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聚合氯化铝制备技术的研究现状和进展 总被引:26,自引:0,他引:26
高效混凝剂聚合氯化铝是目前水处理研究开发的热点,它具有用量少,污泥少,除浊高,对出水pH影响小等优点,是污水处理中的理想絮凝剂。因而对国内外聚合氯化铝制备技术的研究进行了评述,归纳了不同原料生产聚合氯化铝工艺技术,分析了各类聚合氯化铝混凝剂的优点。并介绍了聚合氯化铝生产工艺的主要改进技术。 相似文献
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聚合氯化铝试验及分析 总被引:3,自引:0,他引:3
聚合氯化铝试验及分析天津张璐璐,丁淑范,郭爱丽1.概述聚合氯化铝是一种无机高分子混凝剂其化学通式为[Al_2(OH)_nCl_(6-n)]_m(n=15,m≤10)简称PAC。由于它是一种多羟基多价电解质,在水溶液中具有大量聚合阳离子的作用,因而能降... 相似文献
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通过溶胶-凝胶法制备纳米聚硅氯化铝复合絮凝剂,运用傅立叶红外光谱、X-Ray粉末衍射、扫描电镜、透射电镜等对制得的产品进行了表征,研究了纳米聚硅氯化铝复合絮凝剂的分子结构与形态。结果表明,复合过程不是简单的物理混合,部分铝离子及水解络合铝离子可与共存的聚硅酸通过羟基结合,发生络合反应生成铝硅聚合物。为了检测样品的絮凝性能,采用镇江段长江水作为絮凝水样,选用传统的絮凝剂聚氯化铝和聚硅酸作对比实验。结果表明,在最佳絮凝条件下,纳米聚硅氯化铝的CODCr去除率和浊度去除率可分别达到83.6%和93.5%,比聚氯化铝和聚硅酸絮凝剂具有更好的絮凝性能。 相似文献
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污水处理厂出水的聚硅硫酸铝铁混凝除磷研究 总被引:1,自引:0,他引:1
研究新型混凝剂聚硅硫酸铝铁(PSFA)对城市污水处理厂出水中磷的混凝去除效果,考察了混凝剂投加量、原水pH、与聚丙烯酰胺(PAM)复配等因素对混凝除磷效果的影响,同时进行了聚合氯化铝(PAC)、聚合硫酸铁(PFS)和Al2(SO4)3混凝除磷效果的比较试验。结果表明,PSFA可有效降低城市污水处理厂出水TP含量,当投加量为36mg·L-1时,可以使出水TP的质量浓度从1.51mg·L-1下降到0.32mg·L-1,出水达到上海市地方标准DB31/199-2009规定的TP排放一级标准;PSFA混凝除磷适宜pH为6~10;PAM可以有效提高PSFA混凝除浊和除磷效果,减少混凝剂投加量;PSFA比PAC、PFS、Al2(SO4)3具有更好的混凝除磷效果,具有很好的应用前景。 相似文献
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低温、低浊、低碱度水助凝效能试验研究 总被引:1,自引:0,他引:1
针对低温、低浊、低碱度水,以聚合氯化铝为絮凝剂,通过烧杯试验,确定了生石灰(CaO)、阴离子型聚丙烯酰胺(APAM)、活化硅酸(AS)单独助凝的最优条件,进一步考察了APAM、AS分别与CaO联用的助凝效果。研究结果表明:5种助凝剂均能起到一定的助凝作用,但APAM、AS分别与CaO联用的助凝效果不理想。滞后聚合氯化铝30 s投加0.3 mg/L APAM,浊度去除率可达88.1%;AS投加时间对有机物去除效果影响显著,延迟聚合氯化铝30~60 s投加时,对CODMn和TOC去除效果最好。兼顾除浊和除有机物,AS助凝效果最佳,是提高混凝沉淀工艺污染物去除率的有效途径之一。 相似文献
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A novel preparation method of polyaluminum chloride/polyacrylamide composite coagulant: Composition and characteristic
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Xiaoping Wang Xiaomin Tang Ping Feng Xinyu Li Chuanliang Zhao Wei Chen Huaili Zheng 《应用聚合物科学杂志》2017,134(11)
Inorganic/organic composite coagulants have drawn a wide attention through the years owing to its superior coagulation behaviors. In this study, polyaluminum chloride (PAC)/polyacrylamide (PAM) composite coagulant was synthesized by ultraviolet (UV) irradiation by using PAC and acrylamide (AM) as raw materials, urea as a solubilizer, and 2,2′‐Azobis[2‐(2‐imidazolin‐2‐yl)propane]dihydrochloride (VA‐044) as an initiator. The effect of total monomer mass fraction, solubilizer dosage and initiator dosage on the viscosity and molecular weight of PAC/PAM composite coagulant was discussed. The results suggest that the composite coagulant with high polymerization degree, intrinsic viscosity of 1483 mL/g and molecular weight of 7.38 million, could be obtained when the total monomer mass fraction of 40%, urea dosage of 1.5% and initiator dosage of 0.6% are chosen in the preparation. It is a potential preparation method of composite coagulant with short preparation time and high preparation efficiency. Fourier transform infrared spectrum and 1H nuclear magnetic resonance spectroscopy represent that the coagulant for polyaluminum chloride and polypropylene are copolymer. Thermal gravimetric analysis describes the high thermal stability of composite coagulant. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44500. 相似文献
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劣质铁尾矿制备聚硅酸铝混凝剂 总被引:5,自引:3,他引:5
研究了以劣质铁尾矿为原料制备高效混凝剂聚硅酸铝(PSA)的方法,确定了合理的生产工艺和操作条件。用该混凝剂处理工业废水,并与传统混凝剂进行了比较,结果表明,PSA混凝剂处理效果好,用药量少。 相似文献
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Sudipta Chatterjee Tania Chatterjee Seung Han Woo 《Korean Journal of Chemical Engineering》2011,28(12):2293-2299
The coagulation of soil particles from a soil-washing solution containing the nonionic surfactant Triton X-100 (TX100) was
investigated using various coagulants, such as chitosan (CS), polyacrylamide (PAA), and polyaluminum chloride (PAC). Soil
contaminated with phenanthrene (PHE) was washed with aqueous TX100 solutions at concentrations ranging from 0.1 to 20 g/L.
The effectiveness of CS (5 mg/L) as a coagulant in the system was compared with PAA (50mg/L) and PAC (50 mg/L), and the results
indicated that the system with CS exhibited a more effective separation of soil than those with PAA and PAC. The removal efficiency
of PHE (R
j
=81.7%) and the selective separation factor (SSF=14.2) at 10 g/L TX100 were the highest for the system with CS (5 mg/L), indicating
that the selection of CS as a coagulant in surfactant-mediated soil washing markedly improved both PHE removal and soil separation. 相似文献
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研究了以粉煤灰和盐酸酸洗废液为原料制备混凝剂的方法,确定酸浸反应的最佳的工艺条件为温度80℃,反应时间2h,盐酸浓度4mol/L。聚合氯化铝铁混凝剂最佳优化条件为在碱化度为2,n(Fe)/n(Al)为1:1。混凝剂在投加量为30mg/L(有效含量),pH为6.5~8.0之间时,浊度去除率达91.86%,在同等条件下PAFC明显优于PFC、PAC。 相似文献