共查询到20条相似文献,搜索用时 593 毫秒
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本项目是在工业应用的三维电极反应器基础上,利用电激发羟基自由基的强氧化性来处理氰化物,将其氧化分解为二氧化碳和氮氧化合物。反应器使用石墨板作为阴阳电极,颗粒活性炭填充在石墨电极间作为粒子电极,采用直流电源进行供电。试验数据表明,采用两级三维电极激发羟基自由基处理电镀含氰废水,每级反应时间为30 min,总体去除率高达90%以上。处理含氰化物100 mg/L以上的电镀含氰废水,对比传统的碱式氯化法,具有明显的经济优势,运行费用节省了50%以上。 相似文献
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文章介绍了电镀废水中有机物的来源、特点和处理难点,分析了微电解法处理电镀废水有机物的优势,并通过实验研究了微电解法处理电镀废水有机物的最佳参数和处理效果。 相似文献
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焦炭—铁屑法处理含铬废水 总被引:1,自引:0,他引:1
一、前言使用铁屑法处理电镀含铬废水及重金属混合废水,目前国内外报道很多。我们根据电化学腐蚀的原理,研究成功焦炭—铁屑法处理电镀含铬废水工艺及其有关设备。此类设备在一些厂家运行已经四年多。实验证明,此种工艺改进了铁屑处理法,加速了处理速度,降低了处理费用,适合于中、小型电镀车间使用。二、基本原理的探讨焦炭—铁屑法处理含铬废水,是利用铁的标准电极电位比较负[φFe~(2+)/Fe=-0.44V],化学活性强,在酸性溶液中能被氧化剂氧化为Fe~(3+)离子,当pH=2时,含铬废水通过焦炭铁屑层后,能使六价铬还原成三价铬、而在pH=7-9时,又能产 相似文献
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采用膜处理与活性炭吸附技术处理电镀废水的达标排放水,并回用于生产工序中。长期运行结果表明:色度≤10、CODc,≤40mg/L、pH=6-9、浊度≤1NTU、污染指数(SDI≤5、余氯≤0.1mg/L、总铁≤0.25mg/L,出水水质稳定达刭该企业生产甩水标准需求,并创造了良好的经济效益与社会效益。 相似文献
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造纸工业是我国水资源消耗大户,造纸废水水量大、有机物含量高、造成的环境污染影响大,对造纸废水治理在全世界范围内都在关注废水回用,提高水循环利用率,减少水资源消耗和废水排放污染。膜分离技术是在一定压力下进行混合液分离的技术,近年来膜分离技术快速发展,在海水淡化、化工、食晶、医药、电子等工业废水处理中应用较多,本文对膜分离技术在国内外造纸工业废水回用中的应用研究进行了介绍,并对膜分离技术在造纸工业废水回用的研究方向进行了论述。 相似文献
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Electrochemical etching enables processing with an atomic-level accuracy, without deteriorating the physical properties of the workpiece; however, contamination of its surface with electrolytes is unavoidable. If it is possible to carry out electrochemical etching without using electrolytes, such a process will be applicable to electronic device manufacturing and precision nanoscale processing of semiconductor materials. In addition, this process does not require the use of chemicals, cleaning after processing or disposal of waste fluid, which results in a low-cost and environmentally friendly process. To develop an electrochemical etching process that does not require the use of electrolytes, we proposed a method in which a functional-group-modified electrode is used as the cathode. A carboxylated graphite electrode was prepared by treating a graphite electrode with sulfuric acid. Electrolysis of ultrapure water was carried out using the obtained electrode as a cathode. The results indicate that the electrolysis current obtained using the modified electrode is approximately six-fold that obtained using an unmodified electrode. Furthermore, we can etch a Cu surface conically in ultrapure water. The current efficiency increases by 70% at maximum, and the minimum current required for electrochemical etching decreases compared with that in the case of using an unmodified electrode. 相似文献
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Shigeru Itoi 《Desalination》1979,28(3):193-205
Electrodialysis is applied for treatment of effluents from washing after galvanization, and specifically from washing after nickel galvanization. This method is useful for recovery of galvanization reagents used in various processes. Electrodialysis seems to be applicable for treatment of effluents from washing after cyanide galvanization or galvanization with other substances.For the purpose of establishing a closed system for the effluents discharged during the treatment processes for metallic surfaces, techniques for industrialization of electrodialysis have been developed not only for the recovery of useful components, but also for recycled use of water. Industrialization of electrodialysis is expected in the near future. In order to establish these techniques, technical development is needed not only in ion-exchange membranes and electrodialyzers, but also in systematized processes, including all related techniques such as pretreatments. 相似文献
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以钠基膨润土为原料,制备了铁硅交联土、铁硅有机复合土,以CODCr的去除率为指标,对原土、铁硅交联土、铁硅有机复合土进行了筛选,结果表明:铁硅有机复合土对CODCr的去除率明显好于铁硅交联土和原土;将铁硅有机复合土应用于造纸废水,探讨了其用量、废水PH值、搅拌时间等对CODCr去除率的影响,通过正交实验确定了最佳条件,并在此条件下考察了其对废水CODCr、色度、浊度的去除率,结果表明:以上指标分别可达到87.69%、98.00%、98.18%;最后对铁硅改性膨润土对废水有机污染物的吸附机理进行了探讨。 相似文献
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电解法在处理生活污水中有着重要作用,其中三维电极法效果尤其显著.本文对废旧泡沫塑料在采用电解处理生活污水中的吸附作用进行探讨,并以其良好的反应效果说明能在三维电极处理生活污水中得以应用,实现变废为宝. 相似文献