Abstract：Through isothermal adsorption test, the competitive adsorption relationship between trichloromethane（CHCl3）, bromodichloromethane（CHBrCl2） and Dichloroacetic acid（Cl2CHCOOH） on activated carbon was explored. The effects of the adsorption of CHCl3 by activated carbon under different concentrations of CHBrCl2 and Cl2CHCOOH were also investigated. The experimental results show that the adsorption of CHCl3 and CHBrCl2 by activated carbon conforms to the Freundlich model, and the adsorption of Cl2CHCOOH conforms to the Langmuir model. The adsorption of three disinfection by-products by activated carbon was preferential and the capacity of adsorbing CHBrCl2, CHCl3 and Cl2CHCOOH was ranged from large to small. Adsorption of disinfection by-products by activated carbon at low concentration will decrease with the increase of substances in the system. The concentration of Cl2CHCOOH has little effect on the adsorption of CHCl3 at low concentration. The adsorption of CHCl3 decreases with the increase of the concentration of CHBrCl2 in the water.
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2020, Vol. 47 
