Heavy metal pollution in intertidal sediments from Quanzhou Bay, China

The concentrations of eight heavy metals （Cu, Zn, Pb, Cd, Cr, Ni, Hg, and As） in the intertidal surface sediments from Quanzhou Bay were determined to evaluate their levels and spatial distribution due to urbanization and economic development of Quanzhou region, southeast China. The ranges of the measured concentrations in the sediments are as follows： 24.8-119.7 mg/kg for Cu, 105.5-241.9 mg/kg for Zn, 34.3-100. 9 mg/kg for Pb, 0.28-0. 89 mg/kg for Cd, 51.1-121.7 mg/kg for Cr, 16.1-45.7 mg/kg for Ni, 0.17-0.74 mg/kg for Hg, and 17.7-30.2 mg/kg for As. The overall average concentrations of above metals exceed the primary standard criteria but meet the secondary standard criteria of the Chinese National Standard of Marine Sediment Quality. Several contents of Cu and Hg exceed the secondary standard criteria at some stations. The results of geoaccumulation index （Igeo） show that Cd causes strong pollution in most of the study area. There are no significant correlations among most of these heavy metals, indicating they have different anthropogenic and natural sources. Some locations present severe pollution by heavy metals depending on the sources, of which sewage outlets, aquatic breeding, and commercial ports are the main sources of contaminants to the area.     

Response relationships between abrupt seasonal temperature changes/warming (cooling) hiatuses in China and their influencing factors

Environmental Science and Pollution Research - The mechanisms of abrupt seasonal temperature changes and warming (cooling) hiatuses remain unclear. Clarifying how they respond to various...     

生物-物化工艺处理造纸工业废水实例分析

以任丘市星火集团公司造纸厂废水处理工程为例，介绍了采用生物处理、物化处理相结合的工艺处理造纸工业废水的工艺流程以及主要设计参数。该工艺运行稳定，处理效果好，ＣＯＤ的去除率达到８０％以上，处理后的废水水质达到了《造纸工业水污染物排放标准》（ＧＢ３５４４－９２）中的二级标准。     

运用灰色系统理论对广州市环境噪声污染的原因进行分析

运用灰色系统关联度的分析方法，对广州市环境污染的原因进行分析，结果显示：影响广州市环境噪声的因素中，占主要地位的是城市机动车数量，其次是人口密度。     

Cooperative analysis of infrastructure perfection and residents’ living standards in poverty-stricken counties in Qinghai Province

Environment, Development and Sustainability - The western region of China has always been the main battlefield for poverty alleviation. It is essential to explore the interaction mechanism between...     

长江,嘉陵江重庆段排污负荷研究

就长江，嘉陵江重庆干流段和城区段污染物的来源以及估算污染负荷的方法进行了详细地介绍，给出各类污染源生产的污染负荷，并进行了分析比较，提出了今后重庆控制的污染物和污染源。     

市区性河流水质数学模型研究

本文通过对哈尔滨信义沟的调查和分析，研究了市区性河流的自净规律，将高浓度悬浮物沉降和有机物厌氧分解纳入河流水质模型，从而得出了广义的市区性河流多河段水质数学模型，这种建模的方法对市区性河流具有普遍的意义．     

泰州市东城河水环境整治的生态思考

分析了泰州市东城河存在的水生态环境问题,指出目前在综合整治方面存在的不足之处,提出要引用欧洲河流生态治理方面成功的经验,确立"以人为本、恢复生态、人水和谐"的水环境综合整治新理念.     

河流水质1号模型探讨

介绍了河流水质模型70年来的发展历程和目前存在的不足之处,论述了河流水质1号模型(RwQM1)的研究成果.河流水质1号模型从活性污泥模型ASM中发展而来,并推出了建立模型的决策化方法,其对生化反应模型的完善而成为河流水质模型发展的一个标准平台.本文重点介绍了其在生化反应模型方面的进展,并和QUAL2E做了比较.     

长春市污水资源化现状及对策

论述了长春市水资源现状，并提出水资源可持续利用的途径——污水资源化，加快长春市生态省建设的步伐，促进可持续发展战略的顺利实施。