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Exploring the Phytoremediation Capability of Athyrium filix-femina, Ludwigia peruviana and Sphagneticola trilobata for Heavy Metal Contamination

Aveiga Ana, Banchón Carlos, Sabando Roxanna, Delgado María

Journal of Ecological Engineering

2023

Vol. 24, nr 7

165--174

Heavy metals are one of the leading environmental pollutants that are hazardous to the health of humans, soils, plants, and aquatic life. This study investigated the potential of Athyrium filix-femina, Ludwigia peruviana, and Sphagneticola trilobata for phytoextraction of Al, Ag, Cd, Cr, Ga, and Sr. To evaluate the heavy metal uptake by the plants, a pot experiment was conducted using uncontaminated soil mixed with a heavy metal solution. At the end of thirty days of planting, the bioconcentration and translocation factors were calculated. Cd accumulated to a greater degree in the shoots of A. filix-femina and L. peruviana than in their roots (8% and 12% respectively). Conversely, S. trilobata accumulated 27% more Cd in its roots than in its shoots. In all three plant species, roots had significantly higher heavy metal concentrations than shoots. These findings demonstrate that L. peruviana, A. filix-femina, and S. trilobata have high potential for phytoextraction and bioaccumulation of Cd, Sr, Ag, and Ga. The herbaceous nature of these plants, coupled with their deep roots and rapid growth rates, make them promising candidates for phytoremediation in heavy metal-contaminated soils.

Airborne Bacteria from Wastewater Treatment and Their Antibiotic Resistance: A Meta-Analysis

Banchón Carlos, Vivas Teresa, Aveiga Ana, Díaz Linda

Journal of Ecological Engineering

2021

Vol. 22, nr 10

205--214

The treatment of domestic and industrial wastewater is a source for a large number of airborne microorganisms, which can be released at the environment during mechanical aeration. A meta-analysis of up to 14 industrial and municipal treatment plants was performed to determine the bacterial count in bioaerosols, as well as antibiotic resistance, at different stages of the wastewater treatment (pretreatment, primary, secondary and tertiary treatment), in comparison with bacterial counts of the ambient air surrounding the treatment plants. The highest contamination of the air with microorganisms was observed in the raw sewage inlet and at the biological reactor. In most analyzes, the air in the wastewater treatment plant was characterized by a higher content of microorganisms than at the control point. Bioaerosols from water treatment might be an important source of antibiotic resistance genes, which can be transported considerable distances and can represent a potential risk to humans. Therefore, employees should recognize the health risks associated with the absence of personal protective equipment, such as masks or respirators.