Isolation of peat soil humic acid and its application for adsorption reduction of Au(III) have been conducted. Humic acid was isolated from peat soil that was collected from Rawa Pening, Central Java. Isolation of humic acid from peat soil was based on conventional alkaline extraction method. Humic acid was extracted from peat soil with NaOH 0.1 M, then precipitated with 0.1 M HCl, and purified with 0.1 M HCl/0.3 M HF 1/1. The isolated humic acid was characterized by FTIR spectroscopy, then applied for adsorption and reduction process of Au (III).Adsorption kinetics on adsorption reduction process of Au (III) also were studied. The gold metal formed was confirmed by XRD diffractogram, and photo optical microscope. The adsorption rate constant (k) with Santosa kinetics model for humic acid is 0.0065 min-1.Peaks of gold particles in the difractogram are 2 = 38, 44, and 64.
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机译：进行了泥炭土腐殖酸的分离及其在吸附还原Au（III）中的应用。从中爪哇省拉瓦彭宁市的泥炭土壤中分离出腐殖酸。从泥炭土壤中分离腐殖酸是基于常规的碱性提取方法。用0.1 M的NaOH从泥炭土中提取腐殖酸，然后用0.1 M HCl沉淀，并用0.1 M HCl / 0.3 M HF 1/1纯化。用FTIR对分离出的腐殖酸进行了表征，然后用于腐殖酸的吸附和还原反应。研究了吸附腐殖酸的吸附动力学。通过XRD衍射图和光光学显微镜确认形成的金金属。 Santosa动力学模型对腐殖酸的吸附速率常数（k）为0.0065 min-1。折光图中金颗粒的峰值为2 = 38、44和64。
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