Determining the efficiency of carbonaceous adsorbents in removing chromium (VI) from aqueous solution
The increase of various industries and the growth of the earth's population have caused various types of contamination in the environment. Anionic contaminants are one of the most important contaminants in water, which have many risks to human health and living organisms and also have many im...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
Water and Wastewater Consulting Engineers
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/107271/ https://www.wwjournal.ir/article_176534.html?lang=en |
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| Institution: | Universiti Putra Malaysia |
| Summary: | The increase of various industries and the growth of the earth's population have caused various types of
contamination in the environment. Anionic contaminants are one of the most important contaminants in
water, which have many risks to human health and living organisms and also have many important
environmental risks. Therefore, it is important to modify these resources. Studies showed that the use of
biochar and metal-coated biochar effectively leads to the removal of a significant amount of contaminants
from water and soil, but so far, the effect of carbon-metal composite on the removal of contaminants,
especially anionic contaminants, has not been comprehensively investigated. In this research, the effect of
biochar, metal-coated biochar and biochar-metal composite on the removal of chromium from water was
investigated. Metal-coated biochars and various biochar-metal composites were prepared from the
combination of metals (copper, iron and aluminum) with agricultural residues (rice straw) in raw form or
as a biochar. The samples included Biochar, Copper-coated biochar, Aluminum-coated biochar, Ironcoated biochar, Copper composite, Aluminum composite, and Iron composite. In the first stage, the
optimal conditions for contaminant removal were investigated, then an optimal amount of adsorbents and
contaminant with a concentration of 20 mg/L and pH=6 were combined and shaken for three hours. until
they reached equilibrium. After centrifugation and filtration, the final concentration of the contaminant
was read and the chromium removal percentage was calculated. The results of the present research
showed that the application of iron composite and iron-coated biochar could remove 90.32 and 93.71
percent of chromium pollutant from the aqueous solution, respectively. Therefore, the use of these
adsorbents can remediate chromium-contaminated water. |
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