Aqueous Hg(II) immobilization by chitosan stabilized magnetic iron sulfide nanoparticles

Sun, Mingyang; Cheng, Guanghuan; Ge, Xinlei; Chen, Mindong; Wang, Cheng; Lou, Liping; Xu, Xinhua

doi:10.1016/j.scitotenv.2017.10.119

Cited by 81 publications

(14 citation statements)

References 47 publications

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“…The mechanism of Hg 2? removal by iron sulfide nanoparticles is generally described by three processes, namely adsorption, ion exchange, and precipitation [24][25][26][27]. The latter two result in iron leaching into the solution.…”

Section: Mercury Removal From Watermentioning

confidence: 99%

Carbon microspheres decorated with iron sulfide nanoparticles for mercury(II) removal from water

et al. 2019

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A new and simple method is developed to synthesize carbon microspheres decorated with iron sulfide nanoparticles for mercury ion removal from water. The synthesis is based on carbonizing polystyrene–divinylbenzene-based and iron(III) sulfate-loaded cation exchange resins between 500 and 1000 °C. The phase composition, surface area, and morphology of these materials are characterized by various spectroscopic and diffraction techniques, including Mössbauer spectroscopy, powder X-ray diffraction, Raman and scanning electron microscopy, and BET analysis. Pyrrhotite is found to be the dominant iron-containing phase. The adsorption performance of microspheres for mercury ion removal from water is studied as a function of adsorbent load and contact time at pH 6.5 using a solution of 40 mg dm−3 mercury ion. Pyrrhotite nanoparticles played a key role in mercury ion removal amounting to 70–90% of the extracted amount. A high adsorption capacity of 104 mg of mercury/g of adsorbent at an adsorbent load of 0.33 g dm−3 is achieved, and the removal kinetics could be well fitted with a pseudo-second-order kinetic model, indicating chemical sorption. The synthetic method is easy to scale up for large-scale production and materials are easy to handle, which is significant for large-scale environmental applications.

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Section: Mercury Removal From Watermentioning

confidence: 99%

Carbon microspheres decorated with iron sulfide nanoparticles for mercury(II) removal from water

et al. 2019

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“…The NPs in common have a major drawback of getting aggregated in wastewater, so it is strengthened using some reinforcements. Chitosan is one of the major stabilising agent utilised along with the metal NPs to defeat the aggregation issue [8]. Chitosan polymer is found to be a promising agent for expanding the durability of the magnetic NPs in the aqueous solution.…”

Section: Chitosan Magnetic Npsmentioning

confidence: 99%

“…As a result of the various unique features of magnetic NPs, it is widely used now in various industrial applications and researches [15]. Sun et al [8] have depicted the methodology to synthesise the chitosan‐stabilised Ferrous sulphide (FeS) NP and also it is characterised using various analyses such as Fourier‐transform infrared spectroscopy, X‐ray photoelectron spectroscopy (XPS), and X‐ray diffraction. In this work, it is inferred that the size of the synthesised NP was found to be 20 nm, whereas the external surface area was 21.3 m 2 /g.…”

Section: Chitosan Magnetic Npsmentioning

confidence: 99%

Insights of CMNPs in water pollution control

Joshiba¹,

Kumar²,

Carolin³

et al. 2019

IET nanobiotechnol.

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The various toxic contaminants such as dyes, heavy metals, pesticides, rare-earth elements, and hazardous chemicals are the major threats to all the flora and fauna. Owing to the harmful ill effects caused by the toxic contaminants, it is necessary to eliminate these compounds from the authors' ecosystem. The chitosan magnetic nanomaterials (CMNPs) are one of the superior materials used in the wastewater treatment through various conventional technologies. The chitosan is a natural source obtained from the crustacean shells of crabs, prawns etc. The magnetic nanomaterial prepared by the reinforcement of chitosan is highly effective in the removal of heavy metals, dyes, organic matter, and harmful chemicals. It is used in various technologies such as adsorption, flocculation, immobilisation, photocatalytic technology, and bioremediation. This possesses unique surface and magnetic characteristics, Moreover, it is simple, economically feasible, and eco-friendly material used efficiently in wastewater treatment. This review paper depicts the overview of CMNP in the industrial effluent treatment.

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“…PVC). Hg(II) is a soft Lewis acid, which preferentially bonds with soft Lewis bases, and therefore sulfur-containing chemicals, such as, thiourea, CCS, and dithizone, have been found effective in Hg adsorption from water matrices, since the thiol functional group is a soft base (Sun et al, 2018). Specifically, PAR, thiourea and dithizone are wellknown ligands for mercury adsorption (Elly, 1973;Eshwar and Nagarkar, 1972;Litman et al, 1977;Zuo and Muhammed, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, EDXRF was used to quantitatively assess the membranes' Hg(II) preconcentration selectivity. Even though there are many works dealing with aqueous Hg(II) preconcentration approaches (Kallithrakas-Kontos and Foteinis, 2016;Pokhrel et al, 2017;Sun et al, 2018), a comprehensive chemical speciation study that could shed light on the nature of the chemical binding that it is formed between the aqueous Hg(II) ions and specific ligands immobilized on solid-state membranes is missing from the literature.…”

Section: Introductionmentioning

confidence: 99%

Solid-state polymer membranes for simple, sensitive, and low-cost monitoring of mercury in water

Foteinis

Vazgiouraki

Karydas

et al. 2019

Science of The Total Environment

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Solid-state Hg(II) selective membranes were produced and assessed by means of X-ray absorption near edge structure in the total reflection X-ray fluorescence (XANES-TXRF) setup and by the energy dispersive X-ray fluorescence (EDXRF) technique. Membranes were functionalized using four promising ligands for mercury complexation, i.e.: i) 4-(2-Pyridylazo) resorcinol (PAR), ii) thiourea, iii) calconcarboxylic acid (CCS), and iv) dithizone. A simple analytical procedure was followed, using miniscule reagent quantities, thus suggesting the process is also cost-effective. XANES-TXRF revealed that mercury complexes with the ligands, and not simply adsorbed onto the PVC matrix, while the complexation was not affected by the matrix existence. Mercury exhibited an increased oxidation grade and was covalently bound to it was preferably bound with Cu in tap water, indicating limited usefulness for mercury preconcentration. Therefore, it is suggested that, depending on the ligand, the solid-state membranes could also possibly used for multi-elemental heavy metals analysis in water.

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Aqueous Hg(II) immobilization by chitosan stabilized magnetic iron sulfide nanoparticles

Cited by 81 publications

References 47 publications

Carbon microspheres decorated with iron sulfide nanoparticles for mercury(II) removal from water

Carbon microspheres decorated with iron sulfide nanoparticles for mercury(II) removal from water

Insights of CMNPs in water pollution control

Solid-state polymer membranes for simple, sensitive, and low-cost monitoring of mercury in water

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