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首页> 外文会议>International Forum on Powder Technology Application >Preconcentration and Separation Capabilities of the Modified bentonite using Dithizone for Trace Cobalt in Water
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Preconcentration and Separation Capabilities of the Modified bentonite using Dithizone for Trace Cobalt in Water

机译：使用DITHIZIZONE进行改性膨润土的预浓度和分离能力在水中痕量钴

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In this paper, a new method for the preconcentration and separation of cobalt was described. The methodology combines determined using an atomic absorption spectrometry (FAAS) with adsorption and desorption of cobalt on the modified bentonite using dithizone (Bent-dithizone). The operation conditions for the pre-concentration and separation of the cobalt, including pH, contact time, eluent condition and co-existing ions have been investigated. The result showed that the cobalt ion could be adsorbed by Bent-dithizone. The adsorption quantity was affected by the pH value of medium and shaking time. In the medium of pH 6.0, the adsorption capacity of Bent-dithizone to cobalt ion was 18.12 mg·g~(-1) when the shaking time was 15 min. The cobalt adsorbed on the adsorbent could be completely eluated and recovered using 10 g·L~(-1) EDTA solution. The enrichment factor was more than 100. The detection limit of cobalt was 0.46 ng·L~(-1). The purposed method has been applied to the pre-concentration and separation of cobalt in the water sample, the recovery 97.94%-101.6%.
机译：在本文中，描述了一种新的预浓缩和分离钴的新方法。使用原子吸收光谱法（FAAS）在使用二硫代胺（弯曲酮）的改性膨润土上的吸附和解吸来使用原子吸收光谱法（FAAS）结合。已经研究了钴的预浓度和分离的操作条件，包括pH，接触时间，洗脱液和共存离子。结果表明，钴离子可以通过弯曲酮吸附。吸附量受培养基和摇动时间的pH值的影响。在pH6.0的培养基中，当摇动时间为15分钟时，弯曲二酮与钴离子的吸附能力为18.12mg·g〜（-1）。吸附在吸附剂上的钴可以通过10g·L〜（-1）EDTA溶液完全被泄露并回收。富集因子大于100.钴的检出限为0.46ng·l〜（-1）。已经应用于水样中的钴的预浓度和分离的方法，回收率97.94％-101.6％。

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