Land use change and soil carbon sequestration in China: Where does it pay to conserve?

Regional Environmental Change - This paper estimates the impact of land use change on soil organic carbon (SOC) sequestration in China from 1985 to 2005 using a nationwide, georeferenced database...     

城市化进程中区域安全文化体系构建——以深圳市大鹏新区为例

为应对城市化进程中凸显的安全发展问题,发挥安全文化的基础性保障作用,基于对区域安全文化系统功能及组成要素的分析,探讨其内涵、特征与作用机理,构建区域安全文化结构模型,建立相应的指标表征体系,包括4个一级指标,16个二级指标,47个三级指标。针对深圳市大鹏新区采取实地走访与问卷测评相结合的方式进行实例研究,以李克特量表和蛛网图对数据进行处理分析。结果表明,城区转型发展过程中暴露出利益驱动型短期发展观,安全工作表面化,社会公共参与不足等问题,区域安全文化体系建设亟待从战略高层到群众基础进行有效整合。     

Dynamic evaluation of land productivity in China

For making rational and scientific land-use planning,an inventory indicator of land productivity subject to biophysical limitations and human disturbance is required.This study introduces agricultural land productivity(ALP)as the dynamic indicator to measure land productivity,involving factors that affect agricultural production,such as characteristics of climate,soil,and terrain.As a case study of this dynamic indicator,ALP was estimated at county level and aggregated into provincial level in the whole of China.The result shows that ALP increased during 2000-2010 in China,and the ratios of ALP to the actual grain yield were 65.40%and 66.38%in the years 2000 and 2005,respectively.The ALP is an effective dynamic indicator to estimate the land productivity and to represent the basic conditions about the supply of water,energy,nutrients,and the physical basis for plant growth,as well as the local input.ALP estimation could provide supporting information for policy-making about land production planning and land-use management.     

A new program to promote injury prevention and its application in China

To create Safe Community is considered a new methodology to promote Harmonious Society in China. Safe Community (SC) is centralized by “injury prevention” which is a concept involved from occupational safety and health in process industry. In this paper, it first examined the definition and elements of SC. Then, it introduced a Safe Community program in Honey Lake of Futian District of Shenzhen in detail to depict the actual procedure to create a desired Safe Community in China. In this application, Occupational Safety and Health Council in Hong Kong played an important role to instruct the design and execution of SC principle and suggest ways to crystallize a culture of safety within a Chinese community. From the SC program in Honey Lake of Futian District of Shenzhen, China has found out a new way to promote injury prevention in a community. Also, using these experiences from this program, more SC could be constructed that is beneficial to the safety and health of Chinese people.     

以回用为目标的污水深度处理组合工艺及其发展

通过对现有各种污水回用深度处理工艺进行归纳整理,概要介绍了国内外城市污水回用深度处理传统工艺及其发展状况,重点阐述了膜分离技术与污水深度处理工艺的集成与组合在污水回用中的应用,指出了污水回用工艺的优化组合与集成对缓解淡水资源短缺、实施水资源的可持续利用具有深远的战略意义。     

微生物絮凝剂产生菌的絮凝性能

从废水处理厂和土壤中分离产絮凝剂的菌株,其中一株产絮凝剂的细菌W7—1对高岭土的絮凝活性达94％,初步鉴定该菌为Klebiella sp．,W7—1对产絮凝剂的培养条件要求简单,产絮凝剂的最佳碳源和氮源为蔗糖和牛肉膏,pH在5～10的范围内都适应絮凝剂的产生,但pH为8．0时絮凝活性最高。絮凝剂的添加量为10mL／L、絮凝体系pH为7～10时絮凝活性好,提纯后的絮凝剂产量高于其它絮凝剂近10倍,分析表明,絮凝剂成分为多糖,且有很好的热稳定性,加热至100℃、30min后絮凝活性不变。     

絮凝剂XN98处理油田聚合物驱含油污水

通过筛选复配得到絮凝剂XN98,该絮凝剂由五种成分组成,其中以无机絮凝剂为主,含有少量有机絮凝剂。该絮凝剂处理油田聚合物驱含油污水效果良好,絮凝剂用量为50 mg/L时,处理后水质可以达到中、高渗透层含聚污水处理指标。絮凝剂XN98处理聚合物驱污水的药剂成本约为0.2元/t,约为PAC（聚铝）的三分之一。