Removal of phosphate from wastewaters

OGUZ E., Gurses A., CANPOLAT N.

CEMENT AND CONCRETE RESEARCH, cilt.33, sa.8, ss.1109-1112, 2003 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 8
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0008-8846(03)00016-4
  • Dergi Adı: CEMENT AND CONCRETE RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1109-1112
  • Anahtar Kelimeler: concrete, SEM, adsorption, WASTE-WATER, ADSORPTION, PHOSPHORUS, VARIABLES, TNSAC, SLAG
  • Atatürk Üniversitesi Adresli: Evet

Özet

Gas concrete waste was used to remove phosphate from aqueous solutions in this study. The influence of suspension pH, temperature, mixing rate, and gas concrete dosage on phosphate removal was investigated by conducting a series of batch adsorption experiments. In addition, the yield and mechanisms of phosphate removal were explained on the basis of the results of X-ray spectroscopy, measurements of zeta potential of particles, both values of BET-N-2 specific surface area, and images of scanning electron microscopy (SEM) of the particles before and after adsorption. In this study, phosphate removal in excess of 99% was obtained and it was concluded that wastes of gas concrete are an efficient adsorbent for the removal of phosphate. The removal of phosphate predominantly takes place by precipitation mechanism and the weak physical interactions between the surface of adsorbent and the metallic salts of phosphate. (C) 2003 Elsevier Science Ltd. All rights reserved.