نتایج جستجو برای: organic pollution index

تعداد نتایج: 654784  

ژورنال: سلامت و محیط زیست 2017

Background and Objective: Street dust is considered as one of the important sources of particulate matters and heavy metals in the atmosphere. The goal of this study was to assess the heavy metals pollution in street dust of Tehran and evaluate their ecological risk. Materials and Methods: The sampling of street dust was carried out in two areas at the east and west of Tehran. After preparatio...

2001
Robert W. Derlet

The health effects of air pollution include increases in Air pollution on Pdient visits in &be 1 severity and incidence of asthma. exacerbation of COPD. increase California faces both increasing air temperatures as well as air pollution. This conclusion is being drawn by many non-scientists who simply observe daily atmospheric conditions: more hot days exist in many areas of California and many...

Journal: :iranian journal of toxicology 0
محمدرضا وصالی ناصح mohammad reza vesali naseh , university of tehran, tehran, iran. عبدالرضا کرباسی abdolreza karbassi , university of tehran, tehran, iran. فریدون غضبان fereydoon ghazaban , university of tehran, tehran, iran. اکبر باغوند akbar baghvand , university of tehran, tehran, iran.

background: evaluation of heavy metals as toxic pollutants in environment has a significant importance in environmental pollution studies. surficial sediments of water resources have a high potential in releasing heavy metals to the upper water environment, hence sediment analysis presents guidelines to the authorities for monitoring the environmental systems. methods: in this study, total and ...

Journal: :international journal of environmental research 0
m. aktaruzzaman department of environmental sciences, jahangirnagar university, dhaka-1342, bangladesh m.a.z. chowdhury agrochemical and environmental research division, institute of food and radiation biology, atomic energy research establishment, savar, dhaka-1349, bangladesh z. fardous agrochemical and environmental research division, institute of food and radiation biology, atomic energy research establishment, savar, dhaka-1349, bangladesh m.k. alam agrochemical and environmental research division, institute of food and radiation biology, atomic energy research establishment, savar, dhaka-1349, bangladesh m.s. hossain department of environmental sciences, jahangirnagar university, dhaka-1342, bangladesh a.n.m. fakhruddin department of environmental sciences, jahangirnagar university, dhaka-1342, bangladesh

pollution of water and soils by heavy metals is an emerging problem in industrialized countries.the present study was conducted to investigate the heavy metals concentration in water and sedimentsamples from ship breaking sites of sitakunda to assess the potential ecological risk posed by heavy metalusing different methods. heavy metals concentration was analyzed by atomic absorption spectrosco...

2010
Elia Georgiana Dragomir

One of the classical data mining techniques is k-nearest neighbor. This method uses the class of the k nearest neighbor to classify a new instance. The distance is calculated with one of the multiple mathematical distance metrics. In this paper, the technique is used in the air quality forecast domain in order to predict the value of the air quality index. This index is used to categorize the p...

2017
Yi Zhou Lianshui Li Lei Hu

Air pollution and lung cancer are closely related. In 2013, the World Health Organization listed outdoor air pollution as carcinogenic and regarded it as the most widespread carcinogen that humans are currently exposed to. Here, grey correlation and data envelopment analysis methods are used to determine the pollution factors causing lung cancer among residents in Nanchang, China, and identify ...

2012
Ryuji Kondo Yumi Mori Tomoko Sakami

Fish farm sediments receive a large amount of organic matter from uneaten food and fecal material. This nutrient enrichment, or organic pollution, causes the accumulation of sulphide in the sediment from the action of sulphate-reducing bacteria (SRB). We investigated the effect of organic enrichment around coastal fish farms comparing the SRB community structure in these sediments. Sediment sam...

Journal: :Environmental Health Perspectives 1986
G Matanoski L Fishbein C Redmond H Rosenkranz L Wallace

This paper presents some of the issues that remain to be resolved in order to assess the risk of cancer related to exposure to organic particulates. Most reviews of the effects of organic particulates from the outdoor environment on the risk of lung cancer show that this source seems to play a minor role. However, as fuel use and chemical composition of air pollutants change, the contribution o...

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