A simulation study of the removal efficiency of granular activated carbon on cadmium and lead

Jusoh, Ahmad; Lam, Su Shiung; Ali, Nora’aini; Noor, Mohd Jamaludin Md

doi:10.1016/j.desal.2006.04.048

Cited by 170 publications

(80 citation statements)

References 9 publications

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“…The most widely used methods to remove heavy metals are chemical or electrochemical precipitation (Lai and Sheng, 2003;Mahvi, 2008). Adsorption process using activated carbon, widely used as an adsorbent, is among the most effective techniques for heavy metals removal from waste streams (Jusoh et al, 2007). In the last decades, there have been a great trend for using of low cost absorbents and different studies have demonstrated that natural agents have high removal capacity for divalent heavy metal ions (Ayyappana et al, 2005;Carrillo-Morales et al, 2001;Corami et al, 2008;Inglezakis et al, 2007;Naseem and Tahir, 2001).…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metals from paint industry’s wastewater using Leca as an available adsorbent

Malakootian

Nouri²,

Hossaini

2009

Int. J. Environ. Sci. Technol.

142

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ABSTRACT:The ability of light expanded clay aggregate to remove lead and cadmium from paint industry's effluents was studied at different levels of adsorbent, contact time and pH in April 2008. For this purpose, lead and cadmium removal from paint industry effluents were studied in batch reactors. lead and cadmium measurements have been taken with non-flame atomic absorption techniques and test methods were adapted from 19 th. Ed. of standard methods for the examination of water and wastewater. In this study, different amounts of Leca (1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 g/L) were investigated. The amount of adsorbed lead and cadmium exposure to Leca increased from 1.41 to 3 mg/g and 0.22 to 0.75 mg/g, respectively. The maximum removal efficiency for Pb was 93.75 % at pH = 7 and exposure to 10 g/L of Leca, while for cadmium, it was nearly 89.7 % at the same condition. In this study, adsorption process of lead and cadmium was fitted with Freundlich adsorption isotherm (R 2 Pb = 0.97 and R 2 Cd = 0.98). The sufficient contact time was deemed 1-2 h for lead and cadmium. According to the results, Leca is recommended as a low cost and available adsorbent to remove lead and cadmium from industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

Removal of heavy metals from paint industry’s wastewater using Leca as an available adsorbent

Malakootian

Nouri²,

Hossaini

2009

Int. J. Environ. Sci. Technol.

142

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“…Various improved and innovative methods such as reverse osmosis, precipitation, coagulation, ion exchange, solvent extraction, adsorption, membrane filtration, ultra-filtration and photoreduction have been developed to remove metal pollutants from contaminated water and wastewater (Bailey et al 1999;Barron-Zambrano et al 2002;Chen and Wang 2000;Hunsom et al 2005;Kentish and Stevens 2001;Pacheco et al 2006). Among the above-mentioned processes, adsorption plays a pivotal role in removing metals from the aqueous phase using various biomaterial sorbents, algae (Holan et al 1993), fungi, sugar cane bagasse (Cerino Córdova et al 2011;Peterlene et al 1999), rice husk, wheat barn (Nouri et al 2007), pine bark, olive cake (Doyurum and Celik 2006), coconut husk, chitin (Benguella and Benaissa 2002), ash, activated carbon (Jusoh et al 2007;Onundi et al 2011;Zavvar Mousavi and Seyedi 2011), etc. Clays, zeolite, calcite, manganese nodule residue (Agrawal and Sahu 2006;Tashauoei et al 2010), perlite (Hasan et al 2006) and peat (Gabaldon et al 2006) have also been employed to remove metals from the water phase.…”

Section: Introductionmentioning

confidence: 99%

Identification of potential soil adsorbent for the removal of hazardous metals from aqueous phase

Bhakta

Munekage

2012

Int. J. Environ. Sci. Technol.

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The present study attempted to identify the efficient hazardous metal-removing sorbent from specific types of soil, upper and middle layer shirasu, shell fossil, tuff, akadama and kanuma soils of Japan by physicochemical and metal (arsenic, cadmium and lead) removal characterizations. The physico-chemical characteristics of soil were evaluated using X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy techniques, whereas metal removal properties of soil were characterized by analyzing removal capacity and sorption kinetics of potential metal-removing soils. The chemical characteristics revealed that all soils are prevalently constituted of silicon dioxide (21.83-78.58 %), aluminum oxide (4.13-38 %) and ferrous oxide (0.835-7.7 %), whereas calcium oxide showed the highest percentage (65.36 %) followed by silicon dioxide (21.83 %) in tuff soil. The results demonstrated that arsenic removal efficiency was higher in elevated aluminum oxide-containing akadama (0.00452 mg/L/g/h) and kanuma (0.00225 mg/L/ g/h) soils, whereas cadmium (0.00634 mg/L/g/h) and lead (0.00693 mg/L/g/h) removal efficiencies were maximum in elevated calcium oxide-containing tuff soil. Physicochemical sorption and ion exchange processes are the metal removal mechanisms. The critical appraisal of three metal removal data also clearly revealed cadmium [ lead [ arsenic order of removal efficiency in different soils, except in tuff and akadama soils followed by lead [ cadmium [ arsenic. It clearly signified that each type of soil had a specific metal adsorption affinity which was regulated by the specific chemical composition. It may be concluded that akadama would be potential arsenicremoving and tuff would be efficient cadmium and leadremoving soil sorbents.

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“…The latter is one of the most effective and economical techniques used to remove heavy metals 7 . Different adsorbents have been employed in the process of adsorption: activated charcoal 8 , kaolinite 9 , natural and synthetic zeolites 10 , rice husks 11 , clays 12 , among others. Clays have properties such as high cation exchange capacity, they are easily available and low cost adsorbents, which can be recycled and reused for subsequent cycles.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cadmium(II) and Lead(II) ions from aqueous phase on sodic bentonite

et al. 2013

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This paper describes the adsorption of Cd 2+ and Pb 2+ ions using sodic bentonite clay type Fluidgel modified. The Fluidgel before and after chemical modification and thermal activation was characterized by different techniques including X-ray diffraction, thermal analysis, Fourier transform infrared, surface area, helium pycnometry, cation exchange capacity and scanning electron microscopy. Pseudo-first order, pseudo-second order and intra-particle diffusion models were used to analyze the kinetic curves. Equilibrium data were analyzed using Langmuir and Freundlich models. The thermodynamic study indicated that lead adsorption process is endothermic and interactions between clays and solutions of lead occurred spontaneously, while cadmium adsorption revealed an exothermic and spontaneous nature. The maximum removal efficiencies were 97.62% for Cd(II) using Fluidgel modified chemically and 91.08% for lead by Fluidgel modified chemical and thermally.

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A simulation study of the removal efficiency of granular activated carbon on cadmium and lead

Cited by 170 publications

References 9 publications

Removal of heavy metals from paint industry’s wastewater using Leca as an available adsorbent

Removal of heavy metals from paint industry’s wastewater using Leca as an available adsorbent

Identification of potential soil adsorbent for the removal of hazardous metals from aqueous phase

Removal of Cadmium(II) and Lead(II) ions from aqueous phase on sodic bentonite

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