腰果壳活性炭用 KOH 活化制备及其对亮绿染料的吸附：平衡等温线研究。
Adsorption of brilliant green dye onto activated carbon prepared from cashew nut shell by KOH activation: Studies on equilibrium isotherm.
机构信息
Department of Physics, Annai College of Arts and Science (Affiliated to Bharathidasan University, Trichy), Kovilacheri, Kumbakonam, 612503, Tamil Nadu, India.
Department of Forestry and Environmental Science, GKVK, University of Agricultural Sciences, Bangalore, 560065, India.
出版信息
Environ Res. 2022 Sep;212(Pt D):113497. doi: 10.1016/j.envres.2022.113497. Epub 2022 May 23.
Activated carbon from cashew nut shell via a potassium hydroxide (KOH) at 600 °C in an N atmosphere and their characteristics using FT-IR, XRD, SEM with EDS, and BET analysis was investigated. The cashew nut shell activated carbon obtained by KOH activation with a CNS/KOH ratio of 1:1 at 600 °C (N atmosphere) for 2 h had the highest surface area (407.80 m/g) as compared to other ratio samples. Amongst, CNS/KOH ratios of 1:1 sample are used for the adsorbent, they are effects of contact time, pH, adsorbent dose, and initial dye concentration on brilliant green (BG) removal efficiency were studied. Moreover, the Langmuir and Freundlich adsorption models consisted utilized to affirm the adsorption isotherms. They are, best fitting for BG experimental equilibrium data was achieved with the Langmuir isotherm, giving a maximum BG adsorption capacity of 243.90 mg/g.
通过在 N 气氛中于 600°C 下用氢氧化钾 (KOH) 对腰果壳进行活化，得到了活性炭，并利用 FT-IR、XRD、SEM-EDS 和 BET 分析对其特性进行了研究。与其他比例的样品相比，用 CNS/KOH 比为 1:1（在 600°C（N 气氛）下 2 小时）的 KOH 活化得到的腰果壳活性炭的比表面积最高（407.80 m/g）。在研究了接触时间、pH 值、吸附剂用量和初始染料浓度对亮绿（BG）去除效率的影响后，选用 CNS/KOH 比为 1:1 的样品作为吸附剂。此外，还利用 Langmuir 和 Freundlich 吸附模型来确定吸附等温线。结果表明，BG 实验平衡数据与 Langmuir 等温线拟合最好，最大 BG 吸附容量为 243.90 mg/g。
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