Adsorption of arsenic (V) from aqueous solution using modified saxaul ash: isotherm and thermodynamic study

Recently, arsenic-contaminated water has become a big concern. Therefore, the present study aimed to absorb arsenic from the aqueous solution using modified saxaul tree ash. Arsenic adsorption process was performed in vitro by investigating the effect of various parameters such as pH, contact time,...

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Bibliographic Details
Published in:Applied water science 2019-06, Vol.9 (4), p.1-9, Article 87
Main Authors: Rahdar, Somayeh, Taghavi, Mahmoud, Khaksefidi, Razieh, Ahmadi, Shahin
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aquatic Pollution
Aqueous solution
Aqueous solutions
Arsenic
Arsenic (V)
Arsenic ions
Ashes
Comparative Law
Dosage
Earth and Environmental Science
Earth Sciences
Hydrogeology
Industrial and Production Engineering
International & Foreign Law
Isotherm
Isotherms
Kinetics
Nanotechnology
Original Article
pH effects
Pollutant removal
Private International Law
Temperature effects
Thermodynamic
Waste Water Technology
Water Industry/Water Technologies
Water Management
Water pollution
Water Pollution Control
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Summary:Recently, arsenic-contaminated water has become a big concern. Therefore, the present study aimed to absorb arsenic from the aqueous solution using modified saxaul tree ash. Arsenic adsorption process was performed in vitro by investigating the effect of various parameters such as pH, contact time, arsenic concentrations, temperature and adsorbent dosage on the adsorption efficiency. Isotherms, kinetics and thermodynamic studies were also conducted to better understand the process of adsorption. Maximum level of arsenic adsorption was obtained at a pH of 7, adsorbent dosage of 1.5 g/L, contact time of 60 min, initial arsenic concentration of 250 µg/l and temperature of 323 K. The amount of adsorbed arsenic was increased with increasing initial concentration of arsenic and temperature. Freundlich adsorption isotherm clearly described the arsenic adsorption by modified saxaul ash. Based on the results obtained, it could be concluded that the modified saxaul ash can efficiently remove arsenic from its aqueous solutions.
ISSN:2190-5487
2190-5495
DOI:10.1007/s13201-019-0974-0