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


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


Polypyrrole-Grafted Coconut Shell Biological Carbon as a Potential Adsorbent for Methyl Tert-Butyl Ether Removal: Characterization and Adsorption Capability - Download this document for free, or read online. Document in PDF available to download.

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

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





Author: Shanshan Li 1, Keke Qian 1, Shan Wang 1, Kaiqiang Liang 2 and Wei Yan 1,*

Source: http://mdpi.com/



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