Reduction of Natural Organic Matter and Disinfection By-Product Precursors by Coagulation and Adsorption
| Autor: | Chung Huei Liang, Su Huei Chao, E. E. Chang, Pen-Chi Chiang |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Total organic carbon
chemistry.chemical_classification Environmental Engineering Alum General Chemical Engineering Disinfection by-product Geotechnical Engineering and Engineering Geology chemistry.chemical_compound Membrane Adsorption chemistry Environmental chemistry Water treatment Organic matter Water pollution Water Science and Technology |
| Zdroj: | Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management. 8:57-64 |
| ISSN: | 1944-8376 1090-025X |
| DOI: | 10.1061/(asce)1090-025x(2004)8:1(57) |
| Popis: | Source water from King-Men Reservoir water in Taiwan was treated by alum and polyaluminum chloride coagulation, and the corresponding natural organic matter was fractionated by ultrafiltration membranes for determining its molecular weight (MW) distribution to provide the baseline information for further investigation. Due to the characteristics of the source-water nature, a lower alum dosage could reduce the total organic carbon (TOC) concentration by a great amount (25%), while the difference in TOC removal efficiency was found to be insignificant at a higher dosage (60–90 mg/L) and even operating in a lower pH range. The results show that the larger MW coagulant polyaluminum chloride, having higher-charge neutralization and bridging capacities, exhibits better performance than the lower MW alum. In addition, the granular-activated carbon-adsorption process provides a relatively lower THMFP in the treated water at the same level of trihalomethanes and to lower the coagulant doses demand as well. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|