【摘 要】
：
Multistage sequential extraction with different sequences was applied to extracting natural surface coatings(NSCs),and the results were compared with those by s
【机 构】
：
Key Laboratory of Groundwater Resources and Environment
论文部分内容阅读
Multistage sequential extraction with different sequences was applied to extracting natural surface coatings(NSCs),and the results were compared with those by single stage extraction technique.The optimal sequential extraction scheme with the best performance was selected and incorporated into the method of selective extraction followed by adsorption and statistic analyses to study the adsorption parameters of Fe oxides,Mn oxides and organic matters in NSCs for Pb and Cd,to validate the applicability of the sequential extraction scheme.The Langmuir adsorption parameters of each component of surface coating estimated according to the adsorption data of single stage extraction of NSCs were all similar to those of sequential extraction of NSCs,and the maximum difference between the metal adsorption abilities of the components estimated via the two extraction techniques was only about 20％,indicating that either extraction techniques could be used.The optimal sequential extraction scheme obtained was first extracted with NH2OH·HCl,then with Na2S2O4,and finally with oxalic acid.
其他文献
This article is a short introduction to the surprising appearance of Burgers equation in some basic probabilistic models.
Two new energetic compounds (AIM)(HTNR) and (AIM)(PA)(AIM=2-azidoimidazole,TNR=2,4,6-trinitroresorcinol,PA=picric acid) have been prepared by AIM(2-azidoimidazo
Tomato systemin is a bioactive peptide that regulates the systemic activation of wound-responsive genes.It is released from its 200 amino acid precursor called
Thalidomide treats multiple myeloma and protracts life-span of patient,but its bioavailability is limited as it is poorly water soluble.Thalidomide nano-flakes
A simple and efficient catalytic protocol for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes via the one-pot condensation of β-naphthol and aryl aldehydes
The present research focuses on experimentally clarifying the effect of inner-tank sloshing on the hydrodynamics of an Floating Liquefied Natural Gas (FLNG) sys
Nickel modified NiOOH electrodes were used for the electrocatalytic oxidation of ethanol in alkaline so lutions. The electro-oxidation of ethanol in a 1 mol/L N
We investigate the vacuum in noniscntropic gas dynamics in one space variable,with the most general equation of states allowed by thermodynamics. Wc recall phys
In this article,the Non-Aqueous Phase Liquid (NAPL) transport in the single filled fracture was studied with the Shan-Chen multi-component multiphase Lattice Bo
The crystallization of uniaxial hot drawn syndiotactic polystyrene/multi-walled carbon nanotube (sPS/MWCNT) nanocomposite films was studied by FTIR spectroscopy