Comprehensive Assessment of Regional Circular Economy Development Based on Efficiency of Resource & Environment:A Case Study of Jiangsu Province

In the first, the paper gave a retrospective analysis on the comprehensive assessment of circular economic development. According to the requirement of improving resource & environment efficiency, the paper designed an analytical framework for a comprehensive assessment of regional circular economic growth, which consists of the goal, object and technical line of the comprehensive assessment of regional circular economic development. Given that, the paper discussed the criterion for choosing the assessment index, the approaches of index's weighing determination, the means of data standardization, and the reference system of assessment index value and so on. According to the framework of regional circular economic development evaluation,the paper made a comprehensive evaluation of Jiangsu Province's circular economic development. The result shows that from temporal change, Jiangsu Province's circular economic development had different stages;from the spatial comparison, there is variance among different regions, which could be divided into different types according to the spatial variance and the relation between the development of circular economy and the aggregative index number. There was a remarkable correlation between circular economic development level and GDP or the 2nd industry GDP. Finally, the paper gives some suggestions on how to promote the development of circular economy in Jiangsu Province.     

都市型经济开发区生态化建设路径研究

总结了都市型经济开发区的类型和特点,重点分析了都市化经济开发区的生态环境质量制约性因素,提出了从产业生态化建设、土地利用生态化建设、信息现代化建设以及区域环境健康保障体系四个角度分析了生态化建设的路径体系和具体的措施。     

“限塑令”的公众行为响应与白色污染控制对策——以咸宁市为例

以咸宁市消费者人群为研究对象,通过问卷调查统计并分析了消费者对政策（塑料购物袋收费）的行为响应。与此同时根据咸宁市统计年鉴和环境公报.统计估算了城市生活垃圾及白色污染的产生量及其变化趋势,研究结果表明：政府强制措施的出台限制了白色垃圾的产生量,但公众配合意愿尚不高。在此基础上,基于系统化原理,本研究提出了城市生活垃圾及白色污染治理的对策措施。     

日本东京供水管网的漏损预防管理

供水管网的漏损控制管理是城市水资源管理以及节水管理中的重要环节,东京作为国际上管网漏损控制最优秀的城市之一,漏损率从1955年战后恢复时期的20％控制到2007年的3．3％。多年来,东京在漏损控制技术和管理方面积累了丰富的优秀经验,并且建立了完善的供水管网漏损预防管理体系,指出为了保证有效的漏损控制和预防,必须做到以下四个方面,即准确掌握管网属性信息、重视管网的维护和更新、不断发展漏损控制与预防技术及重视人力资源管理及人才培养。东京成功的漏损控制经验可以从管理体制、管理手段、技术研发、人才培养等方面对中国的供水管网漏损管理及节水管理提供有益的借鉴经验。     

Inactivation of Cryptosporidium by ozone and cell ultrastructures

The fluorescence staining method and scanning electron microscopy (SEM) were used to study the effect of ozone (O3) inactivating Cryptosporidium in water and cell ultrastructures variation to shed light on the mechanism of inactivation preliminarily.Results indicated that O3 had a stronger inactivating capability.When the concentration of O3 was above 3.0 mg/L and the contact time was up to 7 min,a significant inactivating effect could be achieved.The turbidity on inactivation effects was also found to be statistically significant in artificial water.With increases in turbidity,the inactivating effect decreased.Inactivation rate improved with a temperature increase from 5 to 25°C,but decreased beyond this.The inactivating capability of O3 was found to be stronger under acidic than that under alkalic conditions.When the concentration of organic matter in the reaction system was increased,the competition between Cryptosporidium and organics with O3 probably took place,thereby reducing the inactivation rate.In addition,the cellular morphology of Cryptosporidium varied with different contact times.At zero contact time,cells were rotundity and sphericity,at 60 sec they became folded,underwent emboly,and burst at 480 sec,the cell membrane of Cryptosporidium shrinked and collapsed completely.     

磁湖底泥重金属污染与潜在生态风险评价

为解磁湖底泥中重金属含量、污染程度以及各污染物的潜在生物毒性,对磁湖8个底泥样品中6种金属元素(Cu、Pb、Ni、As、Hg、Cd)进行了分析研究。利用地累积指数法和单因子评价法对底泥中的重金属污染程度进行了综合性的评价。利用潜在生态风险指数法对磁湖底泥中的重金属潜在生态风险进行了评价,结果表明,磁湖底泥中主要的重金属污染物是Cd和Cu,其次是Pb、As、Ni、Hg。各重金属的潜在生态风险从大到小的排列次序为:Cd>As>Cu>Pb>Hg。     

不同污染区对绿化树种游离脯氨酸含量的影响

为了解兰州市大气污染的情况,选择兰州市的主要绿化树种为研究对象,对叶片中的脯氨酸含量进行了测定,并且运用Statistica6.0软件进行分析.结果表明同一树种在不同污染区的脯氨酸含量不同,存在极显著性的差异,同一污染区的各种绿化植物的脯氨酸含量也存在显著性的差异.5种绿化树种的抗污染能力为杨树＞小叶黄杨＞椿树＞国槐＞圆柏,兰州市7个污染区的污染程度为兰炼厂区＞兰化厂区＞橡胶厂＞西关＞西站＞交大＞兴隆山.研究结果可以为兰州市的大气污染治理提供理论和实践依据.     

泰来县抗旱灌溉引水工程水土流失预测

采用类比法,结合泰来县抗旱灌溉引水工程的调查进行综合分析,从基本建设期水土流失量,林草恢复期水土流失量方面进行预测,得出该工程水土流失预测总量49835t,新增水土流失量25458t的结论。     

DEM格网尺度对AnnAGNPS预测山地小流域径流和物质输出的影响

为了解流域地形空间参数和其它参数的精度对农业非点源污染模型AnnAGNPS预测准确性的影响,利用三峡库区黑河小流域观测资料校准了AnnAGNPS模型,分析了1.5-12.5m格网尺度DEM对地形参数和模型负载输出的影响.结果表明,1.5～12.5m格网尺度DEM对流域径流量、洪峰流量、总N输出影响不显著,但对泥沙、总P、有机碳输出影响显著.三峡库区类似小流域宜采用5m格网尺度DEM,AnnAGNPS模型较不适合于尺度较小、坡度较大的小流域泥沙负载预测.