Adsorption and Desorption Characteristics of Vanadium (V) on Coexisting Humic Acid and Silica

Vanadium (V) has been progressively studied due to its potential toxicity in the environment as a trace metal. A coexistence system of humic acid (HA) and silica was employed to simulate the main organic and inorganic components of soil. The adsorption and desorption characteristics of V by the syst...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2020-09, Vol.231 (9), Article 460
Main Authors: Song, Qiao-yu, Liu, Meng, Lu, Juan, Liao, Yu-liang, Chen, Li, Yang, Jin-yan
Format: Article
Language:English
Subjects:
Adsorption
Atmospheric Protection/Air Quality Control/Air Pollution
Bioavailability
Chemical reactions
Climate Change/Climate Change Impacts
Coexistence
Computer simulation
Desorption
Earth and Environmental Science
Environment
Environmental conditions
Environmental monitoring
Exothermic reactions
Humic acid
Humic acids
Hydrogeology
Ionic strength
Ions
Silica
Silicon dioxide
Soil
Soil Science & Conservation
Soils
Thermal properties
Toxicity
Trace metals
Vanadium
Water Quality/Water Pollution
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Summary:Vanadium (V) has been progressively studied due to its potential toxicity in the environment as a trace metal. A coexistence system of humic acid (HA) and silica was employed to simulate the main organic and inorganic components of soil. The adsorption and desorption characteristics of V by the system and the effects of several environmental conditions were investigated. The adsorption data were well described by the Langmuir and Freundlich models, illustrating that the adsorption of V on HA + silica was a monolayer adsorption. The kinetic study indicated that the main adsorption controlling step was a chemical reaction. The thermodynamic study showed that the adsorption was exothermic and spontaneous. The adsorption-desorption process was strongly dependent on the solution pH and HA concentration, while temperature (4–75 °C) and ionic strength (
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-020-04839-w