LUOLiming,DINGLuming,ZHOUZhiwei.Adsorption Characteristics and Mechanism of Algal Organic Matter Using Granular Activated Carbon[J].China Water & Wastewater,2026,42(9):47-53.
Adsorption Characteristics and Mechanism of Algal Organic Matter Using Granular Activated Carbon
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第9期
Page:
47-53
Column:
Date of publication:
2026-05-01
- Keywords:
- granular activated carbon; adsorption characteristics; algal organic matter; advanced water treatment
- Abstract:
- Seasonal algal blooms in reservoir water sources lead to the release of algal organic matter (AOM), posing significant challenges to conventional drinking water treatment processes. This study investigated the characteristics of three granular activated carbons (GACs) for AOM adsorption, elucidated the underlying adsorption mechanisms, and evaluated the applicability of GAC for removing composite pollutants consisting of AOM and Savannah River natural organic matter (SRNOM). The results showed that the three GACs derived from peach shell, coconut shell, and apricot shell were all dominated by micropores smaller than 1 nm. Among them, coconut shell GAC possessed the highest micropore content, whereas apricot shell GAC exhibited the largest proportion of mesopores and macropores. Apricot shell GAC demonstrated the best adsorption performance for AOM, achieving maximum removal efficiencies of 59.76% for UV254 and 26.71% for DOC. Weakly acidic conditions with pH of 6-7 and water temperature of 35 ℃ were found to be more favorable for AOM removal. GAC showed higher adsorption efficiency for humic?like substances and organic fractions within the molecular weight range of 30-100 ku, while the removal of protein-like substances and organic fractions smaller than 10 ku was relatively limited. The adsorption process involved pore-filling effects and chemical interactions associated with C—N bonds. Apricot shell GAC exhibited the highest adsorption efficiency for AOM-SRNOM composite pollutants, achieving removal efficiencies of 71.62% for UV254 and 38.84% for DOC.
Last Update:
2026-05-01