Lead removal in fixed-bed columns by zeolite and sepiolite

Turan, Mustafa; Mart, Ugur; Yüksel, Baris; Çelik, M. S.

doi:10.1016/j.chemosphere.2005.02.036

Cited by 74 publications

(47 citation statements)

References 13 publications

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“…; T = 30°C. Indeed, for an aqueous lead concentration of 200 mg L -1 , an adsorbent dosage of 5 g L -1 and at pH 3.6, the removal capacity of BGMW is relatively important compared with a Turkish clinoptilolite (Turan et al 2005), Ecuadorian heulandites and clinoptilolite (Calvo et al 2009) and chemically modified Chinese zeolite (Han et al 2006). Because of the relative scarcity of dynamic assays, this comparison has been extended to batch systems.…”

Section: Effect Of Influent Lead Concentrationmentioning

confidence: 99%

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Mlayah

Jellali

2014

Int. J. Environ. Sci. Technol.

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Lead removal from synthetic solutions and real wastewater by Bianco Gioia marble wastes as abundant, renewable and eco-friendly materials was studied under different experimental conditions in a continuous stirring tank reactor. These marble wastes were found to be very efficient in removing lead for several experimental situations. Indeed, for initial aqueous pH values higher than 3.6, a lead removal efficiency of about 100 % was achieved even for high aqueous concentrations (200 mg L -1 ), important feeding flow rates (60 mL min -1 ) and low marble waste dosage (2 g L -1 ). The best removal capacity (175.7 mg g -1 ) was obtained for an initial lead concentration of 200 mg L -1 , a marble waste dose of 5 g L -1 and an aqueous pH of 5. Even using the real wastewater with low aqueous pH (1.1), lead was also completely removed using 20 g L -1 of the tested marble wastes. According to the energy-dispersive spectroscopy and X-ray diffraction analyses, lead removal seems to be controlled by both precipitation as cerussite (PbCO 3 ) and hydrocerussite (Pb 3 (CO 3 ) 2 (OH) 2 ), and adsorption onto the surface particles through cation exchange and complexation. The proposed low-cost material efficiently removes lead present in synthetic solutions and real wastewaters and constitutes an interesting environmental management option.

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Section: Effect Of Influent Lead Concentrationmentioning

confidence: 99%

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Mlayah

Jellali

2014

Int. J. Environ. Sci. Technol.

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“…Some of desorption approaches, such as acid washing with HCl, HNO 3 and H 2 SO 4 have been developed and adopted as standard methods for the pretreatment of zeolites and clays [10,14] (in order to remove surface dust and impurities) or as an activation process (to increase the specific surface area) [15][16][17]. Recently, different chemical reagents (NaCl, KCl, HCl, NaNO 3 , NaCO 3 , and NaOH) were applied for heavy metal extraction from natural minerals [14,[18][19][20][21]. The purification and regeneration processes enable multiple use of the same material.…”

Section: Introductionmentioning

confidence: 99%

The effect of different extractants on lead desorption from a natural mineral

Đolić

Rajaković-Ognjanović

Marković

et al. 2015

Applied Surface Science

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“…Possible application of natural clinoptilolite in wastewater treatment processes has been studied extensively for ammonia adsorption [4,5], heavy metals uptake [6][7][8], and for removal of a broad range of volatile organic compounds (VOCs) including BTEX compounds [9,10] in batch mode and fixed bed reactors.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of BTEX on Surfactant Modified Granulated Natural Zeolite Nanoparticles: Parameters Optimizing by Applying Taguchi Experimental Design Method

Seifi

Torabian

Kazemian

et al. 2011

CLEAN Soil Air Water

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In this paper, a novel adsorbent developed by means of granulating of natural zeolite nanoparticles (i.e., clinoptilolite) was evaluated for possible removal of the petroleum monoaromatics (i.e., benzene, toluene, ethylbenzene, and xylene, BTEX). To do this, the natural zeolite was ground to produce nanosized particulate, then modified by two cationic surfactants and granulated. The effect of various parameters including temperature, initial pH of the solution, total dissolved solids (TDS), and concentration of a competitive substance (i.e., methyl tert-butyl ether, MTBE) were studied and optimized using a Taguchi statistical approach. The results ascertained that initial pH of the solution was the most effective parameter. However, the low pH (acidic) was favorable for BTEX adsorption onto the developed adsorbents. In this study, the experimental parameters were optimized and the best adsorption condition by determination of effective factors was chosen. Based on the S/N ratio, the optimized conditions for BTEX removal were temperature of 408C, initial pH of 3, TDS of 0 mg/L, and MTBE concentration of 100 mg/L. At the optimized conditions, the uptake of each BTEX compounds reached to more than 1.5 mg/g of adsorbents.

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Lead removal in fixed-bed columns by zeolite and sepiolite

Cited by 74 publications

References 13 publications

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

The effect of different extractants on lead desorption from a natural mineral

Adsorption of BTEX on Surfactant Modified Granulated Natural Zeolite Nanoparticles: Parameters Optimizing by Applying Taguchi Experimental Design Method

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