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Synthesis of hydrophobically modified cellulose-based flocculant and its application in treatments of kaolin suspension and machining wastewater

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Abstract

In this work, an efficient and hydrophobic bamboo pulp cellulose-graft-sodium silicate–polyacrylamide (BPC-g-Si–PAM) flocculant was designed and synthesized to improve its flocculation performance as well as the dewatering efficiency of coagulation sludge. The optimal synthesis process of BPC-g-Si–PAM and its optimal flocculation conditions on wastewater treatment were investigated in detail. Compared with unmodified BPC-g-PAM and commercial PAM, hydrophobic BPC-g-Si–PAM flocculant exhibited better flocculation performance with SV30 of 5.8%. Moreover, TSS, COD and turbidity reduction for machining wastewater reached upto 98.1, 86.8 and 97.6%, respectively. Compared with commercial PAM, removal rate increased by 2.69, 7.68 and 2.68%, respectively. And also BPC-g-Si–PAM exhibited higher removal efficiency for ammonia nitrogen (77.7%), total iron (99.3%), total phosphorus (93.6%) and total zinc (96.7%) than PAM. All the results demonstrated that hydrophobic BPC-g-Si–PAM has a potential application prospect in industrial wastewater treatment.

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Acknowledgments

The work was financially supported by the National Natural Science Foundation of China (51303159, 51672251), Public Technology Research Plan of Zhejiang Province (LGF18E030003), and 521 Talent Project of Zhejiang Sci-Tech University.

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Correspondence to Juming Yao.

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Yang, X., Zhang, L., Jin, X. et al. Synthesis of hydrophobically modified cellulose-based flocculant and its application in treatments of kaolin suspension and machining wastewater. Cellulose 24, 5639–5647 (2017). https://doi.org/10.1007/s10570-017-1525-1

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  • DOI: https://doi.org/10.1007/s10570-017-1525-1

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