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Authors Rozema, ER; Gordon, RJ; Zheng, YB
Author Full Name Rozema, Eric R.; Gordon, Robert J.; Zheng, Youbin
Title Harvesting Plants in Constructed Wetlands to Increase Biomass Production and Na+ and Cl- Removal from Recycled Greenhouse Nutrient Solution
Source WATER AIR AND SOIL POLLUTION
Language English
Document Type Article
Author Keywords Halophytes; Horticulture; Phytodesalinization; Water treatment
Keywords Plus FLOW WETLANDS; WATER; PERFORMANCE; SEWAGE; RUNOFF; IMPACT; SALT
Abstract Recycled greenhouse nutrient solution requires treatment to prevent increased concentrations of both Na+ and Cl-ions from damaging crops or impacting the environment subsequent to its discharge. Constructed wetlands (CW) planted with species capable of hyper-accumulating Na+ and Cl- may be one viable treatment option. To mitigate the unwanted ions from CW, plant material may need to be harvested and removed. Research suggests that multiple harvests throughout the growing season can maximize the CW phytoremediation potential. To determine the ideal frequency of CW plant harvesting, an 18-week, outdoor microcosm experiment was conducted in which three wetland plant species, Juncus torreyi Coville. (Torrey's rush), Schoenoplectus tabernaemontani (C. C. Gmel.) Palla (softstem bulrush), and Typha latifolia L. (broad leaf cattail), were subjected to the following harvesting treatments: (i) one harvest, (ii) two harvests, and (iii) three harvests. The total amounts of Na+ and Cl- accumulated in the aboveground dry biomass per square meter of plant growth area were calculated. Treatments with the highest Na+ accumulation were as follows: T. latifolia with three harvests, 24.7 g m(-2), T. latifolia with two harvests, 16.2 g m(-2), J. torreyi with two harvests, 12.7 g m(-2). Treatments with the highest Claccumulation were as follows: J. torreyi with two harvests, 111.3 g m(-2), T. latifolia with three harvests, 94.8 g m(-2), T. latifolia with two harvests, 81.4 g m(-2). Harvesting, whether two or three times, increased the Na+ and Cl- accumulated by T. latifolia and J. torreyi but did not influence the Na+ and Cl- accumulation or growth of S. tabernaemontani. However, the average Na+ and Cl- removal efficiencies of the all treatments were low, between 1-5 % for Na+ and 7-15 % for Cl-, suggesting that phytodesalinization may not be the best option for Na+ and Cl- treatment.
Author Address [Rozema, Eric R.; Zheng, Youbin] Univ Guelph, Sch Environm Sci, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada; [Gordon, Robert J.] Wilfrid Laurier Univ, Dept Geog & Environm Studies, Waterloo, ON N2L 3C5, Canada
Reprint Address Zheng, YB (reprint author), Univ Guelph, Sch Environm Sci, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.
E-mail Address yzheng@uoguelph.ca
Funding Agency and Grant Number Fed Dev Applied Research and Commercialization Initiative Extension program; Aqua Treatment Technologies
Funding Text This work was financially supported by the Fed Dev Applied Research and Commercialization Initiative Extension program and Aqua Treatment Technologies.
Times Cited 5
Total Times Cited Count (WoS, BCI, and CSCD) 5
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0049-6979
29-Character Source Abbreviation WATER AIR SOIL POLL
ISO Source Abbreviation Water Air Soil Pollut.
Publication Date MAY
Year Published 2016
Volume 227
Issue 5
Article Number 136
Digital Object Identifier (DOI) 10.1007/s11270-016-2831-1
Page Count 8
Web of Science Category Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources
Subject Category Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences; Water Resources
Document Delivery Number DM3VZ
Unique Article Identifier WOS:000376276100007
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