Reclamation of Saline Sodic Soils with the Use of Mixed Fly Ash and Sewage Sludge

Ors S., ŞAHİN Ü., KHADRA R.

ARID LAND RESEARCH AND MANAGEMENT, cilt.29, sa.1, ss.41-54, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/15324982.2014.903314
  • Dergi Adı: ARID LAND RESEARCH AND MANAGEMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.41-54
  • Anahtar Kelimeler: hydraulic conductivity, bulk density, electrical conductivity, pH, exchangeable sodium percentage, porosity, HYDRAULIC CONDUCTIVITY, CHEMICAL-PROPERTIES, AMENDMENT, WATER, MANAGEMENT, GROWTH, MANURE
  • Atatürk Üniversitesi Adresli: Evet

Özet

Reclamation of saline sodic soils is a main problem at most of arid lands. Improving soil properties with waste materials has been investigated earlier but the effect of these materials on saline sodic soils is not fully known. A fly ash and sewage sludge mixture was applied to saline sodic soils with the intention of soil reclamation and eco-friendly waste recycling. Fly ash and sewage sludge mixtures were applied at a ratio of 1:1 to soils with three different levels of electrical conductivity (EC) and exchangeable sodium percentage (ESP) (soil I: 4.27dSm(-1), 6.09%; soil II: 73.20dSm(-1), 51.03%; soil III: 38.2dSm(-1), 86.2%) at 3 different doses, that is, 40, 80, and 120tha(-1). Saturated hydraulic conductivity and porosity generally increased in all the soils tested, whereas bulk density and pH decreased. ESP and EC values of the amended layers decreased considerably with the application of increasing doses of waste material. These results indicate that when properly applied, two industrial residues, sewage sludge and fly ash, that are associated with a negative environmental impact, can be recycled allowing for the cheap reclamation of barren saline sodic soil.