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| Preparation of a Quaternary Ammonium Polyamine Flocculant Using for Papermaking Wastewater Treatment |
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| DOI：10.11980/j.issn.0254-508X.2011.08.007 |
| Key Words:quaternary ammonium polyamine flocculants CODCr removal percentage cationic degree papermaking wastewater |
| Fund Project:本课题为省部共建国家重点实验室开放课题（K-092006）。 |
| Author Name | Affiliation | | 郑堰日1,2 | 1.福州大学环境与资源学院,福建福州,350108；2.福建省生物质资源化技术开发基地,福建福州,350108 | | 刘以凡1,2 | 1.福州大学环境与资源学院,福建福州,350108；2.福建省生物质资源化技术开发基地,福建福州,350108 | | 刘明华1,2 | 1.福州大学环境与资源学院,福建福州,350108；2.福建省生物质资源化技术开发基地,福建福州,350108 |
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| Abstract:Quaternary ammonium polyamine flocculants, denoted as PEDU, were prepared by polycondensation of urea, dimethylamine, ammonia and epichlorohydrin. The infrared spectrum analysis confirmed that PEDU contained quaternary ammonium group and hydroxyl group. The influences of molar ratios of urea and epichlorohydrin, dimethylamine and epichlorohydrin, ammonia and epichlorohydrin, reaction temperature and reaction time on the cationic degree of the polyamine flocculants and the CODCr removal percentage of papermaking wastewater were optimized by the orthogonal and single-factor experiments. The optimum conditions included 0.08∶1.28∶0.30∶1 of the mole ration of urea, dimethylamine, ammonia and epichlorohydrin, 70℃ of the reaction temperature and 5 h of the reaction time. The cationic degree could reach 5.49 mmol/g when the PEDU was prepared at the optimum conditions. The results showed that the removal percentage of CODCr of papermaking wastewater could reach 67.9% when the flocculant dosage was 50 mg/L, pH value was 7.0 at room temperature. |
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