Adsorption behaviour of metal ions on hydroximate resins

Ahuja, Mamta; Rai, A.K.; Mathur, P.

doi:10.1016/0039-9140(96)01984-4

Cited by 20 publications

(9 citation statements)

References 10 publications

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“…Also, Fe adsorption is not affected by low concentrations of CaCl 2 and MgCl 2 , but at higher concentrations a small decrease in adsorption was observed and this may be attributed to the affinity of the reactive polymers towards alkaline earth metals as transition metal ions. 5 So, the results suggest that the adsorption capacity of the adsorbent is slightly affected by the presence of such inorganic salts.…”

Section: Water Treatmentmentioning

confidence: 95%

“…Various methods, such as ionexchange, reverse osmosis, and electrodialysis techniques, have been developed for the removal and recovery of heavy metal ions from sewage and industrial wastewater. [5][6][7][8][9][10] Traditional chemical precipitation can be envisaged, but the generation of precipitated bulky hydroxides and colloidal particles is a major disadvantage.…”

Section: Introductionmentioning

confidence: 99%

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Treatment of polluted water resources using reactive polymeric hydrogel

Shawky

Elsayed

Ali

et al. 2006

J of Applied Polymer Sci

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An experimental work was conducted to study the performance of the already prepared polyvinyl pyrrolidone/acrylic acid (PVP/AAc) copolymer hydrogel to chelate heavy metals from bulk solution. Studies of the binding capacity, adsorption isotherm, and adsorption kinetic experiments showed that PVP/AAc copolymer hydrogel has high binding capacities and good adsorption kinetic properties for the metal ions under investigation. The adsorption isotherms of such metal ions on the copolymer exhibit a Langmuir-type equation. The chelated copolymers were characterized by FTIR and XRD. Technical feasibility for the uses of the prepared PVP/AAc hydrogel for the treatment of polluted samples; collected from different water resources in Helwan area (Egypt) was investigated. The evaluation of the system was performed by a complete analysis of water samples before and after the treatment process. The results showed a promising possibility for producing water of better quality in the area under investigation, using such prepared hydrogel.

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Section: Water Treatmentmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Treatment of polluted water resources using reactive polymeric hydrogel

Shawky

Elsayed

Ali

et al. 2006

J of Applied Polymer Sci

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“…For this, 10 mL of metal salt solution containing 2000 mg of each metal SAMAL ET AL. Ahuja and coworkers (30) have observed that Cu 2+ can be separated from Cu 2+ -Co 2+ and Cu 2+ -Ni 2+ mixtures at pH 5.5. Evaluation of Freundlich adsorption isotherm parameters of the resins.…”

Section: Separationmentioning

confidence: 98%

A comparative study on metal ion uptake behavior of chelating resins derived from the formaldehyde-condensed phenolic Schiff bases of 4,4′-diaminodiphenylsulfone and hydroxybenzaldehydes

Samal

Das

Acharya

et al. 2002

Polymer-Plastics Technology and Engineering

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Three reactive and functional polymers were synthesized by reacting formaldehyde with the phenolic Schiff bases derived from 4,4 0diaminodiphenylsulfone and o-, m-, and p-hydroxybenzaldehydes, respectively. The metal ion uptake behavior of these resins towards Cu 2+ , Ni 2+ , Co 2+ , and UO 2þ 2 ions in dilute aqueous media was studied. The optimum conditions for the absorption of metal ions were determined by varying the various parameters like contact time, size of the sorbents, concentration of the metal ion solutions, and the 229

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“…Umas das propostas de Ahuja e colaboradores [40] para a síntese de resinas com grupos hidroximato parte da modificação de resinas Chelex-100. De acordo com os autores, a introdução de grupos hidroximato nessas resinas aumentaria a seletividade para os metais tóxicos em detrimento dos metais alcalinos e alcalino-terrosos.…”

Section: Principais Rotas De Sintese Desenvolvidas Para Produção De Runclassified

Principais rotas de síntese de resinas complexantes de mercúrio

2007

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Resumo: A recuperação de espécies contendo mercúrio utilizando resinas complexantes obtidas a partir da modificação de suportes poliméricos vem atraindo cada vez mais a atenção dos pesquisadores. São muitas as combinações de suportes e grupos complexantes para a síntese desses materiais. Assim, este trabalho apresenta uma revisão sobre os principais grupos funcionais avaliados, bem como as rotas de síntese adotadas para a imobilização desses grupos nos suportes. É abordada também a problemática da síntese de uma resina eficiente, produzida a partir de um processo limpo e acessível às indústrias que utilizam mercúrio em seus processos. Palavras-chave:Resinas complexantes, mercúrio, copolímeros de estireno e divinilbenzeno, rotas de síntese. Chelating Resins for Recovery of Mercury: The Main Routes of SynthesisAbstract: The recovery of mercury and its compounds by using chelating resins produced by modification of polymer supports has been studied by many researchers. There are many combinations of supports and functional groups for producing chelating resins that are appropriate for mercury complexation. This paper presents an overview of the main functional groups applied for mercury complexation and the routes used for immobilization of these groups in polymer supports. Also discussed are the problems involved in the synthesis of an efficient chelating resin, produced through a non-polluting route, which are appropriate for companies employing mercury in their processes.Keywords: Chelating resins, mercury, styrene-divinylbenzene copolymers, synthesis routes. IntroduçãoOs primeiros registros de utilização do mercúrio e do minério cinabre (HgS) datam de mais de 2300 anos, em cerimô-nias religiosas como ungüento medicinal e em processos de amalgamação. Por mais de mil anos os alquimistas utilizaram o mercúrio como a base para a transmutação e empregavam amálgamas para produzir imitações de ouro e prata. Já em 1643 o mercúrio foi introduzido em pesquisas científicas com a invenção do barômetro por Torricelli. Fahrenheit, em 1720, inventou o termômetro de mercúrio. Joseph Pristley foi o primeiro a utilizar esse metal como selante de gases solú-veis em água em análise de gases. Em 1799, Howad preparou o mercúrio fulminante que passou a ser usado como detonador para explosivos e teve uma importante participação nas histórias de paz e guerras no mundo [1,2] . Ao longo dos anos, as características do mercúrio, em suas formas químicas particulares, permitiram a sua utilização em diversos processos industriais. Até 1970 já eram conhecidos mais de seiscentos usos de mercúrio nas indústrias, tais como a produção de materiais elétricos e eletrônicos, que se deve à baixa resistência elétrica e alta condutividade térmica desse metal. A capacidade de formação de amálga-mas com a maioria dos metais permite a sua aplicação em processos extrativos, na metalurgia e na odontologia. Já a sua elevada estereoespecificidade, quando da formação de compostos inorgânicos, possibilita o seu uso em catálise e na indústria de polímeros sintét...

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Adsorption behaviour of metal ions on hydroximate resins

Cited by 20 publications

References 10 publications

Treatment of polluted water resources using reactive polymeric hydrogel

Treatment of polluted water resources using reactive polymeric hydrogel

A comparative study on metal ion uptake behavior of chelating resins derived from the formaldehyde-condensed phenolic Schiff bases of 4,4′-diaminodiphenylsulfone and hydroxybenzaldehydes

Principais rotas de síntese de resinas complexantes de mercúrio

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