Environmentally Friendly Inorganic Magnetic Sulfide Nanoparticles for Efficient Adsorption‐Based Mercury Remediation from Aqueous Solution

Patel, Khushbu; Singh, Nimisha; Nayak, Jyotsna M.; Jha, B. L.; Sahoo, Suban K.; Kumar, Rajender

doi:10.1002/slct.201702851

Cited by 10 publications

(2 citation statements)

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“…Remarkably, carboxymethyl cellulose (CMC)-stabilized FeS offered an Hg 2+ sorption capacity of 3449 mg g −1 , and this was attributed to the dual-mode sorption mechanism where CMC-FeS adsorbs Hg 2+ through concurrent precipitation [86]. Similarly, a large Pb 2+ remediation capacity of 2950 mg g −1 has been demonstrated by Pala & Brock [128] with zinc sulfide (ZnS) gel, where the mechanism is mainly more of ion exchange than adsorption. ZnS has been successfully used to sequentially remove Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ from simulated contaminated water containing 5-678 mg l −1 of heavy metal ions at removal efficiencies of 99.9%, 99.9%, 90.8% and 66.3%, respectively [77].…”

Section: Metal Sulfide Nanoparticlesmentioning

confidence: 98%

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Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

et al. 2021

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Contamination of water and soil with toxic heavy metals is a major threat to human health. Although extensive work has been performed on reporting heavy metal pollutions globally, there are limited review articles on addressing this pernicious phenomenon. This paper reviews inorganic nanoparticles and provides a framework for their qualities required as good nanoadsorbents for efficient removal of heavy metals from water. Different inorganic nanoparticles including metals, metal oxides and metal sulfides nanoparticles have been applied as nanoadsorbents to successfully treat water with high contaminations of heavy metals at concentrations greater than 100 mg l −1 , achieving high adsorption capacities up to 3449 mg g −1 . It has been identified that the synthesis method, selectivity, stability, regeneration and reusability, and adsorbent separation from solution are critical parameters in deciding on the quality of inorganic nanoadsorbents. Surface functionalized nanoadsorbents were found to possess high selectivity and capacity for heavy metals removal from water even at a very low adsorbent dosage of less than 2 g l −1 , which makes them better than conventional adsorbents in environmental remediation.

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Section: Metal Sulfide Nanoparticlesmentioning

confidence: 98%

“…Open Sci. 8: 201485[128]. Metal sulfides remove divalent metal ions through (i) chemical precipitation (equation (2.1)), (ii) ion exchange (equation (2.2)), and (iii) complexation (equation (2.3))[86].…”

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Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

et al. 2021

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Modelling and Optimization of As(III) Adsorption onto Thiol‐Functionalized Bentonite from Aqueous Solutions Using Response Surface Methodology Approach

2018

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The aim of the present work was to investigate thiol‐functionalized bentonite (TFB) as a novel adsorbent for the adsorption of As(III) from aqueous environments and to determine optimal adsorption conditions. The response surface methodology (RSM) was applied to analyze the most significant variables for adsorption including initial pH, temperature (°C, T), initial As(III) concentration (mgL−1, Co), adsorbent dosage (g, m) and contact time (min., t). The optimum adsorption conditions according to the RSM were found to be 5.98, 42.87 °C, 31.02 mgL−1, 0.33 g and 127.48 min for initial pH, T, Co, m and t, respectively. Under these conditions obtained by the model, the maximum percentage of As(III) adsorption and adsorption capacity were found to be 91.01% and 8.56 mgg−1, respectively. The kinetic studies showed that As(III) adsorption followed a pseudo‐second‐order kinetic model and the rate was controlled by both intraparticle and film diffusion. Experimental data were compared with linear isotherm models and it was found that the adsorption data has better fit to the Langmuir isotherm model. Furthermore, the thermodynamic studies showed that the adsorption of As(III) was endothermic, possible and natural. Based on all these conclusions, it can be said that TFB has high potential for As(III) removal from aqueous environments.

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Management of Environmental Waste and Pollutants: Current Trend and Research Directions

Gupta

Achary

2020

Handbook of Environmental Materials Management

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Environmentally Friendly Inorganic Magnetic Sulfide Nanoparticles for Efficient Adsorption‐Based Mercury Remediation from Aqueous Solution

Cited by 10 publications

References 56 publications

Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

Modelling and Optimization of As(III) Adsorption onto Thiol‐Functionalized Bentonite from Aqueous Solutions Using Response Surface Methodology Approach

Management of Environmental Waste and Pollutants: Current Trend and Research Directions

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