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Updated: Jul 11, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
[Adsorption performance of haloacetic acids onto 5 GACs from water]
Kun-ping Wang1, Rong Qi, Yu Zhang
1Key Lab. of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Abstract:
Adsorption performance of 5 GACs were compared on two abundant haloacetic acids (HAAs) as disinfection by-products (dichloroacetic acid and trichloroacetic acid). The adsorption behaviours of the two HAAs were well correlated with Langmuir equation. When the two HAAs co-existed, trichloroacetic acid tended to be adsorbed more easily. The adsorption capacity of a foreign GAC-A for dichloroacetic acid was 4.4-5.7 times that of domestic GACs, and 3.8 times that of another foreign GAC-B, while the adsorption capacity of a foreign GAC-A for trichloroacetic acid was 4.0-5.4 times that of domestic GACs, and 2.6 times that of another foreign GAC-B. The equilibrium study of competitive adsorption between dichloroacetic acid and trichloroacetic acid on GAC-A demonstrates that the relative adsorption capacity of HAAs has a linear increase with their relative equilibrium concentration. The adsorption capacity for trichloroacetic acid is sensitive to changes at its equilibrium concentration greater than that for dichloroacetic acid.
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