Removal of Cu and Pb from electroplating wastewater using tartaric acid modified rice husk

Wong, K. K.; Lee, Chnoong Kheng; Low, Kun She; Haron, Md. Jelas

doi:10.1016/s0032-9592(03)00094-3

Cited by 153 publications

(72 citation statements)

References 15 publications

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“…Among these methods, adsorption, being combined with appropriate desorption step, is an effective and versatile method and can avoid the disposal of large scale sludge. Several low-cost adsorbents, such as activated carbon, rice husk, montmorillonite, and natural bentonite, have been proposed to remove Cu 2+ (Bhattacharyya and Gupta, 2007;Wong et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

Wang

Kang

Liu

et al. 2009

Journal of Environmental Sciences

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A novel adsorbent (AMPS-silica) was synthesized by bounding AMPS (2-acrylamido-2-methylpropanesulfonic acid) onto silica surface, which functioned with γ-methacryloxypropyltrimethoxysilane reagent. The adsorbent was characterized by nitrogen adsorption/desorption measurement, thermogravimetric analysis (TGA) and potentiometric titration analysis. The TGA result indicated that the surface modification reactions introduced some organic functional groups onto the surface of silica. The surface area of AMPSsilica was 389.7 m 2 /g. The adsorbent was examined for copper ion removal in series of batch adsorption experiments. Results showed that the adsorption of Cu 2+ onto AMPS-silica was pH dependent, and the adsorption capacity increased with increasing pH from 2 to 6. The adsorption kinetics showed that Cu 2+ adsorption was fast and the data fitted well with a pseudo second-order kinetic model. The adsorption of Cu 2+ onto AMPS-silica obeyed both Freundlich and Langmuir isotherms, with r 2 = 0.993 and r 2 = 0.984, respectively. The maximum Cu 2+ adsorption capacity was 19.9 mg/g. The involved mechanism might be the adsorption through metal binding with organic functional groups such as carboxyl, amino and sulfonic groups. Cu 2+ loaded on AMPS-silica could be desorbed in HNO 3 solution, and the adsorption properties remain stable after three adsorption-desorption cycles.

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Section: Introductionmentioning

confidence: 99%

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

Wang

Kang

Liu

et al. 2009

Journal of Environmental Sciences

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“…All these different mixtures were stirred and sampled at various desired interval time and centrifuged (Hamadi et al, 2004;Wong et al, 2003a). The supernatant solutions were collected for chemical analysis by using spectrophotometer.…”

Section: Methodsmentioning

confidence: 99%

Adsorption Study of Electric Arc Furnace Slag for the Removal of Manganese from Solution

Beh¹

2010

American Journal of Applied Sciences

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Problem statement: Steel making slag from Electric Arc Furnace (EAF) is an abundant byproduct in Malaysia steel making industry. It has potential to be used for heavy metal removal from contaminated water or waste water. Approach: The aim of this study was to investigate the characteristic and behavior of manganese removal by using EAF slag for efficient metal removal. The removal characteristics of manganese were investigated in term of sorption kinetics and isotherm. The batch adsorption kinetics and isotherm studies were carried out at 28°C and ten grams of EAF slag was added into 1 L manganese solution of various concentrations of 10, 25, 50, 75, 100 and 120 mg L −1 . All these different mixtures were stirred and sampled at various desired times and centrifuged. The supernatant solutions were then collected for chemical analysis. Results: It was found that the EAF slag adsorption kinetics can be described well by the pseudo-2nd order kinetic model with fairly high correlation coefficients. The adsorption process obeyed the Langmuir isotherm model and the maximum uptake of the manganese from the solution is 2.31 mg L −1 g −1 of EAF slag used. Conclusion:From the study, it was concluded that the EAF slag can be an efficient adsorbent to remove manganese from both the solution and waste water.

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“…The same conclusion may be seen in Figure 9, which shows computed results of the Belter-Cussler-Hu equation (triangles) and those of the Bohart-Adams equation (filled circles). [29][30][31][32][33][34][35][36], nonlinear regression was used to fit the Belter-Cussler-Hu equation to experimental breakthrough data. Here we show that the GA is an effective alternative to the nonlinear regression approach.…”

Section: Belter-cussler-hu Equationmentioning

confidence: 99%

Biosorption Parameter Estimation with Genetic Algorithm

Chu

Xiao

Kim

et al. 2011

Water

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Abstract:In biosorption research, a fairly broad range of mathematical models are used to correlate discrete data points obtained from batch equilibrium, batch kinetic or fixed bed breakthrough experiments. Most of these models are inherently nonlinear in their parameters. Some of the models have enjoyed widespread use, largely because they can be linearized to allow the estimation of parameters by least-squares linear regression. Selecting a model for data correlation appears to be dictated by the ease with which it can be linearized and not by other more important criteria such as parameter accuracy or theoretical relevance. As a result, models that cannot be linearized have enjoyed far less recognition because it is necessary to use a search algorithm for parameter estimation. In this study a real-coded genetic algorithm is applied as the search method to estimate equilibrium isotherm and kinetic parameters for batch biosorption as well as breakthrough parameters for fixed bed biosorption. The genetic algorithm is found to be a useful optimization tool, capable of accurately finding optimal parameter estimates. Its performance is compared with that of nonlinear and linear regression methods.

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Removal of Cu and Pb from electroplating wastewater using tartaric acid modified rice husk

Cited by 153 publications

References 15 publications

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

Adsorption Study of Electric Arc Furnace Slag for the Removal of Manganese from Solution

Biosorption Parameter Estimation with Genetic Algorithm

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