Evaluation of chelating ion-exchange resins for separating Cr(III) from industrial effluents

Cavaco, Sofia A.; Fernandes, Sandra; Augusto, C.M.; Quina, Margarida J.; Gando-Ferreira, Licínio M.

doi:10.1016/j.jhazmat.2009.03.129

Cited by 57 publications

(24 citation statements)

References 22 publications

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“…In the paper by Cavaco et al (2009) it was found that for the range 0.15-0.30 mm, 50 % of the particles have diameters less than 0.223 mm. As follows from the obtained results, the bead size of the used chelating ion exchangers has also approximately the Gaussian distribution ( Fig.…”

Section: Complexing Agentsmentioning

confidence: 98%

“…Kabay et al (1998b) found that the acid concentration strongly determines the resin behaviour with respect to the sorption/elution of Cd(II) and Cr(III). In the paper by Cavaco et al it was pointed but that Diphonix Resin® has strong affinity for Cr(III) ions and high selectivity towards Fe(III) and Ni(II) (Cavaco et al 2009). The mechanism of sorption on Diphonix Resin® can be written as (Hajiev et al 1989):…”

Section: Chelating Ion Exchangers With the Phosphonic And Aminophosphmentioning

confidence: 99%

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Selective Removal of Heavy Metal Ions from Waters and Waste Waters Using Ion Exchange Methods

Hubicki¹,

Kołodyńska²

2012

Ion Exchange Technologies

105

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Ion Exchange Technologies 194gastrointestinal tract less than 10% cadmium is absorbed. An important source of human exposure to cadmium is food and water. In natural water its typical concentration lies below 0.001 mg/dm 3 , whereas, the upper limit recommended by EPA (Environmental Protection Agency) is less than 0.003 mg/dm 3 . The maximum limit in drinking water is 0.003 mg/dm 3 .Cadmium accumulates in kidneys, pancreas, intestines and glands altering the metabolism of the elements necessary for the body, such as zinc, copper, iron, magnesium, calcium and selenium. Damage to the respiratory tract and kidneys are the main adverse effects in humans exposed to cadmium compounds. In humans exposed to fumes and dusts chronic toxicity of cadmium compounds is usually found after a few years. The main symptom of emphysema is that it often develops without preceding bronchitis. The second basic symptom of chronic metal poisoning is kidney damage. It includes the loss and impairment of smell, pathological changes in the skeletal system (osteoporosis with spontaneous fractures and bone fractures), pain in the extremities and the spine, difficulty in walking, the formation of hypochromic anemia. The most known 'Itai-Itai' disease caused by cadmium exposure is mixed osteomalacia and osteoporosis. However, an important source of cadmium in soils are phosphate fertilizers. Large amounts of cadmium are also introduced to soil together with municipal waste. The high mobility of cadmium in all types of soils is the reason for its rapid integration into the food chain. Daily intake of cadmium from food in most countries of the world is 10-20 mg.Lead is a toxic metal, which accumulates in the vital organs of men and animals and enters into the body through air, water and food. According to the WHO (World Health Organization) standards, its maximum limit in drinking water is 0.05 mg/dm 3 but the maximum discharge limit for lead in wastewater is 0.5 mg/dm 3 . Its cumulative poisoning effects are serious haematological damage, anaemia, kidney malfunctioning, brain damage etc. Chronic exposure to lead causes severe lesions in kidney, liver, lungs and spleen.Lead is used as industrial raw material in the manufacture of storage batteries, pigments, leaded glass, fuels, photographic materials, matches and explosives. Lead being one of very important pollutants comes from wastewaters from refinery, wastewaters from production of basic compounds containing lead, wastewaters with the remains of after production solvents and paints. Large toxicity of lead requires that its contents are reduced to the minimum (ppb level). To this end there are applied chelating ions with the functional phosphonic and aminophosphonic groups. Also weakly basic anion exchangers in the free base form can be used for selective removal of lead(II) chloride complexes from the solutions of pH in the range 4-6. Also a combined process of cation exchange and precipitation is often applied for lead(II) removal form wastewaters (Pramanik et al. 2009). The average colle...

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Section: Complexing Agentsmentioning

confidence: 98%

Section: Chelating Ion Exchangers With the Phosphonic And Aminophosphmentioning

confidence: 99%

Selective Removal of Heavy Metal Ions from Waters and Waste Waters Using Ion Exchange Methods

Hubicki¹,

Kołodyńska²

2012

Ion Exchange Technologies

105

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“…These techniques are firmly established, well understood and represent significant capital investments by industry. Several research reports demonstrated the potential of ion-exchange (Cavaco et al, 2007(Cavaco et al, , 2009Jha et al, 2008;Al Abdulgader et al, 2013), membrane (Cassano et al, 2007;Das et al, 2007;Feini et al, 2008;Carrera et al, 2009) and activated carbon (Suzuki et al, 1996;Mohan et al, 2008) techniques for the decontamination of metal-bearing industrial effluents.…”

Section: Current Status Of Metal Remediation Technologiesmentioning

confidence: 99%

Is biosorption suitable for decontamination of metal-bearing wastewaters? A critical review on the state-of-the-art of biosorption processes and future directions

Vijayaraghavan

Balasubramanian

2015

Journal of Environmental Management

232

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“…However, the high catalyst activity of Pd/HP20 leads to poor chemoselectivity in hydrogenation, because almost all reducible functionalities are hydrogenated in the same manner as with Pd/C. DIAION CR11 (CR11, Mitsubishi Chemical Corporation) is a chelate resin bearing iminodiacetate moieties on the benzene rings of the polystyrene-divinylbenzene polymer backbone as a chelating functionality [69][70][71][72] (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Recent Development of Palladium-Supported Catalysts for Chemoselective Hydrogenation

2017

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This paper describes practical and selective hydrogenation methodologies using heterogeneous palladium catalysts. Chemoselectivity develops dependent on the catalyst activity based on the characteristic of the supports, derived from structural components, functional groups, and/or morphologies. We especially focus on our recent development of heterogeneous palladium catalysts supported on chelate resin, ceramic, and spherically shaped activated carbon. In addition, the application of flow technology for chemoselective hydrogenation using the palladium catalysts immobilized on molecular sieves 3A and boron nitride is outlined.

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Evaluation of chelating ion-exchange resins for separating Cr(III) from industrial effluents

Cited by 57 publications

References 22 publications

Selective Removal of Heavy Metal Ions from Waters and Waste Waters Using Ion Exchange Methods

Selective Removal of Heavy Metal Ions from Waters and Waste Waters Using Ion Exchange Methods

Is biosorption suitable for decontamination of metal-bearing wastewaters? A critical review on the state-of-the-art of biosorption processes and future directions

Recent Development of Palladium-Supported Catalysts for Chemoselective Hydrogenation

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