Adsorption of Arsenic from Borated Water Using Mg-Fe-Hydrotalcite (FeHT)


TÜRK T. , ALP İ.

EKOLOJI, cilt.21, sa.84, ss.98-106, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Konu: 84
  • Basım Tarihi: 2012
  • Doi Numarası: 10.5053/ekoloji.2012.8411
  • Dergi Adı: EKOLOJI
  • Sayfa Sayıları: ss.98-106

Özet

High selectivity and removal capacity for an adsorbate ion are an important factor for the selection of an adsorbent. Hydrotalcite and hydrotalcite-like compounds as layered double hydroxide have received much attention for their potential application as adsorbents in various fields. Iron-based hydrotalcite compounds has a high selectivity for arsenic. Boron mineralization in Emet-Hisarcik region is one of the world's largest reserves of boron. Unlike the other boron mineralizations, it also contains arsenic minerals, which cause arsenic pollution in the surface and ground waters within the surrounding area. These waters have also significant levels of boron as dissolved oxyanion. The groundwaters associated with arsenical boron deposits was reported to contain up to 600 mu g/L As ve 1500 mg/L B. Remediation of arsenic and boron pollution in this water is therefore required. In this study, the removal of arsenic from borated waters by Fe-Hydrotalcite (FeHT) as iron-based layered double hydroxide was investigated. The investigations showed that the adsorption of arsenic was not influenced by increasing the boron concentration. Fe-Hydrotalcite was found to remove 98% of arsenic from ground water containing high level of boron with its ability to reduce As levels below the limit (10 mu g/L As) set for potable water by World Health Organization (WHO). The results of this study showed that FeHT, can be used as a potent adsorbant for the removal of arsenic from the borated waters.