Kinetic and thermodynamic studies on biosorption of Cr(VI) on raw and chemically modified Datura stramonium fruit

Biosorption of Cr(VI) on sulfuric and phosphoric acid-treated Datura stramonium fruit was investigated in batch mode. The various parameters that influence the biosorption process such as Cr(VI) initial concentration, biosorbent dosage, contact time, temperature, and pH value were optimized. Both linear and non-linear regression analysis of isotherm data suggest that Langmuir isotherm model mimics the behavior of Cr(VI) ion biosorption onto Datura stramonium fruit biosorbent. The maximum Cr(VI) ions adsorption capacity of 138.074 mg/g at pH 2 is achieved with phosphoric acid treated Datura stramonium (PDSF). The kinetics of adsorption process is well described by pseudo-second-order model with high R2 and low χ2 value. The estimated activation energy of < 8 kJ/mol obtained for both raw and chemically modified adsorbents suggests that the adsorption occurs mainly via physisorption. Besides, thermodynamic results reveal that biosorption of Cr(VI) on both treated and untreated Datura stramonium was endothermic, spontaneous, and randomness in nature.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:192

Enthalten in:

Environmental monitoring and assessment - 192(2020), 4 vom: 23. März, Seite 248

Sprache:

Englisch

Beteiligte Personen:

Kumar, Shravan [VerfasserIn]
Shahnaz, Tasrin [VerfasserIn]
Selvaraju, N [VerfasserIn]
Rajaraman, Prasanna Venkatesh [VerfasserIn]

Links:

Volltext

Themen:

0R0008Q3JB
18540-29-9
Biosorption
Chromium
Chromium (VI)
Chromium hexavalent ion
Datura stramonium
Journal Article
Kinetics
Physico-chemical
Thermodynamics
Water Pollutants, Chemical

Anmerkungen:

Date Completed 26.03.2020

Date Revised 24.04.2020

published: Electronic

Citation Status MEDLINE

doi:

10.1007/s10661-020-8181-x

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM307929558