Lead removal from aqueous solutions by raw sawdust and magnesium pretreated biochar: Experimental investigations and numerical modelling.
Lead removal from aqueous solutions by raw cypress (Cupressus sempervirens L.) sawdust (RCS) and its derivative magnesium pretreated biochar (Mg-B) was investigated under static and dynamic conditions through batch and column assays. The Hydrus-1D model was used to estimate the transport parameters of the lead measured breakthrough curves. The batch experiments results showed that Mg-B was very efficient in removing lead compared to RCS and several other previously tested natural and modified materials. The column experiments results indicated that for both RCS and Mg-B, lead breakthrough curves and the related removal efficiencies were mainly dependent on the used initial concentration and the adsorbents bed height. The use of Hydrus-1D showed that the two-site chemical non-equilibrium model describes better the experimental lead breakthrough curves for both RCS and Mg-B as the equilibrium model.
Water Research and Technologies Centre (CERTE), Wastewaters and Environment Laboratory, Tunisia. Electronic address: salah.jallali@certe.rnrt.tn.
Salah
S
Jellali
Technical University of Braunschweig, Institute of Geoecology, Germany.
Efstathios
E
Diamantopoulos
Water Research and Technologies Centre (CERTE), Wastewaters and Environment Laboratory, Tunisia.
Khouloud
K
Haddad
Water Research and Technologies Centre (CERTE), Wastewaters and Environment Laboratory, Tunisia.
Makram
M
Anane
Technical University of Braunschweig, Institute of Geoecology, Germany.
Wolfgang
W
Durner
Water Research and Technologies Centre (CERTE), Wastewaters and Environment Laboratory, Tunisia.
Ammar
A
Mlayah
D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D029781:Cupressus; D007854:Lead / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D008962:Models, Theoretical; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014934:Wood / Q000737:chemistry*
D012996:Solutions; D014874:Water Pollutants, Chemical; C540010:biochar; D002606:Charcoal; D007854:Lead; D008274:Magnesium
Biochar; Hydrus; Lead; Modelling; Removal; Sawdust