Cr(VI) reduction in aqueous solutions by using copper smelter slag


Kiyak B., Özer A., Altundoǧan H., ERDEM M., Tümen F.

Waste Management, cilt.19, sa.5, ss.333-338, 1999 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 5
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0956-053x(99)00141-5
  • Dergi Adı: Waste Management
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.333-338
  • Anahtar Kelimeler: copper smelter slag, carbonatation sludge, Cr(VI) reduction, chromium removal
  • Hacettepe Üniversitesi Adresli: Hayır

Özet

The ability of Copper Smelter Slag (CSS) to reduce Cr(VI) in aqueous solutions has been investigated. The extent of reduction is dependent on the amounts of acid and reductant, contact time, Cr(VI) concentration, temperature of the solution and particle size of CSS. The amount of acid is the most important variable affecting the reduction process. When twice the amount of acid required with respect to Cr(VI) was used, Cr(VI) in 100 ml solution (100 mg/l) was completely reduced in a contact period less than 5 min by a 10 g/l dosage of CSS. Reduction efficiency increased with increase in temperature of solution, showing that the process is endothermic. Reduced chromium, and iron and other metals dissolved from CSS were effectively precipitated by using NaOH or calcinated carbonatation sludge from sugar plant.