Open AccessAnalysis of kinetic and equilibrium adsorption of heavy metals by natural materials
Author(s) -
О. В. Салищева,
Yu. V. Tarasova,
S. S. Lashitskiy,
Н. Е. Молдагулова
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/640/6/062007
Subject(s) - husk , adsorption , metal ions in aqueous solution , chemistry , extraction (chemistry) , raw material , aqueous solution , metal , activated carbon , carbon fibers , nuclear chemistry , materials science , chromatography , organic chemistry , botany , composite material , composite number , biology
One of the effective methods of cleaning up water is an adsorption method. The adsorption treatment is effectively used as a post-treatment after using treatment chemicals precipitators. You can use natural porous carbon-containing materials as obtained sorbents, as industrial waste, or cheap carbon raw modified by humans: ash, fines coconut, peat, activated carbon, active clay, bio- and phyto-sorbents, agricultural wastes (rice, barley, wheat husk, nutshells, bagasse, etc.). In this regard, there is a question of finding cheap natural sorbents with a high adsorption capacity. In this article we studied the regularity of extraction of heavy metal cations Cu 2+ , Co 3+ , Ni 2+ , Fe 3+ from aqueous solutions, using natural sorbents: husk cedar cones, pine nut meal, walnut partitions, pectin. Constancy of the concentration of heavy metal ions in the solution corresponds to the time of adsorption equilibrium (from 10 to 40 minutes). High adsorption capacity with respect to heavy metal ions showed pectin and proteinaceous materials. It is shown that the adsorption capacity of natural raw materials in relation to heavy metal ions increases by 20-30% due to modification of the surface of biosorbents. The degree of metals extraction from solution using a composition based on a peel cedar cones and pectin increases by 20-30% in comparison with pure husk of a cedar cone. According to the degree of extraction from the aqueous solution, metal ions are arranged in the row Fe 3+ >Co 3+ >Ni 2+ >Cu 2+ .