• Cd and Pb in the soil samples under Lepidium meyenii (maca) cultivation exceeded the allowed limit. • Levels of Pb and Cd concentrations in yellow and purple maca hypocotyls were above the allowed limits. • Estimated daily intake of As, Cd, Pb, Fe and Zn were within the allowed limit. • Hazard quotient and hazard index values of As, Cd, Pb, Fe and Zn were less than one. • The consumption of maca hypocotyls in children and adults could pose a significant health risk for consumers.

The research sought to evaluate the normalized difference vegetation index (NDVI) of the study area located in the province of Tayacaja, which includes the districts of Acraquia, Ahuaycha, Pampas and Daniel Hernández, which is part of the central Andes of Peru. The data were collected in low...

The increasing scarcity of water resources has driven the need for innovative solutions for wastewater reclamation using different nanomaterials. The purpose of the research was to establish the progress of wastewater remediation using functionalized metallic and semiconductor nanomaterials. A...

The objective of the study was to establish the configuration of the system model to allow the effective recovery of gray water by solar photocatalysis with TiO2 nanoparticles for irrigation of crops. A programmable solar photoreactor based on an S7 1500 PLC and online measurement sensors were...

Wastewater treatment through phytoremediation with plants reduces contaminants to acceptable levels as established by the Environmental Quality Standards (EQS) of Peru. This study evaluated the efficiency of Azolla filiculoides Lam. plants from the Huayllaspanca Colored Wetland (Laguna Coloreado) in the phytoremediation of wastewater from Huamancaca Chico, Chupaca Province, Junín Region, Peru. A pre-test and post-test experimental design was used. Glass aquariums of dimensions 54 × 20 × 21.3 cm were set up, and 28 g of phytoremediation plant samples were planted in 20 L of wastewater over a 28-day period. The main results for contaminant removal efficiency were as follows: clear and odorless water, total dissolved solids (40.27%), electrical conductivity (41.07%), turbidity 98.51%, oils and greases (>90.7%), BOD₅ (95.55%), COD (95.04%), and ammonia nitrogen (95.77%). The final removal of fecal coliforms and Escherichia coli from wastewater using A. filiculoides was 99.9%, with post-treatment averages (11.6 MPN/100 mL and 2 MPN/100 mL, respectively) significantly lower than their respective Environmental Quality Standards (EQS) (1000 MPN/100 mL) (p < 0.05). In conclusion, Azolla filiculoides Lam. is an effective macrophyte for improving the physical, chemical, and microbiological parameters of wastewater and removes contaminants.