Waste water containing chromium ions(Cr~(6+)) 71 mg/L has been treated 60 minutes using the adsorbent containing promoter, the remained concentration of Cr~(6+) is lower than the release standard of goverment stipulate.
Tests were carried out for the treatment of chromium containing wastewater using a porous ferrous material made from concentrated breeze and ferric oxide. The result shows that when the particle size of the porous ferrous filter material is 1.45-2.00 mm,the pH value is 5-6 and the temperature is 20 ℃,the removal rate of Cr6+may reach 95%and that of total chromium may exceed 80%.
Deposit containing 11.1 wt% of chromium can be obtained using a current density of 25 A/dm2 at pH 2 .5. Chromium content increased by (2 - 3) wt% when 0.037 - 0.073 mol/L acetate was added into the bath.
It is generally recommended that the chromium-containing alloy blanks used to produce vacuum-tight glass-metal seals be previously annealed in humid hydrogen.
Cobalt- and Chromium-Containing Inclusions in Bacterial Cells
Bacteria belonging to different taxonomic and physiological groups (members of the genera Pseudomonas, Brevibacterium, Rhodopseudomonas, and Lactococcus) are able to form intracellular cobalt- and chromium-containing magnetic inclusions.
Electrochemical Regeneration of Polishing Electrolytes of Chromium-Containing Steels
A diaphragm-separated electrolysis method was used for regeneration of spent phosphoric-sulfuric acid solutions for electropolishing of chromium-containing steels (12Cr18Ni10Ti, 40Cr13, and others).
Evolution of C02 during the fixation of chromium containing wood preservatives on wood
Evolution of CO2 during the fixation of chromium containing wood preservatives on wood
CrO is an important intermediate in the high temperature oxidation chemistry of chromium containing species.
Chromium containing metallic glasses are studied by transmission57Fe M?ssbauer spectroscopy after neutron irradiation.
The plastic scintillator cannot be utilized for selective measurement of the soft X-rays emitted by 51Cr, hence, it does not allow us the estimation of the surface excess of chromium containing species on Pt electrode.
There were 17.1 wt-% of iron and 11.1 wt-% of chromium found on the coke surface detected by energy dispersive spectroscopy (EDS) which suggests carburetionon alloy.
The emission of chromium is influenced by the occurrence mode of Cr in coal.
The mutants varied in Cr(VI) resistance, the degree of chromium accumulation in the cells (from 0.1 to 11.6 mg/g dry cells), and the degree of Cr(VI) reduction (from 50% to complete disappearance of bichromate from the culture liquid).
Distribution of Chromium between the Forsterite Crystal and Melt as a Function of Crystal Growth and Doping Conditions
Polyvalent States of Chromium Ions in Silica Glasses Prepared by Plasma-Chemical Deposition