Use of peat-based sorbents for removal of arsenic compounds

• Autorzy: Linda Ansone , Maris Klavins , Linda Eglite
• Języki publikacji: EN

Abstrakty

EN

It is important to apply sorbent materials for purification of water from arsenic contamination due to serious arsenic pollution worldwide. We have developed new sorbents based on natural materials that provide a cheap and environmentally friendly alternative. For the first time, peat modified with iron compounds and iron humates were tested for sorption of arsenic compounds. The highest sorption capacity was found in peat modified with iron compounds. We have found that sorption of different arsenic speciation forms was strongly dependent on solution pH, reaction time and temperature. Calculations of the sorption process using thermodynamic parameters indicate the spontaneity of sorption process and its endothermic nature. Sorption kinetics showed that most arsenates are removed within 2 hours, and the kinetics of arsenate sorption on modified peat can be described by the pseudo-second order mechanism. [...]

Słowa kluczowe

EN

Peat; Iron humates; Arsenic; Sorption; Sorption model

• Czasopismo: Open Chemistry
• Rocznik: 2013
• Tom: 11
• Numer: 6
• Strony: 988-1000

Daty

wydano

2013-06-01

online

2013-03-28

Twórcy

autor

Linda Ansone

• Department of Environmental Science, University of Latvia, Riga LV, 1586, Latvia,

autor

Maris Klavins

• Department of Environmental Science, University of Latvia, Riga LV, 1586, Latvia,

autor

Linda Eglite

• Department of Environmental Science, University of Latvia, Riga LV, 1586, Latvia,

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Identyfikatory

DOI

10.2478/s11532-013-0229-0