可持续发展城市判定指标体系

对可持续发展城市指标体系进行了探讨,提出了真实储蓄率、多元综合指标、复合价值、可持续发展度的概念及模式。可持续发展城市指标值的确定是一个复杂的问题,要求具有完善信息的采集,完备的监测系统,建立必要的评价程序和制度。     

沉淀分离富集-电感耦合等离子原子发射光谱测定土壤中可溶态稀土元素

研究电感耦合等离子体原子发射光谱测定土壤中微量可溶态稀土元素的方法。在适宜的ｐＨ＝１０－１１条件下,以ＭｇＣｌ２为载体沉淀分离除去浸提液中的大部分基体杂质如Ｎａ＾＋,Ａｃ＾－,Ｃａ＾２＋,Ｍｇ＾２＋等,有效地消除了这些杂质的干扰,提高了测定方法的准确度;同时,待测可溶态稀土元素被沉淀集,样品中总稀土及单一稀土加标回收率为８８％－１１０％,样品测定结果满意,方法简便快速。     

膜生物反应器设计中工艺参数的探讨

膜生物反应器工艺中 ,系统构型、膜组件和生物反应器是中试设计中的关键因素。对工艺中的设计依据、构型、膜组件和有机负荷、污泥浓度、固体停留时间、水力停留时间等生物反应器的技术参数进行了探讨 ,为膜生物反应器中试设计提供了帮助     

煤矸石的综合利用现状

煤矸石是我国排放量最大的工业废渣之一 ,不仅占用大量农田和土地 ,而且严重污染环境。为了加强对煤矸石利用以使其资源化 ,对我国的煤矸石资源状况、我国煤矸石的综合利用技术研究的现状进行了综述 ,并对煤矸石资源化提出了一些设想。     

Knowledge domain and emerging trends of carbon footprint in the field of climate change and energy use: a bibliometric analysis

Carbon footprint (CF) research has attained tremendous popularity for improving the climate environment purposes. In particular, current energy use has been identified as the main cause of climate change. CF plays an irreplaceable role in managing energy use, reducing gas emissions, and improving climate change. The objective of this study was to review studies that have developed CF and to perform a bibliometric analysis using two key terms: “climate change” and “energy use”. From bibliometric analysis using CiteSpace and VOSviewer, it was possible to establish a knowledge map of cooperative network structure and research evolution. We are aiming to reveal the main logical chain of CF research leading to climate change, to make up for the lack of current literature, and provide research inspiration for researchers. The research findings mainly focus on four aspects. First, the relevant research began in 2008 and is in a state of continuous rise. Second, due to the law of research development and the prominence of practical problems, related research has experienced a stage from conceptual methods to specific problems. Third, China and the USA assume an important role in which international cooperation is the overall trend. Fourth, related research can be divided into CF algorithm research, ecological environment management research, and specific cross-industry fields. In addition, possible opportunities for change in related research are explored. It is also suggested that the integration of CF with other footprints, when energy use and environmental change are fully considered, may become an important future research trend by providing a more comprehensive environmental impact.

     

What has caused regional income inequality in China? Effects of 10 socioeconomic factors on per capita income

This study analyzes the driving factors behind regional income inequality to provide an important reference for China and other developing countries and to support the formulation of more effective regional development policies. The study used data from 625 county-level administrative units in China in 2017 and conducted a total factor analysis of China's regional income based on 10 economic dimensions using spatially explicit regression methods. The results show that commerce, population footprint, industrialization, and investment are the main factors that affected a Chinese region’s income, but different factors have different degrees of influence in different regions. The impact of economic institutions (developing an institutionally diverse market economy) on income cannot be ignored. Based on our findings, China should give local governments more autonomy, so they can formulate strategies that account for local constraints and opportunities, thereby increasing their chances of decreasing regional income inequality.

     

液化石油气站装卸连接装置改造的安全隐患分析

针对目前液化石油气站内装卸软管已强制要求改装为液体装卸臂的现状,本文梳理了原质监部门和安监部门对液化石油气站内装卸连接装置的不同要求,对在用液体装卸臂改造存在的安全隐患和后续的监管问题进行了分析,并对液体装卸臂的改造和监管提出了几点建议.     

工业复杂污水综合处理技术研究与应用

普光天然气净化厂在运行中排出的大量污泥、检修中产生的大量成分复杂污水,是困扰下游污水处理的重大难题。文章进行了复杂污水存储技术研究,污水预处理技术研究,污水回收利用技术研究,泥水分离技术研究。文章优化污水存储方案,提升存储空间,解决了净化厂检修污水排放集中、排放量大的难题;组合PAC药剂加注+连续曝气污水预处理工艺技术,最大程度上降低了SBR池处理负担;使外排水满足循环冷却水补水水质要求,实现了外排水的有效回收利用;实现了泥水高效分离,极大降低了污泥处置和运输费用。     

Insights into fouling behavior in a novel anammox self-forming dynamic membrane bioreactor by the fluorescence EEM-PARAFAC analysis

Environmental Science and Pollution Research - Fouling behavior of the novel anaerobic ammonium oxidation (anammox) self-forming dynamic membrane bioreactor (SFDMBR) was elucidated, which is using...     

Lightweight aggregate obtained from municipal solid waste incineration bottom ash sludge (MSWI-BAS) and its characteristics affected by single factor of sintering mechanism

ABSTRACT

To solve the disposal problem of municipal solid waste incineration bottom ash sludge (MSWI-BAS), using it as the main raw material to prepare lightweight aggregates (LWA) for resource utilization. Sintering is an important process to achieve the desired microstructure and material properties. This paper investigates the characteristics of LWA affected by single factor of sintering mechanism (sintering temperature, heating rate and soaking time). Results show that sintering temperature increased from 1130°C to 1160°C caused high-density microstructure materials gradually formed in LWA, leading to particle strength increased from 0.1 MPa to 3.64 MPa, particle density showed an overall upward trend, reaching a maximum of 916 Kg/m³ at 1160°C, and 1 h water absorption reduced from 68% to 25%. The heating rate of 15 K/min was beneficial to the formation of dense phase structure which could increase the particle strength, and the water absorption rate reached the lowest at this time, while the particle density was less affected by heating rate. When soaking time extended from 5 min to 20 min, particle strength and compressive density were gradually increased, and 1 h water absorption showed an overall downward trend, indicating that a longer soaking time was not conducive to the retention of pores. This study demonstrates that the utilization of MSWI-BAS to make high-performance LWA is feasible, along with the preferable environmental and economic benefits.

Implications: MSWI-BAS were selected to produce lightweight aggregate (LWA), so that the sludge disposal problem is reduced. The effects of sintering temperature, heating rate and soaking time on the characteristics of LWA were investigated. Compact glass structures are formed at 1150°C and 1160°C which greatly improve the strength. The heating rate has little influence on the physical properties of LWA products. The particle density of LWA increases after the sintering soaking time reaches 15 minutes.