Naslov
Neutralization/purification of the wastewaters from the printed circuit boards production using waste by-products

Autori
Oreščanin, Višnja ; Kollar, Robert ; Halkijević, Ivan ; Kuspilić, Marin ; Flegar, Vanja

Izvornik
Journal of environmental science and health. Part A (1093-4529) 49 (2013), 5; 540-544

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
printed circuit boards wastewaters; waste base; iron rich sludge; ozonization; copper; iron

Sažetak
The purpose of this work was development of new method for the neutralization/purification of the printed circuit boards wastewater (PCBW) using two industrial by-products. PCBW was characterized with low pH value (2.11) and high concentration of TDS (50190 mg/L), copper (4190 mg/L) and iron (2660 mg/L). Waste base (WB), by-product of the alumina production and waste sludge, by-product of the electrochemical treatment of groundwater were employed as neutralization/adsorption agents. WB due to its high neutralization capacity was used for pH adjustment to pH 8 and heavy metals removal from both effluents while the final removal of the contaminants down to the regulated values was assessed by the adsorption/coagulation with the iron and aluminum rich waste sludge. Following the combined treatment the removal efficiency of iron and copper was higher than 99.99% with their final concentration in the treated water of 0.151 mg/L and 0.129 mg/L, respectively. Following the ozone base oxidation the removal efficiency of the organic contaminants was more than 83%. The successful application of the industrial waste by- products for the neutralization/purification of the PCBW with the removal efficiencies of the contaminants comparable or better than those obtained with conventional treatment represented the main advantage of our presented method.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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