The Removal of Arsenic and Its Inorganic Forms from Marine Algae-A Base for Inexpensive and Efficient Fertilizers

Jarosław Ostrowski; Alicja Drozd; Rafał Olchowski; Agnieszka Chałabis-Mazurek; Andrzej Sienkiewicz; Agnieszka Kierys; Kinga Morlo; Ryszard Dobrowolski

doi:10.3390/molecules29061348

The Removal of Arsenic and Its Inorganic Forms from Marine Algae-A Base for Inexpensive and Efficient Fertilizers

Molecules. 2024 Mar 18;29(6):1348. doi: 10.3390/molecules29061348.

Authors

Jarosław Ostrowski¹, Alicja Drozd¹, Rafał Olchowski², Agnieszka Chałabis-Mazurek², Andrzej Sienkiewicz³, Agnieszka Kierys³, Kinga Morlo⁴, Ryszard Dobrowolski⁴

Affiliations

¹ Łukasiewicz Research Network, New Chemical Syntheses Institute, Tysiąclecia Państwa Polskiego Av. 13a, 24-110 Puławy, Poland.
² Department of Pharmacology, Toxicology and Environmental Protection, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka Sq. 12, 20-950 Lublin, Poland.
³ Department of Physical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. C. Sklodowska Sq. 3, 20-031 Lublin, Poland.
⁴ Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. C. Sklodowska Sq. 3, 20-031 Lublin, Poland.

Abstract

Newly synthesized cerium oxide was successfully obtained by the hard templating route. The optimal As(III) and As(V) adsorption onto the studied adsorbent was reached for the initial pH of 4.0 and a contact time of 10 h. The highest static adsorption capacities for As(III) and As(V) were 92 mg g^-1 and 66 mg g^-1, respectively. The pseudo-second-order model was well fitted to the As(III) and As(V) experimental kinetics data. The Langmuir model described the As(III) and As(V) adsorption isotherms on synthesized material. The adsorption mechanism of the studied ions onto the synthesized cerium oxide was complex and should be further investigated. The optimal solid-liquid ratio during the proposed aqueous extraction of inorganic As from the Fucus vesiculosus algae was 1:50. The optimal dosage of the synthesized cerium oxide (0.06 g L^-1) was successfully applied for the first time for inorganic As removal from the aqueous algal extract.

Keywords: As; adsorption; brown seaweed; cerium oxide; water extraction.

Grants and funding

This research received no external funding.