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Carbon-containing bone hydroxyapatite obtained from tuna fish bone with high adsorption performance for Congo red

机译:从金枪鱼鱼骨中获得的对刚果红具有高吸附性能的含碳骨羟基磷灰石

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The carbon-containing bone hydroxyapatite (CBHA) has been obtained from tuna fish bone in which the carbon derived from the organics inside the bones acts as a dispersant. The XRD and TEM results indicated that the obtained HA is on the nanoscale and the N2 adsorption/desorption isotherm showed that CBHA has mesoporous structure with an enhanced specific surface area (1129.0 m2 g?1). Moreover, CBHA as an adsorbent for removal of Congo red (CR) from aqueous solution exhibited high adsorption capacity (329.0 mg g?1) and the adsorption pattern fitted well with Langmuir model (R2 > 0.96). The adsorption kinetics of CBHA for CR followed the pseudo-second-order model. Thermodynamic parameters, including the Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS), indicated that the adsorption of CR onto CBHA was feasible, spontaneous, and endothermic at the temperature range of 303–323 K. Thus, CBHA as an efficient and low-cost adsorbent can be applied to the treatment of industrial effluents contaminated with CR.
机译:含碳的骨羟基磷灰石(CBHA)是从金枪鱼鱼骨中获得的,其中来源于骨内部有机物的碳充当分散剂。 XRD和TEM结果表明,所获得的HA处于纳米级,N 2 吸附/解吸等温线表明CBHA具有介孔结构,比表面积增加(1129.0) m 2 g ?1 )。此外,CBHA作为用于从水溶液中去除刚果红(CR)的吸附剂具有高吸附容量(329.0 mg g ?1 ),并且吸附模式与Langmuir吻合得很好。模型( R 2 G ),焓(Δ H )和熵(Δ S ),表明在303–323 K的温度范围内将CR吸附到CBHA上是可行的,自发的并且是吸热的。因此,CBHA作为一种高效且低成本的吸附剂可以用于处理受CR污染的工业废水。

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