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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 12, No. 8, 2015, pp. 2623-2638
Bioline Code: st15247
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 12, No. 8, 2015, pp. 2623-2638

 en Performance of a system of natural wetlands in leachate of a posttreatment landfill
Preussler, K. H.; Mahler, C. F. & Maranho, L. T

Abstract

Phytoremediation is an emerging technology in landfill leachate posttreatment. The evaluation of a system composed of three natural wetlands. The wetlands vegetation cover was monitored during 2 years by estimating the coverage area of the macrophytes. Chemical analyzes of the effluent were conducted monthly. The monitoring and identification of macrophytes indicated that the vegetation structure was represented by four species of higher relative cover: Pistia stratiotes check for this species in other resources L. (water lettuce), Echinochloa polystachya check for this species in other resources (Kunth) Hitchc. (creeping river grass), Eichhornia crassipes check for this species in other resources (Mart.) Solms (water hyacinth) and Alternanthera philoxeroides check for this species in other resources (Mart.) Griseb. The system of natural wetlands had an average efficiency of 75 % for biochemical oxygen demand, 63 % for chemical oxygen demand, 84 % for ammoniacal nitrogen, 89 % for total nitrogen and 70 % for phosphorus. The concentrations of heavy metals in the roots, as well as in the branches of E. crassipes and E. polystachya, lead us to the conclusion that such species perform phytoextraction for Cd and Pb accumulating the metals in the biomass. The results show that this is a viable alternative that can be associated with forms of conventional treatment of leachate, such as the treatment with aerobic and facultative ponds.

Keywords
Solid waste; Environmental pollution; Remediation; Phytoremediation; Macrophytes

 
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