Following conclusions are made based on the results
of present study and scientific information derived from
literature:
1. The biosorbents evaluated viz. CS, AS, GS, WS and
TS can remove hexavalent chromium from aqueous
phase. Tamarind seed has high Cr(VI) removal
capacity than the other sorbent and can reduce aqueous
phase Cr(VI) concentration up to non-detectable
level.
2. The removal of Cr(VI) ions by tamarind seed signi-
ficantly decreased with increase in pH, slightly
decreased with increase in ionic strength and increased
with increase in temperature. The Cr(VI) removal
appears to be mainly by chemisorption.
3. Desorption of Cr(VI) from TS was partially achieved
under alkaline conditions.
4. The use of tamarind seed as an adsorbent seems to be
an economical and worthwhile alternative over conventional
methods