☆ 4.7 Article

Synthesis, characterization and application of cellulose/polyaniline nanocomposite for the treatment of simulated textile effluent

CELLULOSE (2013)

Journal

CELLULOSE

Volume 20, Issue 3, Pages 1153-1166

Publisher

SPRINGER

DOI: 10.1007/s10570-013-9910-x

Keywords

Cellulose; Nanocomposite; Polyaniline; Reactive dyes; Response surface methodology

Funding

National Research Foundation of Korea (NRF)
government (MEST) [2011-0020202]

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Abstract

The aim of the study was to analyze the potential application of cellulose/polyaniline (Ce/Pn) nanocomposite for the treatment of synthetic reactive dye bath effluent. The Ce/Pn composite was synthesized by chemical oxidative polymerization of aniline. A central composite experimental design, a most popular design of response surface methodology, was applied to optimize the level of variables, namely, cellulose and polyaniline, to get the best response on dye removal. Biological transmission electron microscopy studies reveal that the cellulose particles were uniformly distributed on the nanocomposite. The results of the batch experiment studies indicate that Ce/Pn nanocomposite removed 95.9, 91.9, 92.7, and 95.7 % of RBBR, RO, RV, and RBK, respectively, and it decolorized 82 % of dye bath effluent. However, the presence of the salts reduced the adsorption rate of the dyes. The Langmuir model and pseudo first-order rate expression exhibited satisfactory fit to adsorption data of single component.

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Photocatalytic degradation of ciprofloxacin by MMT/CuFe2O4 nanocomposite: characteristics, response surface methodology, and toxicity analyses

Tariq J. Al-Musawi, Nezamaddin Mengelizadeh, Abeer I. Alwared, Davoud Balarak, Reza Sabaghi

Summary: The photocatalytic degradation of ciprofloxacin (CIP) was investigated by loading spinel ferrite copper (CuFe2O4) nanoparticles onto montmorillonite (MMT) under UV light irradiation. Response surface methodology (RSM) was employed to optimize the experimental parameters, and a maximum efficiency of 83.75% was achieved under the following conditions: pH 3, CIP concentration 32.5 mg/L, MMT/CuFe2O4 dose 0.78 g/L, and irradiation time 47.50 min. The photocatalysis process involved the generation of hydroxyls ((OH)-O-center dot), superoxide (O-center dot(2)-) radical, electrons (e(-)), and holes (h(+)), as confirmed by radical trapping experiments. The MMT/CuFe2O4 exhibited excellent recyclability and stability, with a low rate drop of less than 10% during six consecutive reaction cycles. The toxicity of the treated solution significantly decreased after photocatalysis, as evaluated using Daphnia Magna. Comparing the degradation results under UV and visible light showed similar outcomes when the reaction time ended, and particle activation easily occurred when pollutant mineralization exceeded 80%.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)