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Cubical-Shaped Rods of Pectin–HydroxyapatiteComposite for Adsorption Studies of Fluoride by Statistical Methodand Adsorption Experiments

机译:果胶-羟基磷灰石的立方体形棒统计法研究氟化物的吸附研究和吸附实验

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摘要

This research details the synthesis and application of a novel pectin–hydroxyapatite (PHAp) composite for fluoride (F) adsorption from aqueous solutions. To determine the efficiency of the adsorption process parameters, i.e., adsorbent dose (0.1–0.4 g), initial fluoride concentration (10–30 mg/L), and temperature (298–313 K), the Box–Behnken design with three levels and three factors have been utilized. The quadratic model was established on 27 batch runs by regression analysis of the experimental data of these runs. The efficacy of adsorption was observed using the Langmuir and Freundlich models. The adsorption rate was found at 3.17 mg g−1min–1, and adsorption kinetics followed pseudo-second order (PSO) for PHAp. The significant novelty of this work is the synthesis of unique cubical-shaped rods biopolymer composite from hydroxyapatite. Additionally, this composite showed high adsorption capacity for F compared to other hydroxyapatite adsorbents, and the improved adsorption capacity is attributed to its unique shape which provides a larger surface area. It can be reused for up to six cycles, which makes thismethod environment-friendly. The economic viability of the synthesizedPHAp composite, in comparison to other adsorbents, is evident fromthe cost–benefit analysis.
机译:这项研究详细介绍了一种新型果胶-羟基磷灰石(PHAp)复合材料的合成及其在水溶液中吸附氟化物(F )的应用。为了确定吸附过程参数的效率,即吸附剂剂量(0.1-0.4 g),初始氟化物浓度(10-30 mg / L)和温度(298-313 K),采用Box-Behnken设计,分为三个等级并利用了三个因素。通过对这些批次的实验数据进行回归分析,在27个批次批次中建立了二次模型。使用Langmuir和Freundlich模型观察了吸附的功效。吸附速率为3.17 mg g −1 min -1 ,PHAp的吸附动力学遵循伪二级(PSO)。这项工作的重大新颖性是由羟基磷灰石合成独特的立方棒生物聚合物复合材料。此外,与其他羟基磷灰石吸附剂相比,该复合材料对F 的吸附能力更高,并且其独特的形状可提供更大的表面积,从而提高了吸附能力。它最多可以重复使用六个周期,这使得方法环保。合成物的经济可行性与其他吸附剂相比,PHAp复合材料从以下方面可以明显看出成本效益分析。

著录项

  • 期刊名称 ACS Omega
  • 作者单位
  • 年(卷),期 2018(3),8
  • 年度 2018
  • 页码 9675–9688
  • 总页数 14
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

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