Sorption characteristics of organic compounds on three hexadecyltrimethylammonium-smectites having different cation exchange capacities

Celik A., Yildiz N., Calimli A.

REVIEWS IN CHEMICAL ENGINEERING, cilt.15, sa.4, ss.349-362, 1999 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 15 Sayı: 4
  • Basım Tarihi: 1999
  • Dergi Adı: REVIEWS IN CHEMICAL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.349-362
  • Anahtar Kelimeler: adsorption, smectite, organobentonite, organic pollutants, hexadecyltrimethylammonium, TETRACHLOROMETHANE SORPTION, CLAY, WATER, ADSORPTION, COMPLEXES
  • Ankara Üniversitesi Adresli: Evet

Özet

The removal of organic contaminants from wastewater has been studied by using hexadecyltrimethylammonium bentonites (HDTMA-bentonites) having different cation exchange capacity (CEC). HDTMA-bentonites were synthesized by placing quaternary ammonium surfactant (hexadecyltrimethylammonium bromide) on Cankiri sodium bentonite (CNa-B) having 85 meq/100 g clay, Kutahya calcium bentonite (KCa-B) having 65 meq /100 g clay and Cankiri calcium bentonite (CCa-B) having 47,5 meq/100 g clay by cation exchange. The sorption of organic pollutants was examined by batch equilibration method at 25 degrees C. As organic contaminants, polar compounds (methylene blue, benzoic acid and salicylic acid) and nonpolar compounds (toluene and xylenes) were used. The concentrations of the organic pollutants used ranged from 0 to 700 mg/L. Methylene blue, benzoic acid and salicylic acid sorptions to HDTMA-bentonites were characterized by relatively strong solute uptake. Toluene and xylene sorptions to HDTMA-bentonite were weaker. The effectiveness of HDTMA- bentonites increased with CEC. It is concluded that high CEC HDTMA bentonite was a highly effective adsorbent for removing salicylic acid, benzoic acid and methylene blue.