Establishing the state-of-the-art on the adsorption of coexisting pnictogens in water: A literature review

• Type: Another Publication in an International Scientific Journal
• Date: 2022

Authors

Ariana Pintor (Author) FEUP; Tomasi, IT (Author) Other; Boaventura, RAR (Author) Other; Cidália Botelho (Author) FEUP

Journal

Title: Chemosphere

Vol. 286

ISSN: 0045-6535

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 0 Citations

Other information

Authenticus ID: P-00V-A0K

DOI: 10.1016/j.chemosphere.2021.131947

Abstract (EN): The occurrence of pnictogens, namely phosphorus, arsenic, and antimony, can be observed in soils, sediments and mining areas, and their coexistence requires a multifaceted approach to the design of adsorption systems to maximize their simultaneous removal efficiency. Therefore, this work aims to provide an extensive literature review of P, As, and Sb adsorption in multicomponent systems and the statistical treatment of the quantitative results. Binary As-P systems have been the most studied in the literature. The oxidation state did not significantly affect the P influence in As adsorbed amount (p = 0.955), but this influence was correlated with the As:P ratio (p < 0.05). A few works have explored As-Sb and Sb-P systems, demonstrating that effective treatments for As do not always reveal a good removal efficiency of the other pnictogens. The Sb adsorbed amount was significantly less affected in the trivalent than in the pentavalent state in both As-Sb and Sb-P systems (p < 0.05). Most of the interactions were competitive, with a few studies reporting synergistic effects for Sb due to the presence of the other elements. Many topics have been identified as lacking in-depth research: ternary As-Sb-P systems, the effect of con-centration ratios, pH, and redox conditions (namely those that lead to trivalent species' prevalence), the surface interactions with materials other than iron oxides, and the influence of other aqueous components. This review provides a first step in gathering the relevant literature and approaching the study of adsorption treatment methodology as a complex subject involving many factors.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17