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Updated: Feb 11, 2026

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
Published on: May 2, 2025
Salinity and pH effects on floating and emergent macrophytes in a constructed wetland
H R Hadad1, M M Mufarrege2, G A Di Luca2
1Química Analítica, Instituto de Química Aplicada del Litoral (IQAL, UNL-CONICET), Facultad de Ingeniería Química, Universidad Nacional del Litoral (UNL)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Santiago del Estero 2829, Santa Fe (3000), Argentina E-mail: hadadhernan@gmail.com; Departamento de Ciencias Naturales, Facultad de Humanidades y Ciencias (FHUC, UNL), Paraje El Pozo, Santa Fe (3000), Argentina.
Abstract:
Salvinia herzogii, Pistia stratiotes and Eichhornia crassipes (floating species) were the dominant macrophytes in a constructed wetland (CW) over the first years of operation. Later, the emergent Typha domingensis displaced the floating species, becoming dominant. The industrial effluent treated at this CW showed high pH and salinity. The aim of this work was to study the tolerance of floating species and T. domingensis exposed to different pH and salinity treatments. Treatments at pH 8, 9, 10 and 11 and salinities of 2,000; 3,000; 4,000; 6,000; and 8,000 mg L-1 were performed. Floating macrophytes were unable to tolerate the studied pH and salinity ranges, while T. domingensis tolerated higher pH and salinity values. Many industrial effluents commonly show high pH and salinity. T. domingensis demonstrated to be a suitable macrophyte to treat this type of effluents.
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