The aim of the study is to examine natural organic matter (NOM) adsorption in drinking water using commercial powder activated carbon (AC). The source water sample was collected from the inlets of drinking water treatment plants (DWTPs) located in Isparta. Lake Egirdir water samples had a low Specific Ultra Violet Absorbance (SUVA) value (1.04 L/DOC.m). Commercial powder AC (Norit SX F Cat) with a surface area of 656.6 m2/g, a density of 200–300 kg/m3, and pHpzc 7.8 was used. The kinetic tests were performed with a fixed adsorbent dose of 50 mg/L and various contact times (15 min, 30 min and 1, 2, 4, 8, 10, 24, 48, 72, 96 hours). Isotherm experiments were conducted using different adsorbent dosages (1, 2.5, 5, 10, 25, 50, 75, 100, and 200 mg/L). UV measurements and dissolved organic carbon (DOC) analyses were used to determine reduction of NOM. The DOC was measured using the TOC-L CPH (Shimadzu) analyzer using the high temperature combustion method. UV absorbance values at 254 nm were measured using a UV-visible spectrophotometer. According to isotherm experiments, at 1 mg/L of adsorbent, 12% DOC and 18% UV254 removal were achieved. The results showed that 80% of UV254 and 60.4% of dissolved organic carbon (DOC) could be removed after treating with powder AC at 200 mg/L and 24 hour contact time. The high removal efficiencies observed suggested that commercial powder AC would be a potential adsorbent for the removal of NOM from waters in low SUVA values. (This study was obtained from the first-ranked author's thesis)
Anahtar Kelimeler: Activated Carbon, Adsorption, Dissolved Organic Matter, Drinking Water, Natural Organic Matter
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