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Separation of AsVfrom aqueous solutions using chelating polymers containing FeIII-loaded phosphorus groups

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Negrea A., Ciopec M., Negrea P., Lupa L., Popa A., Davidescu C. M., Ilia G.
Open Chemistry
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2015
|
vol. 13
|
issue 1
EN
AsV ions were removed by batch equilibrium with FeIII-loaded chelating polymers containing aminophosphinic or aminophosphonic groups. It was effectively removed AsV from a synthetic wastewater as well as from a real drinking water containing 40 μg As per liter. Sorption is best described by pseudo-second order kinetics and a Langmuir isotherm.
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Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

100%
Voda R., Negrea A., Lupa L., Ciopec M., Negrea P., Davidescu C. M., Butnariu M.
Open Chemistry
|
2015
|
vol. 13
|
issue 1
EN
Dye pollution in waste waters causes serious environmental and health risk, legislation problems and is a serious challenge to environmental scientists. In this work the treatment of waste waters resulted from ink jet cartridges manufacturing, using different nanocrystalline ferrites MIIFe2O4 (MII = Mg, Cu) as adsorbent materials, has been investigated. The ferrites were obtained by thermal decomposition at 500°C of the magnesium and copper ferrioxalate coordination compounds. The nanocrystalline ferrites powder was investigated by various methods such as XRD, IR, SEM and EDX. The discoloration of the waste waters has been spectrophotometrically studied. The ferrites could be removed easily after adsorption by using a magnetic filtration process. The results indicated that the maximum adsorption efficiency was obtained after 60 min of treatment, magnesium ferrite showing a higher efficiency than the copper ferrite in the treatment process of waters resulted from ink jet cartridges manufacturing.
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