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Adsorptive removal of Hg2+ from environmental water samples using thioglycerol-intercalated magnetic layered double hydroxides
Analytical Methods ( IF 2.7 ) Pub Date : 2020-04-01 , DOI: 10.1039/d0ay00448k Ali Esrafili 1, 2 , Mahnaz Ghambarian 3 , Mohammad Tajik 4 , Mahroo Baharfar 5
Analytical Methods ( IF 2.7 ) Pub Date : 2020-04-01 , DOI: 10.1039/d0ay00448k Ali Esrafili 1, 2 , Mahnaz Ghambarian 3 , Mohammad Tajik 4 , Mahroo Baharfar 5
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Herein, the removal of Hg2+ from environmental water samples was carried out using a novel nanoadsorbent based on magnetite nanoparticles coated by a thioglycerol-intercalated layered double hydroxide. The prepared material was characterized using scanning electron microscopy equipped with an energy dispersive X-ray analyzer and Fourier transform infrared spectrometry. The effective parameters of the removal procedure were identified and optimized through the one-variable-at-a-time method. Under the optimal conditions, the removal characteristics of the synthesized adsorbent including selectivity, distribution coefficient, and loading capacity were calculated in the presence of some interfering ions. The removal efficiency of 94.98% together with the distribution coefficient of 5.00 × 105 mL g−1 and loading capacity of 480.69 mg g−1 showed the considerable capability of this novel adsorbent in the selective removal of Hg2+ from aqueous samples. To evaluate the performance of the synthesized adsorbent in the removal of Hg2+ from environmental water samples, the removal of the desired analyte was carried out using four different real samples. The removal procedures were conducted at the analyte concentration levels of 10.0 and 50.0 mg L−1 for each aqueous sample. The obtained results showed that the removal efficiency was in the range of 91.99–94.97%, which confirmed the high performance of the synthesized adsorbent in the removal of Hg2+ from real samples. Furthermore, the relative standard deviation of as low as 4.18–6.17% showed the acceptable repeatability of this method.
中文翻译：
硫代甘油插层磁性层状双氢氧化物吸附去除环境水样中的 Hg2+
在此，从环境水样中去除Hg 2+是使用一种新型纳米吸附剂进行的，该吸附剂基于由硫代甘油插层的层状双氢氧化物包覆的磁铁矿纳米颗粒。使用配备能量色散 X 射线分析仪和傅里叶变换红外光谱仪的扫描电子显微镜对制备的材料进行表征。通过一次一个变量的方法识别和优化去除过程的有效参数。在最佳条件下，计算了在一些干扰离子存在下合成吸附剂的去除特性，包括选择性、分配系数和负载量。去除效率94.98%，分配系数5.00×10 5mL g -1和 480.69 mg g -1的负载能力表明这种新型吸附剂在从水样中选择性去除 Hg 2+方面具有相当大的能力。为了评估合成吸附剂从环境水样中去除 Hg 2+的性能，使用四种不同的实际样品去除所需分析物。对于每个水性样品，在 10.0 和 50.0 mg L -1的分析物浓度水平下进行去除程序。结果表明，去除效率在91.99-94.97%之间，证实了合成的吸附剂在去除Hg 2+方面的高性能。来自真实样本。此外，低至 4.18-6.17% 的相对标准偏差表明该方法的可重复性可接受。
更新日期：2020-04-01
中文翻译：
硫代甘油插层磁性层状双氢氧化物吸附去除环境水样中的 Hg2+
在此，从环境水样中去除Hg 2+是使用一种新型纳米吸附剂进行的，该吸附剂基于由硫代甘油插层的层状双氢氧化物包覆的磁铁矿纳米颗粒。使用配备能量色散 X 射线分析仪和傅里叶变换红外光谱仪的扫描电子显微镜对制备的材料进行表征。通过一次一个变量的方法识别和优化去除过程的有效参数。在最佳条件下，计算了在一些干扰离子存在下合成吸附剂的去除特性，包括选择性、分配系数和负载量。去除效率94.98%，分配系数5.00×10 5mL g -1和 480.69 mg g -1的负载能力表明这种新型吸附剂在从水样中选择性去除 Hg 2+方面具有相当大的能力。为了评估合成吸附剂从环境水样中去除 Hg 2+的性能，使用四种不同的实际样品去除所需分析物。对于每个水性样品，在 10.0 和 50.0 mg L -1的分析物浓度水平下进行去除程序。结果表明，去除效率在91.99-94.97%之间，证实了合成的吸附剂在去除Hg 2+方面的高性能。来自真实样本。此外，低至 4.18-6.17% 的相对标准偏差表明该方法的可重复性可接受。
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