• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Oil Palm Research >Removal Of Endosulfan From Water Using Oil Palm Shell Activated Carbon And Rice Husk Ash
【24h】

Removal Of Endosulfan From Water Using Oil Palm Shell Activated Carbon And Rice Husk Ash

机译：使用油棕壳活性炭和稻壳灰从水中去除硫丹

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, the adsorption of endosulfan, a type of pesticide, onto agricultural waste-based adsorbents, namely, oil palm shell activated carbon (PSAC) and rice husk ash (RHA), was investigated. The as-received adsorbents were used for batch a- and β-endosulfan adsorption studies which included kinetics and equilibrium aspects at a constant solution pH of 5 and at a temperature of 25℃. It was found that removal of β-endosulfan by both adsorbents was significantly more efficient than that of α-endosulfan indicating a high affinity of PSAC and RHA towards β-endosulfan. Interestingly, kinetic equilibrium for β-endosulfan adsorption onto PSAC was achieved after 30 min of contact time with a very high capacity of 418 mg g~(-1). The adsorption kinetics data fitted the pseudo-second order model well, implying chemisorption was the rate-controlling step. Equilibrium adsorption data for PSAC fit the Freundlich isotherm better than the Langmuir isotherm, suggesting the existence of multi-layer adsorption of endosulfan on a relatively heterogeneous PSAC surface. It was found that PSAC was efficient in removing β-endosulfan from water while it was conversely true for RHA.
机译：在这项研究中，研究了硫丹（一种农药）在农业废弃物基吸附剂（油棕壳活性炭（PSAC）和稻壳灰（RHA））上的吸附。按原样使用吸附剂进行α-硫丹和β-硫丹的批量吸附研究，其中包括在恒定溶液pH 5和温度25℃下的动力学和平衡方面的研究。发现两种吸附剂去除β-硫丹的效率明显高于α-硫丹，这表明PSAC和RHA对β-硫丹的亲和力高。有趣的是，在接触30分钟后，β-硫丹吸附到PSAC上的动力学平衡达到了418 mg g〜（-1）的极高容量。吸附动力学数据很好地拟合了拟二级模型，表明化学吸附是速率控制步骤。 PSAC的平衡吸附数据比Langmuir等温线更适合Freundlich等温线，表明硫丹在相对异质的PSAC表面上存在多层吸附。发现PSAC​​可有效地从水中去除β-硫丹，而对于RHA则相反。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号