강화된 응집이 활성탄 흡착에 미치는 영향

초록

It is a well known fact that enhanced coagulation can effectively eliminate natural organic matter knownas precursor of disinfection by-products. In the study, effect of the enhanced coagulation was investigatedby isotherm, kinetic and molecular weight distribution on activated carbon adsorption. The stronglyadsorbable fraction was not preferably removed by enhanced coagulation. This conclusion could be drawnby that K value and initial concentration did not show much difference. Therefore, the effect of theenhanced coagulation on isotherm was to reduce the initial concentration over the each adsorbable frac-tion. When the enhanced coagulation was adapted for pretreatment for activated carbon adsorption theoperation period could be extended to 3 to 4 times. The dominant molecular weight (MW) fraction was lessthan 1,000 for all samples. In conventional coagulation MW bigger than 10,000 was effectively removed. Inthe enhanced coagulation MW smaller than 1,000 was preferably removed. It was observed that thestrongly adsorbable fraction had very strong relationship with the MW less than 3,000.

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