نتایج جستجو برای: pollution concentration

تعداد نتایج: 443080  

Journal: :محیط شناسی 0
عبدالرضا کرباسی دانشکده محیط زیست دانشگاه تهران شهرزاد ولوی کارشناس ارشد محیط زیست دانشکدة محیط زیست واحد علوم و تحقیقات اهواز

present survey studies intensity of heavy metals pollution (ca, fe, ni, cd, pb, zn, as, hg) in the sediments of bamdezh wetland. the main objective of the study is to quantify heavy metal pollution intensity in the wetland. other objectives of the study are separation of natural and anthropogenic heavy metal pollution and identification of the origin of heavy metals. results of this study shows...

2014
Ling Yao Ning Lu

The public is increasingly concerned about particulate matter pollution caused by respirable suspended particles (PM10) and fine particles (PM2.5). In this paper, PM10 and PM2.5 concentration are estimated with remote sensing and individual air quality indexes of PM10 and PM2.5 (IPM10 and IPM2.5) over mainland China in 2010 are calculated. We find that China suffered more serious PM2.5 than PM1...

2013
Mansooreh Dehghani Mohammad Mehdi Taghizadeh Hassan Hashemi Ebrahim Rastgoo

The city of Zarghan is located 25 km northeast of Shiraz, southern Iran. Zarghan is affected by numerous pollution sources such as oil refinery, an industrial park, and Shiraz-Tehran highway. The numerous contaminating sources around Zarghan can cause serious local air pollution. Sulfur dioxide gas is an important index of air pollution in cities. Therefore, in order to control and manage Zargh...

Journal: :Environmental science & technology 2006
Yuli Zhao Qiuquan Wang Limin Yang Zhenji Li Kenichi Satake Kin-Ichi Tsunoda

An alternative normalization method was developed for evaluating atmospheric polycyclic aromatic hydrocarbons (PAHs) pollution level when using tree bark as a passive sampling medium. Perylene (PER), which mainly stems from natural biogenic processes, was proposed as a "natural internal compound" (NIC) of atmospheric PAHs accumulation processes from air into the bark, and a concentration ratio ...

2007
Hongming He Jie Zhou Yongjao Wu Qian Yu Wanchang Zhang Xiuping Xie

The study investigates water quality pollution impacts on urbanization by analyzing temporal and spatial characteristics of different water quality parameters, and simulating economic loss of water quality pollution in Xi’an, China from 1996 to 2003. Results show that organic pollutants were the greatest contributors of surface water quality pollution from 1996 to 2003. High values existed in p...

Plants exposed to air pollution show returnable and unreturnable biochemical and physiological alterations. So biochemical parameters can provide valuable information about physiological condition of plants that are subjected to air pollution. This study was performed to determine the effects of air pollutants on the amount of proline, protein, calcium and phosphorus in Medicago sativa and Phas...

2015
Fanyong Meng Hao Wu Yinping Zhang

This study examines characteristics of atmospheric methylsiloxane pollution in indoor settings where interior renovation/redecoration is being undertaken, in addition to ordinary family homes and inside family cars. Concentrations of atmospheric methylsiloxane in these locations were approximately one order of magnitude higher than that in outdoor areas. The average indoor concentration of meth...

Journal: :iranian journal of public health 0
yan li zhejiang provincial key laboratory of pathophysiology, department of histology and embryology, medical school of ningbo uni-versity, ningbo, china. qiaoyan gao zhejiang provincial key laboratory of pathophysiology, department of histology and embryology, medical school of ningbo uni-versity, ningbo, china. mingcai li zhejiang provincial key laboratory of pathophysiology, department of histology and embryology, medical school of ningbo uni-versity, ningbo, china. mengyang li zhejiang provincial key laboratory of pathophysiology, department of histology and embryology, medical school of ningbo uni-versity, ningbo, china. xueming gao zhejiang provincial key laboratory of pathophysiology, department of histology and embryology, medical school of ningbo uni-versity, ningbo, china.

the environmental pollution is one of the factors contributing to the decrease of sperm quality for human beings. the aim of this study was to assess cadmium (cd), chromium (cr), and copper (cu) concentration of man in environmental pollution site, and explore relationships between men exposure to cd, cr, and cu and semen-quality parameters in environmental pollution site.ninety five men were r...

2015
Patil Vilas Sardar Patel

Most of the cities of developing countries are facing serious noise pollution problem, due to the concentration of motor vehicles and human population within the limited urban areas. The study presents the status of noise pollution at selected signalized intersections of Nashik city, Maharashtra, India. The study is conducted using sound level meter and simultaneously classified traffic volume ...

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