Relationship of Photosynthetic Activity of Polygonum acuminatum and Ludwigia lagunae with Physicochemical Aspects of Greywater in a Zero-Liquid Discharge System

Karen Takahashi, Gabriela Araújo, Vali Pott, Nídia Yoshida, Liana Lima, Anderson Caires and Paula Paulo ()
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Karen Takahashi: Faculty of Engineering, Architecture and Urbanism, and Geography, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Gabriela Araújo: Faculty of Engineering, Architecture and Urbanism, and Geography, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Vali Pott: Bioscience Institute, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Nídia Yoshida: Chemistry Institute, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Liana Lima: Bioscience Institute, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Anderson Caires: Physics Institute, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil
Paula Paulo: Faculty of Engineering, Architecture and Urbanism, and Geography, Federal University of Mato Grosso do Sul, Campo Grande 79090-900, MS, Brazil

Resources, 2022, vol. 11, issue 10, 1-16

Abstract: Landscape harmony is a key factor in the application of nature-based solutions to provide green areas. The search for plants that meet this requirement is crucial in this context. We evaluated the adaptation, resistance, and performance of Polygonum acuminatum and Ludwigia lagunae , macrophytes from the Pantanal biome, in greywater-fed mesocosms simulating zero-liquid discharge systems. Four irrigation solutions were tested for 212 d. Neither species exhibited stress conditions in the adaptation phase, with photosynthetic activity ( Fv / Fm) close to that obtained in Pantanal. However, over time, the mesocosms irrigated with greywater (GW) without nutrient supplementation exhibited stress according to correlation analyses of photosystem PSII and physicochemical parameters; L. lagunae for dissolved oxygen below 3 mg L −1 and P. acuminatum for water temperatures above 27 °C. Supplementation of GW with nutrients resulted in good growth and performance. Both species were able to receive high chemical oxygen demand (COD) loads, averaging 34 g m −2 day −1 for L. lagunae and 11 g m −2 day −1 for P. acuminatum , with an average removal of 85% by both. L. lagunae had better evapotranspiration capacity, with greater potential for use in cooling islands, whereas P. acuminatum showed a more resistant metabolism without nutrient supplementation.

Keywords: constructed wetlands; domestic sewage; heat islands; photosynthetic activity; water reuse (search for similar items in EconPapers)
JEL-codes: Q1 Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2022
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