Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI-Depok, Depok, 16424, Indonesia.
Department of Chemistry, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE1410, Brunei.
Environ Monit Assess. 2019 Jul 10;191(8):488. doi: 10.1007/s10661-019-7634-6.
This paper presents the adsorption capacity of a biosorbent derived from the inner part of durian (Durio zibethinus) rinds, which are a low-cost and abundant agro-waste material. The durian rind sorbent has been successfully utilized to remove lanthanum (La) and yttrium (Y) ions from their binary aqueous solution. The effects of several adsorption parameters including contact time, pH, concentrations of La and Y, and temperature on the removal of La and Y ions were investigated. The adsorption isotherm and kinetics of the metal ions were also evaluated in detail. Both La and Y ions were efficiently adsorbed by the biosorbent with optimum adsorption capacity as high as 71 mg La and 35 mg Y per gram biosorbent, respectively. The simultaneous adsorption of La and Y ions follows Langmuir isotherm model, due to the favorable chelation and strong chemical interactions between the functional groups on the surface of the biosorbent and the metal ions. The addition of oxygen content after adsorption offers an interpretation that the rare-earth metal ions are chelated and incorporated most probably in the form of metal oxides. With such high adsorption capacity of La and Y ions, the durian rind sorbent could potentially be used to treat contaminated wastewater containing La and Y metal ions, as well as for separating and extracting rare-earth metal ions from crude minerals.
本文介绍了一种从榴莲（Durio zibethinus）内果皮中提取的生物吸附剂的吸附能力，榴莲内果皮是一种低成本、丰富的农业废料。该榴莲皮吸附剂已成功用于从二元水溶液中去除镧（La）和钇（Y）离子。研究了接触时间、pH 值、La 和 Y 浓度以及温度等几个吸附参数对 La 和 Y 离子去除的影响。还详细评估了金属离子的吸附等温线和动力学。生物吸附剂能够有效地吸附 La 和 Y 离子，其最佳吸附容量分别高达每克生物吸附剂 71mg La 和 35mg Y。La 和 Y 离子的同时吸附符合 Langmuir 等温线模型，这是由于表面上的功能基团与金属离子之间的有利螯合作用和强化学相互作用。吸附后氧含量的增加表明，稀土金属离子可能以金属氧化物的形式被螯合和掺入。由于具有如此高的 La 和 Y 离子吸附能力，榴莲皮吸附剂可能被用于处理含有 La 和 Y 金属离子的污染废水，以及从粗矿石中分离和提取稀土金属离子。
