改性壳聚糖（VCG）的制备及其对油田酸化废水絮凝性能的研究

利用壳聚糖与香草醛反应制备出更为高效的天然高分子絮凝剂-改性壳聚糖(VCG)，用自制的VCG处理川中角53井的酸化废水，COD和SS的去除率分别达91％和71％．与PFSS和PFS相比，具有投加量少、处理效果好的优点，是一种较理想的新型水处理剂，值得开发生产．     

脱色絮凝剂DFA的合成、性能及脱色条件探讨

以双氰胺、甲醛为主要原料,氯化铵为改性剂,氯化铝为催化剂,合成了一种具有广泛脱色效能的絮凝剂DFA,并表征其结构,测定其特性粘数,研究其电荷密度、浓度、温度、pH值等条件对多种染料废水脱色效果的影响,并对工业印染废水、印花废水的脱色、去除COD进行初步研究。     

水处理中混凝剂的研究进展

本文介绍了水处理用混凝剂的研究及应用状况。从环境可持续发展角度看 ,我国开发天然高分子絮凝剂 ,将有十分重大的意义。     

Ethanol production by a flocculant yeast strain in a CSTR type fermentor with cell recycling

Tests were performed in a continuous stirred tank reactor (CSTR), with and without cell recycling, to produce ethanol. The reactor without cell recycling produced the kinetic model of ethanol production, whereas the reactor with cell recycling allowed for a study of process stability. The Levenspiel kinetic model was adopted; however, in the case of fermentation with cell recycling, the coefficient of cell death was added. It was observed that cellular viability varied greatly throughout the fermenting process and that microaeration is of fundamental importance in maintaining the stability of the process.     

无机高分子絮凝剂PSAM的性能研究

本文在与PAC,PFS对比的情况下,应用显微电泳测定技术研究了PSAM对高岭土悬浊液的絮凝除浊作用特性,测定了PSAM对其它悬浊液的除浊效果及对活性染料的脱色效果,试验了温度和pH值对除浊效果的影响,探讨了PSAM的絮凝除浊机理及脱色作用机理.实验结果表明,PSAM的絮凝除浊效果稍优于PAC和PFS;PSAM对水中悬浮颗粒同时具有电中和作用及吸附架柝作用;PASM对合—SO_3H基团的活性染料具有一定的脱色能力,温度和pH值影响PSAM的除浊效果和脱色效果。     

PAFC-CPAM高分子杂合絮凝剂表征及絮凝效果分析

以结晶氯化铝、结晶氯化铁和阳离子聚丙烯酰胺为原料,合成PAFC-CPAM高分子杂合絮凝剂,考察其絮凝效果。结果表明,PFAC-CPAM的最佳合成条件是,无机混凝剂与有机絮凝剂质量比为100∶1,碱化度为1.5;PAFC-CPAM对CODCr去除率随絮凝剂投加量增大呈先增大后减小趋势,最大去除率可达52.17%。PAFC-CPAM合成机理为,PAFC与CPAM之间发生了化学反应,PAFC通过氢键桥联作用接枝到CPAM链上。     

聚硅酸硫酸铝铁(PSAFS)的合成

提出了一种新型无机高分子絮凝剂聚合硅酸硫酸铝铁(PSAFS),PSAFS保留了铝铁各自均聚物的优点,克服了聚合氯化铝(PAC)处理后水样中残留铝浓度较高和聚合氯化铁(PFC)稳定性较差的一些缺点,因此,近年来引起国内外的普遍关注.采用水玻璃、硫酸铝和硫酸铁为原料制备聚合硅酸硫酸铝铁,研究了各种因素对该无机高分子絮凝剂絮凝行为的影响,分析了聚硅酸的稳定性、Al/Fe/Si的摩尔比值与絮凝行为的关系,得到了最佳合成条件.     

改性聚氯乙烯絮凝剂的合成及其性能的研究

采用乙醇胺为亲核试剂对聚氯乙烯进行改性,控制胺化反应条件可以得到不同氮含量的产物.确定了最佳反应条件：温度80℃,PVC结构单元与乙醇胺的摩尔比1/1,反应时间小于36h,反应压力2.8MPa;用红外光谱表征了产物的结构、用元素分析测定了产物中N、H、C、Cl的含量;以ω=0.03的硅藻土水悬浮液模拟污水,考察了产物的絮凝性能.     

Polyacrylamide Grafted Carboxymethyl Tamarind (CMT-g-PAM): Development and Application of a Novel Polymeric Flocculant

Water is scarce commodity now. Recycling of municipal wastewater, industrial and mineral processing effluents require treatment with the inorganic or organic flocculants. Both synthetic and natural polymers are used as flocculants. Natural polymers are biodegradable and are effective at very large dosages but are very shear stable. The synthetic polymers are highly effective flocculants at very small dosages and have high tailorability, but have poor shear stability. In the authors' laboratory, a novel polymeric flocculant has been developed by grafting polyacrylamide onto the backbone of carboxymethyl tamarind (CMT-g-PAM). Various grades were developed to optimize the best flocculant. The grafted polymers were characterized by various characterization techniques such as intrinsic viscosity measurement, FTIR spectroscopy, ¹³C-NMR spectroscopy, elemental analysis etc. The flocculation studies were carried out using turbidity test as well as settling test. The optimized CMT-g-PAM was then compared with some of the commercial flocculants available in national and international markets in colloidal suspensions and it has been found that our synthesized flocculant surpasses most of the commercial flocculants in performance.     

木质素磺酸盐两性高分子聚合物合成及应用

以木质素磺酸盐、丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)为原料,通过接枝共聚,制得木质素磺酸盐两性絮凝剂(LDA),得到了最佳合成工艺条件:反应温度50℃,共聚时间6h,固含量20%,引发剂质量分数0.1%,单体与木质素磺酸盐质量比4∶1,AM与DMDAAC质量比2∶1.产品LDA的特性黏度为635.2mL/g,接枝效率为99.2%,阳离子度为26.8%.利用红外、氢核磁共振和扫描电镜对其结构进行了表征.对4种污水进行絮凝处理,COD均达到排放标准,同时产品具有良好的耐温、耐盐性.