Heavy metal ions removal from waste water bythe natural zeolites

Obaid, Shamsan S.; Gaikwad, D.K.; Sayyed, M.I.; Al-Rashdi, K.S.; Pawar, Pravina P.

doi:10.1016/j.matpr.2018.06.122

Cited by 43 publications

(22 citation statements)

References 15 publications

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“…[18], Zamzow M.J., et al. [19] were studied the removal of heavy metals and other cations from wastewater using zeolites.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of heavy metal ions (Cu2+, Ni2+, Co2+ and Fe2+) from aqueous solutions by natural zeolite

Belova

2019

Heliyon

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The process of remove copper, nickel, cobalt and iron ions by natural zeolite of the Yagodninsky deposits, Kamchatka region, from water resources within a concentration range of 0.5–3.5 mg-eq/L has been experimentally investigated. The specified concentrations range was chosen according the contents of heavy metals in the waste water of the mining enterprise of Kamchatka region The values of maximum sorption capacity have been determined. On the basis of studies using X-ray powder diffraction (XRD) it has been established by the Rietveld method of calculation that the zeolite tuff of the Yagodninsky deposit consists of clinoptilolite-Na (23.0 %), clinoptilolite-Ca (52.1 %) and modernite (12.9 %). It has been established that exchange cations are sodium, calcium, potassium and magnesium. The Gibbs free energy has been calculated which is equal for copper ΔG = –25.6 kJ/mol, iron – ΔG = –23.7 kJ/mol, nickel – ΔG = –21.5 kJ/mol and cobalt – ΔG = –20.0 kJ/mol. The obtained results show that natural zeolite can be used as an effective sorbent for extracting of ions Cu 2+ , Ni 2+ , Co 2+ and Fe 2+ from polluted waters. On the basis of the analysis of the parameters of the mordenite crystal lattice a decrease in sizes in the direction of the a - and b -axes and, consequently, of the elementary cell volume of the treated zeolite is observed as compared with the initial zeolite in the Cu > Ni > Co > Fe row. New knowledge about the sorption properties of the Yagodninsky deposit zeolites can be interesting for the industrial areas of South-Eastern Asia such as China, Japan, Korea, etc.

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“…[18], Zamzow M.J., et al. [19] were studied the removal of heavy metals and other cations from wastewater using zeolites.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of heavy metal ions (Cu2+, Ni2+, Co2+ and Fe2+) from aqueous solutions by natural zeolite

Belova

2019

Heliyon

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“…Therefore, effective methods for the removal of pollutants from gas and liquid phases are crucial for both the ecosystem and human beings. [ 2,10‐14 ]…”

Section: Introductionmentioning

confidence: 99%

An overview of low‐temperature plasma surface modification of carbon materials for removal of pollutants from liquid and gas phases

Huang

et al. 2020

Plasma Processes & Polymers

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As a promising surface treatment technique, low‐temperature plasma (LTP) technology has been widely used over the past two decades. Herein, the surface modification of carbon materials using LTP treatment is reviewed to clarify the modification effects. First, the basic details of LTP treatment are summarized. Second, the surface morphology, pore structure, surface chemistry, adsorption performance, and catalytic characteristics of LTP‐treated carbon materials are reviewed. Finally, the research required to further develop LTP technology for the surface modification of carbon materials is discussed. This review will contribute toward advancing the application of LTP‐treated carbon materials in environmental pollution control.

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“…Even though there are several studies performed to examine the possible application of various sorbents to remove naturally-occurring heavy metals and radioactive materials, mostly, these studies were performed for decontamination of polluted waters rather than rare earth production [53,54]. Also, the studies pertaining to rare earth extraction from coal-based feedstock material while proposing an environmentally benign process are considerably limited.…”

Section: Of 21mentioning

confidence: 99%

“…In this study, adsorption of thorium and uranium from rare earthcontaining aqueous solution was studied while coarse coal refuse was used as the feedstock. In this presented study, zeolites, a group of crystalline aluminosilicates, were chosen for the adsorption studies due to their unique physicochemical characteristics, such as high porosity and high sorption capacity [37,54]. The effects of various operational parameters, such as initial feed solution pH, adsorbent particle size, adsorbent amount, and contact time of solid and liquid phases on the removal of thorium and uranium were investigated during adsorption.…”

Section: Of 21mentioning

confidence: 99%

Separation of Radionuclides from a Rare Earth-Containing Solution by Zeolite Adsorption

Talan

Huang

2020

Minerals

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The increasing industrial demand for rare earths requires new or alternative sources to be found. Within this context, there have been studies validating the technical feasibility of coal and coal byproducts as alternative sources for rare earth elements. Nonetheless, radioactive materials, such as thorium and uranium, are frequently seen in the rare earths’ mineralization, and causes environmental and health concerns. Consequently, there exists an urgent need to remove these radionuclides in order to produce high purity rare earths to diversify the supply chain, as well as maintain an environmentally-favorable extraction process for the surroundings. In this study, an experimental design was generated to examine the effect of zeolite particle size, feed solution pH, zeolite amount, and contact time of solid and aqueous phases on the removal of thorium and uranium from the solution. The best separation performance was achieved using 2.50 g of 12-µm zeolite sample at a pH value of 3 with a contact time of 2 h. Under these conditions, the adsorption recovery of rare earths, thorium, and uranium into the solid phase was found to be 20.43 wt%, 99.20 wt%, and 89.60 wt%, respectively. The Freundlich adsorption isotherm was determined to be the best-fit model, and the adsorption mechanism of rare earths and thorium was identified as multilayer physisorption. Further, the separation efficiency was assessed using the response surface methodology based on the development of a statistically significant model.

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Heavy metal ions removal from waste water bythe natural zeolites

Cited by 43 publications

References 15 publications

Adsorption of heavy metal ions (Cu2+, Ni2+, Co2+ and Fe2+) from aqueous solutions by natural zeolite

Adsorption of heavy metal ions (Cu2+, Ni2+, Co2+ and Fe2+) from aqueous solutions by natural zeolite

An overview of low‐temperature plasma surface modification of carbon materials for removal of pollutants from liquid and gas phases

Separation of Radionuclides from a Rare Earth-Containing Solution by Zeolite Adsorption

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