Evaluation of new chemically modified coconut shell adsorbents with tannic acid for Cu (II) removal from wastewater

ABSTRACT The adsorption of Cu (II) from aqueous solutions using coconut shell modified powder was investigated in batch experiments. The surface charge of the adsorbent was determined. The points of zero charge (PZC) of the adsorbents (pH PZC ) were 4.5, 2.0, and 2.0 to raw coconut (RC), raw coconut...

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Published in:	Journal of applied polymer science Vol. 131; no. 18; pp. 9087 - n/a
Main Authors:	de Oliveira Sousa Neto, Vicente, Melo, Diego Quadros, de Oliveira, Talles Cardoso, Nonato, Raimundo, Teixeira, P., Silva, Marcos Antônio Araújo, Nascimento, Ronaldo Ferreira do
Format:	Journal Article
Language:	English
Published:	Hoboken, NJ Blackwell Publishing Ltd 15-09-2014 Wiley Wiley Subscription Services, Inc
Subjects:	Adsorbents Adsorption Agronomy. Soil science and plant productions Applied sciences Aqueous solutions Biological and medical sciences Cellulose and derivatives cellulose and other wood products Copper Equilibrium conditions Exact sciences and technology fibers Fundamental and applied biological sciences. Psychology General agronomy. Plant production Glass transition temperature kinetics Materials science Natural polymers Papal visits Physicochemistry of polymers Pollution Polymers Raw Shells Surface charge Surface chemistry Tannic acid theory and modeling Use of agricultural and forest wastes. Biomass use, bioconversion Wastewater treatment Wastewaters Water treatment and pollution Tannic acid Copper II Surface reaction adsorption fibers Liquid solid adsorption Adsorption isotherm Coconut Metal ion Lignocellulosics Experimental study Modeling Organic adsorbent theory and modeling Kinetic model Pollutant Chemical modification Polyphenol cellulose and other wood products Agricultural waste Husk (fruit) Waste water purification kinetics
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Summary:	ABSTRACT The adsorption of Cu (II) from aqueous solutions using coconut shell modified powder was investigated in batch experiments. The surface charge of the adsorbent was determined. The points of zero charge (PZC) of the adsorbents (pH PZC ) were 4.5, 2.0, and 2.0 to raw coconut (RC), raw coconut alkalized (RCA), and coconut shell modified with tannic acid (TCA) adsorbent, respectively. Batch experiments were performed under kinetic and equilibrium conditions. The kinetic data were analyzed using a pseudo second‐order, and Elovich equation. Adsorption equilibrium data were investigated using the Langmiur, Freundlich, Temkin, and Dubinin–Raduschevich (D–R) isotherm models. It has been found that chemically modified coconut shell (TAC) affected performance when compared with unmodified coconut shell (RC). Kinetic studies showed that the adsorption followed a pseudo‐second‐order rate model. Biosorption kinetics of Cu(II) on the adsorbent TCA was rapid such that almost 90% of Cu(II) were adsorbed within 80 min. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40744.
Bibliography:	istex:38A74153AEA5168C2C9ADC6B589F2CEE1A2BB0DB ark:/67375/WNG-K59RN1SR-6 ArticleID:APP40744 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0021-8995 1097-4628
DOI:	10.1002/app.40744