Raising medium function of environmental engineering by using life rubbish to produce carpet turf

Abundant material with low cost was utilized to raise medium function of producing carpet turf by life rubbish. The results showed that the material used could strikingly raise water retentiveness and ventilating of medium. Through the determination of the effect of each growth index of several turfgrass, emergence density, plant height, root growth and individual plant′s net primary production were all positively related to the material′s amount mixed, showing that the mixture of material could promote turfgrass growth, further proving that the material used raised medium function of producing carpet turf by life rubbish and made most use of life rubbish resources. It provided a scientific base is for application of environmental engineering by using life rubbish to produce carpet turf. So the study had both important theoretic meaning and applied value.

Computing environmental life of electronic products based on failure physics

In some situations, the accelerated life test on environmental stress for electronic products is not easily implemented due to various restrictions, and thus engineers are lacking of data of the product life test. Concerning this problem, environmental life of the printed circuit board（PCB） board is calculated by way of physics of failure. Influences of thermal cycle and vibration on PCB and its components are studied. Based on the analysis of force and stress between components and the PCB board in thermal cycle events and vibration events, four life computing models of pins and soldered dots are established. The miller damage ratio is used to calculate the accumulated damage of a pin or a soldered dot, and then the environment life of the PCB board can be determined by the first failed one. Finally, an example is used to illustrate the models and their calculations.

Environmental load of solid wood floor production from larch grown at different planting densities based on a life cycle assessment

As one of the main structural units in a building,a solid wood floor has significant strategic research value for low-carbon energy saving.Taking the production line of a solid larch wood floor as a case study,we assessed the environmental load during production based upon a life cycle assessment.Using GaBi 6.0 software,we analyzed the associated carbon sequestration during floor production,with the initial planting density serving as the disturbance factor in a modular analysis.The results indicated that the cutting and finishing steps have relatively intense,negative influences on the environment,whereas transportation,ripping,and trimming do not.Additionally,recycling biomass waste has the potential to reduce greenhouse gas emissions.When the initial planting density was 3.0×3.0 m,carbon sequestration was relatively high.Although the emissions of freshwater pollutants,volatile organic compounds,and fine particulate matter（matter with a 2.5-μm diameter） were comparatively high,the reduction of greenhouse gas emissions was still excellent at this planting density.

Life cycle assessment for the "implicit" environmental impact of construction projects

The paper has established an assessment system and a quantitative calculation method of the 'implicit' environmental impact including environmental impact indicator,resources consumption indicator and energy consumption indicator. The quantitative calculation of the environmental impact indicator is based on the life cycle assessment system and the evaluation software BEES. The paper identifies normalization reference values and weights for 12 categories of the environmental impact. It also analyzes the environmental impact indicator in life cycle stages,raw materials,transportation,manufacturing,utilization,and end of life. A university refectory project is studied. The result has shown that human health,global warming and acidification are the first three environmental impacts in 12 categories. The environmental impact indicator per m2 of this project is 18.448×10-2 standard human equivalent weight. Moreover,97.3% of the total environmental impact occurs at the raw material stage,in which the most severe environmental impact is cancerous health effect; the global warming is the main impact at the transportation and manufacturing stages; the indoor air quality impact is at the usage stage.

Environmental sustainability modeling with exergy methodology for building life cycle

As an important human activity,the building industry has created comfortable space for living and work,and at the same time brought considerable pollution and huge consumption of energy and recourses. From 1990s after the first building environmental assessment model-BREEAM was released in the UK,a number of assessment models were formulated as analytical and practical in methodology respectively. This paper aims to introduce a generic model of exergy assessment on environmental impact of building life cycle,taking into consideration of previous models and focusing on natural environment as well as building life cycle,and three environmental impacts will be analyzed,namely energy embodied exergy,resource chemical exergy and abatement exergy on energy consumption,resource consumption and pollutant discharge respectively. The model of exergy assessment on environmental impact of building life cycle thus formulated contains two sub-models,one from the aspect of building energy utilization,and the other from building materials use. Combining theories by ecologists such as Odum,building environmental sustainability modeling with exergy methodology is put forward with the index of exergy footprint of building environmental impacts.

An Environmental Learning Support System Incorporating the Life Cycle Concept

The need for environmental education, which incorporates the life cycle concept into the learning program, will become increasingly greater all over the world. In the present study, an e-learning system, which is made up of 3 parts including text-based learning materials, quizzes to review the content of the learning materials and CO2 emission simulation, was designed and developed with the purpose of supporting environmental learning. Targeting a wide range of people, the operation period of this system was 1 month. Based on the results of questionnaire survey for users, it was evident that the quiz function and the simulation function of CO2 emission contributed to the efficiency in environmental learning, and the format of the e-learning system was effective and helpful for environmental learning. Additionally, with the users’ awareness related to environmental conservation before and after using the system, significant changes in awareness were seen in areas such as behavioral intention, sense of urgency and sense of connection. Furthermore, as it was revealed that 62% of the total access numbers were from mobile devices, it was effective to prepare an interface optimized for mobile devices enabling users to use the system from their smartphones and tablet PCs.

Population,Environment Dynamics,Poverty and Quality of Life in China

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Life cycle environmental impact assessment of biochar-based bioenergy production and utilization in Northwestern Ontario,Canada

Biochar-based bioenergy production and sub- sequent land application of biochar can reduce greenhouse gas emissions by fixing atmospheric carbon into the soil for a long period of time. A thorough life cycle assessment of biochar-based bioenergy production and biochar land application in Northwestern Ontario is conducted using SimaPro Ver. 8.1. The results of energy consumption and potential environmental impact of biochar-based bioenergy production system are compared with those of conventional coal-based system. Results show that biocbar land application consumes 4847.61 MJ per tonne dry feedstock more energy than conventional system, but reduces the GHG emissions by 68.19 kg CO2e per tonne of dry feed- stock in its life cycle. Biochar land application improves ecosystem quality by 18 %, reduces climate change by 15 %, and resource use by 13 % but may adversely impact on human health by increasing disability adjusted life years by 1.7 % if biomass availability is low to medium. Replacing fossil fuel with woody biomass has a positiveimpact on the environment, as one tonne of dry biomass feedstock when converted to biochar reduces up to 38 kg CO2e with biochar land application despite using more energy. These results will help understand a comprehensive picture of the new interventions in forestry businesses, which are promoting biochar-based bioenergy production.

Protecting the Environment as a Way of Life

LAQIAO is a tiny village in the karstic mountains of Libo. Its 96 Shui residents in their community of 20 households decided, in 2002,to take part in an environmental protection program. This was a welcome decision, in view of the ecological significance of the swamps and karst forests in the Maolan Nature Reserve of Libo.

生命共同体、环境正义与可持续发展——欧阳黔森创作中生态意识的三个维度

在现代性语境中用“生态”理论来解读极具生态化的乡土文学,是以另一种姿态重新打开了人与自然之间关系的思考。欧阳黔森这位具有独特职业身份和满怀文化忧思的作家,在创作中充分体现出在现代性语境中具有强烈的生态意识情怀:一是作为生命共同体的生态意识凸显;二是关于环境正义的生态意识审视;三是可持续发展的生态意识显露。

中国居民服装可持续消费行为及其影响因素的代际差异

针对中国可持续消费转型中因代际差异而带来的挑战,从可持续消费的视角将中国居民划分为4代,构建可持续消费视角下中国居民服装可持续消费行为的代际差异理论模型,并采用多阶段抽样方法进行实证研究。结果表明,4个代际群体在服装可持续消费行为及可持续消费认知、环境责任感、生活方式、主观规范等影响因素上均存在明显差异,对服装可持续消费行为的直接效应也存在显著差异。研究认为,在服装可持续消费的推进过程中,要针对不同代际特征、角色定位、生活环境等制定有针对性的教育引导策略和实践措施。

基于全生命周期的污油泥热脱附处理技术评价

基于全生命周期评价(LCA)软件eFootprint和国内典型污油泥热脱附处理实际,从绿色和可持续性两个方面对污油泥热脱附技术进行评价。结果表明:污油泥热脱附处理过程中,主要评价指标按所产生的环境影响由大到小排列依次为可吸入无机物(RI)、富营养化潜值(EP)、竞争-土地使用(CLU)、臭氧层消耗潜值(ODP)和水资源消耗(WU);回收油和天然气是初级能源消耗(PED)、非生物质资源消耗潜值(ADP)、WU、全球增温潜势(GWP)、ODP等11项评价指标的主要贡献因素,蒸汽是影响RI的最主要因素;污油泥热脱附处理产生的回收油能够抵消热脱附处理过程的部分能源和资源消耗,从而减小PED、ADP、GWP等评价指标的数值;为了进一步提升污油泥热脱附处理技术的绿色和可持续性,建议提高能源效率,减少蒸汽消耗,回收蒸汽余热,优化尾气净化系统和器具清洗系统,减少废水排放和水分挥发。

环境行政处罚下企业选择环保投资还是绿色创新——基于企业生命周期理论的解释

处于不同生命周期阶段的企业往往采取不同的战略倾向、组织结构及企业行为,在受到环境行政处罚后会做出差异化的环境行为选择。通过收集沪深A股上市公司的环境行政处罚数据,基于倾向性得分-双重差分法,从企业生命周期的视角实证检验了环境行政处罚对企业环保投资、绿色技术创新行为的影响。研究发现:环境行政处罚显著提高了企业的环保投资,但对绿色技术创新的影响不明显;分生命周期阶段看,受到环境行政处罚的成长期和成熟期企业均明显增加了环保投资,成熟期企业还会加大绿色技术创新力度,但衰退期企业的环境行为没有改变;多次处罚对企业的威慑效应更强,甚至衰退期企业在受到多次处罚后也会增加环保投资;环境行政处罚对重污染行业企业、非国有企业和环境信息披露水平较高企业的影响更显著。因此,环境监管部门应当基于企业生命周期构建更为精准的监管体系,提高环境监管的精度与准度,以罚促改,全面优化企业环境行为。

生命周期评价在钢铁行业的应用及研究进展

钢铁行业是传统意义上的高能耗和高污染物排放行业。由于生命周期评价(LCA)可以很好地量化其潜在环境影响,找到更有效的清洁生产路径,在推动钢铁行业的绿色化、低碳化和高质量发展中得到了广阔应用。本文通过国内外文献回顾和统计分析,重点论述了LCA在钢铁行业以下3个方面的应用及研究进展:1)评估钢铁企业/钢铁产品在从原材料采掘开始到生产出厂过程中的环境影响,寻找企业/产品节能减排机会;2)评估清洁生产改进技术或方案的环境效应,为钢铁行业提升清洁生产水平提供决策依据;3)评估其作为“中间产品”对下游行业的环境影响贡献,促进全产业链的可持续发展。最后,提出了未来研究关注的3个重要方向,旨在进一步推动LCA在钢铁行业的研究和应用。

生命共同体理念的哲学意蕴与环境治理创新

基于个人主义的传统环境治理体系,与环境治理的整体性、系统性、协同性的本质要求之间存在极大的落差和张力,面临治理实践的多重困境。人与自然生命共同体理念的提出确立了人与自然关系的新的定位,对环境治理形成了一种新的认知框架和解决方案,是理念、目标和方法论的有机统一体,因而具有治理哲学的意涵。环境治理从个人主义转向生命共同体,带来了主体、思维、手段、制度等方面的治理创新。具体表现为治理主体从个体主体转向治理共同体,治理思维从人对自然的单向治理转向双向建构,治理手段从个体关注转向关系和共同体,治理制度从主体性规范转向结构性连接。

极端降雨条件下淤地坝系溃决损失计算方法

近年来,由于自身“服役”状态欠佳和汛期极端降雨天气频发,淤地坝在发挥综合效益的同时面临着溃决风险。这对下游人民生命财产和生态环境保护造成极大威胁。因此,亟需提出极端降雨条件下淤地坝系溃决损失的定量计算方法。基于“家谱法”坝系溃决风险分析程序FT-IWHR、溃口流量程序DB-IWHR、一维洪水演进计算程序,提出淤地坝系溃决—洪水演进全过程计算方法,结合李—周法生命损失计算模型等,构建涵盖生命损失、经济损失、社会环境影响3方面的溃决损失计算方法体系;并在西五色浪流域淤地坝系进行应用。结果表明:警报时间对生命损失数量影响极大,充分警报和无警报下生命损失数量相差10倍左右且降雨量超过100年一遇后损失激增,坝系以中小型淤地坝溃决为主。溃决损失计算方法可实现对淤地坝系溃决损失进行快速量化评估,为淤地坝系安全度汛和病险坝除险加固工作提供技术支撑,同时建议西五色浪流域做好中小型淤地坝的溃决风险防控工作。

社会工作推进社会救助中“对象赋能”和“环境优化”的整合实践

随着我国迈入全面建设社会主义现代化国家的新发展阶段,社会工作成为推动社会救助从解决生存型困难向满足发展型需求转型的重要社会力量。从社会工作实践的生命模型理论和生态系统理论出发,探讨社会工作在社会救助实践中推动“对象赋能”和“环境优化”双重实现的可能性,结果显示:社会工作可以从社会救助对象在处理生命任务时与环境系统互动中的问题和需求出发,综合运用多种理论和方法,采取“生命任务—社会目标—实践系统”的整合实践框架,着力提升救助对象解决问题和使用资源的能力,同时改善救助对象发展所需的资源环境,促进政策资源系统、社会资源系统和社会网络资源系统等资源系统与救助对象的良性互动,从而推动发展型社会救助政策的落地实践。

黏结钕铁硼磁体生产和回收生命周期评价

关于钕铁硼磁体回收的研究越来越受到重视,但在起步阶段回收制备技术是否能够真正带来环境效益是不确定的。采用ReCiPe评价方法,选取制备1 kg黏结钕铁硼磁体为功能单位,分别对黏结钕铁硼磁体直接制备和回收制备流程的环境影响进行评价并对比。结果表明:直接制备流程中对环境影响最大的关键阶段为熔炼阶段,环境影响主要由钕和电力产生;回收制备流程中对环境影响最大的关键阶段为去除有机物阶段和热压固化阶段,环境影响主要由次氯酸钠和电力产生。生产1 kg黏结钕铁硼磁体,直接制备工艺对人体健康损害、生态健康损害和资源耗竭的环境损害分别是回收制备工艺的158.40%、180.63%、63.37%。

生命周期评价方法在印染产品环境影响分析中的应用

印染行业由于具有高水耗、高能耗和高污染的特性,成为全球范围内环境管理和可持续发展议程的重点行业。随着环境保护意识的增强和可持续发展需求的提升,生命周期评价方法可以评估产品从原材料获取、生产、使用到废弃全过程的环境影响,识别重点环境影响区域,提出相应的改进措施。在印染产品的环境影响中应用生命周期评价方法,可以通过详细的案例分析,定义目标和范围,执行生命周期清单分析,进行生命周期影响评估,并对结果进行解释。基于生命周期提出优化策略,可以为印染行业的环境影响减缓提供理论基础。

水力发电生命周期评价及碳足迹区域化分析

基于生命周期评价方法,对我国典型水电站水力发电生命周期碳足迹及其他环境影响进行了评估,并分析讨论了不同区域水力发电碳足迹的差异性及原因。结果显示,三峡水电站单位水电碳足迹(以CO_(2)当量计)为12.7 g/(kW·h),主要来源于运行阶段,造成其他环境影响的主要阶段为土建工程阶段,其次为机电设备制造阶段;我国不同省级行政区单位水电碳足迹差距较大,与全国平均值相差±20%以上的省级行政区有24个;各省级行政区运行阶段碳足迹占比为47.94%~96.82%,占比超过80%的省级行政区有19个。研究结果可以为我国及省级发电清单编制与电网结构调整提供数据支撑。