Adsorpsi logam Ni dan Cu pada limbah cair laboratorium kimia menggunakan biosorben batang jagung termodifikasi asam sitrat

Yulianti, Eny, Mahmudah, Rif'atul, Ma'rifah, Ainul and Azmiyani, Ulal (2019) Adsorpsi logam Ni dan Cu pada limbah cair laboratorium kimia menggunakan biosorben batang jagung termodifikasi asam sitrat. ALC, Vol 7 (1). ISSN e ISSN 2460 6871

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Abstract

Corn stalk contains 40-50% cellulose, 20-40% hemicellulose, 4-15% lignin which had potential as biosorbent in binding metal ions. In this study, demineralization and modification by adding citric acid (1.5 M and 2 M) of corn stalk were conducted to convert hydroxyl groups into carboxylic. Then, it was analyzed its functional groups using Boehm titration and FTIR. The modified corn stalk was applied directly to chemical laboratory liquid waste which contains multicomponent of heavy metal ions. By modifying the corn stalk, the number of hydroxyl and carboxylic groups increased, but the number of lactone group was constant. The success of the modification was characterized by the appearance of ester uptake at 1734 cm-1 and increased adsorption ability. The variations in the concentration of citric acid in modification corn stalk showed that biosorbent with addition 1.5 M citric acid had higher in the number of acid site than addition 2 M citric acid to absorb Ni and Cu.

Item Type:	Journal Article
Keywords:	corn stalk; citric acid; biosorbent
Subjects:	03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030505 Physical Organic Chemistry 03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl. Structural) > 030603 Colloid and Surface Chemistry 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and management > 050205 Environmental Management 10 TECHNOLOGY > 1002 Environmental Biotechnology > 100299 Environmental Biotechnology not elsewhere classified
Divisions:	Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User:	Eny Yulianti
Date Deposited:	03 Feb 2020 00:59

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