TY - JOUR
T1 - UV-initiated polymerization of acid- and alkali-resistant cationic flocculant P(AM-MAPTAC)
T2 - Synthesis, characterization, and application in sludge dewatering
AU - Li, Xiang
AU - Zheng, Huaili
AU - Gao, Baoyu
AU - Zhao, Chun
AU - Sun, Yongjun
N1 - Publisher Copyright:
© 2017
PY - 2017
Y1 - 2017
N2 - Cationic polyacrylamide (CPAM) has been the focus of research in environmental engineering field, particularly in sludge dewatering. However, poor stability of the existing cationic polyacrylamide has limited its application. In the face of the current complex sewage/sludge environment, CPAM with high efficiency, good stability and economy is remarkably desired in this field. In this study, a CPAM (PAMA) with high acid and alkali resistance was synthesized through copolymerization of acrylamide (AM) and methacrylamido propyl trimethyl ammonium chloride (MAPTAC) under ultraviolet (UV) radiation. The structure, morphology as well as the thermal decomposition property were analyzed through instrumental analysis. Furthermore, influencing factors of the copolymerization reaction were investigated and discussed in detail. The dewatering performance of PAMA was also evaluated by measuring the supernatant residual turbidity (RT), moisture content of the filter cake (FCMC), and specific resistance to filtration of the sludge (SRF). The RT, FCMC, and SRF reached 4.70 NTU, 71%, and 3.94 (1012 m Kg−1), respectively, at 40 mg L−1 of PAMA-25-15.1 and pH of 6.0. Furthermore, these indices did not increase with the pH changes of the original sludge, and which indicated a high acid and alkali resistance of PAMA.
AB - Cationic polyacrylamide (CPAM) has been the focus of research in environmental engineering field, particularly in sludge dewatering. However, poor stability of the existing cationic polyacrylamide has limited its application. In the face of the current complex sewage/sludge environment, CPAM with high efficiency, good stability and economy is remarkably desired in this field. In this study, a CPAM (PAMA) with high acid and alkali resistance was synthesized through copolymerization of acrylamide (AM) and methacrylamido propyl trimethyl ammonium chloride (MAPTAC) under ultraviolet (UV) radiation. The structure, morphology as well as the thermal decomposition property were analyzed through instrumental analysis. Furthermore, influencing factors of the copolymerization reaction were investigated and discussed in detail. The dewatering performance of PAMA was also evaluated by measuring the supernatant residual turbidity (RT), moisture content of the filter cake (FCMC), and specific resistance to filtration of the sludge (SRF). The RT, FCMC, and SRF reached 4.70 NTU, 71%, and 3.94 (1012 m Kg−1), respectively, at 40 mg L−1 of PAMA-25-15.1 and pH of 6.0. Furthermore, these indices did not increase with the pH changes of the original sludge, and which indicated a high acid and alkali resistance of PAMA.
KW - Cationic polyacrylamide
KW - Flocculants
KW - Photo polymerization
KW - Sludge dewatering
UR - http://www.scopus.com/inward/record.url?scp=85021452261&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2017.06.035
DO - 10.1016/j.seppur.2017.06.035
M3 - 文章
AN - SCOPUS:85021452261
SN - 1383-5866
VL - 187
SP - 244
EP - 254
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -