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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hausmannite as potential As(V) filter. Macroscopic and spectroscopic study of As(V) adsorption and desorption by citric acid

Full text
Author(s):
Barreto, Matheus Sampaio C. [1, 2] ; Elzinga, Evert J. [2] ; Alleoni, Luis Reynaldo F. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, Piracicaba, SP - Brazil
[2] Rutgers State Univ, Dept Earth & Environm Sci, Newark, NJ - USA
Total Affiliations: 2
Document type: Journal article
Source: Environmental Pollution; v. 262, JUL 2020.
Web of Science Citations: 0
Abstract

Arsenic (As) is a toxic element that leads the list of human health threats and is one of the priority contaminants in soil and water. In order to remove As(V) and/or reduce its mobility, filters and amendments with high affinity for As(V) adsorption are used in drinking water treatment or directly applied to the soil, thereby promoting its immobilization. Hausmannite and hematite were compared by in-situ Attenuated Total Reflection - Fourier Transform Infrared (ATR-FTIR) spectroscopy and batch experiments for evaluating As(V) adsorption and sequential desorption by citrate. The pH and contact time were used as variables. Hausmanite adsorbed more As(V) than hematite. As(V) was adsorbed on the mineral surface of simultaneously inner- and outer-sphere species. Inner-sphere bidentate complex form preferentially at high pH, early adsorption time and low surface loading, while the monodentate species should be responsible to increase total As(V) adsorption at low pH, later adsorption kinetics and higher As(V) surface loading. Citrate was effective in causing As(V) desorption at higher citric acid concentrations and higher pH values. After a long time of incubation, the neogenesis of a manganite by hausm-nannite oxidation was observed. Concomitantly, less As(V) was desorbed by citrate desorption, even in the presence of high citric acid concentrations. Hausmannite was an efficient mineral for As(V) removal and immobilization. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 16/05870-1 - SPCIATION AND KINETIC ADSORPTION AND DESORPTION OF Cd AND Zn IN SOILS OF OLERACEUS CROPS HIGHLY FERTILIZER
Grantee:Matheus Sampaio Carneiro Barreto
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/22058-9 - Adsorption and desorption of Cd and Zn in highly fertilized tropical soils
Grantee:Matheus Sampaio Carneiro Barreto
Support Opportunities: Scholarships abroad - Research Internship - Doctorate