Work

Bioremediation of metals by Pestalotiopsis sp.: isolation, characterization, and evaluation of operational parameters

Year: 2025

Type: article

Abstract: Bioremediation employs microorganisms to remove metallic contaminants through physicochemical mechanisms. This study evaluated the biosorption of Cd²⁺, Cu²⁺, Pb²⁺, and Cr³⁺ ions by endophytic fungi of the genus Pestalotiopsis, isolated from tissues of Poaceae sp. grass. The effects of biomass concentration, contact time, and initial metal concentration on process efficiency were investigated. Increasing biomass reduced biosorption capacity, possibly due to biofilm formation that decreases the availability of active sites. Low initial concentrations favored removals above 98%, with emphasis on Cr³⁺ and Cu²⁺, which exhibited maximum biosorption capacities of 16.91 mg g⁻¹ and 11.71 mg g⁻¹, respectively. Adsorption followed the Langmuir model, indicating high affinity and monolayer adsorption, reaching equilibrium within 2 h and remaining stable up to 12 h. It was concluded that Pestalotiopsis sp. fungi are efficient and promising biosorbents for the removal of potentially toxic metals in effluents, representing a sustainable alternative for bioremediation.

Source: DELOS Desarrollo Local Sostenible

DOI: 10.55905/rdelosv18.n70-143

Authors: Joquebede Ferreira da Conceição, Áurea Catarine Brandão de Souza, Helayne Santos de Sousa, Jorge Diniz de Oliveira

Institutions: Universidade Estadual da Região Tocantina do Maranhão, Universidade Federal de Pernambuco

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: diamond

Funder: Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão