CAJ | 학술논문

通过实验及数值模拟的方法,研究了不同温度和 pH 值条件下有机碳的溶解动力学特性.结果表明,提高溶液温度有利于加速易溶解有机碳的溶解速率,但不能提高固相有机碳总的溶解量.降低溶液 pH 值有利于固相有机碳的溶解.实验样品在所有测试环境条件下,有机碳溶解速率为0.05~0.22m3/(kg·h)；易溶解有机碳占总可溶解性有机碳百分比为30%~50%；易溶解有机碳溶解速率为14~65h-1,比难溶解有机碳溶解速率高出大约3个数量级.水溶性有机碳生物可降解性实验表明,79%以上水溶性碳难以在厌氧条件下被原生菌降解.
통과실험급수치모의적방법,연구료불동온도화 pH 치조건하유궤탄적용해동역학특성.결과표명,제고용액온도유리우가속역용해유궤탄적용해속솔,단불능제고고상유궤탄총적용해량.강저용액 pH 치유리우고상유궤탄적용해.실험양품재소유측시배경조건하,유궤탄용해속솔위0.05~0.22m3/(kg·h)；역용해유궤탄점총가용해성유궤탄백분비위30%~50%；역용해유궤탄용해속솔위14~65h-1,비난용해유궤탄용해속솔고출대약3개수량급.수용성유궤탄생물가강해성실험표명,79%이상수용성탄난이재염양조건하피원생균강해.
The organic carbon dissolution behavior under different temperatures and pH value conditions was investigated by means of both experiments and numerical simulation. Increasing leaching temperature was beneficial for accelerating the dissolution rate of rapidly dissolving organic carbon fraction. However, the dissolution amount of organic carbon was not improved under high temperature conditions. On the other hand, lower leaching pH values were favorable for dissolving organic carbon from solid phase. Under different leaching conditions, the dissolution rates of organic carbon were in the order of 0.05~0.22m3/(kg·h), while rapidly dissolving fraction of organic carbon accounted for 30%~50% of the total and its dissolution rates ranged from 14h-1to 65h-1 (orders of magnitude were three times higher than that of slowly dissolving fraction of organic carbon). Moreover, the incubation experiment results indicated that more than 79% of the water extractable organic carbon was hard to be decomposed by in-situ bacteria under anaerobic condition.