Biosorption of Cr(VI) by native isolate of Lyngbya putealis (HH-15) in the presence of salts.
Industrial wastewaters containing heavy metals along with high concentration of soluble salts pose a major environmental problem that needs to be remedied. The present study reports on biosorption of Cr(VI) by native isolate of Lyngbya putealis HH-15 in batch system under varying range of pH (2.0-10.0), initial metal ion concentration (10-100mg/l) and salt concentration (0-0.2%). Maximum metal removal (94.8%) took place at pH 3.0 with initial Cr concentration of 50mg/l, which got reduced (90.1%) in the presence of 0.2% salts. Adsorption equilibrium and kinetic behavior of Cr(VI) in solution was also examined. Both Langmuir and Freundlich models fitted well to explain the adsorption data (R(2)=0.90 and 0.87, respectively) at 0.2% salt concentration. Pseudo-second order kinetic model also fitted well to both the systems, viz. Cr(VI) and Cr(VI)+salt.
Kiran
Bala
B
Department of Environmental Science and Engineering, Guru Jambheshwar University of Science & Technology, Hisar 125 001, India.
Kaushik
Anubha
A
Kaushik
C P
CP
D000327:Adsorption; D002857:Chromium / Q000032:analysis / Q000737:chemistry*; D000458:Cyanobacteria; D006863:Hydrogen-Ion Concentration; D011189:Potassium Chloride / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D013431:Sulfates; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion; C031512:potassium sulfate; D012965:Sodium Chloride; D011189:Potassium Chloride