Pabón Santiago Eduardo, Benítez Benítez Ricardo, Sarria Villa Rodrigo, Gallo Corredor José Antonio
University of Cauca, Department of Chemistry, Environmental Analytical Chemistry Research Group (GIQA), Career 3 No. 3N-100, Popayán 190002, Colombia.
University of Cauca, Department of Chemistry, Chemistry of Natural Products (QPN), Career 3 No. 3N-100, Popayán 190002, Colombia.
Heliyon. 2022 Nov 5;8(11):e11429. doi: 10.1016/j.heliyon.2022.e11429. eCollection 2022 Nov.
Artisanal mining is the main source of mercury emissions in South America, which generates a serious environmental impact due to this toxic metal, recent research is directed to minimize the impact, therefore this study focuses on the green synthesis of nanoparticles for the absorption of mercury in water. For the synthesis of iron nanoparticles, an extract of was used with iron chloride salts using water as solvent. The synthesized nanoparticles showed a specific surface area of 131.90 m/g, determined by Brunauer-Emmett-Teller isotherm (BET). Nanoparticles were characterized by Fourier transformed infrared spectroscopy (FTIR) and transmission electron microscopy (MET). The behavior of nanoparticles synthesized during Hg (II) retention was evaluated measuring pH, temperature, nanoparticle dosing, presence of other ions and comparing with other adsorbents. All analyses measured by atomic absorption spectroscopy by the cold vapor technique (CVAAS), presenting a retention percentage for Hg (II) between 75.05 and 79.59% with pH between 4 and 7. The adsorption isothermal was adjusted to the Freundlich model and the percentage of retention of Hg by the synthesized nanoparticle was 79.26%. This work shows a method for obtaining an environmentally friendly mercury adsorbent from iron and with a mercury retention capacity comparable to commercial adsorbents.
手工采矿是南美洲汞排放的主要来源，这种有毒金属会产生严重的环境影响，近期的研究旨在将影响降至最低，因此本研究聚焦于用于吸收水中汞的纳米颗粒的绿色合成。为了合成铁纳米颗粒，使用了[提取物名称]的提取物与氯化铁盐，以水作为溶剂。通过布鲁诺尔-埃米特-泰勒等温线（BET）测定，合成的纳米颗粒比表面积为131.90 m/g。通过傅里叶变换红外光谱（FTIR）和透射电子显微镜（MET）对纳米颗粒进行了表征。通过测量pH值、温度、纳米颗粒剂量、其他离子的存在情况，并与其他吸附剂进行比较，评估了合成的纳米颗粒在汞（II）保留过程中的行为。所有分析均采用冷蒸气技术的原子吸收光谱法（CVAAS）进行测量，在pH值为4至7时，汞（II）的保留率在75.05%至79.59%之间。吸附等温线符合弗伦德利希模型，合成纳米颗粒对汞的保留率为79.26%。这项工作展示了一种从铁和[提取物名称]中获得环保型汞吸附剂的方法，其汞保留能力与商业吸附剂相当。
