空气过滤技术研究综述

文章分别从空气过滤材料、空气过滤器、空气过滤理论及空气过滤技术的应用等四个方面,对空气过滤技术进行了详细阐述.总结了空气过滤材料、空气过滤器的分类及研究进展、空气过滤器的过滤机理及过滤理论的发展.介绍了空气过滤技术的主要应用,并指出了空气过滤技术的发展动向和市场趋势.     

浅析电子废弃物回收利用及危害解决办法

随着高科技的发展和人们需求的增长,电子产品不断推陈出新,电子废弃物成为世界上数量增长最快的垃圾."电子垃圾",主要包括各种使用后废弃的电脑、通信设备、电视机、电冰箱、洗衣机等电子电器产品.电子废弃物不规范回收处理易造成污染.电子废弃物中含有很多可回收再利用的有色金属、黑色金属、玻璃等物质.严格意义上讲,这些电子废弃物,不应称其为电子垃圾,而应称作电子旧货.伴随着电子工业的高速发展,电子废弃物污染不可避免地摆在了我们面前.电子废弃物具有危害性和可利用性.     

基于超声空化原理的废旧线缆回收方法

废旧线缆是一种可以回收利用的资源。目前普遍使用机械破碎方法回收废旧线缆,具体工艺是采用机械磨削的方法分离铜和绝缘皮,然后用筛分法获得。由于此工艺中包含有磨削过程,因此会损失很大一部分铜,从而造成资源浪费。为此,研究使用超声波工艺回收电线,并探讨一些因素对分离率的影响。研究结果表明:利用超声波的空化效应分离电线中的金属和塑料,能有效避免铜的大量损失。当水温为60℃,分离率达到最高值;电线长度与分离率之间基本成反比关系;电线总量的大小对分离率也有一定的影响。     

互相关算法在次声监测数据处理中的应用

次声监测数据处理技术是我国履行全面禁止核试验条约必备技术之一。重点介绍逐次多通道互相关(PMCC)算法原理、处理流程以及与之相关的数据处理系统,并利用典型次声事件进行了实验研究。结果表明PMCC在处理次声监测数据方面具有优异性能。     

浅谈焦化废水的处理

焦化废水是一种典型的含难降解有机污染物的工业废水,除含酚类化合物外,还含有多种芳香烃和杂环类有机物,成分复杂,水量大,对环境污染严重。因此,焦化废水的处理越来越多的受到相关学者及专家的重视。本文首先从焦化废水的来源及特征出发,根据其特殊性,综合阐述了近年来国内外焦化废水的常规处理方法及深度处理方法,为以后焦化废水的处理提供一些思路。     

快速测定法与重铬酸钾法测定污水中化学需氧量的方法比较

重铬酸钾法测定化学需氧量,准确度高,但试剂消耗量大,占用空间大,耗时长,消耗大量的电和水。采用快速测定法后能快速省时、省水、省电、省试剂、省人力且操作简便。通过两种方法的比较,快速测定法的精密度及准确度均能达到国标的要求,并且具有成本低的特点,证明了此方法的可行性。快速测定法特别适用于污水处理等工艺过程控制的监测和测试。     

膜生物反应器处理印染废水的研究进展

印染废水是一种有机物含量高、色度深、生化性差、难降解的工业废水,采用传统的污水处理工艺很难达到排放标准,对新型、高效的处理工艺的研究越来越受到人们的关注.膜生物反应器是一种新型水处理技术,具有传统废水处理工艺所无法比拟的优势,通过膜生物反应器处理后的印染废水,甚至达到了回用水标准,在此基础上对现在研究较多的膜生物反应器的改进技术进行了综述并指出了还有待解决的问题,为将来的发展提供参考和依据.     

Adsorption selectivity of salicylic acid and 5-sulfosalicylic acid onto hypercrosslinked polymeric adsorbents

Both bottle-point and column-feeding experiments involving different solutes and sorbents were carried out to investigate the adsorption selectivity and separation performance of salicylic acid and 5-sulfosalicylic acid. Their adsorption isotherms onto such hypercrosslinked polymeric adsorbents as NDA-100 and NDA-99 could be well described by the Freundlich equations whose characteristics describe extrathermic and favorable adsorption processes. The adsorption towards NDA-100 mainly depended on the π-π interaction, while that towards NDA-99 was extremely influenced by the static-electric interaction. Additionally, the adsorptive capacity of salicylic acid on NDA-99 decreased while it increased on NDA-100 with the presence of 5-sulfosalicylic acid in the adsorptive environment as the competitive component. Comparatively, the adsorption capacity of 5-sulfosalicylic acid decreased on both resins with salicylic acid as the competitive component. In fact, the difference in the interaction between adsorbent and adsorbate resulted in the straight antagonism on the effective adsorption sites on the adsorbent. In conclusion, the adsorption selectivity of salicylic acid onto NDA-100 was obviously larger than that onto NDA-99 with the existence of 5-sulfosalicylic acid in the adsorptive environment. A satisfactory separation and recovery of tested solutes in aqueous phase could be foreseeably achieved by the sequencing adsorption technique involving NDA-100 as well as NDA-99. Translated from Environmental Pollution & Control, 2005, 27(8): 570–574 [译自: 环境污染与防治]     

刍议“绿色”职业服的设计内涵

随着社会经济的发展,企业国际化程度的提高,绿色设计理念的延伸,职业服的种类在不断增加和细分化,其内涵不仅仅是为了满足工作状态下人的机能需求和精神需求,更是已经渗透到了我们生活的方方面面。本文提出了"绿色"职业服的概念以及设计内涵,指出了"绿色"职业服发展与应用的前景,这是对当前"以人为本、全面协调可持续发展的科学发展观"的积极回应。     

Does participative leadership enhance work performance by inducing empowerment or trust? The differential effects on managerial and non‐managerial subordinates

We examined whether participative leadership behavior is associated with improved work performance through a motivational process or an exchange‐based process. Based on data collected from 527 employees from a Fortune 500 company, we found that the link between superiors' participative leadership behaviors and subordinates' task performance and organizational citizenship behavior toward organizations (OCBO) was mediated by psychological empowerment (motivational mediator) for managerial subordinates. Yet, for non‐managerial subordinates such as supporting and front‐line employees, the impact of participative leadership on task performance and OCBO was mediated by trust‐in‐supervisor (exchange‐based mediator). Implications for theories and practices are discussed. Copyright © 2009 John Wiley & Sons, Ltd.