TY - JOUR
T1 - Lead and copper removal from groundwater by spherical agglomeration using a biosurfactant extracted from Yucca decipiens Trel.
AU - Bailón-Salas, Ana M.
AU - Ordaz-Díaz, Luis A.
AU - Cháirez-Hernández, Isaías
AU - Alvarado-de la Peña, Alicia
AU - Proal-Nájera, José B.
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/9
Y1 - 2018/9
N2 - The spherical agglomeration technique (SAT) has emerged as an innovative alternative for the removal of heavy metals from water at optimum levels of surfactant addition. This technique has achieved high removal efficiencies. In the present study, Yucca decipiens extracts were applied as the biosurfactant for the removal of heavy metals from groundwater of a mining community using SAT. Aqueous models were generated to explain the removal of copper and lead in solutions. It was possible to remove 99.96% and 99.62% respectively. The highest concentrations of copper and lead 209.5 and 2 mg L−1, respectively, were observed at a waterhole in the mining community. This sample was used to test the efficiency of SAT, using optimal conditions of the models. It was possible to remove 99.22% of copper and 91.50% of lead present in the groundwater. High concentrations of sodium and calcium were found. To reduce the residual sodium concentration, the pH was decreased from 11 to 9.5. 99.84% of copper and only 93.49% of lead were removed; the remaining concentrations did not exceed the limit of Mexican regulations (NOM-001-SEMARNAT-1996, 1996). It was demonstrated that the Yucca extracts are effective or the treatment of water with high concentrations of heavy metals under the conditions of SAT.
AB - The spherical agglomeration technique (SAT) has emerged as an innovative alternative for the removal of heavy metals from water at optimum levels of surfactant addition. This technique has achieved high removal efficiencies. In the present study, Yucca decipiens extracts were applied as the biosurfactant for the removal of heavy metals from groundwater of a mining community using SAT. Aqueous models were generated to explain the removal of copper and lead in solutions. It was possible to remove 99.96% and 99.62% respectively. The highest concentrations of copper and lead 209.5 and 2 mg L−1, respectively, were observed at a waterhole in the mining community. This sample was used to test the efficiency of SAT, using optimal conditions of the models. It was possible to remove 99.22% of copper and 91.50% of lead present in the groundwater. High concentrations of sodium and calcium were found. To reduce the residual sodium concentration, the pH was decreased from 11 to 9.5. 99.84% of copper and only 93.49% of lead were removed; the remaining concentrations did not exceed the limit of Mexican regulations (NOM-001-SEMARNAT-1996, 1996). It was demonstrated that the Yucca extracts are effective or the treatment of water with high concentrations of heavy metals under the conditions of SAT.
KW - Biosurfactant
KW - Copper
KW - Heavy metals
KW - Lead
KW - Spherical agglomeration
KW - Yucca sp.
UR - http://www.scopus.com/inward/record.url?scp=85047999009&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2018.05.103
DO - 10.1016/j.chemosphere.2018.05.103
M3 - Artículo
C2 - 29803876
SN - 0045-6535
VL - 207
SP - 278
EP - 284
JO - Chemosphere
JF - Chemosphere
ER -