Selective and effective adsorption of Hg(II) from aqueous solution over wide pH range by thiol functionalized magnetic carbon nanotubes

Fan, Lu; Zhou, Anlan; Zhong, Linrui; Zhang, Zheng; Liu, Yong

doi:10.1016/j.chemosphere.2019.03.154

Cited by 71 publications

(13 citation statements)

References 56 publications

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“…Furthermore, the surface charge of the adsorbent would be positive below the pHPZC or be negative above the pHPZC. While solution pH exceeds pHPZC, the negative surface charge on adsorbent increase with the increase of solution pH and therefore shows better heavy metal removal efficiency at higher pH [76] . These observations suggest that ion exchange mechanisms underpin the adsorption of Cd 2+ and Pb 2+ on RB and RS [55] .…”

Section: Effects Of Ph On Sorptionmentioning

confidence: 99%

Remediation of cadmium and lead polluted soil using thiol-modified biochar

Fan

Cai

Chi

et al. 2020

Journal of Hazardous Materials

237

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Thiol-modified rice straw biochar (RS) was prepared by an esterification reaction with βmercaptoethanol and used for the remediation of Cd and Pb polluted soils. Modified biochar was characterized through elemental analysis, BET analysis, FE-SEM, FT-IR and XPS. These analyticalcharacterizations confirmed that the thiol groups were successfully grafted onto the surface of the biochar and were involved in the metal ion complexation. The batch sorption experiments showed that Cd 2+ and Pb 2+ sorption onto RS followed a pseudo second order kinetic model and a Langmuir isotherm. The maximum adsorption capacities for Cd 2+ and Pb 2+ were 45.1 and 61.4 mg g -1 , respectively in the single-metal systems. In contrast, Cd 2+ was selectively adsorbed over Pb 2+ by RS in the binary-metal systems. Both Cd 2+ and Pb 2+ were mainly removed through surface complexation. The soil incubation experiments further showed that RS reduced the available Cd concentrations up to 40% while available Pb concentrations was reduced up to 11%. Overall, this study demonstrates thiol-modified biochar can effectively enhance the remediation of heavy metal polluted soils.

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Section: Effects Of Ph On Sorptionmentioning

confidence: 99%

Remediation of cadmium and lead polluted soil using thiol-modified biochar

Fan

Cai

Chi

et al. 2020

Journal of Hazardous Materials

237

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“…Fig. 3 represents the XRD patterns of MWCNTs, HEDP‐MWCNTs and ATMP‐MWCNTs, the diffraction peaks observed for all these three samples at 2 θ = 26.0° are corresponded to carbon structure [37], and there is no new diffraction peak appeared after the facile preparation reaction processes. This indicates that the crystal structure of MWCNTs has not been affected by the addition of organophosphonic acid functional groups, and there are not any essential structure changes occurred after the chemical modification reaction of MWCNTs with HEDP/ATMP.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorptive selectivity is also an indispensable factor for evaluating the properties of an adsorbent, by which the adsorbent can be used to adsorb some specific metal ions or to separate some specific metal ions from mixed metal ions solutions [37]. In this study, the adsorption selectivity of HEDP‐MWCNTs/ATMP‐MWCNTs to the target ion Pb(II)/Au(III) has been evaluated by the competitive adsorption with mercury ions/copper ions/nickel ions/cobalt ions/chromium ions/cadmium ions as the co‐ions.…”

Section: Resultsmentioning

confidence: 99%

Facile preparation of multiphosphonic acid functionalised multi‐walled carbon nanotubes for enhanced adsorption properties for heavy metal ions from wastewaters

Jia

Yin

Yang

et al. 2020

Micro & Nano Letters

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“…A novel adsorbent thiol functionalized magnetic carbon nanotubes (CNTs-SH@Fe 3 O 4 ) was synthesized and used to adsorb Hg(II) from water [22]. Batch experiments showed that this adsorbent had a high Hg(II) adsorption efficiency (>98%) over wide pH range (3)(4)(5)(6)(7)(8)(9)(10)(11), being Hg(II) adsorption exothermic and selective in the presence of Cu(II), Mg(II), or Zn(II) in the solution.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

López

2020

Metals

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Mercury is a toxic metal, thus, it is an element which has more and more restrictions in its uses, but despite the above, the removal of this metal, from whatever the form in which it is encountered (zero valent metal, inorganic, or organic compounds), and from different sources, is of a widespread interest. In the case of Hg(II), or Hg2+, the investigations about the treatment of Hg(II)-bearing liquid effluents (real or in most cases synthetic solutions) appear not to end, and from the various separation technologies, adsorption is the most popular among researchers. In this topic, and in the 2019 year, more than 100 publications had been devoted to this field: Hg(II)-removal-adsorption. This work examined all of them.

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Selective and effective adsorption of Hg(II) from aqueous solution over wide pH range by thiol functionalized magnetic carbon nanotubes

Cited by 71 publications

References 56 publications

Remediation of cadmium and lead polluted soil using thiol-modified biochar

Remediation of cadmium and lead polluted soil using thiol-modified biochar

Facile preparation of multiphosphonic acid functionalised multi‐walled carbon nanotubes for enhanced adsorption properties for heavy metal ions from wastewaters

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

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