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首页> 外文期刊>Analytica chimica acta >Synthesis,characterization and application of a novel sorbent,glucamine-modified MCM-41,for the removal/preconcentration of boron from waters
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Synthesis,characterization and application of a novel sorbent,glucamine-modified MCM-41,for the removal/preconcentration of boron from waters

机译：新型吸附剂葡糖胺修饰的MCM-41的合成，表征及应用，用于水中的硼的去除/预浓缩

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摘要

A novel sorbent was prepared by the functionalization of an inorganic support material,MCM-41,with N-methylglucamine for the uptake of boron from aqueous solutions prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES).Characterization of the newly synthesized material was performed using BET,XRD,TEM,SEM and DRIFTS techniques,in addition to its C and N elemental content.Sorption behavior of the novel sorbent for boron was also investigated and found to obey Freundlich and Dubinin-Radushkevich (D-R) isotherm models.The maximum amount of B (as H_3BO_3) that can be sorbed by the sorbent was calculated from the D-R isotherm and was found to be 0.8 mmol B g~(-1) of sorbent.The applicability of the new sorbent for the removal/preconcentration of boron from aqueous samples was examined by batch method.It was found that the sorbent can take up 85% of boron in 5 min whereas quantitative sorption is obtained in 30 min.Any pH greater than 6 can be used for sorption.Desorption from the sorbent was carried out using 1.0M HNO_3.The sorption efficiency of the new sorbent was also compared to that of Amberlite IRA 743,a commercial resin with 7V-methylglucamine functional groups.Within the experimental conditions employed,the new sorbent was found to have higher sorption efficiency than the commercial resin.For method validation,spike recovery tests were performed at various concentration levels in different water types and were found to be between 83-95 and 75-92% for ultra pure water and geothermal water,respectively.
机译：通过用N-甲基葡糖胺对无机载体材料MCM-41进行功能化来制备新型吸附剂，然后通过电感耦合等离子体发射光谱法（ICP-OES）测定水溶液中的硼。用BET，XRD，TEM，SEM和DRIFTS技术对新合成的材料进行了测定，除了其C和N的元素含量。还研究了新型吸附剂对硼的吸附行为，发现其符合Freundlich和Dubinin-Radushkevich（DR）根据DR等温线计算出吸附剂可吸附的最大B量（以H_3BO_3计），为0.8 mmol B g〜（-1）吸附剂。采用分批法检测了水样中硼的去除/预富集，发现吸附剂在5分钟内可吸收85％的硼，而在30分钟内可实现定量吸附，任何大于6的pH均可使用使用1.0M HNO_3进行吸附剂的解吸。还将新吸附剂的吸附效率与具有7V-甲基葡糖胺官能团的市售树脂Amberlite IRA 743进行了比较。吸附剂比市售树脂具有更高的吸附效率。为进行方法验证，对不同水类型在不同浓度下进行了加标回收试验，发现超纯水和地热的回收率在83-95％至75-92％之间水。

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