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Effects of sorption, sulphate reduction, and Phragmites australis on the removal of heavy metals in subsurface flow constructed wetland microcosms

(2007) WATER SCIENCE AND TECHNOLOGY. 56(3). p.193-198
Author
Organization
Abstract
The removal of Co, Ni, Cu and Zn from synthetic industrial wastewater was studied in subsurface flow constructed wetland microcosms filled with gravel or a gravel/straw mixture. Half of the microcosms were planted with Phragmites australis and half were left unplanted. All microcosms received low-strength wastewater (1 mg L-1 of Co, Ni, and Zn, 0.5 mg L-1 Cu, 2,000 mg L-1 SO4) during seven 14-day incubation batches. The pore water was regularly monitored at two depths for heavy metals, sulphate, organic carbon and redox potential. Sorption properties of gravel and straw were assessed in a separate experiment. A second series of seven incubation batches with high-strength wastewater (10 mg L-1 of each metal, 2,000 mg L-1 SO4) was then applied to saturate the substrate. Glucose was added to the gravel microcosms together with the high-strength wastewater. Sorption processes were responsible for metal removal during start-up, with the highest removal efficiencies in the gravel microcosms. The lower initial efficiencies in the gravel/straw microcosms were presumably caused by the decomposition of straw. However, after establishment of anaerobic conditions (Eh~-200 mV), precipitation as metal sulphides provided an additional removal pathway in the gravel/straw microcosms. The addition of glucose to gravel microcosms enhanced sulphate reduction and metal removal, although Phragmites australis negatively affected these processes in the top-layer of all microcosms.
Keywords
straw, zinc, copper, Cobalt, industrial wastewater, WATER, GROWTH, TRACE-ELEMENTS, redox, nickel

Citation

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MLA
Lesage, Els, Diederik Rousseau, Annelies Van de Moortel, et al. “Effects of Sorption, Sulphate Reduction, and Phragmites Australis on the Removal of Heavy Metals in Subsurface Flow Constructed Wetland Microcosms.” WATER SCIENCE AND TECHNOLOGY 56.3 (2007): 193–198. Print.
APA
Lesage, Els, Rousseau, D., Van de Moortel, A., Tack, F., De Pauw, N., & Verloo, M. (2007). Effects of sorption, sulphate reduction, and Phragmites australis on the removal of heavy metals in subsurface flow constructed wetland microcosms. WATER SCIENCE AND TECHNOLOGY, 56(3), 193–198.
Chicago author-date
Lesage, Els, Diederik Rousseau, Annelies Van de Moortel, Filip Tack, Niels De Pauw, and Marc Verloo. 2007. “Effects of Sorption, Sulphate Reduction, and Phragmites Australis on the Removal of Heavy Metals in Subsurface Flow Constructed Wetland Microcosms.” Water Science and Technology 56 (3): 193–198.
Chicago author-date (all authors)
Lesage, Els, Diederik Rousseau, Annelies Van de Moortel, Filip Tack, Niels De Pauw, and Marc Verloo. 2007. “Effects of Sorption, Sulphate Reduction, and Phragmites Australis on the Removal of Heavy Metals in Subsurface Flow Constructed Wetland Microcosms.” Water Science and Technology 56 (3): 193–198.
Vancouver
1.
Lesage E, Rousseau D, Van de Moortel A, Tack F, De Pauw N, Verloo M. Effects of sorption, sulphate reduction, and Phragmites australis on the removal of heavy metals in subsurface flow constructed wetland microcosms. WATER SCIENCE AND TECHNOLOGY. 2007;56(3):193–8.
IEEE
[1]
E. Lesage, D. Rousseau, A. Van de Moortel, F. Tack, N. De Pauw, and M. Verloo, “Effects of sorption, sulphate reduction, and Phragmites australis on the removal of heavy metals in subsurface flow constructed wetland microcosms,” WATER SCIENCE AND TECHNOLOGY, vol. 56, no. 3, pp. 193–198, 2007.
@article{4233704,
  abstract     = {The removal of Co, Ni, Cu and Zn from synthetic industrial wastewater was studied in subsurface flow constructed wetland microcosms filled with gravel or a gravel/straw mixture. Half of the microcosms were planted with Phragmites australis and half were left unplanted. All microcosms received low-strength wastewater (1 mg L-1 of Co, Ni, and Zn, 0.5 mg L-1 Cu, 2,000 mg L-1 SO4) during seven 14-day incubation batches. The pore water was regularly monitored at two depths for heavy metals, sulphate, organic carbon and redox potential. Sorption properties of gravel and straw were assessed in a separate experiment. A second series of seven incubation batches with high-strength wastewater (10 mg L-1 of each metal, 2,000 mg L-1 SO4) was then applied to saturate the substrate. Glucose was added to the gravel microcosms together with the high-strength wastewater. Sorption processes were responsible for metal removal during start-up, with the highest removal efficiencies in the gravel microcosms. The lower initial efficiencies in the gravel/straw microcosms were presumably caused by the decomposition of straw. However, after establishment of anaerobic conditions (Eh~-200 mV), precipitation as metal sulphides provided an additional removal pathway in the gravel/straw microcosms. The addition of glucose to gravel microcosms enhanced sulphate reduction and metal removal, although Phragmites australis negatively affected these processes in the top-layer of all microcosms.},
  author       = {Lesage, Els and Rousseau, Diederik and Van de Moortel, Annelies and Tack, Filip and De Pauw, Niels and Verloo, Marc},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keywords     = {straw,zinc,copper,Cobalt,industrial wastewater,WATER,GROWTH,TRACE-ELEMENTS,redox,nickel},
  language     = {eng},
  number       = {3},
  pages        = {193--198},
  title        = {Effects of sorption, sulphate reduction, and Phragmites australis on the removal of heavy metals in subsurface flow constructed wetland microcosms},
  url          = {http://dx.doi.org/10.2166/wst.2007.509},
  volume       = {56},
  year         = {2007},
}

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