Adsorbents made from waste ashes and post-consumer PET and their potential utilization in wastewater treatment.
Adsorbents made from waste ashes and post-consumer PET and their potential utilization in wastewater treatment.
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DOI：
10.1016/s0304-3894(03)00208-5
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发表时间：
2003-08
影响因子：
13.6
通讯作者：
Fu-Shen Zhang;H. Itoh
中科院分区：
文献类型：
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作者：
Fu-Shen Zhang;H. Itoh
本研究以不同类型的废灰渣和废旧PET为原料，制备了低成本的吸附剂，用于工业废水的处理。将PET熔融并与灰烬共混。然后将混合物干燥以形成不同类型的吸附剂。从吸附剂中浸出的重金属大大减少相比，从散装灰浸出。吸附剂的BET比表面积为115 ~ 485 m2/g。吸附剂上的酸性位在0.84 - 1.56meq/g之间。g，高于PET炭。吸附剂对亚甲基蓝（MB）和重金属的吸附与其比表面积不一致，这是因为酸性位反应、亲和吸附和阳离子交换共同作用的结果。吸附剂对亚甲基蓝的吸附等温线可以用Langmuir或Freundlich方程很好地描述，但对重金属的吸附不能用Langmuir或Freundlich方程描述。据信，以这种方式生产的吸附剂可用于废水处理以脱色和去除重金属。
This study was carried out to prepare low-cost adsorbents from different types of waste ashes and post-consumer PET for use in industrial wastewater treatment. PET was melted and blended with ashes. The mixture was then carbonized to form different types of adsorbents. Heavy metal leaching from the adsorbents was greatly reduced compared to leaching from the bulk ashes. The BET surface area of the adsorbents ranged from 115 to 485m2/g. The acidic sites on the adsorbents varied from 0.84 to 1.56meq./g, higher than that of the PET carbon. The adsorption of methylene blue (MB) or heavy metals on the adsorbents was not in accordance with their surface areas because acidic sites reaction, affinity adsorption and cation exchange all contribute to the adsorption of the adsorbents. The isotherm for MB adsorption on the adsorbents can be well described by the Langmuir or Freundlich equation but heavy metal adsorption cannot. It is believed that the adsorbents produced in this manner can be used in wastewater treatments for discoloration and heavy metal removal.