A novel acrylamide-free flocculant and its application for sludge dewatering
| Autor: | Lianghua Lu, Wenqing Peng, Zhida Pan, Nan Hao |
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| Rok vydání: | 2014 |
| Předmět: |
Anions
Flocculation Environmental Engineering Intrinsic viscosity Acrylic Resins Emulsion polymerization Waste Disposal Fluid Polymerization chemistry.chemical_compound Cations Copolymer Organic chemistry Methyl acrylate Waste Management and Disposal Water Science and Technology Civil and Structural Engineering Sewage Ecological Modeling Cationic polymerization Pollution Monomer Acrylates chemistry Chemical engineering Acrylamide |
| Zdroj: | Water Research. 57:304-312 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2014.03.047 |
| Popis: | In the present research, copolymers of methyl acrylate (MA) with anionic or cationic monomers were synthesized via emulsion polymerization, and used as sludge dewatering aids in wastewater treatment. The copolymerization of different stoichiometry of two monomers afforded a variety of water soluble copolymers with charge densities ranging from 40% to 80%, which align with the charge density of current flocculant products. These copolymers resemble current commercial products, but provide a greener solution by eliminating acrylamide monomer, which is a suspected carcinogen. High molecular weight copolymers were achieved by applying powder-like synthesis process with intrinsic viscosity of final products as high as 12.98 dl/g for anionic flocculant and 10.74 dl/g for cationic flocculant. The copolymers of methyl acrylate and [2-(Acryloyloxy)ethyl]trimethylammonium chloride (AETAC) with 55% charge density exhibited comparable performance in clay settling test, real water jar test, and sludge dewatering, when compared to AM-based commercial product in the real wastewater treatment application. |
| Databáze: | OpenAIRE |
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