Removal of hexavalent chromium using sphagnum moss peat

Sharma, Divyanshi; Forster, C.F.

doi:10.1016/0043-1354(93)90012-7

Cited by 329 publications

(170 citation statements)

References 9 publications

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“…This value, compared to 51 and 71 mg/g for GAC and PAC, respectively, indicated that larger mass of PC is required for the removal of the AEF from OSPW. The adsorption capacity also decreased with the increase in PC concentration, suggesting that some of the available sites remained unsaturated (Khan et al 2011;Sharma and Forster 1993). The values of the separation factor (R L ) in the range of 0-1 suggested the favorable adsorption of AEF from OSPW.…”

Section: Adsorption Isothermsmentioning

confidence: 89%

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

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Petroleum coke (PC) is a waste by-product generated during the oil upgrading processes by the petroleum industry. The continuing accumulation of large quantities of PC requires the development of innovative strategies for the effective utilization of this carbon-rich material. In this study, PC was used for the removal of naphthenic acids (NAs) and acid-extractable fraction (AEF) from oil sands process-affected water (OSPW), generated during the oil refining process. A systematic study on the adsorption of organic fractions, vanadium leaching from PC, adsorption mechanisms, and the effect of physico-chemical characteristics of the PC on adsorption process was performed. Physico-chemical properties of PC were determined by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy, and Brunauer-Emmett-Teller surface area analysis. AEF and NAs removals of 60 and 75 %, respectively, were achieved at PC dose of 200 g/L after 16 h of contact. FT-IR and TGA analysis of PC suggested the physisorption of organic compounds onto the surface of PC. The calculated mean free energy of adsorption (E \ 8 kJ/mol) also indicated the physisorption of organics to the PC surface. The hydrophobic interactions between the NAs and the PC were suggested as the dominant adsorption mechanisms. The vanadium release occurred when PC was mixed with OSPW and vanadium concentration increased with an increase in the PC dose. Speciation analysis indicated that the vanadium leached was predominantly vanadium (V) and insignificant amount of vanadium (IV) was also detected.

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Section: Adsorption Isothermsmentioning

confidence: 89%

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

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“…The microbial reduction of Cr(VI) to Cr(III) by fungi, yeast and bacteria has been one of the most studied mechanisms for the bioremediation of this metal (Lovley 1995;Wang and Shen 1995;Lonergan et al 1996). In this way, the strategy for Cr(VI) bioremediation is to reduce it to Cr(III) not only to decrease the Cr(VI) toxicity but also to immobilise the insoluble form of Cr(III) as Cr(OH) 3 in soil at pH values of 6-9 (Sharma and Forster 1993;Tokunaga et al 1999;Pellerin and Booker 2000).…”

Section: Metallophilic Fungi Applications For Cr(vi) Removalmentioning

confidence: 99%

Metallophilic fungi research: an alternative for its use in the bioremediation of hexavalent chromium

García-Hernández

Villarreal-Chiu

Garza-González

2017

Int. J. Environ. Sci. Technol.

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Contamination by hexavalent chromium has had a large impact on modern society and human health. This problem is a consequence of its great industrial applicability to several products and processes. Short-term exposure to hexavalent chromium can cause irritation, ulceration in skin and stomach and in addition to cancer, dermatitis, and damage to liver, renal circulation and nervous tissues, with even death being observed in response to long-term exposures. Many techniques have been used for the remediation of this pollutant, including physical and chemical approaches and, in more recent years, biological methods. Filamentous fungi isolated from contaminated sites exhibit a significant tolerance to heavy metal; hence, they are an important source of microbiota capable of eliminating hexavalent chromium from the environment. However, these microorganisms can do so in different ways, including biosorption, bioreduction, and bioaccumulation, among others. In this review, we explore several of the most documented mechanisms that have been described for fungi/hexavalent chromium interactions and their potential use in bioremediation.

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“…In the sorption step, a 1:3 molar ratio of PVBNMDG:PClVBTA was contacted with 10 mL of As(V) solution 10 mg L -1 in a shaker at 30 ºC under a stirring rate of 140 rpm for 24 hours. After the sorption step, the resin was contacted with 4 M HCl, HNO 3 and HClO 4 in a shaker for 4 hours at 30 ºC to evaluate the elution performance. Figure 2 shows the infrared spectra of the synthetic resins.…”

Section: Sorption Studiesmentioning

confidence: 99%

“…Two forms of arsenic are common in natural waters: arsenite (AsO 3 3-) and arsenate (AsO 4 3-), referred to as arsenic (III) and arsenic (V), respectively 17,20,21 .…”

Section: Introductionmentioning

confidence: 99%

“…A number of these studies have developed sorption processes including adsorption and ion-exchange mechanisms, precipitation, solvent extraction, conjunction of membranes and polymers using simple materials such as activated carbon or more sophisticated materials such as especially tailored polymers as well as biosorbents, such as fungal or bacterial biomass, and materials of biological origin, including alginate and chitosan [2][3][4][5][6][7][8][9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

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Arsenic Sorption Using Mixtures of Ion Exchange Resins Containing N-Methyl-D-Glucamine and Quaternary Ammonium Groups

Özkula

Urbano

Rivas

et al. 2016

J. Chil. Chem. Soc.

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The method of synthesis and the arsenic removal properties of ion-exchange resins based on N-methyl-D-glucamine and trimethylammonium groups are presented. The N-methyl-D-glucamine based monomer was synthesized by the reaction of 4-vinyl benzyl chloride with N-methyl-D-glucamine, along with the use of N,N-methylene-bis-acrylamide as a crosslinker reagent for polymerization. In addition, poly(4-vinylbenzyl)trimethylammonium was synthesized. Arsenate sorption studies were conducted and the pH effect, kinetics, sorption capacity, and elution performance were studied. The experimental data were fitted to kinetic models, such as the pseudo-first order and pseudo-second order models. The pseudo-second order model exhibited the best correlation with the experimental data. The Langmuir and Freundlich isotherms were fitted to the experimental data, and the Freundlich isotherm exhibited the best fit.

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Removal of hexavalent chromium using sphagnum moss peat

Cited by 329 publications

References 9 publications

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Metallophilic fungi research: an alternative for its use in the bioremediation of hexavalent chromium

Arsenic Sorption Using Mixtures of Ion Exchange Resins Containing N-Methyl-D-Glucamine and Quaternary Ammonium Groups

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