生物硫铁复合材料对铜暴露斑马鱼的保护研究

为了研究生物硫铁应用于铜污染事故应急处理中保护鱼类免于死亡的可行性,以斑马鱼为受试对象,测定了铜对斑马鱼的各时间半致死浓度(LC_(50)),考察了投加量、投加时间、pH环境等条件对铜暴露中斑马鱼死亡率的影响。结果表明:投加量越大斑马鱼死亡率越低,最佳投加量(硫化物与铜离子摩尔比)为1∶1,此时斑马鱼96 h死亡率由对照组(不投加生物硫铁材料)的83%降低至0%;在(24 h-LC_(50))mg/L浓度下12 h内投加生物硫铁的斑马鱼死亡率都明显低于对照组,超过24 h则与对照基本一致;水体初始p H对生物硫铁的投加有影响,p H为8时生物硫铁对铜暴露斑马鱼的保护效果较好,在(48 h-LC_(50))mg/L浓度下pH5投加组和p H 8投加组的斑马鱼96 h死亡率分别由100%和77%降低至50%和0%。研究表明,生物硫铁复合材料能快速降低水中铜离子浓度,从而保护鱼类免受毒害,其在铜污染事故应急处理中具有较好的应用前景。     

当环保动了你的奶酪

正当许多媒体为公众在圆明园防渗、华南虎照、厦门PX等事件中所表现出来的环保意识和参与热情欢呼、大加赞美之时,一纸“有偿使用塑料袋”的通知,却又让人大跌眼镜。     

科技进步促进环境保护

在我国，科技成果转化率低下严重制约着污染防治水平的提高，落后的生产方式造成资源浪费，环境污染、依据科技力量，选择先进的环保技术，建立环保产业及环保市场，改革现有的环境管理制度，从经验管理向科技管理转化，是实现可持续发展战略的必由之路。     

Experimental study on the simultaneous desulfurization and denitrification by duct injection

The highly active absorbent with oxidization based on fly ash, lime and additive was prepared.Experiments of simultaneous desulfurization and denitrification were carried out using fixture bed and duct injection.The influencial factors for the absorptive capacity of the absorbent were studied. The absorptive capacities of 120.7 mg for SO2 and 43.7 mg for NOx were achieved at a Ca/(S N) molar ratio 1.2, respectively, corresponding removal efficiencies of 87% and 76%, while spent absorbent appeared in the form of dry powder. The optimal temperature and humidity of flue gas treated with this process were shown to be approximately 50℃, and 5% respectively. The mechanism of removal for SO2 and NOx was investigated. In comparison with traditional dry FGD,this process appears to have lower cost, less complicated configuration and simpler disposal of used absorbent. The valuable references can be provided for industrial application by this process. The foreground of application will be vast in China and in the world.     

利用洗脸盆的排水保护地漏存水弯水封

简要介绍了我国地漏的现状与问题,并结合SARS病毒在香港淘大花园传播的原因,说明了地漏安全问题的严重性。根据香港城市大学的实验,提出了利用洗脸盆排水保护地漏存水弯水封,从而解决地漏的安全问题。     

论行政首长环境保护目标责任制

行政首长环保目标责任制与其它制度相比，具有显效性、契约性和自费性的特点。科学制订环保目标责任书，要遵循科学性原则、定量化原则、先进性可行性原则、均衡性原则和民主性原则，实施中要合理分解目标，严格考核，奖惩兑现。     

积极运用财政金融政策,促进环保产业的快速发展

环保产业是人类社会进步的文明成果,也是经济可持续发展的重要物质保障,随着经济建设与环境保护事业的发展．环保产业现已成为全球性的一种特殊产业．本文论述了我国的环保产业的特点及制约环保产业发展的因素,提出加快环保产业发展必需解决的财政金融对策。     

应用AERMOD计算卫生防护距离方法探讨

针对目前环评工作中计算确定工业企业卫生防护距离几种常见方法的不足和局限性,本文提出应用美国环保局推出的第二代法规模式AERMOD模型计算卫生防护距离的方法,并比较三种计算方法的优劣,提出确定工业企业卫生防护距离的最终可行方案。     

环境保护支撑供给侧改革的建议

供给侧改革既需要生态环境保护的支撑,对生态环保工作提出了新的要求,也为生态环境质量改善带来重要机遇。环境保护支撑供给侧改革,既要通过强化环保约束、严格环境准入,除掉落后产能,也要通过深化治理、创新驱动,引导资本流向绿色产业,扩大生态产品供给。因此,可以从资本、技术、制度等供给侧要素改革入手,全面融入环境保护的要求,促进经济发展更加有质量、可持续。本文从政府、市场、企业、公众等利益相关主体入手,提出环境保护支撑供给侧改革,从而实现环境质量改善、经济可持续发展的政策建议。     

Antenatal diagnosis of a congenital nasolacrimal duct cyst by ultrasonography: A case report

With proximal and distal obstruction to the lacrimal drainage system, mucus accumulates forming a cyst. In order to diagnose a nasolacrimal duct cyst antenatally, the sonographer must image the region adjacent to the orbits.     

Sheltering effectiveness against plutonium provided by buildings

Air exchange rates for residences and office buildings under sheltering conditions only, that is, with doors and windows closed and fans off, are selected from the literature and correlated with wind speed and indoor-outdoor temperature difference. These exchange rates are found to be substantially less than those used previously in calculating the protection offered by sheltering.Graphed values of the ratio of interior:outside, time-integrated concentrations (the Dose Reduction Factor, DRF) are presented as a function of time. These apply to both gases and particulates. Especially for plumes of short duration, the resultant DRFs make sheltering a highly competitive protective action against the inhalation pathway. The inhalation DRFs are the most favorable for depositing materials. Example DRFs are calculated and graphed for 2 μm aerodynamic diameter particles, as representing respirable plutonium (Pu).