用稻壳从水中吸附原油和发动机油。
Adsorption of crude and engine oils from water using raw rice husk.
机构信息
Department of Natural Resources, Isfahan University of Technology, Isfahan 8415683111, Iran E-mail:
Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran.
出版信息
Water Sci Technol. 2014;69(5):947-52. doi: 10.2166/wst.2013.804.
The raw rice husk (RRH) was used as a low cost adsorbent to remove three oil compounds with different viscosities (crude oil, engine oil and spent engine oil) from an aqueous environment. Some of the sorbent specifications were characterized using a CHNSO analyzer, Fourier transform infrared, scanning electron microscope and inductively coupled plasma spectroscopy. With decreasing RRH particles size, the oil adsorption percentage was reduced for crude, spent and engine oils from 50 to 30%, 65 to 20% and 70 to 0.01%, respectively. This was probably due to damage of the microcavities. The removal percentage by sorbent at optimized conditions was 88, 80 and 55% for engine, spent and crude oils, respectively, corresponding to their descending viscosity. The adsorption of crude and spent oils on rice husk followed the Freundlich isotherm model, while the adsorption of engine oil was fitted by the Langmuir model. The maximum adsorption capacity (qmax), calculated from the Langmuir model for the adsorption of engine oil on RRH, was 1,250 mg/g.
稻壳原糠（RRH）被用作一种低成本的吸附剂，用于从水相中去除三种具有不同粘度的油类化合物（原油、发动机油和废机油）。使用 CHNSO 分析仪、傅里叶变换红外光谱、扫描电子显微镜和电感耦合等离子体光谱对部分吸附剂特性进行了表征。随着 RRH 颗粒尺寸的减小，对于原油、废机油和发动机油，油的吸附百分比分别从 50%降至 30%、从 65%降至 20%和从 70%降至 0.01%。这可能是由于微腔的损坏所致。在最佳条件下，吸附剂对发动机油、废机油和原油的去除率分别为 88%、80%和 55%，这与它们逐渐降低的粘度相对应。稻壳对原油和废机油的吸附遵循弗雷德里希等温线模型，而发动机油的吸附则符合朗缪尔模型。根据朗缪尔模型计算出的发动机油在 RRH 上的最大吸附容量（qmax）为 1,250mg/g。
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