Removal of Zn+2 and Ni+2 by adsorption in a fixed bed of wheat straw

Doan, Huu; Lohi, Ali; Dang, Viet-Cuong; Dang-Vu, Trong

doi:10.1016/j.psep.2008.04.004

Cited by 70 publications

(29 citation statements)

References 36 publications

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“…Teff has very high amount of calcium content and is an excellent source of vitamin C. In the literature, a number of agricultural residues have been tested as adsorbent for chromium removal (Ali and Gupta 2006;Ali 2010Ali , 2012Ebrahimi et al 2015;Kunquan et al 2015;Shiow-Tien et al 2014;Venkatesan et al 2014;Doan et al 2008;Martinez et al 2015;Huang et al 2015;Santos et al 2016;Ali 2012;Elwakeel 2010). However, only few studies have been reported on use of teff straw as an adsorbent because of its less familiarity in scientific research world (Mulu 2013;Bezuayehu et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Chemical treatment of teff straw by sodium hydroxide, phosphoric acid and zinc chloride: adsorptive removal of chromium

Wassie

Srivastava

2016

Int. J. Environ. Sci. Technol.

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In this study, teff (Eragrostis tef) straw has been chemically treated and tested as an adsorbent for Cr(VI) removal. Chemically treatment of teff straw was done by NaOH, H 3 PO 4 and ZnCl 2 solutions. Scanning electron micrograph and X-ray diffraction were used for anatomical characterization, whereas Fourier transform infrared spectroscopy was used for surface change characterization of adsorbents. Effects of different experimental parameters like pH (2-12), initial Cr(VI) concentration (100-900 mg/L), adsorbent dose (2.5-20 g/L), contact time (15-360 min) and temperature (288-318 K) were studied. Temperature increment was found to stimulate the adsorption process. Langmuir isotherm was found to give better representation over wide range of temperature for untreated, H 3 PO 4 -as well as ZnCl 2 -treated teff straw, and Freundlich isotherm best represented the isotherm data for NaOH-treated teff straw. Maximum Cr(VI) adsorption capacity of untreated, NaOH-, H 3 PO 4 -and ZnCl 2 -treated teff straw was found to be 86.1, 73.8, 89.3 and 88.9 mg/g, respectively. Respective values of average effective diffusion coefficient (D e ) were found to be 2.8 9 10 -13 , 2.59 9 10 -14 , 1.32 9 10 -13 and 1.14 9 10 -13 m 2 /s, respectively. The negative value of DG o for all the adsorbents indicates Cr(VI) spontaneous adsorption. Isosteric heat of adsorption (DH st,a ) was found to vary with surface coverage (h). DH st,a increased for untreated, H 3 PO 4 -and ZnCl 2 -treated teff straw, and decreased steadily with h for NaOH-treated teff straw.

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Section: Introductionmentioning

confidence: 99%

Chemical treatment of teff straw by sodium hydroxide, phosphoric acid and zinc chloride: adsorptive removal of chromium

Wassie

Srivastava

2016

Int. J. Environ. Sci. Technol.

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“…When it was modified using PEI þ glutaraldehyde, formaldehyde, and NaOH, the adsorption capacity increased to 68.64, 50.64, and 50.04 mg/g, respectively. Doan et al [69] modified the wheat straw using H 2 SO 4 solution and washing with distilled water. Vazquez et al [71] studied the removal of zinc from aqueous solution by treating Pinus pinaster bark with acidified formaldehyde solution.…”

Section: Biomass Modificationsmentioning

confidence: 99%

“…When the temperature is too high, there is a decrease in metal sorption due to distortion of some sites of the cell surface available for metal biosorption [67]. Also Doan et al [69] investigated the effect of temperature on percentage removal of zinc using wheat straw. With increase in temperature the percentage removal of zinc increased.…”

Section: Effect Of Temperaturementioning

confidence: 99%

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Application of Agro‐Based Biomasses for Zinc Removal from Wastewater – A Review

Kumar

Balomajumder

Mondal

2011

CLEAN Soil Air Water

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Zinc remediation of aqueous streams is of special concern due to its highly toxic and persistent nature. Conventional treatment technologies for the removal of zinc are not economical and further generate huge quantity of toxic chemical sludge. Biosorption is emerging as a potential alternative to the existing conventional technologies for the removal of metal ions from aqueous solutions. Mechanisms involved in the biosorption process include chemisorption, complexation, adsorption-complexation on surface and pores, ion exchange, microprecipitation, heavy metal hydroxide condensation onto the bio surface, and surface adsorption. Biosorption largely depends on parameters such as pH, the initial metal ion concentration, biomass concentration, presence of various competitive metal ions in solution, and to a limited extent on temperature. Biosorption using biomass such as agricultural wastes, industrial residues, municipal solid waste, biosolids, food processing waste, aquatic plants, animal wastes, etc., is regarded as a cost-effective technique for the treatment of high volume and low concentration complex wastewaters containing zinc metal. Very few reviews are available where readers can get an overview of the sorption capacities of agro based biomasses used for zinc remediation together with the traditional remediation methods. The purpose of this review article is to provide the scattered available information on various aspects of utilization of the agro based biomasses for zinc metal ions removal. An extensive table summarizes the sorption capacities of various adsorbents. These biosorbents can be modified using various methods for better efficiency and multiple reuses to enhance their applicability at industrial scale. We have incorporated most of the valuable available literature on zinc removal from waste water using agro based biomasses in this review.

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“…Previous research has aimed at straw as a means for reducing erosion in sloped soils affected by forest fires [18][19][20], or as a sorbent to fight heavy metals pollution [21][22][23]. In addition, Rao et al [24] found that straw mulching could reduce the loss of heavy metals in runoff.…”

Section: Introductionmentioning

confidence: 99%

Wheat Straw as a Bio-Sorbent for Arsenate, Chromate, Fluoride, and Nickel

Romar-Gasalla

Coelho

Nóvoa-Muñoz

et al. 2017

Water

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Abstract:Batch-type experiments were used to study As(V), Cr(VI), F − , and Ni 2+ sorption/desorption on wheat straw. For the lowest concentration added (0.5 mmol·L −1 ), the sorption sequence was F − > Ni 2+ > Cr(VI) >> As(V) (93%, 61%, 29%, 0.3%), but changed to Ni 2+ > F − > Cr(VI) >> As(V) when 3.0 and 6.0 mmol·L −1 were added (with 65%, 54%, 25%, 0%, and 68%, 52%, 27%, 0% sorption, respectively). Overall, As(V) showed the lowest sorption, whereas it was 25-37% for Cr(VI), 61-68% for Ni 2+ , and 52-93% for F − . For As(V), pH in the equilibrium solution was always above the pH of the point of zero charge (pH PZC ) for wheat straw, decreasing sorption efficiency. For Cr(VI), pH was below pH PZC , but not enough to reach high sorption. For F − , pH in the equilibrium was above pH PZC , which could reduce sorption. For Ni 2+ , pH in the equilibrium was always below pH PZC , which made sorption difficult. The satisfactory fitting of Cr(VI), F − , and Ni 2+ data to the Freundlich model suggests multilayer-type adsorption. Desorption was high for F − , whereas Ni 2+ showed the lowest desorption. This research could be especially relevant when focusing on the use of wheat straw as a bio-sorbent, and in cases where straw mulching is used.

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Removal of Zn+2 and Ni+2 by adsorption in a fixed bed of wheat straw

Cited by 70 publications

References 36 publications

Chemical treatment of teff straw by sodium hydroxide, phosphoric acid and zinc chloride: adsorptive removal of chromium

Chemical treatment of teff straw by sodium hydroxide, phosphoric acid and zinc chloride: adsorptive removal of chromium

Application of Agro‐Based Biomasses for Zinc Removal from Wastewater – A Review

Wheat Straw as a Bio-Sorbent for Arsenate, Chromate, Fluoride, and Nickel

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