Effect of produced water treatment technologies on irrigation-induced metal and salt accumulation in wheat (Triticum aestivum) and sunflower (Helianthus annuus).

Autor: Sedlacko EM; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA., Chaparro JM; Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA., Heuberger AL; Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA., Cath TY; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA., Higgins CP; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA. Electronic address: chiggins@mines.edu.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2020 Oct 20; Vol. 740, pp. 140003. Date of Electronic Publication: 2020 Jun 06.
DOI: 10.1016/j.scitotenv.2020.140003
Abstrakt: Produced water (PW), a wastewater resulting from hydraulic fracturing and oil and gas production, has been utilized in arid regions for irrigation purposes and potentially presents a new water source for crop irrigation in areas of increasing water scarcity. However, there is a potential for both synthetic and geogenic contaminants in these waters to accumulate in irrigated food crops. This study assessed how water treatment technologies targeted at removal of salinity (i.e., total dissolved solids) and organic chemical content (i.e., dissolved organic carbon) from PW to achieve agricultural irrigation standards altered the impact of inorganic contaminants and nutrient uptake on two salt-tolerant food crops, sunflower (Helianthus annuus) and wheat (Triticum aestivum). The impacts of the treatment technologies on inorganic contaminant loadings in the irrigated soils were also assessed. Treatment technologies to improve PW quality decreased the adverse impacts on plant health; however, plant health was more affected by dilutions of PW than by the treatment technologies employed. Phenotypically, plants irrigated with 90% dilution (low) treatment groups, regardless of treatment technology, were comparable to controls; however, plants watered with high proportions (50%) of raw or treated PW displayed stunted growth, with reduced height and leaf area, and sunflower seed saw 100% yield loss. Although phenotypically similar, plants of the low treatment groups exhibited changes in the ionome, illustrating the influence of PW on plant uptake, translocation, and accumulation of metals, salts, and micronutrients. In addition, bioavailability of metals and nutrients was impacted by the unique and complex PW matrix: bioconcentration factors traditionally used to evaluate risk may therefore over or underestimate accumulation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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