浸出毒性鉴别重金属分析中存在的问题

浸出毒性鉴别是判定危险废物的依据之一,在固体废物管理中具有极重要的意义。但实际浸出毒性鉴别分析工作尚属于起步阶段,还存在诸多问题和难点,需要从各方面加强固体废物浸出毒性鉴别技术方面的研究,不断完善鉴别能力,使浸出毒性鉴别结果更加准确可靠。     

欧美工业事故防护服标准体系

国外防护装备涵盖了非消防人员配备的事故防护装备,主要用于现场应急处理时配备使用。工业事故类防护服标准体系包括产品标准与相应的检测检验方法标准,对工业事故类防护服提出了特殊的性能要求与检测评估方法。了解国外工业事故类防护服标准体系,有助于我国工业事故应急防护领域的发展。     

Leachability of dissolved chromium in asphalt and concrete surfacing materials

Leachate metal pollutant concentrations produced from different asphalt and concrete pavement surfacing materials were measured under controlled laboratory conditions. The results showed that, in general, the concentrations of most metal pollutants were below the reporting limits. However, dissolved chromium was detected in leachate from concrete (but not asphalt) specimens and more strongly in the early-time leachate samples. As the leaching continued, the concentration of Cr decreased to below or close to the reporting limit. The source of the chromium in concrete pavement was found to be cement. The concentration of total Cr produced from leachate of different cement coming from different sources that was purchased from retail distributors ranged from 124 to 641 μg/L. This result indicates that the potential leachability of dissolved Cr from concrete pavement materials can be reduced through source control. The results also showed that the leachability of dissolved Cr in hardened pavement materials was substantially reduced. For example, the concentration of dissolved Cr measured in actual highway runoff was found to be much lower than the Cr concentration produced from leachate of both open and dense graded concrete pavement specimens under controlled laboratory study. It was concluded that pavement materials are not the source of pollutants of concern in roadway runoff; rather most pollutants in roadway surface runoff are generated from other road-use or land-use sources, or from (wet or dry) atmospheric deposition.     

中国与世界银行对新建火电厂的环保要求对比分析

详细介绍了中国和世界银行对新建火电厂的不同环保要求,比较分析了电厂污染物排放中的大气（颗粒物、二氧化硫、氮氧化物）、工业废水和噪声的排放限值,对规划、新建火电厂的主要污染物控制具有参考意义。     

扬中市第二污水处理厂一期工程工艺设计

扬中市第二污水处理厂,一期工程设计规模为1．0×10^4m^3／d,主体采用厌氧水解＋改良SBR工艺,处理出水达到《城镇污水处理厂污染物排放标准〉（GB18918--2002）国家一级B类标准。文中主要介绍了该工程设计的工艺流程、构筑物组成和设计参数,总结分析了改良SBR工艺的技术特点和设计要点。     

国内外工业源颗粒物无组织排放控制标准研究

工业企业颗粒物无组织排放是环境空气中颗粒物的主要来源之一。长期以来,由于我国工业生产粗放型发展,环境管理不够精细,企业重视程度不够,从而导致颗粒物无组织排放问题越发突出,严重影响了我国大气环境质量的根本改善。工业源颗粒物无组织排放控制标准是我国大气污染物排放标准体系的重要组成部分,亦是颗粒物无组织排放管理和执法监管的重要技术依据。了解国内外当前工业源颗粒物无组织排放控制标准的发展现状、体系特点及存在的问题,有助于科学指导我国工业源颗粒物无组织排放控制标准的制定。本文系统研究了中国、美国、德国和日本的工业源颗粒物无组织排放控制法规及标准,通过对比分析,指出了我国工业源颗粒物无组织排放控制标准存在的问题,并提出完善标准的建议,为优化我国现行大气污染物排放标准体系、深化颗粒物污染防治和管理提供参考依据。     

An examination of the efficacy of the precautionary principle as a robust environmental planning and management protocol

The precautionary principle is regularly cited in cases that involve development in eco-sensitive locations. We investigated whether the precautionary principle provides the basis for a coherent framework to prevent environmental harm, and does it work in practice? We suggest that, in principle, the precautionary principle makes good sense. In practice, however, it is imprecise in policy and law and fails to fulfil its promise because it is loosely defined and thus lacks substance and clarity. Consequently, it operates in a framework that is ambiguous, leaving it open to manipulation by discretionary powers. To counter such deficiencies, human-induced environmental harm should be formally observed as ‘criminogenic’ and environmental protection prioritised against which other competing priorities (e.g., ‘year on year’ economic growth) are measured. This would overcome the politico-legal obfuscation and contestations of climate change policy that currently impedes the precautionary principle's practical application.     

浅析环保产品认证对环保产品标准的宣贯作用

简介了目前我国环保产品标准的施行现状,以及环保产品认证的模式、依据、作用等,结合环保产品认证的三个环节中涉及环保产品标准实施的内容,阐述了全面开展环保产品认证对宣传贯彻环保产品标准的实施起到的积极推动作用。     

标准溶液直读法标定电导电极常数的探讨

目前电导率测定在实验室是一个十分普遍而重要的项目,标定电极常数的方法有直接测定法和比较测定法。在直接测定法的基础上,针对现代数显电导仪的特点,设计了标准溶液直读法标定电极常数,绕过了标定过程中需要测定电导G(电阻)的步骤。该方法直观易懂,操作简单,不需要计算,省时省力,适用于所有需要调节并能读出该电极常数的电导率仪。