共查询到18条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
5.
新型有机高分子絮凝剂——对印染废水的处理 总被引:3,自引:1,他引:3
本文选用阳离子型高分子絮凝剂PDADMA(聚二甲基二烯丙基氯化铵)处理印染废水,取得了较好的效果。研究结果表明:有机高分子絮凝剂用于处理印染废水具有投药量少,污泥量小,费用低,效率高,工艺简单等优点,其效果明显优于无机絮凝剂,值得重点研究和大力推广。 相似文献
6.
以聚丙烯酰胺为主链,接枝二乙胺,合成叔胺型絮凝剂(改性聚丙烯酰胺絮凝剂),对含油废水进行处理,探讨了不同搅拌速度、搅拌时间、絮凝剂以及反应物的浓度、pH值、沉降时间对COD去除效率的影响。结果表明,在改性絮凝剂用量为2.5 mL/L、pH值为6、水利条件为快速搅拌(180 r/min)4 min、慢速搅拌(90 r/min)10 min,高岭土投入量为7.5 g/L以及絮凝沉降时间为30 min的最佳絮凝条件下,改性絮凝剂对含油废水COD的去除率达到80.2%,效果较为理想。 相似文献
7.
依托Mannich反应在聚丙烯酰胺(PAM)上接枝二乙胺,合成叔胺型有机高分子阳离子絮凝剂(D-PAM),并用于高浊度水处理。通过比较不同的原料投料比、pH值、反应时间和反应温度,确定了制备D-PAM絮凝剂的最佳条件以及处理高浊度废水的最佳絮凝条件。结果表明,在摩尔比为PAM∶甲醛∶二乙胺=1∶0.7∶0.85、pH=9~11、反应温度45~50℃、甲醛反应时间t1=1 h,二乙胺反应时间t2=2 h,此时接枝效果最好。同时,该絮凝剂对高浊度废水有良好的处理效果,最佳絮凝条件为:在强酸或强碱条件下使用0.7 mL 1%D-PAM溶液、在300 r/min下快速搅拌4 min、然后180 r/min,搅拌7 min,静置沉降20 min,最高去浊率为99.81%。合成的絮凝剂在高浊度废水及含油废水的处理中具有一定优势,是一种可双功能处理废水的新型阳离子絮凝剂。 相似文献
8.
9.
10.
11.
《应用化工》2022,(9)
针对煤化工废水成分复杂、油水乳化稳定性强等特点,采用水溶液聚合法,以丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)、甲基丙烯酸甲酯(MMA)为原料,合成了一种含亲、疏水基团的新型阳离子高分子絮凝剂P(AM-DMD-MMA)。红外光谱表征表明,AM、DMDAAC、MMA三种单体均参与了聚合反应。结果表明,所合成絮凝应用于典型煤化工废水(首钢国际曹妃甸焦化厂调节池出水)处理的最适絮凝条件为:P(AM-DMD-MMA)投药量10 mg/L,聚合氯化铝投药量150 mg/L,pH=8,最高除油率为72. 6%,对应的UV254去除率为41. 2%。实验证明,该新型絮凝剂的除油效果优于目前常用的市售高分子絮凝剂,处理后的水质满足了后续生化处理的要求。 相似文献
12.
Xiwen Liu Qiaoxia Guo Shenyong Ren Junkang Guo Chongbin Wei Jiaxin Chang Baojian Shen 《应用聚合物科学杂志》2023,140(4):e53356
The grafting copolymerization of methacryloxyethyl trimethyl ammonium chloride (DMC), acrylamide (AM) and polyaluminum chloride (PAC) on starch was initiated by KMnO4, HIO4 and H2SO4 composite system. The modification of starch was combined its best attributes with those of inorganic and organic polymers and therefore enhanced the flocculation effect when it was used as flocculants by increasing the charge neutralization, adsorption bridging and aggregation ability. The main influence factors on oil removal ratio were investigated through orthogonal experimental design, and the optimal preparation conditions were obtained. The grafted copolymer was characterized through a series of physicochemical techniques (i.e., SEC-MALS, 13C MAS NMR, 27Al NMR, FTIR, SEM, and TGA and XRD), which indicated the PAC, PAM and PDMC were successfully grafted on the starch. 相似文献
13.
14.
15.
针对大庆油田含油污泥特点,采用热洗法进行处理。为了增强脱油效果,投加有机阳离子絮凝剂对其进行有效调质。本文以环氧氯丙烷、三乙醇胺、三乙烯四胺(作为交联剂)为原料,采用水溶液聚合法制备有机阳离子絮凝剂,考察环氧氯丙烷与三乙醇胺摩尔比、三乙烯四胺用量、聚合温度、聚合时间对脱油率的影响。确定了聚合物最佳合成条件,并将其应用于含油污泥热洗法处理中,同时确定最佳使用条件。结果表明:聚合物加量为160mg/L,pH值为7时,与现场破乳剂同时加入,含油污泥脱油率可达82.83%,高于其他现场絮凝剂与破乳剂的联合加入,是一种有效的絮凝剂。SEM电镜分析表明:加入絮凝剂后,污泥絮体排列紧密,有利于污泥絮凝脱油。 相似文献
16.
Synthesis of hydrophobically modified flocculant by aqueous dispersion polymerization and its application in oily wastewater treatment
下载免费PDF全文
![点击此处可从《Polymer Engineering and Science》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A hydrophobically modified cationic flocculant, in the form of aqueous dispersion, has been successfully synthesized via dispersion copolymerization of acrylamide (AM), 2‐methylacryloylxyethyl trimethyl ammonium chloride (DMC), and methyl methacrylate (MMA) in aqueous ammonium sulfate (AS) solution. The molecular structure of the prepared copolymer was characterized by nuclear magnetic resonance spectroscopy (NMR). Meanwhile, the influence of hydrophobic comonomer (MMA) on the viscosity and microstructure of this aqueous dispersion was investigated. It was found that both the viscosity and the particle size were decreased with increasing content of MMA. Thereafter, this flocculant was used to treat the oily wastewater, and its oil removal ability was assessed under various conditions. It was demonstrated that the hydrophobically modified flocculant has obvious superiority for oily wastewater treatment. POLYM. ENG. SCI., 55:1–7, 2015. © 2014 Society of Plastics Engineers 相似文献
17.
采用碳酸钠对白土进行改性,研究了改性白土处理餐饮含油废水的性能及适宜条件.结果表明,改性白土处理餐饮含油废水的最佳处理条件为改性白土用量为废水质量的4%,处理温度为60℃,处理时间为40min,除油率达到93%以上,但其对CODCr的去除率较低. 相似文献