نتایج جستجو برای: leaching solution

تعداد نتایج: 473252  

2000
J. Eriksen

Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. Sulphate leaching and S balances were investigated in an organic dairy/crop rotation (barley [Hordeum vulgare] → grass-clover [Lolium perenne/Trifolium repens] → grass-clover → barley/pea [Pisum arvénse] → winter wheat [Tritucum aestivum] → fodder beet [Beta vulgaris]...

Journal: :iranian journal of chemistry and chemical engineering 0
guoqiang xiang school of chemistry and chemical engineering, henan university of technology. zhengzhou, 450001, p.r. china yule wang school of food science and technology, henan university of technology. zhengzhou, 450001, p.r. china heng zhang school of chemistry and chemical engineering, henan university of technology. zhengzhou, 450001, p.r. china huanhuan fan school of chemistry and chemical engineering, henan university of technology. zhengzhou, 450001, p.r. china xiuming jiang school of chemistry and chemical engineering, henan university of technology. zhengzhou, 450001, p.r. china lijun he school of chemistry and chemical engineering, henan university of technology. zhengzhou, 450001, p.r. china lu fan

a novel, magnetic silica sorbent with polyelectrolyte multilayers (pems) on its surface was prepared, and was used for magnetic solid phase extraction (mspe) of trace a+ via flame atomic absorption spectrometry (faas). the experimental parameters for the mspe procedure, such as the ph, type, and concentration of eluent, ultrasonic time and effects of co-existing ions were investigated. the dete...

2013
Jinman Wang Zhongke Bai Peiling Yang

The byproducts of flue gas desulfurization (BFGD) are a useful external source of Ca(2+) for the reclamation of sodic soils because they are comparatively cheap, generally available and have high gypsum content. The ion solution composition of sodic soils also plays an important role in the reclamation process. The effect of BFGD on the soluble salts composition and chemical properties of sodic...

2013
Ana Alvarez Pampliega

Aluminium additions to metallic coatings on steel substrates have been accepted as a successful solution versus the standard zinc based coatings. The development of these products responds to the market’s demand of more versatile products, which faces the leaching effect of zinc and the rising cost of obtaining this element, among the main advantages. However, these materials show a special sen...

ژورنال: علوم آب و خاک 2013
سید مجید میرلطیفی, , ملیحه ربیع, , مهدی قیصری, ,

Nitrate leaching from agricultural lands can pollute groundwater, and the degree of pollution caused significantly depends on agricultural practices implemented on farms. Field studies required to evaluate the effects of various agricultural management strategies on nitrate leaching are expensive and time consuming. As a result, it is suggested to use crop models to simulate the effects of mana...

Journal: :journal of agricultural science and technology 2011
a. samadi

solution potassium (so-k) and exchangeable k (ex-k) extracted by nh4oac are the major sources of potassium used by plants, but initially non-exchangeable k (nex-k) can also contribute significantly to plant uptake. perennial ryegrass (lolium perenne, cv. roper) was successively planted in ten surface soil samples with different clay mineralogical composition belonging to five soil types to dete...

Journal: :Applied and environmental microbiology 1997
P I Harvey F K Crundwell

The concentrations of ferrous and ferric ions change dramatically during the course of the batch experiments usually performed to study the kinetics of the bacterial oxidation of ferrous ions and sulfide minerals. This change in concentration of the iron species during the course of the experiment often makes it difficult to interpret the results of these experiments, as is evidenced by the lac...

2014
Jun Liu Kaifeng Tang Qiwen Qiu Dong Pan Zongru Lei Feng Xing

In this paper, the pore structure characterization of concrete exposed to deionised water and 5% NaCl solution was evaluated using mercury intrusion porosity (MIP), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effects of calcium leaching, fly ash incorporation, and chloride ions on the evolution of pore structure characteristics were investigated. The results demonstrate ...

2012
Ricardo Montero Alicia Guevara Ernesto de la Torre

Nowadays, over 300 tons of Au are used in electronic equipment each year with other precious and strategic metals such as Ag, Pt, Pd, Cu, Nb, Ta, etc.. After the use-phase, the electronic devices become electronic waste (e-waste); consequently it is important to consider e-waste as a secondary supply for the recovery of these metals. This paper presents the recovery of Au, Ag, Cu and Nb from PC...

2005
N. Finžgar B. Kos D. Leštan

The risk of Pb contaminated soil after treatment with different remediation techniques was assessed. Soil vitrification (microwaves) reduced Pb orally available from the stomach and intestinal phase measured by a physiologically based extraction test. Solidification of Pb (Slovakite) did not reduce the concentration of orally available Pb and increased the Pb uptake by Thlaspi goesingens for 2-...

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