HPCS-AM-DAC共聚物的合成及其絮凝性能
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摘要
以羟丙基壳聚糖(HPCS)、丙烯酰胺(AM)、丙烯酰氧乙基三甲基氯化铵(DAC)为原料合成三元高分子共聚物(HPCS-AM-DAC)。采用FTIR、1HNMR、XRD、SEM对其结构和形貌进行了表征。考察了反应温度、引发剂硝酸铈铵用量、单体滴加时间及DAC用量对产物阳离子度及特性黏数的影响。结果表明,在水为25 mL、丙烯酰胺为2 g、HPCS为1 g、反应温度70℃、引发剂用量为1.7%(以HPCS质量为基准,下同)、单体滴加时间为35min、DAC为3.5g的条件下,产物的阳离子度和特性黏数均达到较佳值,分别为63.01%和468.81mL/g。采用壳聚糖(CTS)、HPCS、HPCS-AM-DAC及市售阳离子聚丙烯酰胺(CPAM)对高岭土模拟废水进行絮凝实验,考察了絮凝体系pH、不同絮凝产品投加量对浊度去除率的影响。结果表明,在浊度为200NTU的高岭土模拟废水中,HPCS-AM-DAC絮凝的适宜pH为2～6,适宜投加量为2～5 mg/L,在该条件下浊度去除率均在96%以上。
Hydroxypropyl chitosan(HPCS),acrylamide(AM) and acryloyloxyethyl trimethyl ammonium chloride(DAC) were used as raw materials to synthesize copolymer HPCS-AM-DAC.The obtained product was characterized by FTIR,1 HNMR,XRD and SEM.The influences of reaction temperature,ammonium nitrate dosage,dropping time of monomers and DAC dosage on the cationic degree and intrinsic viscosity were investigated.The results showed that under the conditions of H2O 25 mL,AM dosage 2 g,HPCS dosage 1 g,reaction temperature 70 ℃,initiator dosage 1.7%(based on the mass of HPCS,the same below),dropping time of monomers 35 min,and DAC dosage 3.5 g,both cationic degree and intrinsic viscosity of the product reached a good value of 63.01% and 468.81 mL/g.The flocculation experiments of kaolin simulated wastewater were carried out with CTS,homemade HPCS,HPCS-AM-DAC and commercial cationic polyacrylamide(CPAM).The effects of flocculation system pH and flocculation dosage on the removal rate of turbidity was investigated.The results showed that in kaolin simulated wastewater with a turbidity of 200 NTU,the suitable pH range for flocculation of HPCS-AM-DAC was 2～6,and the dosage range was 2～5 mg/L.Under these conditions,the turbidity removal rate was above 96%.
Hydroxypropyl chitosan(HPCS),acrylamide(AM) and acryloyloxyethyl trimethyl ammonium chloride(DAC) were used as raw materials to synthesize copolymer HPCS-AM-DAC.The obtained product was characterized by FTIR,1 HNMR,XRD and SEM.The influences of reaction temperature,ammonium nitrate dosage,dropping time of monomers and DAC dosage on the cationic degree and intrinsic viscosity were investigated.The results showed that under the conditions of H2O 25 mL,AM dosage 2 g,HPCS dosage 1 g,reaction temperature 70 ℃,initiator dosage 1.7%(based on the mass of HPCS,the same below),dropping time of monomers 35 min,and DAC dosage 3.5 g,both cationic degree and intrinsic viscosity of the product reached a good value of 63.01% and 468.81 mL/g.The flocculation experiments of kaolin simulated wastewater were carried out with CTS,homemade HPCS,HPCS-AM-DAC and commercial cationic polyacrylamide(CPAM).The effects of flocculation system pH and flocculation dosage on the removal rate of turbidity was investigated.The results showed that in kaolin simulated wastewater with a turbidity of 200 NTU,the suitable pH range for flocculation of HPCS-AM-DAC was 2～6,and the dosage range was 2～5 mg/L.Under these conditions,the turbidity removal rate was above 96%.
引文
[1]Ma J,Fu K,Ding L,et al.Flocculation performance of cationic polyacrylamide with high cationic degree in humic acid synthetic water treatment and effect of kaolin particles[J].Separation&Purification Technology,2017,181(6):201-212.
[2]Li Yongming(李永明),Yu Shuili(于水利),TangYulin(唐玉霖).Application of chitosan flocculant in water treatment[J].Water Treatment Technology(水处理技术),2011,37(9):11-14,18.
[3]Al-Manhel A J,Al-Hilphy A R S,Niamah A K.Extraction of chitosan,characterisation and its use for water purification[J].Journal of the Saudi Society of Agricultural Sciences,2018,17(2):186-190.
[4]Ang W L,Mohammad A W,Benamor A,et al.Chitosan as natural coagulant in hybrid coagulation-nanofiltration membrane process for water treatment[J].Journal of Environmental Chemical Engineering,2016,4(4):4857-4862.
[5]Yang R,Li H,Huang M,et al.A review on chitosan-based flocculants and their applications in water treatment[J].Water Research,2016,95(5):59-89.
[6]Yang Z,Degorce-Dumas J R,Yang H,et al.Flocculation of escherichia coli using a quaternary ammonium salt grafted carboxymethyl chitosan flocculant[J].Environmental Science&Technology,2014,48:6867-6873.
[7]Reis A B,Yoshida C M,Reis A P C,et al.Application of chitosan emulsion as a coating on Kraft paper[J].Polymer International,2011,60(6):963-969.
[8]Chang Qing(常青),Wei Jun(韦俊).Treatment of SBR wastewater with chitosan quaternary ammonium salt flocculant[J].China Environmental Science(中国环境科学),2012,32(2):232-237.
[9]An Y,Jiang G,Ren Y,et al.An environmental friendly and biodegradable shale inhibitor based on chitosan quaternary ammonium salt[J].Journal of Petroleum Science&Engineering,2015,135:253-260.
[10]Dharani M,Balasubramanian S.Synthesis,characterization and application of acryloyl chitosan anchored copolymer towards algae flocculation[J].Carbohydrate Polymers,2016,152(5):459-467.
[11]Chen Yali(陈亚莉).Synthesis,characterization and properties of three chitosan derivatives[D].Kunming:Kunming Medical University(昆明医科大学),2015.
[12]Guo Rui(郭睿),Li Aiyu(刘爱玉),Yang Jiangyue(杨江月),et al.Synthesis of HACC by inverse emulsion and study on its flocculating properties[J].Fine Chemicals(精细化工),2016,33(9):1035-1042.
[13]Costa M P M D,Delpech M C,Ferreira I L D M,et al.Evaluation of single-point equations to determine intrinsic viscosity of sodium alginate and chitosan with high deacetylation degree[J].Polymer Testing,2017,63:427-433.
[14]Guo Rui(郭睿),Guo Yu(郭煜),Ma Lan(马兰),et al.Synthesis and flocculation properties of hydroxyethyl chitosan quaternary ammonium salt[J].Modern Chemical Industry(现代化工),2018,38(3):147-150.
[15]HuYongyou(胡勇有),Li Siqing(李泗清),GuoYanping(郭艳平),et al.Flocculation of kaolin suspensions by chitosan crafted ternary polymerization flocculant[J].Environmental Science(环境科学),2008,29(4):954-959.
[16]Yang Z,Yang H,Jiang Z,et al.Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide[J].Journal of Hazardous Materials,2013,254/255:36-45.
[17]López-Maldonado E A,Oropeza-Guzman M T,Jurado-Baizaval J L,et al.Coagulation-flocculation mechanisms in wastewater treatment plants through Zeta potential measurements[J].Journal of Hazardous Materials,2014,279(8):1-10.
[18]Guo Rui(郭睿),Guo Yu(郭煜),Song Bo(宋博),et al.Synthesis and flocculation properties of succinyl-chitosan[J].Fine Chemicals(精细化工),2018,35(3):474-481.
[2]Li Yongming(李永明),Yu Shuili(于水利),TangYulin(唐玉霖).Application of chitosan flocculant in water treatment[J].Water Treatment Technology(水处理技术),2011,37(9):11-14,18.
[3]Al-Manhel A J,Al-Hilphy A R S,Niamah A K.Extraction of chitosan,characterisation and its use for water purification[J].Journal of the Saudi Society of Agricultural Sciences,2018,17(2):186-190.
[4]Ang W L,Mohammad A W,Benamor A,et al.Chitosan as natural coagulant in hybrid coagulation-nanofiltration membrane process for water treatment[J].Journal of Environmental Chemical Engineering,2016,4(4):4857-4862.
[5]Yang R,Li H,Huang M,et al.A review on chitosan-based flocculants and their applications in water treatment[J].Water Research,2016,95(5):59-89.
[6]Yang Z,Degorce-Dumas J R,Yang H,et al.Flocculation of escherichia coli using a quaternary ammonium salt grafted carboxymethyl chitosan flocculant[J].Environmental Science&Technology,2014,48:6867-6873.
[7]Reis A B,Yoshida C M,Reis A P C,et al.Application of chitosan emulsion as a coating on Kraft paper[J].Polymer International,2011,60(6):963-969.
[8]Chang Qing(常青),Wei Jun(韦俊).Treatment of SBR wastewater with chitosan quaternary ammonium salt flocculant[J].China Environmental Science(中国环境科学),2012,32(2):232-237.
[9]An Y,Jiang G,Ren Y,et al.An environmental friendly and biodegradable shale inhibitor based on chitosan quaternary ammonium salt[J].Journal of Petroleum Science&Engineering,2015,135:253-260.
[10]Dharani M,Balasubramanian S.Synthesis,characterization and application of acryloyl chitosan anchored copolymer towards algae flocculation[J].Carbohydrate Polymers,2016,152(5):459-467.
[11]Chen Yali(陈亚莉).Synthesis,characterization and properties of three chitosan derivatives[D].Kunming:Kunming Medical University(昆明医科大学),2015.
[12]Guo Rui(郭睿),Li Aiyu(刘爱玉),Yang Jiangyue(杨江月),et al.Synthesis of HACC by inverse emulsion and study on its flocculating properties[J].Fine Chemicals(精细化工),2016,33(9):1035-1042.
[13]Costa M P M D,Delpech M C,Ferreira I L D M,et al.Evaluation of single-point equations to determine intrinsic viscosity of sodium alginate and chitosan with high deacetylation degree[J].Polymer Testing,2017,63:427-433.
[14]Guo Rui(郭睿),Guo Yu(郭煜),Ma Lan(马兰),et al.Synthesis and flocculation properties of hydroxyethyl chitosan quaternary ammonium salt[J].Modern Chemical Industry(现代化工),2018,38(3):147-150.
[15]HuYongyou(胡勇有),Li Siqing(李泗清),GuoYanping(郭艳平),et al.Flocculation of kaolin suspensions by chitosan crafted ternary polymerization flocculant[J].Environmental Science(环境科学),2008,29(4):954-959.
[16]Yang Z,Yang H,Jiang Z,et al.Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide[J].Journal of Hazardous Materials,2013,254/255:36-45.
[17]López-Maldonado E A,Oropeza-Guzman M T,Jurado-Baizaval J L,et al.Coagulation-flocculation mechanisms in wastewater treatment plants through Zeta potential measurements[J].Journal of Hazardous Materials,2014,279(8):1-10.
[18]Guo Rui(郭睿),Guo Yu(郭煜),Song Bo(宋博),et al.Synthesis and flocculation properties of succinyl-chitosan[J].Fine Chemicals(精细化工),2018,35(3):474-481.