Adsorption of Cr (III) Ions on the Surface of Diatomite

Sagdat Mederbekovna Tazhibayeva, Amir Alzhanov, Kuanyshbek Bituovich Musabekov, Kairat Zhalishev

2015

Full text Open access: Hybrid Metadata (CSL-JSON)

DOI 10.4028/www.scientific.net/amm.749.41

Data confidence 70 medium

How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

The conditions of adsorption of Cr3 + ions at the surface of diatomite are optimized. It was shown that the adsorption of Cr3 + ions on diatomite depending on the initial concentration is 1,8-6,9 mg /g, which is caused by the occurrence of the ion exchange reaction between the silanol groups of diatomite and Cr (III) ions. The effect of pH on the binding of Cr3 + ions with diatomite was studied. It was established that acidification of the medium leads to a decrease in the degree of extraction of Cr3 + ions from solutions, due to protonation of SiOH-groups of the diatomite surface with H + ions of acids to SiOH2+. It is suggested that, along with the adsorption of Cr3 + ions on the surface of diatomite heterocoagulation of diatomite particles and hydroxocomplexes of Cr3 + ions is possible.