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首页> 外文期刊>Journal of industrial and engineering chemistry >Comparison of the efficiency of modified clinoptilolite with HDTMA and HDP surfactants for the removal of phosphate in aqueous solutions
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Comparison of the efficiency of modified clinoptilolite with HDTMA and HDP surfactants for the removal of phosphate in aqueous solutions

机译：改性斜发沸石与HDTMA和HDP表面活性剂去除水溶液中磷酸盐的效率比较

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摘要

Clinoptilolite (CP) and its modified forms with two cationic surfactants (HDTMA-Br and HDP-Br) were used to remove phosphate as an important anionic environmental contaminant using batch and continuous methods. The modification was analyzed by FT-IR and DTG characterization techniques. The effects of some interfering anions on the removal extent of phosphate were investigated and more interference was observed by arsenate so the removal extent of phosphate decreased to 0.3 mmol/kg. The removal efficiency of phosphate confirmed that HDTMA-modified zeolite (SMZ-HDTMA) was more efficient than HOP-modified zeolite (SMZ-HDP). Delta G values of -6.4, -9.5 and -12.0 kJ/mol for the raw CP, SMZ-HDP and SMZ-HDTMA, respectively, confirm that the removal reaction of phosphate is spontaneous for the raw and modified sorbents. Results of study of pH showed that stronger basic pHs are suitable for removal of phosphate by the raw and modified adsorbents so the removal efficiencies of 8.1, 376 and 675 mmol/kg were, respectively, obtained for CP, SMZ-HDP and SMZ-HDTMA at pH 12. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：斜发沸石（CP）及其与两种阳离子表面活性剂（HDTMA-Br和HDP-Br）的修饰形式用于通过分批和连续方法除去作为重要阴离子环境污染物的磷酸盐。通过FT-IR和DTG表征技术分析了修饰。研究了一些干扰阴离子对磷的去除程度的影响，砷对砷的去除影响更大，因此磷的去除程度降低至0.3 mmol / kg。磷酸盐的去除效率证实了HDTMA改性的沸石（SMZ-HDTMA）比HOP改性的沸石（SMZ-HDP）更有效。原始CP，SMZ-HDP和SMZ-HDTMA的Delta G值分别为-6.4，-9.5和-12.0 kJ / mol，这证​​实了原始和改性吸附剂的磷酸盐去除反应是自发的。 pH值的研究结果表明，较强的碱性pH值适合通过原始和改性吸附剂去除磷酸盐，因此CP，SMZ-HDP和SMZ-HDTMA的去除效率分别为8.1、376和675 mmol / kg。 pH值为12。（C）2015韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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