首页|Stearic acid-modified hollow hydroxyapatite particles with enhanced hydrophobicity for oil adsorption from oil spills
Stearic acid-modified hollow hydroxyapatite particles with enhanced hydrophobicity for oil adsorption from oil spills
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NSTL
Oil spills lead to a substantial depletion of aquatic biodiversity. The mitigation of an oil spill can entailconsiderable financial outlays, give rise to consequential environmental impacts, and present formidable operationalcomplexities. In this research, hollow hydroxyapatite particles with enhanced oil adsorption characteristicswere prepared by surface modification with stearic acid. Peanut and vacuum pump oils were used toimitate oil spills and conduct adsorption tests. The 50% stearic acid-modified hydroxyapatite (Sa/HAP) adsorbentshowed superior hydrophobic properties with respect to water contact angle data. Adsorption isothermanalysis revealed that the adsorption processes of peanut and vacuum pump oils matched well with the Sipsisotherm model, with regression coefficients of 0.992 and 0.996, respectively. The oil adsorption by the modifiedhydroxyapatite (HAP) adsorbent was found to be 9.85 g⋅g~(-1) for peanut oil and 12.13 g⋅g~(-1) for vacuum pump oil.Furthermore, the adsorption kinetics performance was determined by chemical interaction, whereas theadsorption equilibrium capacities were 8.97 g⋅g~(-1) and 11.41 g⋅g~(-1), respectively. Recycling of the spent adsorbentwas performed with toluene stripping. The synthesized oil-adsorbents were analyzed by SEM, FTIR, XRD,contact angle, and TGA analyses. Hence, the efficacy of the Sa/HAP material as a potential adsorbent for thepurification of oil-contaminated water was established, attributed to its commendable oil adsorption capability.
NETL
NSTL
