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Effects of Sulphate, Nitrate and Humic Substances on Oxidation of Mn(II) with Atmospheric Oxygen
Manganese is one of the most significant pollutants in surface and ground water. Manganese can be found as dissolved, colloidal or undissolved solid compounds in natural water. Manganese concentration is needed to consider for domestic and industrial areas. Manganese in domestic waters causes sediments and head loss rate, aesthetic problems such as colour and deleterious taste. In industrial area, manganese may cause colour failure in paper, textile, food industries and economic losses due to sediments in plumbings. The acceptable values for manganese must be less than 0,05mg/L in drinking water and 0,1 mg/L in industries. Today mainly method which is applied for manganese removal is oxidation of manganese with atmospheric oxidation. In domestic and industrial uses, problems of manganese involve utilization of effective manganese removal methods.
Aim of this study is to investigate the effects of SO42-, NO3- as inorganic substances and humic substances as organic substances.
In this study which is performed in four stages, oxidation of Mn(II) is investigated at 3 mg/L and 5 mg/L initial concentrations, at 9,0 and 9,5 pH values, filter papers having 0,2µm and 0,45µm pore diameters were used and real Mn(II) values were determined. Secondly, at 3 mg/L initial concentration, 9,5 pH and using 0,2µm filter paper, effects of SO42- on the oxidation of Mn(II) were studied. At the third stage, effects of NO3- were investigated. At the fourth stage, effects of humic substances were examined.
According to the results, oxidation decelerates at the presence of SO42- and NO3- and humic substances accelerates the oxidation first, then decelerates the oxidation rate.
Key Words: Mn(II), oxidation, humic substances, SO42-, NO3-
GÖKÇE Elif
Danışman : Yrd. Doç. Dr. İlda VERGİLİ
Anabilim Dalı : Çevre Mühendisliği
Mezuniyet Yılı : 2008
Tez Savunma Jürisi : Yrd. Doç Dr. İlda VERGİLİ
Prof. Dr. Semiha ARAYICI
Doç. Dr. Nilgün BALKAYA
Yrd. Doç. Dr. Ender ÇETİN
Yrd. Doç Dr. Selva ÇAVUŞ
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