Open AccessUse of chestnut sheel (Castánea) as adsorption material for removing pollutants from natural and sewage waters: a review
Author(s) -
С. В. Свергузова,
И Г Шайхиев,
Е. В. Фомина,
R. Z. Galimova
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/945/1/012072
Subject(s) - sorption , adsorption , chemistry , metal ions in aqueous solution , aqueous solution , pollutant , lignin , shell (structure) , metal , environmental chemistry , chemical engineering , organic chemistry , materials science , composite material , engineering
The literature data on the use of grinded chestnut shells as a sorption material for removing heavy metal ions, dyes and some organic compounds from aqueous media are summarized. It is shown that a large number of publications are devoted to the study of the adsorption of ions of heavy metals with the shell of chestnut fruits. Information on the chemical composition of the chestnut shell is given. It was shown that the chestnut fruit contains cellulose, lignin and sugars in the shell most of all. It is indicated that the adsorption of many metal ions is carried out by functional groups that is a part of the biopolymers contained in the shell of chestnut fruits. It was revealed that the acidity of the medium influences the degree of extraction of metal ions from aqueous solutions, while the temperature has little effect on the sorption capacity of the shell of chestnut fruits. It is shown that it is possible to increase the sorption characteristics of pollutants by chemical modification of the chestnut shells. It has been determined that sorption isotherms in most cases are more fully described by the Langmuir model, and the kinetics of the process in all cases obeys the pseudo-second order model.