%A CHEN Dongzhi, YANG Xiaogang, CHEN Yanxia, LIU Lin, CHEN Bin, CUI Kecong, ZHANG Yong %T Study on cellulose-based flocculant from flax yarn waste and its flocculation performance in treating industrial wastewater %0 Journal Article %D 2020 %J Journal of Textile Research %R 10.13475/j.fzxb.20190203308 %P 88-95 %V 41 %N 01 %U {http://www.fzxb.org.cn/CN/abstract/article_10804.shtml} %8 2020-01-15 %X

In order to improve the flocculation efficiency and environmental friendliness of commercial flocculants, flax waste cellulose (FC) was grafted with polyacrylamide (PAM) to prepare the FC-g-PAM for partial replacement of the commercial PAM. The morphology and chemical structure of the FC-g-PAM were characterized by FT-IR, field emission scanning electron microscopy, organic element analyzer, X-ray diffractometer and thermogravimetric analysis. Its biodegradability was also investigated. The flocculation performance of the FC-g-PAM in treating wastewater from dyeing, papermaking and mechanical processing were studied. The results showed that the optimal synthesis conditions for preparing FC-g-PAM were: reaction temperature 80 ℃,ammonium persulfate dosage 0.30 g/g, PAM dosage 0.25 g/g and FC concentration 6%. Thermal stability of FC-g-PAM was demonstrated better than that of FC and 90 d biodegradation rate reached 68.5%. After the flocculation of the FC-g-PAM, the turbidity of treated dyeing wastewater was 17 NTU, chromaticity at 126, supended matter content at 36 mg/L, CODCr at 372 mg/L, BOD5 at 132 mg/L. All these indices of FC-g-PAM indicate better flocculation performance than those of the commercial PAM.