Humic Acid가 PCB의 착화합과 활성탄 흡착특성에 미치는 영향

김성현; 백일현

Journal of the Korean Industrial and Engineering Chemistry, Vol.4, No.4, 746-752, December, 1993

Export Citation

Humic Acid가 PCB의 착화합과 활성탄 흡착특성에 미치는 영향

Effects of Dissolved Humic Acid on Complexation and Activate Carbon Adsorption of PCB

김성현, 백일현

초록

PCB와 HA 사이의 착화합 정도에 대한 양적인 측정을 위해 투석막을 이용한 평형실험이 여러 가지 변수에 대해 먼저 수행되었다. 활성탕에 대한 PCB의 흡착특성 파악을 위해서 HA가 용해된 물과 용해되지 않은 물을 이용하여 PCB에 대한 흡착평형 및 속도실험을 행하였다. 실험결과 HA에 대한 PCB의 착화합 정도는 PH, Ca²⁺농도, 이온세기 및 HA의 농도에 큰 영향을 받는 것을 확인하였다. PCB의 활성탄에 대한 흡착능력은 HA가물에 존재할 때 크게 감소하였으며 흡착특성은 HA, PCB와 HA에 착화합된 PCB 등의 물질이 서로 경쟁적으로 활성탄에 흡착하게 되는 복잡한 특성을 보일 것으로 판단되었다.

Quantitative measurements have been made by using equilibrium dialysis techniques on the extent of complexation between PCB and dissoved humic acid(HA). This research investigates the effectiveness of activated carbon adsorption for the removal of PCB from organic free water and humid acid background solution by using benchscale equilibrium and rate tests. It was found that the extent of complexation depended on the pH, calcium concentration, ionic strength, and the concentration of humic acid. When HA was present, activated carbon capacity was greatly reduced due to complexation and competitive adsorption effects and the adsorption characteristics became complicated by the presence of various species such as the unassociated HA, PCB, and PCB-HA complexes.

[References]

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[1] Hassett JP, Anderson MA, Environ. Sci. Technol., 13, 1526 (1979)

[2] Wershaw RL, Burcar PJ, Goldberg MC, Environ. Sci. Technol., 3, 271 (1969)

[3] Porrier MA, Bordelon BR, Laseter JL, Environ. Sci. Technol., 6, 1033 (1972)

[4] McCarthy JF, Jimenez BD, Environ. Sci. Technol., 19, 1072 (1985)

[5] Summers RS, Ph.D. Dissertation, Stanford University, Palo Alto, CA (1986)

[6] Pirbazari M, Ph.D. Dissertation, University of Michigan, Ann Arbor, Mich (1980)

[7] Lee MC, Snoeyink VL, Crittenden JC, J. Am. Water Works Assoc., 73, 440 (1981)

[8] Ghosh K, Schnitzer M, Soil Sci., 129, 266 (1980)

[9] Thurman EM, Malcolm RL, Environ. Sci. Technol., 15, 463 (1981)

[10] McCreary JJ, Snoeyink VL, Water Res., 14, 152 (1980)

[11] Randtke SJ, Jepsen CP, J. Am. Water Warks Assoc., 74, 84 (1982)

[12] O'Connor DJ, Connally JP, Water Res., 14, 1517 (1980)

[13] Crittenden JC, Weber WJ, J. Environ. Eng.-ASCE, 104, 185 (1978)

[14] Crittenden JC, Weber WJ, J. Environ. Eng.-ASCE, 104, 433 (1978)