilibrium concentration of p-nitrophenol in aqueous solution, which can be reasonably elucidated by a modified isotherm equation based on the Freundlich model. The breakthrough curves on both adsorbents were experimentally determined and also predicted by the mathematic model based on the non-linear wave propagation theory and the corresponding isotherm model. The model based on the Freundlich model gave a good prediction of the breakthrough curve on NA-01, but a deviation occurred for NA-01A when C/C0 less than 0.3. However, another model based on the modified isotherm equation provided a better prediction for the breakthrough curves on NA-01A.
Pan
Bingcai
B
State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China. bcpan@nju.edu.cn
Chen
Xinqing
X
Pan
Bingjun
B
Zhang
Weiming
W
Zhang
Xiao
X
Zhang
Quanxing
Q
D000327:Adsorption; D000588:Amines; D009596:Nitrophenols / Q000493:pharmacokinetics*; D012117:Resins, Synthetic / Q000138:chemical synthesis*; D014867:Water; D018508:Water Purification
D000588:Amines; D009596:Nitrophenols; D012117:Resins, Synthetic; D014867:Water; C024836:4-nitrophenol