Uptake of Sr²⁺ and Co²⁺ into Biogenic Hydroxyapatite: Implications for Biomineral Ion Exchange Synthesis

Abstract

Biomineral hydroxyapatite (Bio-HAp) produced by Serratia sp. has the potential to be a suitable material for the remediation of metal contaminated waters and as a radionuclide waste storage material. Varying the Bio-HAp manufacturing method was found to influence hydroxyapatite (HAp) properties and consequently the uptake of Sr(2+) and Co(2+). All the Bio-HAp tested in this study were more efficient than the commercially available hydroxyapatite (Com-HAp) for Sr(2+) and Co(2+) uptake. For Bio-HAp the uptake for Sr(2+) and Co(2+) ranged from 24 to 39 and 29 to 78 mmol per 100 g, respectively. Whereas, the uptake of Sr(2+) and Co(2+) by Com-HAp ranged from 3 to 11 and 4 to 18 mmol per 100 g, respectively. Properties that increased metal uptake were smaller crystallite size (<40 nm) and higher surface area (>70 m(2) g(-1)). Organic content which influences the structure (e.g., crystallite arrangement, size and surface area) and composition of Bio-HAp was also found to be important in Sr(2+) and Co(2+) uptake. Overall, Bio-HAp shows promise for the remediation of aqueous metal waste especially since Bio-HAp can be synthesized for optimal metal uptake properties.

Application of nano- and micro-sized particles of cattle manure on soybean growth

“…These nanoparticles are very small, ranging in size from 1 nm to 100 nm, with 1 nm being about 10 000 times smaller than the diameter of a human hair. These very tiny particles have large specific surface areas and high reactivity; they are quite fantastic to a variety of applications in various fields, including agriculture (4)(5)(6). Recent studies have had promising results on hydroxyapatite nanoparticles as P fertilizer (7,8).…”

Transport of ARS-labeled hydroxyapatite nanoparticles in saturated granular media is influenced by surface charge variability even in the presence of humic acid

“…Hydroxyapatite nanoparticle (Ca 10 (PO 4 ) 6 (OH) 2 , nHAP), due to its strong adsorptive properties for hazardous materials, is increasingly used in sequestration of metals and actinides in wastewater and nuclear waste disposal [1][2][3][4]. However, little attention has been paid to study the fate and transport of nHAP in granular environments.…”

Polyacrylamide–hydroxyapatite composite: Preparation, characterization and adsorptive features for uranium and thorium

“…The methods in obtaining hydroxyapatite include its extraction from waste resources such as shell, gypsum, and cow bone [17], and the synthetic preparation from its chemical components [18,19]. Recently, Handley-Sidhu et al [20] explored that the biogenic-HAP produced by Serratia sp. is a suitable material for the remediation of metal contaminated waters and for storage of radionuclides waste.…”