Safety evaluation: Important safeguard of work safety for enterprises in China

This paper mainly reviews on safety evaluation in China in recent years, explains the role of safety evaluation playing in work safety and introduces the progress of safety evaluation made in industries. Also it introduces some important provisions on Safety Evaluation Agencies (SEA), and the evaluation specifications and standards, on which the safety evaluation is carried out, issued by China government. Furthermore, it analyzes the incompletes in safety evaluation and discusses their possible influence on SEA, local administration of work safety and the public's reorganization, and indicates the key points to be developed in China future safety evaluation.     

非饱和渗流作用下云阳西城滑坡稳定性分析

基于非饱和土理论采用有限元法模拟了云阳西城滑坡在雨水入渗和库水位下降过程中暂态渗流场的变化,然后将计算得到的暂态孔隙水压力分布用于滑坡稳定性的极限平衡分析。同时,采用延伸的摩尔—库伦破坏准则以便考虑基质吸力对抗剪强度的贡献,计算了暴雨工况和库水位下降工况下的稳定性系数。研究结果表明:降雨引起的暂态渗流场对滑坡稳定性有明显的影响;考虑基质吸力对抗剪强度的贡献,会明显提高滑坡稳定性;由于该滑坡渗透系数较大,库水位下降引起的暂态渗流场对该滑坡稳定性系数的影响不如降雨引起暂态渗流场的明显;该滑坡主要受暴雨影响。     

Naval derusting wastewater containing high concentration of iron, treated in UV photo-Fenton-like oxidation

The UV photooxidation with Fe(III) and H2O2 was employed to treat a naval derusting wastewater, which contains the high COD (chemical oxygen demand) and various metal concentrations exceptionally with high concentrations of citric acid and iron. Because of its iron containment, the Fenton-like reaction automatically took place with the added amount of H2O2. The decomposition rate was found in a sequence of: UV/H2O2/Fe(III) > UV/H2O2 > Fe(II)/H2O2. Two H2O2 injection methods, single and multiple points, were evaluated. The multiple-point H2O2 injection was more e cient to decompose the citric acid. The decomposition of the synthetic citric acid and the real derusting citric acid wastewater was also compared. The 93% COD reduction of the derusting wastewater was achieved using the UV/H2O2/Fe(III) treatment.     

城中村生态改造指标设计

城中村改造作为生态城市建设的重要组成部分和建设生态住区的重要途径,进行生态化改造是今后的发展方向。从生态城市建设的基础理论入手,阐述了生态城市建设的基本内涵,并与之对应,从可行性、社会性、经济性、环境性4个方面,设计了城中村生态改造指标,以指导实践,促进生态城市建设。     

石油化工企业消防站设置的有关问题浅析

GB50160-2008<石油化工企业设计防火规范>已经颁布实施,其中对石油化工企业消防站部分的有关内容进行了修编,但仍有一些内容难以操作,通过对有关问题的调查分析,探讨解决问题的方法.     

PBT树脂生产过程中主要危险有害因素分析及对策

分析了PBT树脂生产过程中的主要危险有害因素有火灾爆炸、机械伤害、中毒及灼烫等,提出了相应的预防对策。     

Polychlorinated biphenyls in the atmosphere of Taizhou, a major e-waste dismantling area in China

PM2.5,total suspended particles(TSP) and gas phase samples were collected at two sites of Taizhou,a major e-waste dismantling area in China.Concentrations,seasonal variations,congener profiles,gas-particle partitioning and size distribution of the atmospheric polychlorinated biphenyls(PCBs) were studied to assess the current state of atmospheric PCBs after the phase out of massive historical dismantling of PCBs containing e-wastes.The average 38PCBs concentration in the ambient air(TSP plus gas phase) near the e-waste dismantling area was(12,407 ± 9592) pg/m3 in winter,which was substantially lower than that found one decade ago.However,the atmospheric PCBs level near the e-waste dismantling area was 54 times of the reference urban site,indicating that the impact of the historical dismantling of PCBs containing e-wastes was still significant.Tri-Penta-CBs were dominant homologues,consisting with their dominant global production.Size distribution of particle-bound PCBs showed that higher chlorinated CBs tended to partition more to the fine particles,facilitating its long range air transportation.     

广州市工业结构与环境污染物的灰色关联分析

文章根据2003年-2007年广州市各种工业结构企业工业总产值以及工业三废排放量等数据,运用灰色关联分析方法研究了广州市工业生产规模结构、轻重工业结构、行业结构与环境污染物之间的关联程度。结果表明：①广州市三种生产规模的企业中与工业三废关联最大的是小型企业,其次是中型企业,大型企业最小;②相对重工业,广州市轻工业与工业三废的关联较大;③广州工业主导行业与工业三废的关联度排序：纺织业〉石化工业〉电子产品制造业〉食品工业〉机械制造工业〉冶金工业〉电力燃气及水的生产供应业。     

啤酒企业环境污染节点识别及分析

在企业内部推行节能减排、实施清洁生产不仅是企业自身生存和发展的需要,而且也是减轻环境污染,实现经济、社会与环境协调发展的重要举措。对整个企业进行物料衡算和污染节点识别分析是实施清洁生产的基础和前提条件。通过等标污染负荷法,结合各个排水单元的水质和水量。比较了糖化洗锅、发酵洗罐、洗瓶车间和巴氏灭菌四个节点的等标污染负荷比,分别为42．7％、36．6％、14．8％、5．86％。从水质上说,糖化洗锅的废水是重要的污染节点,但是发酵洗罐、洗瓶车间和巴氏灭菌三个节点排水水质较好、水量较大,有很大的节水潜能,是实施清洁生产节水减排的主要突破口。     

关于环保信息系统分级建设

本文归纳了多年来环保信息系统建设的四种模式,并对它们的特点、适用条件及优劣比对作了论述。