印染行业建设项目环境影响评价中清洁生产评价指标的探讨

按照清洁生产评价指标的选取原则，结合印染行业的特点和建设项目的具体情况，对印染行业建设项目环评中清洁生产评价指标进行了探讨，通过实例分析，为该行业建设项目环评中清洁生产评价指标的确定提供参考。     

浅淡在中国第三产业的商业零售业中推进清洁生产

中国在第三产业的商业零售业开展清洁生产具有重大意义。结合北京市商业零售业调研情况,对行业内开展清洁生产进行了全面梳理和分析,简要总结了中国特别是北京市商业零售业清洁生产的现状和问题,并对政府和行业发展提出了一些建设性建议。     

浮法玻璃生产企业清洁生产评价

清洁生产评价是指对企业的生产情况进行综合分析和评估，寻求实行清洁生产审核的机会和途径。作者以浮法玻璃生产企业为例，对清洁生产评价指标的选取、指标等级划分和评分标准以及评价指标权重的确定等作了介绍。     

清洁生产与环境污染防治

清洁生产是保证可持续发展重要措施。本文讨论了清洁生产的概念、内容和其在我国的应用现状，分析了几种重污染行业的清洁生产途径，论述了清洁生产审计在我国厂工业企业中实施的具体方法。     

松脂废液项目环境影响评价中的清洁生产分析

针对尚未颁布清洁生产标准的林产加工行业,以2.00万t/a松脂废液加工项目的环境影响评价为例,从生产工艺和装备要求、资源能源利用指标、产品指标、污染物产生指标和废物回收利用指标等5个方面进行清洁生产水平分析.通过综合指数评价法,确定了项目高纯长叶烯精制、松油醇生产和固体废物综合利用3项指标仍处于国内一般水平,并提出相应...     

基于耦合关系的石化行业清洁生产技术评价方法研究

石化行业中水耗、能耗和污染物排放量之间存在显著的耦合关系,单独考核节水、节能、减污无法准确筛选出最优清洁生产技术.基于水耗、能耗、污染物排放量之间的耦合关系,构建了石化行业清洁生产技术评价方法,共识别出40条存在耦合关系的物质/能量流,筛选出37项适用于石化行业的清洁生产技术,通过环境效益和经济效益进行综合评价.以某综...     

环境影响评价中清洁生产分析要点及方法

概述了清洁生产的内涵,清洁生产的环境影响评价要点,重点列举了清洁生产环境影响评价的各个指标,最后指出了环评中的清洁生产评价方法。     

浅谈电镀清洁生产技术与管理

介绍了电镀行业的清洁生产技术与加强清洁生产管理。通过发展环保技术，从源头削减和技术改造来减少污染物的产生量，不断加强企业清洁生产管理，促进电镀行业实现社会效益、经济效益和环境效益的统一，走可持续发展的道路。     

农业清洁生产环境管理体系探讨

根据农业清洁生产源头控制理念,提出了农业生产源头总量控制和农业环境影响评价两项环境管理制度以及农业清洁生产环境标准体系框架,为制订农业环境政策和农业各行业清洁生产的环境指标体系提供参考.     

造纸企业清洁生产分析与评价实践

从清洁生产的角度,通过对某造纸企业的生产实际,从以原材料、产品、资源消耗和污染物排放为指标的清洁生产全过程进行综合评价,定量分析与评定出企业清洁生产的总体水平及在同行业所处的位置.     

Optimization of Height of Release of Air Pollutants

A number of key projects in the Environmental Protection Agency (EPA) particulate R&;D program having applicability to industry are presented. For electrostatic precipitators (ESP) there is presented the result of work on large diameter discharge electrodes which provide a decrease in penetration of up to a factor of 4 when compared to conventional small diameter electrodes. Also discussed is the multistage ESP which provides a collection efficiency that would require a collecting plate area 4 or 5 times larger with conventional ESP technology. The E-SOX technology makes use of the multistage concept to free up space in the ESP for SO₂ removals of up to 90%. Electrostatically augmented fabric filtration provides a reduction in pressure drop of about 5 0% as compared to conventional fabric filtration. Wind tunnel modeling of windbreaks for material storage piles indicates a potential for providing engineering design data that would allow significant emission reduction caused by wind erosion     

Investigation of the characteristics of the reflectivity of clouds

This paper investigates some of the reflectivity characteristics that clouds (when modelled as solid bodies) must exhibit to be compatible with observations that the reflecting surface of a cloud (i) appears almost equally bright across its face, (ii) is brightest when the cloud is opposite to the Sun but decreases in brightness as the cloud moves to other positions and (iii) increases in brightness with increasing optical thickness of the cloud in the observer's line of sight. These observations, respectively, are shown to imply that the peak value of the bidirectional total reflectivity from a cloud surface (i) increases in inverse proportion to the cosine of the angle between the Sun and the normal to the cloud surface, as the incident angle increases, (ii) appears to be directed back in the direction of the incident radiation, and (iii) increases as optical thickness of the cloud in the observer's line of sight increases. The results could have application in many fields (e.g. modelling diffuse radiance distributions for cloudy skies).     

实验室质量管理体系内部审核的实施

在实施ISO／IEC17025：1999标准《检测和校准实验室能力的通用要求》过程中，通过实验室质量管理体系内部审核的实践与系统分析，识别出内部审核实施阶段的关键环节，提出召开首次会议、收集审核证据、确定审核发现和召开末次会议的技术方法，对提高内部审核的质量和有效性、获得可靠的审核结论具有重要意义。     

Estimation of uncertainty of sampling for analysis of pesticide residues

Abstract

A computer model was used to take random samples from primary sample populations obtained from field trials to simulate the uncertainty of sampling for residue analysis of plant commodities and soil. The results indicate about 40%, 30% and 20% relative uncertainty when random samples of size 5, 10 and 25 are taken respectively, from a single lot. Therefore the sample size should be the same for establishing and enforcing legal limits.     

扬中生态环境建设的思考与实践

结合扬中生态环境的基本情况和存在的不足，进行了具体分析，对扬中未来生态建设的发展方向提出了建议及实施措施。     

An application of the theory of kinematics of mixing to the study of tropospheric dispersion

The most common technique used for numerical simulations of tracer mixing is that of the numerical solution of the advection–diffusion equation with the unresolved fluxes parameterized using the similarity theory. Despite correct predictions of the overall directions of transport, models based on a numerical solution of the advection–diffusion equation lack sufficient accuracy to correctly reproduce the coupling of mixing with small scale processes which are sensitive to the microstructure of the tracer distribution. The objective of this paper is to revisit the basic formalism employed in numerical models used to investigate atmospheric tracers. The main mathematical method proposed here is the theory of kinematics of mixing which could be applied effectively for simulations of atmospheric transport processes. At the beginning of the paper, we introduce simple mathematical transformations in order to demonstrate how complex topological structures are created by mixing processes. These idealistic flow systems are essential to explain transport properties of much more complex three-dimensional geophysical flows. An example of the application of the kinematics of mixing to the analysis of tracer transport on a planetary scale is presented in the following sections. The complex filamentary structures simulated in the numerical experiment are evaluated using some commonly applied statistical measures in order to compare the results with the data published in the literature. The results of the experiment are also analysed with the help of simple conceptual models of fluid filaments. The microstructure of the tracer distribution introduced in the paper is essential to increase our understanding of atmospheric transport and to develop more realistic parameterizations of small-scale mixing. The presented results could also be used to improve calculations of the coupling between microphysical processes and tracer mixing.     

次氯酸钠发生器的研制

介绍了电解法生产次氯酸钠的原理 ,并在原有生产工艺的基础上进行了重新设计和对设备的重新选择、改造 ,得出了各个工艺参数的最佳值 ,生产出高品质的次氯酸钠     

Comparison of methods for evaluation of activity of photocatalytic films

Objective

This work aims to investigate the correlation between the photocatalytic activity determined by methylene blue bleaching (DIN 52980), stearic acid degradation, and degradation of acetone in gas phase.

Method

The photocatalytic TiO₂ coatings included in this investigation ranged from thin commercially available coatings (Activ^TM and BioClean^TM) and ready to use suspensions (Nano-X PK1245) to lab-produced PVD and sol?Cgel coatings. XRD analysis of the photocatalytic coatings showed that all the coatings consisted of nanocrystalline anatase, although the thickness and porosity varied considerably.

Results

The study showed that the reproducibility of the activity measurements was good. However, more importantly, the investigation showed that there is a good correlation between the activities determined by the different methods even though the characteristics of the photocatalytic coatings and the organic probe molecules varied considerably.

Conclusion

The overall findings of this work suggest that there is a good correlation between the investigated methods. These results are promising for the future work concerning standardization of methods for determination of the activity of photocatalytic films.     

Impact of overexploitation of shellfish: northeastern coast of India

India has a very extensive coastline of about 7515 km, rich in diverse living resources. These resources continue to deteriorate with rampant harvesting or are altered for other uses such as aquaculture and fisheries. The present paper deals with degrading coastal habitats in northeastern India, and projects the intensity of the stress arising from the collection of tiger prawn seeds (Penaeus monodon) for aquacultural farms and molluskan shells for poultry feed and edible lime. Indiscriminate exploitation of these resources leads to a heavy reduction of the species concerned and other associated marine communities. The magnitude of such destruction has been quantified. The impacts of biodiversity loss and their after-effects on the ecobalance of this coastal system have become a matter of great concern to ecologists to maintain security and sustainability. The authors propose a public awareness program on themes relating to the importance of biodiversity for human livelihoods.