Degradation and Removal of Sulfadiazine from Waters by a Novel Polymer-supported Hydrous Manganese Dioxide(HMO)

doi:10.3969/j.issn.0251-0790.2012.05.015

Abstract

Abstract:

A new polymer-supported hydrous manganese dioxide(HMO-201) was prepared by impregnating HMO onto a porous polystyrene anion exchange resin(D201) through ion exchange, oxidation and reduction. The removal of sulfadiazine(SD) by HMO-201 was evaluated as a function of solution pH, background electrolyte NaCl and dissolved organic matter(DOM). HPLC-MS results showed that the removal of SD by HMO-201 was due to degradation rather than adsorption. The results indicated that the removal of 0.01 mmol/L SD reached 99.9% at pH=1.0 within 120 min. The SD degradation followed the pseudo-first-order kinetics. SD removal efficiency was little affected by ionic strength and DOM. With simulated SD wastewater containing NaCl and DOM, SD removal efficiency remained above 99% within 240 min for up to ten batches of continuous operation. Fixed-bed column experiment results of HMO-201 showed that SD remained undetected after 2000 bed volume simulated SD wastewater was passed through the column. HMO-201 was effective for the removal of sulfonamide antibiotics commonly found in the environment. It could be reused without a significant loss of capacity and thus has a great potential of real-world applications.

Key words: Hydrous manganese dioxide, Anion exchange resin, Sulfadiazine, Degradation

CLC Number:

X131.2
X52

TrendMD:

GAO Jun, SHENG G. Daniel, QIU Yu-Ping. Degradation and Removal of Sulfadiazine from Waters by a Novel Polymer-supported Hydrous Manganese Dioxide(HMO)[J]. Chem. J. Chinese Universities, 2012, 33(05): 948.

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Degradation and Removal of Sulfadiazine from Waters by a Novel Polymer-supported Hydrous Manganese Dioxide(HMO)

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