重金属电镀工业废水处理技术探讨

电镀行业是高污染的工业企业之一,电镀废水中含有大量重金属,一旦处理不当就排入自然环境既污染环境,又浪费资源。本文结合实例,重点探讨了重金属电镀工业废水的处理技术,并详细分析了处理效果,为电镀工业废水的处理提供参考。     

膜法在电镀工业废水处理中的应用

电镀废水中含有大量有毒有害重金属,如处理不到位,就直接排入河流中既污染环境,又浪费资源。本文在分析电镀废水特点的基础上,实例分析了双层滤料过滤器、超滤、反渗透、纳滤等膜法工艺处理电镀废水的情况。经处理后,达到了废水回用,实现电镀废水的零排放。     

浅析电镀行业的清洁生产措施

随着科学技术与生产的发展,电镀所涉及的领域越来越广。已经遍及人们生活的各个方面。但是电镀生产污染令人担忧,据统计,我国每年排出约4亿吨重金属废水,5万吨废渣。酸雾3000万立方米。更严重的是,一些重金属,如铅、隔、铬通过土壤吸收后进人庄稼内,人食用后会在人体内造成积累性中毒或致癌。因此电镀行业的清洁生产就成为当务之急,这也符合国家的节能减排政策,符合电镀工业的可持续发展。     

青岛将集中整治电镀工业园污染

电镀企业会产生大量的生产废水，其中主要含有重金属等污染物，对环境危害较大，是一个主要污染行业。为避免和减少这类污染对青岛市水环境的影响，该市环保局昨起在全市启动了对电镀工业的集中整治行动，行动中将对全市电镀工业园园区内点（各电镀企业）、线（污水管网）、面（污水集中处理、固废合法处理、退镀集中管理）全面排查，摸清家底，发现问题及时整改，全面规范电镀工业园环境管理，实现污染物达标排放。     

包装废弃物物质流分析框架及指标的建立

介绍了物质流分析的基本框架和指标,详细论述了传统物质流分析框架和指标用于包装废弃物的物质代谢存在的不足。 对改进传统物质流分析框架和指标使其适用于包装废弃物物质代谢分析的可行性进行了分析,指出了改进需遵循的基本原则,进一步对新框架的模块组成、指标选择及其他说明 3 个方面进行了阐述,并给出了应用实例。 新改进的物质流分析框架和指标能够更清楚表征废弃物进入环境后的具体流量和流向,为定量化描述包装废弃物及固体废弃物物质代谢状况提供了分析模式。     

转让纳米喷镀技术

电镀是造成环境污染最严重的工艺之一，为避免电镀等表面处理工艺引起的有害重金属对环境和对人体的危害，我公司开发成功了纳米镜面喷镀技术，该技术是目前最先进的高科技喷涂技术，     

水产品检测方法及标准物质现状分析

本文描述了我国水产品检测方法及标准物质的研究进展。主要检测水产品中的重金属、抗生素类药物、保鲜剂、激素以及环境中的污染物等。介绍了重金属及各种添加物的来源、限量指标及检测方法。最后总结了国内外与水产品相关的标准物质的研究现状,并对面临的挑战与方向做展望。     

香港开发出新型过滤回收设备

香港特区生产力促进局开发出新型聚合过滤技术回收设备，可以帮助电镀业界减少经营成本和大大降低排放污水中的重金属含量，提升竞争能力。     

电镀废水处理技术突破——膜技术治理电镀废水实现零排放

高分子薄膜分离技术具有低能耗、无相变、无污染,且分离效率、浓缩倍数高等优点,我们利用它成功地开发出电镀废水零排放系统并实现重金属回收再用。该系统采用二级膜分离技术,来实现分离、浓缩电镀器件漂洗水。设计浓缩倍数为100倍,处理流量为500m3/H(r25℃)。被膜分离后的浓缩液经过特殊研制的萃取剂,将浓缩的重金属自动萃取回到电解槽再用。本装置适合各类电镀系统,处理后电镀废水污染物含量优于国家最新《电镀污染物排放标准》GB21900-2008。膜集成技术用于电镀废水资源化不仅不会造成二次污染,而且还回收了废水中的有害重金属,变害为宝,使水资源得到再利用,从而推动我国电镀工业的持续发展。一年多使用证明,本装置不仅由于实现电镀废水处理的零排放和回收再利用重金属取得巨大经济、社会效益,也为在两年过渡期内全国所有电镀企业达标作出应有贡献。     

集中供热中热水循环泵的技改

广东新能源电镀工业园现有六十家电镀企业,原来是用燃煤的蒸汽锅炉进行集中供热,现在为了既能发展电镀产业,确保经济增长,同时又能做到集中管理,以便达到节能减排,减少对环境污染,以及电镀工业园本身的发展需要,该园现在要扩建能容纳200家大小电镀企业的工业园。在通过各项指标的比较后,确定使用整个工业园集中供热,供热站另行定位,原来燃煤锅炉改成燃烧生物质锅炉,原有的60家企业做为一个组团进行供热。     

Estimation of Parameters of Universal Distribution of Moments of Failure of Products

A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling.     

Evaluation of optical properties of highly scattering media by moments of distributions of times of flight of photons

A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue.     

Assessment of intakes of mixtures of radionuclides

Australia has several uranium mines and a large number of mineral sand mines, with associated processing facilities. Exposures resulting from these mining and processing operations usually involve intakes of mixtures of radionuclides. This work describes the development of a suite of first order, linear compartment models, based on the ICRP Publication 66 respiratory tract model, and an analytical solution to the decay equations, for assessing the consequences of such intakes. The computer programs based on these models directly compute excretion, organ retention and organ and whole-body doses for intakes of either single radionuclides or any mixture of radionuclides belonging to the same radioactive decay chain. The intake can be via inhalation, ingestion or injection, and can be acute, chronic or of limited duration. The starting concentration and degree of secular (dis)equilibrium can be specified for each radionuclide. No assumptions need to be made about the relative magnitudes of the radioactive half-lives of the different nuclides.     

Estimation of potentialities of methods of summation of direct measurement errors

Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995.     

卧式金属罐容量的测量结果不确定度

本文根据多年的实践检定经验 ,参照JJF1 0 59- 1 999《测量不确定度评定与表示》以及《测量不确定度表达 1 0讲》 ,对卧式金属罐容量的测量结果不确定度进行了评定。     

盐酸浓度不确定度的评估

通过对盐酸浓度标定的过程分析，找出影响结果的各个分量，进行不确定度的评定，按照计量技术规范给出标准的表示法。     

空压机轴承箱蜗壳温度探头油封改造

由于空压机进气侧轴承箱蜗壳温度探头密封效果不好,使空压机及其后续管道受到油污染。后将温度探头的O形圈密封改为骨架油封,杜绝了轴承箱漏油问题。文章简介空压机的结构和技术参数,详细介绍了骨架油封的制作和优点。