Effect of functional groups of biochars and their ash content on gaseous Methyl tert-butyl ether (cas 1634-04-4) removal

Add time:07/26/2019    Source:sciencedirect.com

Air pollution is considered a major problem, especially the pollution from transportation. Methyl tert-butyl ether (cas 1634-04-4) (MTBE) is commonly used as a gasoline additive. MTBE is obtained from incomplete combustion of gasoline and causes environmental problems. Biochars derived from agricultural waste, including rice husk, bone, corncob, bamboo, sawdust and bagasse, were used for methyl tert-butyl ether (MTBE) removal. It was found that bagasse biochar had the highest maximum adsorption capacity (Qmax) (8.26 mg g−1), while bone biochar had the lowest (3.51 mg g−1). It might be due to the fact that bone biochar had the highest ash content and functional groups of bone biochar surface was mainly phosphate and ether groups. These functional groups cannot react with MTBE. While bagasse biochar contained less ash content and had the highest functional groups of ester (CO) and carbonyl (CO) groups. These functional groups can bind with MTBE effectively. Therefore, functional groups on materials and their ash content can be used as a criteria for selecting the materials for MTBE removal.

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