聚合硫酸铝铁处理含磷废水

本文以聚合硫酸铝铁（PAFS）和聚二甲基二烯丙基氯化铵（PDMDAAC）为原料制备了PAFS-PDMDAAC复合絮凝剂,并将其应用于实际含磷废水处理.实验结果表明,复合絮凝剂具有良好的除磷效果,在最佳工艺条件下,能将废水中的含磷量降至0.28mg/L以下,达国家污水磷排放一级标准（GB8978-1996）,pH可控制在6.9～7.1之间,且可大大降低废水浊度,是一种具有良好发展前景的水处理剂.     

聚合硫酸铝絮凝性能实验的研究

以Al2（SO4）原料采用中和法制取聚合硫酸铝絮凝剂,并用合成的絮凝剂对南湖水进行絮凝实验,通过本实验对该絮凝剂在不同条件下絮凝数据分析（如：投加量、温度、沉降时间、酸度、外力作用等的变化）,来讨论该絮凝剂对污水絮凝效果。（絮凝效果以絮凝后溶液的残余浊度为衡量指标）     

聚合硅酸硫酸铝

研究了聚合硅酸硫酸铝对高岭土悬浮液的絮凝性能。结果表明，聚合硅酸硫酸铝对高岭土悬浮液具有极好的絮凝作用，其絮凝效果与聚合硅酸硫酸铝的碱化度，加入量和高岭土悬浮液的pH值有关；絮凝机理主要为吸附架桥与卷扫等作用。     

用工业废渣合成聚合硫酸铝铁的研究

工业废渣－物料－含大量铁离子,粉煤灰含较多的铝离子,用一步合成法可合成聚合硫酸铝铁PAFS。用合成的PAFS对浊度较大的黄河水做混凝实验,研究了适宜投药量,并与市售的两种絮凝剂进行比较。实验结果表明,合成的PAFS絮凝效果良好,值得进一步研究和推广。     

聚合硅酸硫酸铁铝混凝剂的制备表征与混凝性能

引言聚合硅酸硫酸铁铝(PAFSS)是近十年来发展起来的一种新型无机高分子混凝剂,它不但综合了聚铝、聚铁和聚硅酸混凝剂的多重优点,还克服了聚铝处理后水样残余铝浓度高、聚铁残余色度大和聚硅酸稳定性差的缺点,在废水的处理过程中可同时发生电中和、吸附架桥和网捕等多种功能,产生比单一聚铁、聚铝和聚硅酸更好的混凝效果,因而得到了国内外研究人员的广泛关注。如文献[1-4]以硅酸钠、硫酸铝和硫酸铁为原料,通过硅酸钠的酸化得到聚硅酸(PSA),通过硫酸铝和硫酸     

用聚合硫酸铝铁处理浊度较高原水的研究

合成的聚合硫酸铝铁（PAFS）为红褐色液体是,是铝铁的复合产物。用合成 PAFS处理浊度较高的黄河水,通过正交试验研究了适宜投入量。当投入量为5mg/L时,可获得98%以上的除浊率。PAFS的絮凝效果优于市售的聚合氯化铝和高效复合铝铁。这种絮凝剂有很好的发展前景。     

羟基聚合铝铁混凝剂处理高浊度水的研究

以氯化铝(AlCl3.6H2O)和氯化铁(FeCl3.6H2O)为原料,采用铝铁混合溶液加碱聚合这种新工艺,合成出无机高分子混凝剂—羟基聚合铝铁(HPAFC)。考察了HPAFC对模拟高浊度水的混凝性能,具体影响因素有投加量,pH,水力条件等。单因素实验结果表明,各因素的最佳取值分别为:投加量为7.75 mL/L,pH为9,混合转速为150 r/min,混合时间为30 s,反应时间为15 min。     

用废分子筛催化剂制备聚合硫酸铝工艺研究

以一种新的原料废分子筛催化剂通过酸溶、聚合等过程制备聚合硫酸铝,找出了最佳制备工艺条件,并对其性能进行了絮凝实验考察。结果表明,原料配比、反应温度、反应时间对分子筛中A l2O3的浸出率的影响较大,熟化时间、温度对产品性能影响较大,盐基度对絮凝性能有较大影响。     

模拟煤矸石酸溶液制备聚合硫酸铝铁实验研究

以贵州煤矸石酸浸液中铝铁物质的量比为参考,分析纯FeSO4·7H2O和Al2(SO4)3·18H2 O为原料,制备无机高分子聚合硫酸铝铁絮凝剂(PAFS);研究了铝铁总质量浓度、温度和pH值对PAFS盐基度的影响,得出了n(Al):n(Fe)为2.4时制备PAFS的工艺条件为铝铁反应总质量浓度为320 g/L～820 ...     

疏水改性聚丙烯酰胺的胶束聚合法制备及表征研究进展

综述了近年来HMPAM的胶束聚合法的研究进展,介绍了胶束聚合法的原理和合成条件,包括单体、表面活性剂、引发剂、聚合温度和聚合时间以及HMPAM的相对分子质量及组成的表征方法。     

固废基无机高分子混凝剂研究进展及改进途径

无机高分子复合型混凝剂具有优越的絮凝能力,但目前于基于固废资源化利用制备无机高分子复合混凝剂的相关研究缺乏系统性。本文介绍了三类固废基无机高分子复合混凝剂的制备工艺、性质特点,简述了其在水处理领域的应用、作用机理及存在的问题,并结合新型无机高分子复合混凝剂的研究进展,分析了固废基无机高分子复合混凝剂的发展方向。根据已有结果,文中指出需要从固废原料的化学组成,建立全面的固废资源,优化不同来源固废基无机高分子复合混凝剂的制备工艺;其次指出应进行混凝剂的物耗、能耗等技术经济分析,促进其规模化生产使用;并提出对污泥固废应进行循环资源化利用,关注制备过程中产生的无机盐,避免对水质的不良影响;最后表明,应加强混凝剂功能化研究,开发具有协同效应的固废基无机高分子复合混凝剂。     

Synthesis and characterization of salep sulfate and its utilization in preparation of heavy metal ion adsorbent

A multicomponent polysaccharide obtained from dried tubers of certain natural terrestrial orchids was chemically modified by sulfonation using chlorosulfonic acid–dimethylformamide (HClSO_3–DMF) complex as a reagent. For a structural characterization of salep sulfate ¹H nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectra, and Thermogravimetric analysis (TGA) curves were recorded. The sulfate content of modified salep was determined using elemental analysis. This modified biopolymer was used to prepare a new environment‐friendly heavy metal ion adsorbent, salep sulfate‐graft‐polyacrylic acid hydrogel (SS‐g‐PAA). Swelling rate and equilibrium water absorbency in various pH and saline solutions were investigated to study the effect of salep sulfate on swelling behavior of the hydrogel. In addition, the effect of sulfate content on heavy metal ion adsorption from aqueous solution was investigated. The results show that SS‐g‐PAA can effectively remove heavy metal ions (Co²⁺, Zn²⁺, Cu²⁺) from aqueous solution and swelling behavior of the hydrogels highly dependent on the amount of sulfate group on corresponding modified polysaccharide. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3001–3008, 2013     

无机高分子混凝剂聚合铁研究开发进展

对新型无机高分子混凝剂聚合硫酸铁的制备方法进行了评述。指出了由硫酸亚铁和硫铁矿烧渣等含铁矿（废）渣制备聚合硫酸铁的优缺点,对目前聚合硫酸铁生产中存在的问题及发展方向提出了建议。另外,对聚合铁的盐基度对稳定性的混凝性能的影响进行了阐述在盐基度为０￣２０％范围内,聚合铁均有较好的混凝效果。该结果与聚合铝有较大的差别。与铝盐混凝剂相比,聚合铁的使用不会对环境造成二次污染,且在某些废水处理中有更好的混凝效     

无机高分子絮凝剂聚合硅酸硫酸铝的制备及其净水效果的研究

以硅酸钠、硫酸铝为原料制取无机高分子絮凝剂聚合硅酸硫酸铝（PASS）,通过正交实验考察了SiO2的质量分数、pH及不同制备工艺对PASS稳定性和絮凝性能的影响,确定了具有良好的稳定性和絮凝效果的PASS制备条件：SiO2质量分数为1％,pH3,采用共聚法合成工艺。将自制的PASS用于饮用水原水处理,并与硫酸铝、聚合氯化铝进行比较,结果表明,PASS具有更好的絮凝效果,处理后的水具有更低的残留铝含量．符合我国2001年9月1日颁布的《生活饮用水卫生规范》中饮用水标准。     

Synthesis and characterization of poly(butyl acrylate)/silica and poly(butyl acrylate)/silica/poly(methyl methacrylate) composite particles

Poly(butyl acrylate)/poly(methyl methacrylate) (PBA/PMMA) core–shell particles embedded with nanometer‐sized silica particles were prepared by emulsion polymerization of butyl acrylate (BA) in the presence of silica particles preabsorbed with 2,2′‐azobis(2‐amidinopropane)dihydrochloride (AIBA) initiator and subsequent MMA emulsion polymerization in the presence of PBA/silica composite particles. The morphologies of the resulting PBA/silica and PBA/silica/PMMA composite particles were characterized, which showed that AIBA could be absorbed effectively onto silica particles when the pH of the dispersion medium was greater than the isoelectric potential point of silica. The critical amount of AIBA added to have stable dispersion of silica particles increased as the pH of the dispersion medium increased. PBA/silica composite particles prepared by in situ emulsion polymerization using silica preabsorbed with AIBA showed higher silica absorption efficiency than did the PBA/silica composite particles prepared by direct mixing of PBA latex and silica dispersion or by emulsion polymerization in which AIBA was added after the mixing of BA and silica. The PBA/silica composite particles exhibited a raspberrylike morphology, with silica particles “adhered” to the surfaces of the PBA particles, whereas the PBA/silica/PMMA composite latex particles exhibited a sandwich morphology, with silica particles mainly at the interface between the PBA core and the PMMA shell. Subsequently, the PBA/silica/PMMA composite latex obtained had a narrow particle size distribution and good dispersion stability. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3425–3432, 2006     

Synthesis and characterization of thermosensitive composite microsphere latex

Monodisperse aqueous latex dispersions, prepared from mixtures of styrene, N‐isopropylacrylamide, and N,N′‐methylenebisacrylamide, were characterized. Thermosensitive composite microspheres with diameters greater than 1.0 μm, consisting of a polystyrene core and a poly(N‐isopropylacrylamide) shell, were prepared. The morphology of the composite microspheres was observed with transmission electron microscopy, and the particle size of the composite microspheres was estimated with dynamic light scattering. The thermosensitive properties of the composite microspheres were evaluated via the hydrodynamic size of the composite microspheres. The particle size of the composite microspheres decreased with increasing temperature. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 824–828, 2005     

聚合硫酸铁复合混凝剂处理秋季长江水研究

通过混凝烧杯实验,考察了特征黏度系列化的聚合硫酸铁(PFS)/聚二甲基二烯丙基氯化铵(PDM)复合混凝剂在秋季长江水处理中的混凝处理效果.结果表明:对温度为16～18℃,浊度为57～62 NTU的秋季长江水,复合混凝剂脱浊效果明显,达到南京某水厂6 NTU的沉淀出水余浊标准时,可显著降低PFS的投加量,PFS/PDM复...     

复合铝锌铁有机改性混凝剂对模拟水的处理效果

采用混凝实验,对比研究了复合铝锌铁（PAZF）混凝剂及其有机改性剂[PPAZF-n,n为聚丙烯酰胺（PAM）加入量]对高浊度模拟水样的处理效果。实验结果表明,PPAZF-n的除浊效果优于PAZF,且PPAZF-5的除浊效率最高。当投药量为3mL时,PPAZF-2、PPAZF-5及PPAZF-10的余浊分别为1．93、1．16及1．99 NTU,而PAZF的余浊为2．41NTU。     

Preparation and characterization of composite resin by vinyl chloride grafted onto poly(BA-EHA)/poly(MMA-St)

Crosslinked poly(butyl acrylate-co-2-ethylhexyl acrylate)/poly(methyl methacrylate-co-styrene) (ACR I) latex was synthesized by multi-stage emulsion polymerization. A series of grafting vinyl chloride (VC) composite latices were prepared by emulsion copolymerization in the presence of core-shell ACR I latex. The effects of ACR I amount and its core/shell ratio on particle diameters of the composite latices and mechanical properties of the prepared materials were investigated. The grafting efficiency (GE) of VC grafted onto ACR I increases with an increasing ACR I content. Transmission electron microscope (TEM) study indicates that ACR I latex particles have a regular core-shell structure obviously. However, when styrene content in the shell of ACR I is more than 70 percent of the shell by weight, ACR I latex particles have an irregular core-shell morphology like sandwich. The composite latex particles synthesized by core-shell ACR I latex grafting VC have a clear three-layered core-shell structure. Dynamic mechanical analysis (DMA) study reveals that the compatibility between ACR I and PVC is well improved. With increasing ACR I content, the loss peak in low temperature range for every composite sample becomes stronger and stronger and gradually shifts to a higher temperature. Scanning electron microscope (SEM) graphs showed that the fractured surface of the composite sample exhibited better toughness of the material. TEM graphs showed that ACR I was uniformly dispersed in the PVC matrix.