Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (4): 464-471.DOI: 10.11944/j.issn.1000-0518.2017.04.160263

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Adsorptive Removal of Profenofos from Aqueous Solution by Chitosan/Pumice

PENG Bingxiana*(),ZHOU Aihongb   

  1. aCollege of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China
    bJiangxi Diyuan Drainage and Water Quality Detection Company Limited,Nanchang 330025,China
  • Received:2016-06-27 Accepted:2016-09-30 Published:2017-03-31 Online:2017-03-31
  • Contact: PENG Bingxian
  • Supported by:
    Supported by Natural Science Foundation of Jiangxi Province(No.20142BAB203020), Scientific and Technological Plan Project of Jiangxi Province(No.20141BBG70008)

Abstract:

An adsorbent named chitosan/pumice has been prepared for adsorptive removal of profenofos from aqueous solutions. The effects of solution pH, adsorbent dosage, contact time, ion strength and temperature on the adsorption of profenofos were investigated by batch experiments. The immobilization of chitosan was characterized by SEM, TGA, elemental analysis, FT-IR, XRD and XRF. The resultsshow that the chitosan loaded on pumice accounts for 8.69% of the amount of adsorbent; the adsorbent can be employed at pH 3.0~7.0 for quantitative adsorption rate(>90%); the adsorption for profenofos is hardly influenced by ion strength, and slightly decreases with temperature increase. Under the condition of 25 ℃, pH=7.0, 40 mg/L for the concentration of profenofos and 0.7 g/L for dose of chitosan/pumice, the adsorption equilibrium time is 90 min and the maximum adsorption rate of profenofos is 93.3%(53.4 mg/g for adsorbing capacity). The adsorbent can be reused at least three consecutive times with about 12% decrease on profenofos adsorption efficiency. This method for the adsorptive removal of profenofos from aqueous solution is simple, low cost, rapid and effective.

Key words: profenofos, chitosan/pumice, adsorption, removal