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• W60953758 abstract "Constructed wetland is an effective wastewater treatment technology which is usedin worldwide. Nevertheless, the effectiveness of using this wastewater treatment isdepending on the selection of the type of design used and other factors. This researchwas conduced to test the influence of media and vegetation subsurface flowconstructed wetlands, designed based on the first-order plug flow kinetics. In thisstudy, four horizontal subsurface flow wetlands (HSSF), each with dimensions of 1.3m (L) × 0.5 m (W) ×0.4 m (D), were constructed at the Research Station of TehranUniversity, located in Karaj, Iran. The study was carried out from April toSeptember, 2007. Gravel and zeoilte were used in this study as substrate. Gravelbedswith and without plants, and gravel-beds mixed with 10% zeolite, with andwithout plants were examined to investigate the feasibility of treating syntheticwastewater which was specially produced and modified to imitate agriculturalwastewater. The average synthetic influent wastewater contained approximately 100 mg l-1 Nitrate (NO3-N), 10 mg l-1 total Phosphorous, 10 mg l-1 Zn (II), 2 mg l-1 Pb (II)and 1 mg l-1 Cd (II), while the macrophytes selected were Phragmites Australis andJuncus Inflexus in combine with each other. Water discharge was 65 l / day for eachcell, and retention time (HRT) was 1.4 d. The influent and effluent Zn, Pb, Cd, P andNO3-N concentrations were monitored and analyzed every 15 days to assess theperformance of the wetland units for removal efficiencies based on the statisticalanalyses. Two intermediate samples were also collected from each cell to evaluatethe values of pollutant concentrations, the parameters along the units, and the effectof the HRT. At the end of the study, plants were harvested and analyzed for thesame factors (NO3, P, Zn, Pb and Cd).The results derived indicated that the system had acceptable and optimal pollutantremoval efficiency, and that both plants were found tolerant under the testedconditions. The wetland system could achieve the NO3-N removal of 79.19% invegetated cell with gravel and 10% zeolite as substrate, and 86.58% in anunvegetated cell with gravel and 10% zeolite as substrate, and 82.39% in vegetatedcell with gravel as substrate, and finally 87.94% in unvegetated cell with gravel assubstrate. As for the P removal, the efficiencies of 93.12%, 89.47%, 81.76% and76.65% were respectively achieved for the vegetated cell with gravel and zeolite assubstrate, the vegetated cell with gravel as substrate, unvegetated cell with gravel andzeolite as substrate, and unvegetated cell with gravel as substrate. The outflowconcentrations of Pb and Cd were found to be under the detection limit; however, asfor Zn, the removal efficiencies of 99.9%, 99.76%, 99.71% and 99.52% wereconcluded for the vegetated cell with gravel and zeolite, unvegetated cell with graveland zeolite, vegetated cell with gravel, and unvegetated cell with gravel, respectively." @default.
• W60953758 created "2016-06-24" @default.
• W60953758 creator A5091734444 @default.
• W60953758 date "2008-01-01" @default.
• W60953758 modified "2023-09-26" @default.
• W60953758 title "Treatment of Synthetic Wastewater Using Horizontal Subsurface Flow Constructed Wetland" @default.
• W60953758 hasPublicationYear "2008" @default.
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