ABSTRACT

This study aims to utilise rambutan peel waste and convert it into hydrochar then applied as an adsorbent to remove Fe(II) contaminants from aqueous solutions. Rambutan peel hydrochar (RP-HC) was prepared by hydrothermal treatment of raw RP at 200 °C. The prepared samples were characterised using XRD, FT-IR, BET, and SEM. The sample contains a lot of -NH and -OH active sites which will affect the performance of crude RP-HC and RP as adsorbents for the removal of Fe(II) from aqueous solutions. The results of the adsorption study showed that the adsorption of Fe(II) using RP-HC had a maximum adsorption capacity of 25.126 mg/L, while the RP was 14.553 mg/L and the adsorbent regeneration study showed that the adsorption effectiveness of RP and RP-HC was stable until the third cycle.

摘要

本研究旨在利用红毛丹果皮废料并将其转化为水炭，然后用作吸附剂以去除水溶液中的 Fe(II) 污染物。红毛丹果皮水炭（RP-HC）是通过在 200 °C 下对原料 RP 进行水热处理而制备的。使用 XRD、FT-IR、BET 和 SEM 对制备的样品进行了表征。样品中含有大量的-NH 和-OH 活性位点，这将影响粗RP-HC 和RP 作为吸附剂去除水溶液中Fe(II) 的性能。吸附研究结果表明，RP-HC对Fe(II)的吸附最大吸附量为25.126 mg/L，而RP为14.553 mg/L，吸附剂再生研究表明，RP的吸附效果较好。并且 RP-HC 在第三个周期之前是稳定的。