Removal of Pb(II) from aqueous/acidic solutions by using bentonite as an adsorbent

Ullah, Shafqat; Tahir, S.S.

doi:10.1016/s0043-1354(01)00130-0

Cited by 492 publications

(243 citation statements)

References 18 publications

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“…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). Different kinds of clays for removal of metal ions from aqueous solution have been studied and many factors effecting the absorbability of dissolved element, including chemical form of metal, pH, contact time, metal concentrations, presence of competing adsorbents, amount of sorbent, temperature, particle size and others have been distinguished (Benjamin et al, 1982;Farrah and Pickering, 1977;Johnson, 1990;Orumwenese Faraday, 1996).…”

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.

144

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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.

144

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“…Moreover, the material should be inexpensive. For that reason, many different materials have been studied as possible sorbents, i.e., kaolin (Arias et al 2002), perlite (Mathialagan and Viraraghavan 2002), bentonite (Naseem and Ve Tahir 2001), fly ash (Panday et al 1984;Bayat 2002), zeolites (Franus et al 2015), and even steel converter and blast furnace slag (Ortiz et al 2001;Johansson 1999). More and more often, low-cost materials are investigated as adsorbents (Salam et al 2011;Hegazi 2013;Mikoda et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

et al. 2017

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Sorption experiments of the Cd, Zn, and Pb(II) ions from aqueous solutions on waste dolomite powder were investigated. Waste dolomite powder is inconvenient during storage due to fine particle size; therefore, its practical application is needed. The sorption experiments were conducted with variables: initial metal concentration (500, 1000, and 2000 mg/dm3 ) in single-and multi-element solutions, adsorbent dose (0.5, 1, and 2 g), and contact time (45, 90, and 180 min). Results showed that dolomite powder removed all ions from experimental solutions. For multi-element solution, Pb(II) was adsorbed almost in 100% at the initial concentration equal to 2000 mg/dm 3 . For Cd and Zn, sorption properties decreased with the increase in the initial metal concentration and the maximum values at the initial metal concentration of 500 mg/dm 3 were 42 and 47%, respectively. The results suggest that waste dolomite powder can be considered for application as sorbent in wastewater purification.

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“…Among all the water pollutants, heavy metal ions, including Pb(II), Cd(II), Zn(II), Ni(II) and Hg(II), have high toxicity and non-biodegradable properties and can cause severe health problems in animals and human beings. For instance, lead poses several risks to human health, causing insomnia, pain, dizziness, anemia, irritability, muscle weakness, hallucinations, and renal damage [1].…”

Section: Introductionmentioning

confidence: 99%

Graphene materials for lead (II) extraction: an equilibrium study

2017

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Abstract. The present paper describes a study on the adsorption of lead (II) ions on graphene materials obtained via exfoliation of a hydrolyzed expanded graphite intercalation compound. An equilibrium studies were performed implementing the empirical Freundlich and Langmuir isotherm models. It was found that all the isotherms are fitted well by those models, indicating the efficiency of the graphene materials as an adsorbent of heavy metals. The applicability of the two isotherms for sorption processes shows that both monolayer adsorption and heterogeneous energetic distribution of active sites on the adsorbent surface may take place. The maximum experimental lead (II) adsorption capacities of the materials under study -fewlayered oxidized graphene suspension, multi-layered graphene paste, and few-layered graphene paste -were found to be 850, 230 and 170 mg/g, respectively. Due to the high sorption characteristics and unique physical and chemical properties of these materials, the adsorption technologies developed herein can act as good sustainable options for the future in heavy metal removal from industrial effluents.

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Removal of Pb(II) from aqueous/acidic solutions by using bentonite as an adsorbent

Cited by 492 publications

References 18 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

Waste dolomite powder as an adsorbent of Cd, Pb(II), and Zn from aqueous solutions

Graphene materials for lead (II) extraction: an equilibrium study

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