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COCONUT COIR ACTIVATED CARBON- AN ADSORBEND FOR TEXTILE DYES AND TEXTILE DYE WASTE TREATMENT

KHAN, TAIMUR (2011) COCONUT COIR ACTIVATED CARBON- AN ADSORBEND FOR TEXTILE DYES AND TEXTILE DYE WASTE TREATMENT. Masters thesis, Universiti Teknologi Petronas.

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Abstract

Textile dyes have adverse effects on human beings and aquatic life. Textile dye waste is a potential source of surface and ground water contamination if it is not properly collected, treated and disposed of. The main objective of the research was to prepare activated carbon from an agricultural solid waste, coconut coir and to determine its effectiveness in removing textile dyes from aqueous solution and in textile dye waste treatment. The coconut coir activated carbon (CCAC) and a commercial activated carbon (CAC) were characterised in terms of ash content, bulk density, pH, pHzrc, surface area, micropore area, micropore volume, average pore diameter, surface morphology, surface acidic functional groups, basic sites and surface functional groups. The study was conducted in two phases: batch adsorption test and column test. In batch adsorption test, adsorption of four different classes of textile dyes, namely Acid Red 18 (AR 18), Disperse Red 343 (DR 343), Reactive Yellow 15 (RY 15) and Direct Blue 86 (DB 86) by CCAC and CAC were examined while in column test treatment of a textile dye waste by the CCAC was assessed. Batch adsorption test showed that extent of dye adsorption was dependent on dye concentration, contact time and pH. Equilibrium adsorption for AR 18, DR 343, RY 15 and DB 86 by CCAC and CAC was attained in 4, I, 4 and 2 h, respectively, and maximum adsorption occurred at pH 2 for all four textile dyes. Equilibrium adsorption data at pH 2 for CCAC and CAC were well described by the Langmuir and Freundlich isotherm models. Langmuir and Freundlich isotherm constant Q0 [48.5 (AR 18), 51.0 (DR 343), 32.0 (RY 15) and 8.3 (DB 86) for CCAC, and 37.3 (AR 18), 41.6 (DR 343), 22.0 (RY 15) and 6.5 (DB 86) for CAC] and K1 [25.7 (AR 18), 3.6 (DR 343), 13.0 (RY 15) and 0.86 (DB 86) for CCAC, and 12.0 (AR 18), 2.9 (DR 343), I 0.0 (RY 15) and 0.50 (DB 86) for CAC] indicated that CCAC has higher adsorption capacity than that of CAC for all four textile dyes. Adsorption of the dyes by both CCAC and CAC followed the pseudo-second-order kinetic model.

Item Type: Thesis (Masters)
Academic Subject : Academic Department - Civil Engineering - Water and environment - Water
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 29 Aug 2013 12:21
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/6717

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