A novel chelating resin containing high levels of sulfamine group: Preparation and its adsorption characteristics towards p-toluenesulfonic acid and Hg(II)

Qi, Yong‐Xin; Jin, Xinliang; Cui, Yu; Wang, Yan; Yang, Liuqing; Li, Yanfeng

doi:10.1016/j.cej.2013.08.016

Cited by 33 publications

(6 citation statements)

References 36 publications

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“…The adsorption capacity of SiO 2 /Al 2 O 3 -G2.0 for Hg(II) ion is greater than the most of other mentioned adsorbents Table S3. ,,− Adsorbents featuring sulfur and different nitrogen reactive sites with their organic structure have demonstrated a bigger Hg(II) uptake volume. ,,− According to Pearson’s theory, sulfur and amine groups (−S–H, −N–H and −CN) are classified as soft Lewis bases, which may explain the high removal capacity and likewise high selectivity for Hg(II), which is a soft Lewis acid. − The proposed adsorbent in this work clearly indicates the strong tendency based on soft acid/soft reactions, as the result of the higher numbers of the soft base hubs on the surface of a nanobiodendrimer.…”

Section: Resultsmentioning

confidence: 99%

A Biocompatible Nanodendrimer for Efficient Adsorption and Reduction of Hg(II)

Arshadi

Eskandarloo

Abdolmaleki

et al. 2018

ACS Sustainable Chem. Eng.

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Mercury is a neurotoxic metal at very low concentrations and can lead to severe human health problems. In this work, we synthesized a novel heterogeneous dendrimer for the elimination and reduction of Hg(II) from H2O using SiO2–Al2O3 nanoparticles individually grafted with l-cysteine methyl ester (LCME), triazine, and diethylenetriamine. Applying Freundlich, Langmuir, and Sips isotherm equilibrium along with the pseudo-first-order (PFO), and pseudo-second-order (PSO) kinetic models, we studied how the nanobiodendrimer’s Hg(II) adsorption was affected by various parameters, like initial amount of Hg(II), adsorbent dosage, reaction time, solution temperature, interfering ions, and initial pH. Our results concluded that only 10 min of reaction time was needed to attain equilibrium (2639 mg g–1). The uptake kinetics also indicated the mechanism of adsorption is according to a PSO model, proving that the rate-confining stage of the Hg(II) ion uptake is chemical adsorption. Thermodynamic parameters (ΔG, ΔS, and ΔH) concluded from the van’t Hoff model demonstrated that the uptake of the toxic metal was exothermic, spontaneous, and feasible in nature. The nanodendrimer containing LCME demonstrated high reusability, with high adsorption capacity after eight adsorption–desorption periods. We also showed how the nanobiodendrimer could adsorb mercury ions from a real source of water (Cayuga Lake), even after three cycles of use. Finally, we explored the chemical removal mechanism of Hg(II) by the LCME using several techniques, including infrared spectroscopy, energy dispersive X-ray spectroscopy (EDX), zeta potential, diffuse reflectance ultraviolet–visible (DRUV–vis), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS), demonstrating that Hg(II) were converted to metallic Hg(0) after adsorption on the nanobiodendrimer.

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Section: Resultsmentioning

confidence: 99%

A Biocompatible Nanodendrimer for Efficient Adsorption and Reduction of Hg(II)

Arshadi

Eskandarloo

Abdolmaleki

et al. 2018

ACS Sustainable Chem. Eng.

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“…In view of the economical aspects and environmental benign; adsorption is more suitable process for water treatment comparing with the mentioned techniques [11,12]. Numerous adsorbents such as carbon based materials, silica gel, chelating resins, and fibers, have been applied in mercury adsorption process [13][14][15][16][17][18]. In spite of worthiness of the most mentioned adsorbents in literature some of them show weaknesses like low capacity and high equilibrium time causes low desire to choose them for water treatment hence it is quite necessary to develop novel adsorption based plane for water treatment [19].…”

Section: Introductionmentioning

confidence: 99%

Water decontamination in terms of Hg(II) over thiol immobilized magnesium ferrite: Gum Arabic biosorbent—response surface optimization, kinetic, isotherm and comparing study

et al. 2022

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Mercury thrown even at a low concentrations in water resources causes a severe threat to ecosystem hence the presented work describes a low cost and environmentally friendly clean up platform for decontamination of water in terms of mercury ions. For this purpose MgFe2O4 -Gum Arabic composite was prepared with a simple ultrasound assisted precipitation route and further modified with L-cysteine as a thiol resource to improve its adsorption characteristic. The structure of biosorbent was characterized with XRD, FESEM, VSM, EDX, and BET techniques. Effective parameters on mercury adsorption were optimized with response surface methodology (RSM) using Box-Behnken design (BBD). Maximum removal efficiency was obtained at pH of 5, contact time of 15 min and adsorbent dosage of 19 mg by magnetic GA. After thiol functionalization optimum variables changed to pH of 2, time of 15 min and dosage of 5 mg. Isotherm study indicated that mercury biosorption onto the magnetic Gum Arabic and thiol immobilized sorbent followed Langmuir and Freundlich model with adsorption capacity of 96 and 250 mg g -1 , respectively. Results for kinetic study revealed that mercury adsorption followed pseudosecond order model. To study the ability of biosorbent as a reusable compound a mixture of HCl (0.5 mol L -1 ) and thiourea (2%) was employed to release the adsorbed ions from the sorbent surface moreover, it showed 90% removal efficiency after three cycles of sorption and desorption which confirmed the presented composite is a reusable biosorbent.

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“…[13] As an electron acceptor,H g II receives electrons from functional groups of adsorbent to form coordination bonds. [15] Pb II is also an electron acceptorw ith an empty orbitala nd it can interactw ith the electrond onor species. [15] Pb II is also an electron acceptorw ith an empty orbitala nd it can interactw ith the electrond onor species.…”

Section: Introductionmentioning

confidence: 99%

“…[14] Therefore, functional groups such as sulfur,t hiosemicarbazide, amine, sulfamine, and so on can be used as ac helating mediumt oe nhancet he adsorption capacity.T he amine group may be able to form new structuress uch as imino with Hg II , which can be ar eason for the high, effective, and selective adsorptiono fa mine groups relative to Hg II . [15] Pb II is also an electron acceptorw ith an empty orbitala nd it can interactw ith the electrond onor species. Thus, an effective adsorption of Pb II by this type of materials is expected.…”

Section: Introductionmentioning

confidence: 99%

Fast and Selective Heavy Metal Removal by a Novel Metal‐Organic Framework Designed with In‐Situ Ligand Building Block Fabrication Bearing Free Nitrogen

Rouhani

Morsali

2018

Chemistry A European J

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Fast and effective adsorbents for the selective removal of Hg and Pb ions were prepared by the reaction of Zn(NO ) ⋅6H O, H BDC, and N ,N -bis(pyridin-4-ylmethylene) ethane-1,2-diamine (L) that yields an unprecedented two-dimensional layer-based supramolecular framework, {Zn(BDC)(L*)}⋅DMF (TMU-40), by solvothermal reaction. The formation of this framework involved an in situ C=C coupling of L to L* [L*=5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine]. As L* contains free nitrogen atoms, direct reaction of L* and metals led to metallated products. Post-synthetic modification of this novel MOF (TMU-40) with H O gives a new framework (O-TMU-40) by same structure and different ligand, which also bears free nitrogen atoms. FTIR spectra, TGA analysis, X-ray diffraction, Zeta Potential analysis and H NMR spectroscopy were used to characterize the prepared frameworks. The TMU-40 and O-TMU-40 frameworks were used for heavy-metal removal from aqueous solutions. Maximum adsorption values of 269 mg g for Hg with TMU-40 and 215 mg g for Pb with O-TMU-40 were achieved in 10 min at 298 Kwithout changes in the pH of the adsorption medium with pseudo-second order kinetics based on the Langmuir model. The extremely fast kinetics of TMU-40 means this adsorbent can reduce heavily contaminated water containing Hg concentrations of 40 ppm down to the acceptable limit of 2 ppb.

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A novel chelating resin containing high levels of sulfamine group: Preparation and its adsorption characteristics towards p-toluenesulfonic acid and Hg(II)

Cited by 33 publications

References 36 publications

A Biocompatible Nanodendrimer for Efficient Adsorption and Reduction of Hg(II)

A Biocompatible Nanodendrimer for Efficient Adsorption and Reduction of Hg(II)

Water decontamination in terms of Hg(II) over thiol immobilized magnesium ferrite: Gum Arabic biosorbent—response surface optimization, kinetic, isotherm and comparing study

Fast and Selective Heavy Metal Removal by a Novel Metal‐Organic Framework Designed with In‐Situ Ligand Building Block Fabrication Bearing Free Nitrogen

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