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Int. J. Environ. Res. Public Health 2017, 14(2), 113; doi:10.3390/ijerph14020113

Polypyrrole-Grafted Coconut Shell Biological Carbon as a Potential Adsorbent for Methyl Tert-Butyl Ether Removal: Characterization and Adsorption Capability

1
Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
Research Institute of Yanchang Petroleum (GROUP) Co. Ltd., Xi’an 710075, China
*
Author to whom correspondence should be addressed.
Academic Editor: Emmanuelle Vulliet
Received: 28 November 2016 / Revised: 28 December 2016 / Accepted: 4 January 2017 / Published: 24 January 2017
(This article belongs to the Special Issue Organic Micro-Pollutants and Human Exposure)
View Full-Text   |   Download PDF [4711 KB, uploaded 24 January 2017]   |  

Abstract

Methyl tert-butyl ether (MTBE) has been used as a common gasoline additive worldwide since the late twentieth century, and it has become the most frequently detected groundwater pollutant in many countries. This study aimed to synthesize a novel microbial carrier to improve its adsorptive capacity for MTBE and biofilm formation, compared to the traditional granular activated carbon (GAC). A polypyrrole (PPy)-modified GAC composite (PPy/GAC) was synthesized, and characterized by Fourier transform infrared spectroscopy (FT-IR) and Brunauer-Emmett-Teller (BET) surface area analysis. The adsorption behaviors of MTBE were well described by the pseudo-second-order and Langmuir isotherm models. Furthermore, three biofilm reactors were established with PPy/GAC, PPy, and GAC as the carriers, respectively, and the degradation of MTBE under continuous flow was investigated. Compared to the biofilm reactors with PPy or GAC (which both broke after a period of operation), the PPy/GAC biofilm column produced stable effluents under variable treatment conditions with a long-term effluent MTBE concentration <20 μg/L. Pseudomonas aeruginosa and Acinetobacter pittii may be the predominant bacteria responsible for MTBE degradation in these biofilm reactors. View Full-Text
Keywords: polypyrrole; active carbon; PPy/GAC; methyl tert-butyl ether; carrier; biological filtration polypyrrole; active carbon; PPy/GAC; methyl tert-butyl ether; carrier; biological filtration
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Li, S.; Qian, K.; Wang, S.; Liang, K.; Yan, W. Polypyrrole-Grafted Coconut Shell Biological Carbon as a Potential Adsorbent for Methyl Tert-Butyl Ether Removal: Characterization and Adsorption Capability. Int. J. Environ. Res. Public Health 2017, 14, 113.

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