Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions
Апстракт
Apatites are well known matrix for heavy metal immobilization and remediation of ground water and contaminated soils. In this work, capacities of different synthetic hydroxyapatite (HAP) samples for Pb, Cd, Sr and Zn sorption were analyzed, from single metal solutions and their equimolar mixture. Initial concentration of each metal in single metal solutions and total metal concentration in the mixture was 10(-2) mol/dm(3). Initial pH was adjusted to 5.0 +/- 0.1. After 24 h equilibration of HAP samples with heavy metal solutions (solid/liquid ratio 1:200), the concentration of metals and of Ca2+ released from crystal lattice, as well as the final pH values were measured. The selectivity of all samples, regardless of the differences in their compositions, crystallinities, specific surface areas, points of zero charge and sorption capacities, was as follows: Pb GT Cd GT Zn GT Sr. The same order was obtained for both single metal solutions and their mixture. In all cases, the sorption was ...followed by a decrease in final pH values, which are lower than the pH(PZC) values obtained by equilibration of HAP samples with an inert electrolyte (KNO3). A linear relationship between the amount of metals sorbed and Ca2+ released from HAP was observed. Also, a correlation between sorption capacities and physicochemical properties of HAP samples was found.
Кључне речи:
correlation / HAP / pH(pzc) / selectivity / sorption capacitiesИзвор:
Materials Science Forum, 2005, 494, 405-410Напомена:
- Current Research in Advanced Materials and Processes, 6th Conference of the Yugoslav-Materials-Research-Society, Sep 13-17, 2004, Herceg Novi, Montenegro
Колекције
Институција/група
VinčaTY - JOUR AU - Smičiklas, Ivana D. AU - Onjia, Antonije E. AU - Markovic, J AU - Raičević, Slavica PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6535 AB - Apatites are well known matrix for heavy metal immobilization and remediation of ground water and contaminated soils. In this work, capacities of different synthetic hydroxyapatite (HAP) samples for Pb, Cd, Sr and Zn sorption were analyzed, from single metal solutions and their equimolar mixture. Initial concentration of each metal in single metal solutions and total metal concentration in the mixture was 10(-2) mol/dm(3). Initial pH was adjusted to 5.0 +/- 0.1. After 24 h equilibration of HAP samples with heavy metal solutions (solid/liquid ratio 1:200), the concentration of metals and of Ca2+ released from crystal lattice, as well as the final pH values were measured. The selectivity of all samples, regardless of the differences in their compositions, crystallinities, specific surface areas, points of zero charge and sorption capacities, was as follows: Pb GT Cd GT Zn GT Sr. The same order was obtained for both single metal solutions and their mixture. In all cases, the sorption was followed by a decrease in final pH values, which are lower than the pH(PZC) values obtained by equilibration of HAP samples with an inert electrolyte (KNO3). A linear relationship between the amount of metals sorbed and Ca2+ released from HAP was observed. Also, a correlation between sorption capacities and physicochemical properties of HAP samples was found. T2 - Materials Science Forum T1 - Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions VL - 494 SP - 405 EP - 410 UR - https://hdl.handle.net/21.15107/rcub_vinar_6535 ER -
@article{ author = "Smičiklas, Ivana D. and Onjia, Antonije E. and Markovic, J and Raičević, Slavica", year = "2005", abstract = "Apatites are well known matrix for heavy metal immobilization and remediation of ground water and contaminated soils. In this work, capacities of different synthetic hydroxyapatite (HAP) samples for Pb, Cd, Sr and Zn sorption were analyzed, from single metal solutions and their equimolar mixture. Initial concentration of each metal in single metal solutions and total metal concentration in the mixture was 10(-2) mol/dm(3). Initial pH was adjusted to 5.0 +/- 0.1. After 24 h equilibration of HAP samples with heavy metal solutions (solid/liquid ratio 1:200), the concentration of metals and of Ca2+ released from crystal lattice, as well as the final pH values were measured. The selectivity of all samples, regardless of the differences in their compositions, crystallinities, specific surface areas, points of zero charge and sorption capacities, was as follows: Pb GT Cd GT Zn GT Sr. The same order was obtained for both single metal solutions and their mixture. In all cases, the sorption was followed by a decrease in final pH values, which are lower than the pH(PZC) values obtained by equilibration of HAP samples with an inert electrolyte (KNO3). A linear relationship between the amount of metals sorbed and Ca2+ released from HAP was observed. Also, a correlation between sorption capacities and physicochemical properties of HAP samples was found.", journal = "Materials Science Forum", title = "Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions", volume = "494", pages = "405-410", url = "https://hdl.handle.net/21.15107/rcub_vinar_6535" }
Smičiklas, I. D., Onjia, A. E., Markovic, J.,& Raičević, S.. (2005). Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions. in Materials Science Forum, 494, 405-410. https://hdl.handle.net/21.15107/rcub_vinar_6535
Smičiklas ID, Onjia AE, Markovic J, Raičević S. Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions. in Materials Science Forum. 2005;494:405-410. https://hdl.handle.net/21.15107/rcub_vinar_6535 .
Smičiklas, Ivana D., Onjia, Antonije E., Markovic, J, Raičević, Slavica, "Comparison of hydroxyapatite sorption properties towards cadmium, lead, zinc and strontium ions" in Materials Science Forum, 494 (2005):405-410, https://hdl.handle.net/21.15107/rcub_vinar_6535 .