title: Utilization of natural zeolite and perlite as landfill liners for in situ leachate treatment in landfills.
abstract: The potential long term environmental impacts of a landfill on groundwater quality depend on its liner material properties. In case synthetic liner materials are damaged during the construction or operation, many of the original chemical and biological constituents are removed by filtration and the adsorptive action of natural liner materials such as natural zeolite, perlite and bentonite minerals. Before leachate treatment, reduction of these constituents is important not only to leachate percolation, but also treatment cost and efficiency. In this study, the pollutant removal efficiency from the leachate was investigated for natural natural zeolite, expanded perlite and bentonite. Experimental studies was performed in boxes made of glass and with 1:10 sloping. Leachate quantity was determined and pH, electrical conductivity (EC), nitrate (NO(3)-N), ammonium-nitrogen (NH(4)-N), phosphate (PO(4)), chemical oxygen demand (COD) and organic matter in leachate samples were measured and the measurement was compared with control process (System 4). The results showed that natural zeolite was effective in removing NO(3), NH(4), PO(4), COD and organic matter with removal efficiencies of 91.20, 95.6, 95.5, 83.4 and 87.8%, respectively. Expanded perlite has high efficiency removing of NO(3), PO(4) and COD 83.2, 91.0 and 62.5%, respectively, but it was unsuccessful in reducing NH(4) (1.5%).
authors: Department of Civil Engineering, Karadeniz Technical University, Trabzon 61080, Turkey. ummugulsum_ozel@yahoo.com.tr
authors: Ummukulsum
authors: U
authors: Ozel
authors: Andaç
authors: A
authors: Akdemir
authors: Osman Nuri
authors: ON
authors: Ergun
mesh_terms: D000537:Aluminum Oxide; D001546:Bentonite; D057919:Biological Oxygen Demand Analysis; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D012822:Silicon Dioxide; D014874:Water Pollutants, Chemical / Q000032:analysis*; D017641:Zeolites
chemical_list: D009566:Nitrates; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; C003076:Perlite; D001546:Bentonite; D017641:Zeolites; D012822:Silicon Dioxide; D000537:Aluminum Oxide