Removal of Cd(II) and Pb(II) from aqueous solution using dried water hyacinth as a biosorbent.
Possible usages of dried water hyacinth as biosorbent for metal ions were investigated. A model describing the plant is presented on density functional theory DFT and verified experimentally with FTIR. The model shows that water hyacinth is a mixture of cellulose and lignin. Dried shoot and root were found as good sorbent for Cd(II) and Pb(II) at optimum dosage of 5.0 g/l and pH 5.0; equilibrium time was attained within 30-60 min. The removal using root and shoot were nearly equal and reached more than 75% for Cd and more than 90% for Pb. Finally the second-order kinetics was the applicable model. Hydrogen bonds of reactive functional groups like COOH play the key role in the removal process.
Water Pollution Research Department, National Research Centre, 12311 Dokki, Cairo, Egypt.
Hanan S
HS
Ibrahim
Nabila S
NS
Ammar
Mustafa
M
Soylak
Medhat
M
Ibrahim
D000327:Adsorption; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000302:isolation & purification*; D002482:Cellulose / Q000737:chemistry; D031806:Eichhornia / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D008958:Models, Molecular; D008968:Molecular Conformation; D018517:Plant Roots / Q000378:metabolism; D018520:Plant Shoots / Q000378:metabolism; D012015:Reference Standards; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D012996:Solutions; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D002482:Cellulose