نتایج جستجو برای: respectively by increasing concentration of heavy metals at 10 mglit

تعداد نتایج: 21905955  

Journal: Pollution 2018

A greenhouse experiment has been planned for this study to delineate the benefits of two types of rice husk biochars (namely B300 and B600 which are prepared at 300°C and 600°C, respectvely) and coal fly ash (CFA), as soil amendments, for decreasing the amount of some heavy metals (like Pb, Cd, Ni, Cr, and Cu) as well as mobility and phytoavailability in an artificially-calcareous multi-element...

A Adelkhah, F* Babaei Semiromi, S Alipour,

Background & objectives: Since many plants have high efficiency in absorbing heavy elements, the use of phytoremediation is of great importance. The purpose of this study is to identify native plants that absorb heavy metals. Also, the possibility of using them in phytoremediation technology in soils contaminated with heavy metals (around the petrochemical industry of Razi fertilizer in Tehran ...

A. Amirjanati M. Bagheri Tavani M. Norouzi, Sh. Ghodrati

This study was conducted to determine the concentration of five heavy metals, including lead, cadmium, mercury, arsenic, and chromium in muscle, liver and gills of the gray mullet, Liza aurata in southern part of the Caspian Sea. The samples were collected during sexual maturity (in the fall) and sexual rest (in the spring). The mean concentration of lead, cadmium, mercury, arsenic, and chromiu...

ژورنال: علوم آب و خاک 2012
عبدالمجید رونقی, , طیبه رحیمی‌, ,

Contamination of agricultural soils by heavy metals is a serious threat from both agricultural and environmental standpoints. Among heavy metals, cadmium (Cd) toxicity for humans and plants is of great concern due to its high mobility and phytoavailability in soil even at low concentrations. Opposite to Cd, Phosphorus (P) is an essential nutrient for plant growth. A greenhouse experiment was c...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

رحمانی, علیرضا, شیرزاد سیبنی, مهدی, صمدی, محمدتقی, نوروزی, رقیه,

Introduction & Objective: Industrial wastewaters including heavy metals, are one of the important sources of environmental pollution. Heavy metals such as chromium is found in plating wastewater and is harmful for human health and environment. The purpose of the present study was to investigate adsorption of hexavalent chromium Cr (VI) from aqueous solution onto commerical Iron powder as an e...

2009
Priti Bhardwaj Ashish K. Chaturvedi P. Prasad

Phaseolus vulgaris L. plants were grown in soil supplemented with different Pb and Cd concentrations (2, 4, 6, 8 gKg for Lead and 1.5, 2.0, 2.5, 3.0 gKg for Cadmium). Germination % was remained unaffected at low concentration of both metals as compared to control plants but at higher concentration of Cd i.e. 3g/Kg soil, germination was completely inhibited. Growth was also decreased as concentr...

ژورنال: اکوبیولوژی تالاب 2019
, ,

Sediments are one of the biological indicators of the accumulation of heavy metals in aquatic ecosystems, which, due to the stability of a region, can well measure pollution. This research was conducted in 2018 with the aim of investigating heavy metals of Cobalt, Chromium, Manganese, Selenium and Molybdenum in sediments of Hooralazim wetland in Khuzestan province. A total of 27 sediment sample...

Journal: :archives of hygiene sciences 0
masoud panahi fard department of environmental health engineering, health school, tehran university of medical science, tehran, iran amir hossien mahvi tehran university of medical science alireza asgari department of environmental health engineering, health school, tehran university of medical science, tehran, iran maryam moradnia department of environmental health engineering, health school, tehran university of medical science, tehran, iran

background & aims of the study: leachate production is a major problem for solid waste landfills and causes important threat to health public and environment. one of the typical properties of heavy metals is that they cannot easily decompose in the environment. the aim of this study was to measure of heavy metals concentrations in old-age leachate from qazvin landfill site, iran. materials & me...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده زبانهای خارجی 1389

abstract this study examines the effect of teaching lexical inferencing strategies on developing reading comprehension skill of iranian advanced efl learners. participants were female students of meraj and shokouh institudes of garmsar a quasi-experimental design using two intact advanced classes of efl students at meraj and shokouh institutes. as the first step, a general toefl proficiency te...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید