Adsorption of cu(II) by activated carbons and effects on the adsorptive performance from the pH changes
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2020-08-07 11:42
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CIBOTARU, Silvia, TIMBALIUC, Nina, LUPASCU, Tudor. Adsorption of cu(II) by activated carbons and effects on the adsorptive performance from the pH changes. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 164. ISBN 978-9975-62-428-2.
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Achievements and perspectives of modern chemistry 2019
Conferința "International Conference "Achievements and perspectives of modern chemistry""
Chişinău, Moldova, 9-11 octombrie 2019

Adsorption of cu(II) by activated carbons and effects on the adsorptive performance from the pH changes


Pag. 164-164

Cibotaru Silvia, Timbaliuc Nina, Lupascu Tudor
 
Institute of Chemistry
 
 
Disponibil în IBN: 7 noiembrie 2019


Rezumat

Heavy metal containing wastes are considered to be hazardous to both human life and the environment due to their acute toxicity and non-biodegradability, even when the heavy metals are present at trace concentrations. A common method for heavy metal removal from water is ion exchange. One of the efficient methods of removing heavy metals is the adsorption by activated carbons. Adsorption is very effective process for a variety of applications, and now it is considered an economical and efficient method for metal ions removal from wastewaters. The most generally solid adsorbent is activated carbon, which is a very efficient solid adsorbent in many different applications. The adsorption ability of activated carbon was investigated for removal of Cu (II) from single aqueous systems. Results of the initial screening allowed to select the adsorbents for kinetic and isotherm studies as well as investigating the effects on adsorptive performance from pH changes.The adsorption processes were carried out at room temperature (20±2°C) at the initial metal concentration of 100 mg/L. The process was studied for individual metals of Cu (II) and the concentrations of solutions varied in the limits of 10-120 mg/L. The varied pH solutions were prepared adding dilute NaOH or HNO3 dropwise to achieve pH values from 1.3 to 6.2. Bottles were shaken at room temperature for 16 h. Then samples were filtered. The metal equilibrium concentrations were determinated by Atomic Absorption Spectrometer.