نتایج جستجو برای: water extract and nitrate

تعداد نتایج: 16954113  

Ali Almasi, Ali Jamshidi Rasool Momenzadeh Razieh Yazdizadeh Rouhollah Shokri, Shima Rezaei,

Nitrate has been the most common chemical contaminant in water resource. This ion is introduced into the water via different ways, but more items of nitrate pollution was connected with farming-based drainage and sewage effluent. In this descriptive-analytical study, groundwater nitrate and nitrite concentrations of 8 wells on Dehloran, Ilam, Iran, were analyzed in 2015 to determine the causes ...

Journal: Pollution 2020

The aim of this study was to compare the selected aquatic plants ability to remove nitrate from wastewater. Excess of these nutrients in water can directly affect human health (methemoglobinaemia) or indirectly through the products of secondary pollution include eutrophication. Negative impact of nutrients excess in surface water often causes the destruction of water ecosystems, and therefore, ...

The aim of this study was to compare the selected aquatic plants ability to remove nitrate from wastewater. Excess of these nutrients in water can directly affect human health (methemoglobinaemia) or indirectly through the products of secondary pollution include eutrophication. Negative impact of nutrients excess in surface water often causes the destruction of water ecosystems, and therefore, ...

Journal: :jentashapir journal of health research 0
mansooreh dehghani department of environmental health, research center for health sciences, school of health, shiraz university of medical sciences, shiraz, ir iran samaneh shahsavani department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran; department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran. tel: +98-9385322369, fax: +98-7137260225 narges shamsedini department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran mohammad reza javaheri department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran

conclusions it was shown that the removal efficiency of nitrate was directly proportional to the amount of chaff, temperature, and contact time but inversely to the ph. this study showed that nitrate removal by chaff is a promising technique. results the result of this study revealed that chaff as an absorbent could remove nitrate from solutions, and the efficiency of adsorption increased as co...

Journal: Pollution 2018

Nitrate is a major contributor to water contamination, which can affect humans' and animals' health. Due to increased sewage production, growth of agricultural activities, and development of urbanization, recent years have seen an increase of Nitrate in water resources. Drinking water resources in both rural and urban areas of Jiroft City are supplied by water wells, scattered throughout the re...

ژورنال: سلامت و محیط زیست 2010
رماوندی, بهمن, مرتضوی, سید باقر, موسوی, غلامرضا,

Background and Objectives: Nowadays nitrate concentrations in surface water and especially in groundwater have increased in many locations in the world. Since nitrates cause many health and environmental concerns, increased nitrate concentrations in groundwater have led to rendered aquifers unusable as water sources. So, as the water demand is still increasing the throughout the world, decreasi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

Nitrate is a major contributor to water contamination, which can affect humans' and animals' health. Due to increased sewage production, growth of agricultural activities, and development of urbanization, recent years have seen an increase of Nitrate in water resources. Drinking water resources in both rural and urban areas of Jiroft City are supplied by water wells, scattered throughout the re...

Journal: :environmental health engineering and management 0
ali ahmad aghapour environmental health engineering, department of environmental health engineering, school of health, urmia university of medical sciences, urmia, iran sepideh nemati environmental health engineering, student research committee, school of health, urmia university of medical sciences, urmia, iran amir mohammadi environmental health engineering, student research committee, school of health, urmia university of medical sciences, urmia, iran heshmatollah nourmoradi environmental health engineering, department of environmental health engineering, school of health, ilam university of medical sciences, ilam, iran sima karimzadeh environmental health engineering, student research committee, school of health, urmia university of medical sciences, urmia, iran

background: nitrate is an acute and well-known hazardous contaminant, and its contamination of water sources has been a growing concern worldwide in recent years. this study evaluated the feasibility of nitrate removal from water using the traditional coagulants alum and ferric chloride with lower concentrations than those used in the conventional coagulation process. methods: in this research,...

Journal: :journal of agricultural science and technology 2014
h. ebrahimian e. playan

high efficiency and uniformity of water and fertilizer application are usually, considered as the ultimate goals of an appropriate design and management of irrigation and fertigation systems. the objective followed in this paper was to present a simulation-optimization model for alternate vs. conventional furrow fertigation. two simulation models (surface fertigation and swms-2d models) along w...

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