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Title (Primary) Chemically modified maize cobs waste with enhanced adsorption properties upon methyl orange and arsenic
Author Elizalde-González, M.P.; Mattusch, J.; Wennrich, R.
Journal Bioresource Technology
Year 2008
Department ANA
Volume 99
Issue 11
Page From 5134
Page To 5139
Language englisch
Keywords Methyl orange; Arsenic; Maize; Chemical modification
Abstract The surface chemistry of maize naturasorbent was altered in this work by the modifying agents: phosphoric acid and different amines (triethanolamine, diethylenetriamine and 1,4-diaminobutane). Removal of methyl orange (25 mg l-1) was <50% by maize corn cobs modified by phosphorylation and higher by the quaternized samples: 68% with the 1,4-diaminobutane and 73% with the diethylenetriamine modificators. Adsorption of arsenite by the samples modified with phosphoric acid/ammonia was 11 µg g-1, which corresponds to 98% removal from a 550 µg As l-1 solution for an adsorbent dose of 50 mg ml-1. The samples modified by phosphoric acid/urea removed 0.4 µg g-1 arsenate from a 300 µg As l-1 solution. Adsorption of methyl orange, arsenite and arsenate was superior by the chemically modified maize cobs judged against the initial naturasorbent. For comparison, removal by the commercial anion exchanger was 100% for methyl orange, 45% (5 µg g-1) for arsenite and 99% (5 µg g-1) for arsenate.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=903
Elizalde-González, M.P., Mattusch, J., Wennrich, R. (2008):
Chemically modified maize cobs waste with enhanced adsorption properties upon methyl orange and arsenic
Bioresour. Technol. 99 (11), 5134 - 5139