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首页> 外文期刊>Journal of Hazardous Materials >Tamarind (Tamarindus indica) fruit shell carbon: A calcium-rich promising adsorbent for fluoride removal from groundwater
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Tamarind (Tamarindus indica) fruit shell carbon: A calcium-rich promising adsorbent for fluoride removal from groundwater

机译：罗望子（Tamarindus indica）果壳碳：一种富含钙的有前途的吸附剂，可用于去除地下水中的氟化物

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摘要

Tamarindus indica fruit shells (TIFSs) are naturally calcium rich compounds. They were impregnated with ammonium carbonate and then carbonized, leading to ammonium carbonate activated ACA-TIFS carbon. The resulting materials and carbon arising from virgin fruit shells V-T1FS were characterized and assayed as adsorbent for the removal of fluoride anions from groundwater. The fluoride scavenging ability of T1FS carbons was due to naturally dispersed calcium compounds. X-ray diffraction (XRD) showed that TIFS carbon contained a mixture of calcium oxalate and calcium carbonate. Batch studies on the fluoride removal efficiency of TIFS carbons with respect to contact time, pH, initial fluoride concentration, and co-ion interference were conducted. Applicability of various kinetic models (viz., pseudo-first-order, pseudo-second-order, intra-particle diffusion and Elovich) and sorption isotherms were tested for batch techniques. The fluoride removal capacity of TIFS carbons was found to be 91% and 83% at a pH of 7.05 for V-TIFS and ACA-TIFS carbons, respectively. The practical applicability of TIFS carbons using groundwater samples was approved. The fluoride removal was greater in groundwater without hydrogen carbonate ions than those containing these ions. The characterizations of fluoride unloaded and loaded TIFS carbons were done by SEM and XRD studies.
机译：罗望子in果壳（TIFS）是天然的富含钙的化合物。它们用碳酸铵浸渍，然后碳化，得到碳酸铵活化的ACA-TIFS碳。对初生果壳V-T1FS产生的物质和碳进行了表征，并将其作为吸附剂进行了分析，以从地下水中去除氟离子。 T1FS碳的除氟能力是由于自然分散的钙化合物。 X射线衍射（XRD）显示TIFS碳包含草酸钙和碳酸钙的混合物。批量研究了TIFS碳相对于接触时间，pH，初始氟化物浓度和共离子干扰的除氟效率。对于批处理技术，测试了各种动力学模型（即伪一阶，伪二阶，粒子内扩散和Elovich）和吸附等温线的适用性。发现在pH为7.05时，V-TIFS和ACA-TIFS碳的TIFS碳的除氟能力分别为91％和83％。批准了TIFS碳使用地下水样品的实际适用性。没有碳酸氢根离子的地下水中的氟化物去除量大于含有这些离子的地下水中的氟化物去除量。通过SEM和XRD研究完成了未装载和装载TIFS碳的氟化物的表征。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.164-172|共9页
  • 作者

    V. Sivasankar; S. Rajkumar; S. Murugesh; A. Darchen;

  • 作者单位

    Department of Chemistry, Thiagarajar College of Engineering (Autonomous), Madurai 625015, Tamil Nadu, India;

    Department of Chemistry, Thiagarajar College of Engineering (Autonomous), Madurai 625015, Tamil Nadu, India;

    Department of Chemistry, SACS M.A.V.M.M. Engineering College, Madurai 625301, Tamil Nadu, India;

    UMR CNRS No. 6226 Sciences Chimiques de Rennes, ENSCR, Avenue du General Leclerc, CS 50837,35708 Rennes, Cedex 7, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated carbon; adsorption; calcium oxalate; calcium carbonate; defluoridation;

    机译：活性炭;吸附草酸钙;碳酸钙脱氟;

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