Rapid removal of caffeine in aqueous solutions by peroxymonosulfate oxidant activated with cobalt ion-Reference-Cited by-同舟云学术

Rapid removal of caffeine in aqueous solutions by peroxymonosulfate oxidant activated with cobalt ion

Published:2015-05-19 Issue:3 Volume:72 Page:478-483
ISSN:0273-1223
Container-title:Water Science and Technology
language:en
Short-container-title:

Author:

Guo Yunleiyu¹,Shen Tingting²,Wang Chen²,Sun Jing²,Wang Xikui¹

Affiliation:

1. School of Chemical and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, China

2. School of Environmental Science and Engineering, Qilu University of Technology, Jinan 250353, China

Abstract

The removal of caffeine (CAF) in aqueous solution by peroxymonosulfate oxidant activated with cobalt ion was investigated under a variety of operating conditions. The effects of various operating parameters, such as oxone and Co2+ concentrations, pH value, and the coexistence of dissolved organic matter and inorganic anions on the removal of CAF have been investigated. The removal efficiency increased with the increase in the concentrations of oxone and Co2+ ion added. The additions of chloride, bicarbonate, and sodium humate have negative effects on the removal of CAF. Near-neutral condition (5.0 < pH < 7.0) is favorable for the removal of CAF. Based on our experiments, 100% degradation of 50 mg/L CAF can be achieved within 4 minutes under the conditions of 1.00 mM oxone and 0.10 mM Co2+ ion at pH 5.0–7.0.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

Link

http://iwaponline.com/wst/article-pdf/72/3/478/467307/wst072030478.pdf

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