TY - JOUR
T1 - Chemical modification of sodium alginate with thiosemicarbazide for the removal of Pb(II) and Cd(II) from aqueous solutions
AU - Córdova, Bryan M.
AU - Jacinto, Christian R.
AU - Alarcón, Hugo
AU - Mejía, Ily M.
AU - López, Rosario C.
AU - de Oliveira Silva, Denise
AU - Cavalheiro, Eder
AU - Venâncio, Tiago
AU - Dávalos, Juan Z.
AU - Valderrama, A. C.
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12
Y1 - 2018/12
N2 - A new material (AlgOx–TSC), based on alginate (Alg) chemically modified with thiosemicarbazide (TSC), has been synthesized and tested as an effective biomaterial to remove Pb(II) and Cd(II) ions in aqueous solutions. The synthesis was carried out by controlling the following steps, i/partial oxidation process of alginate in NaIO4 to obtain AlgOx, ii/reacting of AlgOx, at 40–45 °C, with TSC in NaBH4. AlgOx–TSC has been characterized by Field Emission Scanning Electron Microscopy (FESEM/EDS), Fourier Transform Infrared Spectroscopy (ATR-IR), solid state 13C NMR spectroscopy and Point of Zero Charge (pHPZC) measuremenmts. In order to enhance the sorption process, the effect of contact time, sorbent dosage, initial concentration and reusability of the novel sorbent were investigated becoming the AlgOx–TSC a promising material capable of removing high concentrations of heavy metal ions such as Pb(II) (up to 950 mg/g at pH 3) and Cd(II) (up to 300 mg/g at pH 7) in aqueous solutions.
AB - A new material (AlgOx–TSC), based on alginate (Alg) chemically modified with thiosemicarbazide (TSC), has been synthesized and tested as an effective biomaterial to remove Pb(II) and Cd(II) ions in aqueous solutions. The synthesis was carried out by controlling the following steps, i/partial oxidation process of alginate in NaIO4 to obtain AlgOx, ii/reacting of AlgOx, at 40–45 °C, with TSC in NaBH4. AlgOx–TSC has been characterized by Field Emission Scanning Electron Microscopy (FESEM/EDS), Fourier Transform Infrared Spectroscopy (ATR-IR), solid state 13C NMR spectroscopy and Point of Zero Charge (pHPZC) measuremenmts. In order to enhance the sorption process, the effect of contact time, sorbent dosage, initial concentration and reusability of the novel sorbent were investigated becoming the AlgOx–TSC a promising material capable of removing high concentrations of heavy metal ions such as Pb(II) (up to 950 mg/g at pH 3) and Cd(II) (up to 300 mg/g at pH 7) in aqueous solutions.
KW - Alginate
KW - Cd(II)
KW - Chemical modification
KW - Pb(II)
KW - Thiosemicarbazide
UR - http://www.scopus.com/inward/record.url?scp=85054407865&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2018.08.095
DO - 10.1016/j.ijbiomac.2018.08.095
M3 - Artículo (Contribución a Revista)
C2 - 30142365
AN - SCOPUS:85054407865
SN - 0141-8130
VL - 120
SP - 2259
EP - 2270
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -