نتایج جستجو برای: dissolved organic carbon

تعداد نتایج: 471610  

Journal: :آب و خاک 0
حلاج نیا حلاج نیا حق نیا حق نیا لکزیان لکزیان رمضانیان رمضانیان

elevated atmospheric carbon dioxide and other green house gases have increased the earth temperature in recent century, which it affects all biochemistry cycles in soils. to examine the effect of atmospheric co2 concentration and temperature on n forms in soil solution in a calcareous soil, an experiment was conducted in a completely randomized design with factorial arrangement in the laborator...

Journal: :international journal of environmental research 2010
j.i. nirmal kumar r.n. kumar s. viyol

methane is one of the important greenhouse gases that contribute to a rise in global mean surface temperature. aquatic environments are postulated to contribute > 50% of the total global methane (ch4) flux to the atmosphere (de angelis and lilley, 1987). dissolved methane concentration in surface waters was measured from january to december 2008 at two selected sites upper reaches (ongc bridge)...

بذرافشان, ادریس, بیگلری, حامد, جنیدی جعفری, احمد, کرد مصطفی‌پور, فردوس,

Background and Aim: Nowadays, regarding the increased human and geological activities, concentrations of toxic and carcinogenic disinfectant by-products– like Trihalomethanes -which have an organic base, in drinking water sources, has worryingly increased. Thus, the present study aimed at surveying the amount of dissolved organic carbon (doc) removed from aqueous solution by Fenton process. Mat...

2016
Tomorra Elizabeth Smith Elizabeth Smith Randall Kolka Matthew Helmers Michael Castellano

.............................................................................................viii CHAPTER 1: LITERATURE REVIEW...............................................................1 1.0 Introduction...........................................................................................1 1.1 Dissolved organic carbon........................................................................

Journal: :international journal of advanced biological and biomedical research 2014
shahrzad kabirinejad mahmoud kalbasi amir hoseein khoshgoftarmanesh mehran hoodaji majid afyuni

objective: returning crop residue to the soil exerts favorable effects on physical and chemical properties of soil. in fact, the plant residues can affect soil conditions such as ph and important role in soil fertility and cycling of elements in the soil may have. in addition to the role of the organic matter from decomposition of crop residue in increasing the concentration of micronutrients i...

Journal: :آب و خاک 0
امیر لکزیان اکرم حلاج نیا حدیثه رحمانی

abstract soil drying and rewetting (drw) cycles are considered as environmental stress that would affect the physical, chemical and biological properties of soil and nutrient cycles. the study of soil drying and rewetting effects on plant nutrition and soil fertility is very important and crucial specially their environmental effects. in this study, the effects of 1, 2, 3, 4 and 5 drying and re...

Journal: :international journal of environmental research 0
z.h. fan key laboratory of urban environment and health, institute of urban environment, chinese academy of sciences, xiamen 361021, china h.n. zhang key laboratory of urban environment and health, institute of urban environment, chinese academy of sciences, xiamen 361021, china b. liu xinyang normal university, xinyang 464000, china b. liu xinyang normal university, xinyang 464000, china d.d. zhang key laboratory of urban environment and health, institute of urban environment, chinese academy of sciences, xiamen 361021, china- school of environment and spatial informatics, china university of mining and technology, xuzhou 221116, china s. koner department of civil engineering, jalpaiguri government engineering college, jalpaiguri – 735102, india

dissolved organic nitrogen (don) can react with disinfectants to produce numerous disinfectionbyproducts (dbps), particularly nitrogen-containing dbps (n-dbps), and produce serious adverse effectson public health. widely used biological processes in drinking water treatment can increase don in effluents,and enhance these ill effects. this study investigated don in a full-scale two-stage ozonati...

Journal: :international journal of environmental research 2012
z.h. fan h.n. zhang x. xu b. liu d.d. zhang

dissolved organic nitrogen (don) can react with disinfectants to produce numerous disinfectionbyproducts (dbps), particularly nitrogen-containing dbps (n-dbps), and produce serious adverse effectson public health. widely used biological processes in drinking water treatment can increase don in effluents,and enhance these ill effects. this study investigated don in a full-scale two-stage ozonati...

2016
Ning Yang Dongsheng Zou Manyuan Yang Zhonggui Lin

Crust restoration is increasingly being done but we lack quantitative information on soil improvements. The study aimed to elucidate the dynamics involving soil microbial biomass carbon and soil dissolved organic carbon in the re-vegetation chronosequences of a hillslope land with purple soil in Hengyang, Hunan Province. The soil can cause serious disasters with both soil erosion and seasonal d...

2016
Michael Lawson David A. Polya Adrian J. Boyce Charlotte Bryant Christopher J. Ballentine

Biogeochemical processes that utilize dissolved organic carbon are widely thought to be responsible for the liberation of arsenic from sediments to shallow groundwater in south and southeast Asia. The accumulation of this known carcinogen to hazardously high concentrations has occurred in the primary source of drinking water in large parts of densely populated countries in this region. Both sur...

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