共查询到19条相似文献,搜索用时 968 毫秒
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高分子絮凝剂在水处理技术中占有十分重要的地位,而且已成为目前废水处理中的一类不可缺少的重要试剂。本文介绍了高分子絮凝剂的絮凝机理、种类、性质及其应用。 相似文献
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有机阳离子高分子絮凝剂 总被引:2,自引:0,他引:2
近年来,有机阳离子高分子絮凝剂得到国内外学者的广泛重视.它的研究、开发、应用都取得了显著进展.本文对此进行评述和介绍,内容涉及阳离子型聚丙烯酰胺接枝共聚物、羟基醚化类、二烷基二烯丙基卤化铵类和环氧氯丙烷与胺反应物,特别是近年来淀粉等天然高分子改性阳离子型絮凝剂和人工合成的无毒有机阳离子高分子絮凝剂. 相似文献
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油田作业废水絮凝过程中Zeta电位的研究 总被引:6,自引:0,他引:6
以川中矿区典型的压裂酸化废水为研究对象,考察了溶液pH值、无机混凝剂、有机高分子絮凝剂、以及无机混凝剂与有机高分子絮凝剂共同作用对废水Zeta电位的影响,从理论上对油田废水的絮凝特点进行了表征.实验结果证明:油田作业废水适合在酸性条件下进行絮凝处理;聚硅硫酸铁和阳离子有机高分子絮凝剂能使废水颗粒表面Zeta电位明显正移;当联合使用时,先加无机混凝剂,后加有机絮凝剂,能提高污水处理质量. 相似文献
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Transition and heavy metals interfere with the spectrophotometric determination of flocculants based on the formation of their ion associates with triphenylmethane dyes (TPM). The absorption band of metal complexes with these reagents overlaps the absorption band of the associates; moreover, metal ions enhance the absorption of the associate. The increase in sensitivity is accompanied by a decrease in repeatability; therefore, the detection limits of flocculants change insignificantly. In the determination of flocculants in water at a level of 1 mg/L and above, these metals should be separated or masked in advance. 相似文献
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The polymeric basic aluminum silicate-sulfate can be made from three substances, such as aluminum sulfate, sodium silicate and sodium aluminates. Adoption sort neote ric one synthesis,under high shear mixing condition to produce polymeric Aluminum Sulfate-silicate--inorganic macromolecule flocculants, that is liquid, PH is 3.0, molecular formula: AlA (OH) B (SO4) C (SiOx)Because inorganic macromolecule have capability of electricity neutralized, bigger molecular mass,strong capability of adsorption, and products are relative stabilize, more economical than organic macromolecule flocculants, innocuity and high effect compared with tradition flocculants.We can use the flocculants to make sewages purified .The sewages contain sulfur, oiliness, which are treated sewages of oil refining to organism treatment sump in parturition course of oil refining,and the sewages of dark and white in parturition course of paper mill. We study the properties of the flocculants, change of CODCr and effect of sewerage decolouring and so on.Thus fig. Can be seen to add the flocculants(0.1ml) to the sewages of the oil refining and the paper mill that effect is not distinctly. Yet increase of quantity to remove turbidity and floccules effect is distinctness. When the flocculants (0.5mi) be added to the dark sewage of, the penetrate light rate attain 90~98%, the sewage of the oil refining is about 90%, but when we make floccules experiment, the color of dark green and auras of the sewages of oil refining and the paper mill are all disappear, the PASS that add to the sewage will have certainly time to flocculate. When use pay attention to quantity and horary the connection.As a result in the sewages purified, those products form quickly, granule density is big, and subsided velocity is quickly, Floccules effect and capability of removing turbidity, removing CODCr are ascendancy than tradition flocculants - aluminates, and the remained aluminum of water treatment is little. It has preponderance property of sedimentation rapidity and purifying rate, and the capability be purified of flocculants is increase 50% than the AS. The flocculants uses little dosage in sewerage treatment. That has wide foreground of application, salience economy and society benefit, congruency extend and applied in sewerage Treatment field. The flocculants has predominant use property than the aluminum sulfate. 相似文献
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聚合硅酸氯化铝的研制 总被引:3,自引:0,他引:3
应用硅酸钠、氯化铝在一定条件下制成聚硅酸氯化铝 ( PASC)絮凝剂 ,并对其稳定性 ,Si O2 百分含量 ,Al/Si摩尔比等进行了研究 ,得出影响 PASC稳定性的主要因素有二 :一是溶液中的 Si O2 浓度 ,当 Si O2 的浓度在1 %左右时 ,溶液的凝胶时间在 3 0 d以上 ,而当 Si O2 浓度在 3 .0 %时 ,其絮凝时间仅为 1 0 d;二是 Al/Si摩尔比 ,最佳摩尔比约为 1 .5。对制得的 PASC进行了处理污水 (浑浊水、剩余氨水 )的条件实验 ,得出聚硅酸氯化铝对剩余氨水中 COD的去除率可达 94.1 % ,对氨氮的去除率达 93 .8% (二次絮凝 )。 PASC处理废水的适宜操作参数为 :投加量 1 3× 1 0 - 6 ,p H值为 6~ 7,高速搅拌 ( 1 3 0 0 r/min) 2 min,低速搅拌 ( 60 r/min) 1 0 min,静置沉淀 3 0 min~ 60 min。 相似文献
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复合纤维素固定化脲酶对铜离子的吸附作用 总被引:1,自引:0,他引:1
脲酶对重金属离子极为敏感。由复合纤维素(CC)固定化脲酸对铜离子的吸附现象得出的结论是:脲酶吸附的Cu~(2+)总量与其活性没有定量关系,而是与固酶重量成比例。从而可以认为,重金属离子不是直接作用于脲酶活性部位使其中毒的,很可能是作用于脲酶大分子其他部位,使分子构象变形后导致脲酶失活的。由于CC固酶对Cu~(2+)有吸附作用,且又不污染系统,所以可用其除去食品、药物及水中的Cu~(2+)离子。 相似文献
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A. M. Kosevich V. L. Galkin M. L. Polyakov 《International journal of quantum chemistry》1979,16(3):623-629
Thermodynamics of the melting of a DNA-type macromolecule is studied theoretically. Elements of the macromolecule are able to annex a low-molecular impurity from the solvent (e.g., metal ions). Two models of the annexing of the impurity to the macromolecule are analyzed. It is shown that the concentration dependence of the helix-coil phase transition temperature is describable by a non-monotonic function in the case of certain relations between parameters. 相似文献
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改性羽毛对锌离子的吸附 总被引:1,自引:0,他引:1
使用单宁酸对禽类羽毛进行化学改性.研究了改性前后羽毛对金属锌离子的吸附及解吸性能,探讨了羽毛上单宁酸负载量,锌盐溶液的pH值等因素对羽毛金属离子吸附性能的影响.结果表明,经单宁酸化学改性的羽毛在碱性环境下能明显增加对金属锌离子的吸附,此时对应Zn2 的最大吸附量为O.97mmol/g,而未改性羽毛在相同条件下的最大吸附量为0.64mmol/g.在酸性环境中,改性羽毛中金属锌离子的解吸附率为16.8%,未改性羽毛的锌离子解吸附率为64.0%,表明改性羽毛的金属复合物具有较高的稳定性.羽毛作为一种廉价的重金属吸附材料,对整治环境污染具有应用前景. 相似文献
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化学吸附纤维制备、性能及应用研究进展 总被引:20,自引:0,他引:20
综述了20年来作者对化学吸附纤维(离子交换、螯合)制备、性能及应用研究结果.包括已发表的文章、未全丈发表的会议报告及尚未发表的研究结果.化学吸附纤维制备研究:基体纤维有聚丙烯、聚丙烯腈、聚氯乙烯、聚乙烯醇纤维,采用方法有辐射引发、化学引发、大分子化学转化,研制了强酸、弱酸性阳离子交换纤维;强碱、弱碱性阴离子交换纤维、螯合纤维.应用研究:对金、铀、重金属等离子的吸附和分离;在填充床电渗析中的应用、吸附气体中H2S、CO2、NH3、HCl、SO2,以及CO2、H2S的分离;废水处理等. 相似文献
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A. A. Dulov L. A. Abramova I. M. Shcherbakova A. I. Sherle 《Polymer Science Series A》2006,48(4):395-400
It was shown that the presence of a metal in a macromolecule affects the electric conductivity of oligo-and polyphthalocyanines. A change in the electric conductivity related to introduction of the metal does not exceed two orders of magnitude and depends on the nature, concentration, and location of the metal in the macromolecule (in the window of the azaporphine ring or in the outer sphere). This change does not mask the dependence of electric conductivity on the length of conjugation regions in macromolecules that was established for metal-free products. It was demonstrated that the electric conductivity drops upon incorporation of urea fragments into the molecular structure of polyazaporphine owing to violation of the continuous conjugation chain. The role of end groups of macromolecules in the appearance of barriers to intermolecular electronic transport in the electrical conduction process was revealed. 相似文献
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Macromolecule metal complexes (MMCs) — the combination between a macromolecule, a metal chelate/complex/ion or cluster — are dominating factors for different functions in living systems, and are becoming more and more important in different sciences and applications as artifical synthesized systems. 相似文献