EFFECT OF ORGANIC MATTER ON HEXAVALENT CHROMIUM REDUCTION BY NANO ZERO VALENT IRON IN SOIL
Journal Title: Azerbaijan Chemical Journal - Year 2019, Vol 0, Issue 2
Abstract
The experimental data are presented on lowering concentration of chrome(VI) ions in soil (with a purpose of rendering it harmless) by nanoparticles of iron in the presence of high concentration of an orga-nic compound (saccharase) as a reducing agent. The reiterated repetition experiments has proved an effectiveness of synthesized before iron nanoparticles. The basic parameters of an effective reduction of Сr(VI) by nanoparticles of iron have been found out. They are as follows: the time of reduction (2 h) and concentration of organic substances (35.71 g/kg of soil). It has been established that a rise in reduction duration above 2 h lowers its effectiveness. The cause of this, revealed by us, consists in that a high concentration of the organic compound provides for inhibitating of Cr(VI). It occurs on account of 1) adsorption of substance on a surface of iron nanoparticles and as a result the decrease in their active surface, 2) interaction of the organic compound with the products of the reduction reaction, 3) dissolution of saccharase in liquid phase. As result of investigation the necessity of determining the significance of high concentration of the organic substance for an effective reduction of Cr(VI) in soil is exposed. At present the work in this direction is being continued
Authors and Affiliations
G. R. Allahverdiyeva
Keywords
Related Articles
- EP ID EP629062
- DOI 10.32737/0005-2531-2019-2-11-14
- Views 120
- Downloads 0
SYNTHESIS AND TRANSFORMATIONS OF 3-R-1-CARBAMOIL-5-CHLOROMETHYLPYRAZOLES
As a result of the reaction between 3,4-dichloro-2-butene-1-ones and semicarbazide hydrochloride with natrium hydrocarbonate, the hydrazones of ketones are produced. When boiled with the pyridine within surrounding of th...
INFLUENCE OF VARIOUS FACTORS ON THE COMPOSITION OF ELECTRODEPOSITED THIN FILMS Mo–S
The work is devoted to the study of the influence of various factors – temperature, concentration of components in the electrolyte and current density on the composition of electrodeposited thin semiconductor Mo–S films....
SYNTHESIS AND ELECTROPHYSICAL PROPERTIES OF SOLID SOLUTIONS (SnTe)1-x (Ag2Te)x (x = 0.01, 0.02, 0.05)
By the methods of physicochemical analysis (DTA, RFA, MSA, as well as measurement of microhardness and density) was investigated the nature of the chemical interaction in the system (SnTe)1-x(Ag2Te)x (x=0.01, 0.02, 0.05)...
THE PHASE DIAGRAM OF THE SYSTEM Tl‒Te‒I IN THE COMPOSITIONAL RANGE OF TlI‒Tl2TeI6‒Te
The phase equilibria in the system Tl‒Te‒I in the compositional range of TlI‒Tl2TeI6‒Te were investigated by using methods differential thermal analysis and X-ray analysis. A series of polythermal sections, as well as, a...
SEPARATION OF CADMIUM BY CHELATING POLIMERIC SORBENTS AND APPLYING PRECONCENTRATION
Copolymer of maleic anhydride with styrene is modified and two new chelating sorbents are synthesized. These sorbents contains fragments of m-phenilendiamine (S1) and diaminobenzidine (S2). The sorption conditions of cad...