The proton binding properties of biosorbents.

Lodeiro, Pablo , Martinez-Cabanas, Maria, Herrero, Roberto, Barriada, José L., Vilariño, Teresa, Rodríguez-Barro, Pilar and Sastre de Vicente, Manuel E. (2019) The proton binding properties of biosorbents. Environmental Chemistry Letters, 17 (3). pp. 1281-1298. DOI 10.1007/s10311-019-00883-z.

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A broad variety of materials of biological origin have been successfully used in recent decades for the removal of pollutants from waters. These biosorbents include natural polymers that play a key role for adsorption. It is therefore critical to understand the physicochemical properties of the chemical groups of these biopolymers. The acid–base properties of biomass are affected by pH, ionic strength and medium composition. Nevertheless, these parameters are not always considered during biosorption studies. According to the literature, less than 3% of biosorption reports include studies on proton binding. Moreover, in 60% of these papers, there is key experimental information missing such as the calibration of the electrodes employed for potentiometric titrations. We consider therefore that there is an important need for reviewing the role of proton binding in biosorption studies. This review outlines the major advances on data interpretation and modelling of proton binding on biosorbents. In addition, we discuss issues concerning the acid–base properties of biosorbents.

Document Type: Article
Keywords: Biosorption · Proton binding · Master curve · Electrostatics and non-electrostatic effects · Hofmeister series
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s10311-019-00883-z
ISSN: 1610-3653
Date Deposited: 24 Apr 2019 12:51
Last Modified: 06 Feb 2020 09:13

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