总局开展整治违法排污企业专项行动

据2007年全国环保厅局长会议，在“十一五”期间，国家环保总局将针对一些重污染行业结构性污染突出的问题，围绕解决影响人民群众健康和可持续发展方面突出问题的总体要求，区别轻重缓急，每年开展1～2个重点行业的专项整治。2007年开展涉铅污染企业和造纸企业环境违法问题的专项整治。     

我国节能减排形势依然严峻

国家发改委日前公布的第一季度经济运行情况显示，今年以来，我国结构调整和节能降耗积极推进，但节能减排形势依然严峻。     

行业协会联合推介秸秆利用变废为宝

2007年8月16日，中国环境保护产业协会、中国轻工业联合会、中国石油和化学工业协会联合主办的“秸秆综合利用新技术推介会”在北京钓鱼台国宾馆隆重举行。有关政府和行业协会领导、相关科研院所专家、经销商代表、用户代表以及国内外众多新闻媒体记者130余人参加了推介会。     

印度安防行业概览

印度安防市场正在经历一个萌芽的变化，就是公众开始认识到安全消费可以降低因盗窃，暴乱和恐怖主义带来的损失。[编者按]     

我国废气污染物防治技术发展概述

本文介绍了目前我国的废气污染物种类及防治技术装备水平；分析了国内废气污染物防治技术的发展情况。     

关于对安全生产隐患排查治理专项行动进行检查督查的指导意见

为促进各地、各相关部门做好安全生产隐患检查督查和自查工作,指导、督促重点行业和领域生产经营单位认真开展安全生产隐患排查治理专项行动,根据《省政府办公厅关于印发福建省重点行业和领域开展安全生产隐患排查治理专项行动方案的通知》(闽办发明电[2007]号)要求,现就各地、各相关部门开展安全生产隐患排查治理专项行动检查督查工作提出如下指导意见:     

Reproduction and biochemical responses in Enchytraeus albidus (Oligochaeta) to zinc or cadmium exposures

To better understand chemical modes of action, emphasis has been given to stress responses at lower levels of biological organization. Cholinesterases and antioxidant defenses are among the most used biomarkers due to their crucial role in the neurocholinergic transmission and in cell homeostasis preventing DNA damage, enzymatic inactivation and lipid peroxidation. The main goal of this study was to investigate the effects of zinc and cadmium on survival and reproduction of E. albidus and to assess metals oxidative stress potential and neurotoxic effects at concentrations that affected reproduction. Both metals affected the enchytraeids’ survival and reproduction and induced significant changes in the antioxidant defenses as well as increased lipid peroxidation, indicating oxidative damage. This study demonstrates that determining effects at different levels of biological organization can give better information on the physiological responses of enchytraeids in metal contamination events and further unravel the mechanistic processes dealing with metal stress.     

Locating pollutant emission sources with optical remote sensing measurements and an improved one-dimensional radial plume mapping technique

Previous studies have shown that there was a relatively large amount of uncertainty along the major wind direction in the results of locating emission sources using the one-dimensional radial plume mapping (RPM(1D)) technique based on optical remote sensing measurements. This paper proposes setting up an additional monitoring line that is perpendicular to the original scanning beam geometry to reduce this uncertainty. We first conducted a computer simulation study using the Gaussian dispersion model to generate the downwind concentrations of plumes from 400 source locations in a 201 m × 201 m spatial domain under various wind directions (n = 181). The optical remote sensing instrument was assumed to be at (0, 0) with two perpendicular monitoring lines, each of which had three beam segments of equal length. Each pair of the reconstructed downwind concentration profiles was then used to trace back to the source locations. The results showed that the accuracy of the method and its uncertainty were improved by using the proposed two-line RPM(1D) approach rather than the original one-line RPM(1D) approach at most simulated source locations. In a follow-up field experiment, a tracer gas was released at the coordinate of (100, 100). The release location was covered within the 0.25- to 0.5-probability area of the estimated results, and the distance between the actual and estimated source locations was 18.4 m (9.2% of the longest beam path).