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Humic Acid Derived Resin: An Efficient Adsorbent for Au(III) Uptake from Aqueous Acidic Solution
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-03-02 , DOI: 10.1021/acs.jced.9b01085 Xiangmeng Chen 1 , Xingchuan Yang 1 , Yong Xiang 1 , Li Xu 1 , Guoji Liu 1
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-03-02 , DOI: 10.1021/acs.jced.9b01085 Xiangmeng Chen 1 , Xingchuan Yang 1 , Yong Xiang 1 , Li Xu 1 , Guoji Liu 1
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Humic acid-derived resin (named “RFH”) is employed for efficiently recovering gold from acidic aqueous solutions. The selectivity and effects of pH, contact time, initial concentration, and temperature on Au(III) adsorption by RFH have been studied. The RFH resin exhibited remarkable selectivity for gold ions over other metal ions and very high adsorption capacity for Au(III), up to 920 mg·g–1. The gold adsorption nicely conforms to the Freundlich isotherm model, and the removal of Au(III) from the aqueous solution by RFH resin follows pseudo-second-order kinetics. The RFH resin before and after adsorption was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), which provided evidence for gold adsorption mechanism of RFH. The results showed that Au(III) was adsorbed on RFH, then reduced to elemental gold, and deposited on the adsorbent in the form of the element gold. We summarize the process as an adsorption–reduction–deposition mechanism. This paper provide a new way for gold recovery from aqueous acidic solutions.
中文翻译：
腐殖酸衍生树脂：从酸性水溶液中吸收Au（III）的高效吸附剂
腐殖酸衍生的树脂（称为“ RFH”）用于从酸性水溶液中有效地回收金。研究了pH，接触时间，初始浓度和温度对RFH吸附Au（III）的选择性和影响。RFH树脂对金离子的选择性优于其他金属离子，对Au（III）的吸附能力非常高，最高可达920 mg·g –1。金的吸附很好地符合Freundlich等温模型，并且RFH树脂从水溶液中去除Au（III）遵循拟二级动力学。RFH树脂吸附前后的特征在于傅立叶变换红外（FT-IR），X射线衍射（XRD）和X射线光电子能谱（XPS），为RFH的金吸附机理提供了证据。结果表明，Au（III）吸附在RFH上，然后还原为元素金，并以元素金的形式沉积在吸附剂上。我们将该过程总结为一种吸附-还原-沉积机理。本文提供了一种从酸性水溶液中回收金的新方法。
更新日期：2020-04-24
中文翻译：
腐殖酸衍生树脂：从酸性水溶液中吸收Au（III）的高效吸附剂
腐殖酸衍生的树脂（称为“ RFH”）用于从酸性水溶液中有效地回收金。研究了pH，接触时间，初始浓度和温度对RFH吸附Au（III）的选择性和影响。RFH树脂对金离子的选择性优于其他金属离子，对Au（III）的吸附能力非常高，最高可达920 mg·g –1。金的吸附很好地符合Freundlich等温模型，并且RFH树脂从水溶液中去除Au（III）遵循拟二级动力学。RFH树脂吸附前后的特征在于傅立叶变换红外（FT-IR），X射线衍射（XRD）和X射线光电子能谱（XPS），为RFH的金吸附机理提供了证据。结果表明，Au（III）吸附在RFH上，然后还原为元素金，并以元素金的形式沉积在吸附剂上。我们将该过程总结为一种吸附-还原-沉积机理。本文提供了一种从酸性水溶液中回收金的新方法。
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