engleski

Removal of humic acid from water by adsorption onto modified activated carbon

Humic acid impair water quality due to their chemical reactivity with many substances and their presence in water is undesirable. In addition, during the drinking water treatment process, a humic acids reacts with chlorine based disinfects producing harmful disinfection by-products (DBPs) with organic substances [1, 2]. The aim of this study was to examine the effectiveness of humic acid adsorption on two commercially available chemically modified activated carbon, Hydraffin 30N (mH) and Cullar D (mC). The efficiency of humic acid removal was investigated depending on the initial concentration of humic acid, pH, adsorption time, adsorbent mass and temperature. Obtained results shown that up to 58.44% humic acid can be absorbed by modified Hydraffin 30 N (45 °C, pH of 7.5, adsorbent mass 0.1 g, initial humic acid concentration 5 mg dm-3 and adsorption time of 120 min) while modified Cullar D adsorbed up to 66.46 % of humic acid (25 °C, pH of 7.5, adsorbent mass 0.1 g, initial mass concentration of humic acid 5 mg dm-3 and adsorption time 120 min). The effectiveness of dissolved humic acid removal from water decreased by moving from the optimal conditions.

drinking water treatment ; humic acid removal ; adsorption ; activated carbon

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