• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of industrial and engineering chemistry >Recycling wasted scallop shell as an adsorbent for the removal of phosphate
【24h】

Recycling wasted scallop shell as an adsorbent for the removal of phosphate

机译：回收废扇贝壳作为吸附剂，用于去除磷酸盐

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

Lots of scallop shells were discharged from local restaurants and marine product manufacturers around the city of Gangneung and most of them are dumped into landfill. The scallop shell was recycled as an adsorbent for the removal of phosphate. The shell size greatly affected phosphate removal. One gram of shell having diameter of around 45 μm removed 100 mg/L of phosphate in 3 hwhile that of3 mm hardly removed in 80 h. Phosphate removal was not much affected by the pH in the range of 2.0-7.5 but it was scarcely removed beyond pH 8.0. Higher temperature was preferred for phosphate removal but the removal efficiency was almost constant over 35 °C. The maximum phosphate removal capacity was obtained through Langmuir isotherm plotting and it was as high as 23.0 mg-phosphate/g-shell. On the purpose of enhancing the adsorption capacity of scallop shell, it was treated with chemical reagents such as HCl, NaOH, NH4HCO3 and EDTA. HCl-treatment increased the adsorption capacity of the shell having diameter of 45 μm by 39.8% than raw scallop shell, but the treatment showed negligible effect on the shell of 1000 μm in diameter. Packed-bed containing HCl-treated scallop shell with 500 μm in diameter removed 20 mg/L of phosphate stably for 15 days and the removal efficiency was over 85% throughout operation.
机译：许多扇贝贝壳从江陵市附近的当地餐馆和水产品生产商处排出，其中大部分被倾倒入垃圾填埋场。扇贝壳作为吸附剂循环使用，以去除磷酸盐。壳的大小极大地影响了磷酸盐的去除。一克直径约45μm的贝壳在3小时内去除了100 mg / L磷酸盐，而在80小时内几乎未去除3 mm的磷酸盐。 pH值在2.0-7.5范围内对磷酸盐的去除影响不大，但在pH值8.0以上几乎不去除。优选较高的温度来去除磷酸盐，但是去除效率在35℃以上几乎恒定。通过Langmuir等温线图获得了最大的磷酸盐去除能力，它高达23.0 mg-磷酸盐/克-壳。为了增强扇贝壳的吸附能力，用HCl，NaOH，NH4HCO3和EDTA等化学试剂对其进行处理。 HCl处理使直径为45μm的壳的吸附能力比未加工的扇贝壳增加39.8％，但处理对直径为1000μm的壳的影响可忽略不计。装有经过HCl处理的直径为500μm的扇贝壳的填充床可稳定去除15天的20 mg / L磷酸盐，并且在整个操作过程中去除率均超过85％。

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