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| Preparation of Modified Starch Flocculant and Its Application in Paper Mill Wastewater Treatment |
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| DOI：10.11981/j.issn.1000-6842.2015.02.34 |
| Key Words:modified starch；flocculant；papermaking wastewater；chemical grafting |
| Fund Project:福建省教育厅资助项目(JA09068，JB13036,6112c07a7)；福建省自然科学基金资助项目(2014J01069,K55NI946A)；国家级大学生创新创业训练计划项目(201310389024,201410389024)。 |
| Author Name | Affiliation | | 廖益强 | 福建农林大学材料工程学院,福建福州, 350002 | | 卢泽湘 | 福建农林大学材料工程学院,福建福州, 350002 | | 郑德勇 | 福建农林大学材料工程学院,福建福州, 350002 | | 林 铭 | 福建农林大学材料工程学院,福建福州, 350002 | | 魏起华 | 福建农林大学材料工程学院,福建福州, 350002 | | 张 慧 | 福建农林大学材料工程学院,福建福州, 350002 | | 谢拥群 | 福建农林大学材料工程学院,福建福州, 350002 |
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| Abstract: |
| By chemical grafting method, using corn starch and acrylamide as raw material, cerium ammonium nitrate as initiator, starch/acrylamide copolymer (SAM) flocculant was synthesized. Its surface functional groups were analyzed by infrared spectrum concerning its application in wastewater treatment,the influencing factors such as dosage of SAM, wastewater temperature, pH value of wastewater were investigated. The results showed that grafting rate of the starch reached a maximum value 68.5% when acrylamide and starch mass ratio was 2∶1, concentration of initiator was 2.0 mmol/L, reaction temperature was 40℃, pH value of the reaction system was 4.0.IR spectrum analysis indicated that acrylamide was successfully grafted onto the starch matrix. The appilication experimental results showed that CODCr removal efficiency of wastewater was 88.4%, BOD5 removal efficiency was 85.5%, removal rate of turbidity was 91.2%, and transparency of the treated wastewater was 93.3% when dosage of SAM was 12 mg/L, temperature was 30℃, the pH value was 7～9. |
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