On the practicability of a new bio sorbent: Lasani sawdust and coconut coir for cleanup of oil spilled on water

In this article, two bio-sorbents have been selected: lasani sawdust (LS) (a new bio-based material) and coconut coir (CC) for the removal of used motor oil from the aqueous phase. The physical nature of the materials was characterized using Fourier Transform Infrared Spectroscopy and Constitutional Analysis of lignin and cellulose. The adsorption process was evaluated using various kinetic and adsorption models. The evaluated sorption capacities for coconut coir and lasani sawdust were 12.82?g g^?1 and 0.36?g g^?1, respectively. Maximum sorption of oil from the aqueous solution conveniently took place in 20?minutes. To ascribe statistically which model describes the adsorption phenomenon best, Root Mean Square Error (RMSE) and Average Relative Error (ARE) were used. The kinetics of the adsorption was best described by Pseudo-second order. Similarly, Langmuir isotherm model had the least value for the two error functions and a higher q_max value for coir than for lasani. It was concluded that the increased absorptive ability of coir over lasani was due to the difference in the composition of lignin and cellulose of the two materials.     

改良水剂法对脱色废白土油脂回收效果研究

采用表面活性剂与传统水剂法相结合方法对回收脱色废白土油脂效果进行研究.试验结果表明,回收脱色废白土油脂最优工艺为:碳酸钠添加量0.3％、提取温度95℃、提取时间35 min、表面活性剂为OS-15,在此条件下,脱色废白土油脂回收率可达96.72％.     

Evaluation of the effect of a novel membrane filtration system on the lifespan of frying oil

Frying oil has a limited lifetime which results in the disposal of approximately 67% of all used oil. The aim of this study is to determine the suitability of different membranes for purifying frying oil and investigate the application of continuous membrane filtration in a commercial deep fryer. Eleven different membranes were tested to assess their suitability for filtrating frying oil. A prototype continuous filtration system with an integrated membrane filter was developed for a deep fryer to assess the effect of continuous membrane filtration on oil degradation. The prototype was subjected to a frying test over 13 days and the results compared to those from a standard deep fryer. The prototype maintained total polar compounds (TPC) at an acceptable level of <12% and the oil remained light in colour even after more than 280 h of use, while TPC in the standard deep fryer rose to >27%.     

圆筒形小型高效沼气池钢模设计精要

用钢模修建沼气池是快速规范化建设沼气池的好方法 ,本文阐述了笔者在实践中对普遍采用的圆筒形小型高效沼气池钢模设计的精要点 ,包括重要的设计原则、结构方案及设计参数     

仪表圆弧齿轮CAD系统

仪表圆弧齿轮ＣＡＤ系统，集齿形设计、齿轮刀具设计、齿轮检验样板制作于一身，在完成上述设计的同时，完成相应的工程绘图。该系统设计速度快、精度高，输入、输出经汉化处理，使用方便，操作简单。     

山体滑坡监测仪的电源设计

山体滑坡监测仪是一种新型的地质监测仪器，它能够及时、快速地监测出山体的滑动情况。本文介绍了一种由太阳能电池和蓄电池联合供电的电源设计方案，分析了电路的工作原理和器件的选择等问题。     

纵缝焊接升降平台的开发及利用

介绍了一种解决筒体埋弧自动焊接工作的纵逢升降平台,它可实现流水作业,降低了成本,提高了工效。     

橡胶用C5/C9共聚石油树脂合成新工艺初探

用高温热聚合工艺替代传统阳离子聚合工艺生产橡胶用C5/C9共聚石油树脂.     

聚丙烯纤维超高强石渣混凝土的力学性能研究

低碳聚丙烯纤维超高强石渣混凝土是利用地方原材料自主研发的强度高达134．9MPa、水泥消耗量低至350kgm-3且具有优异抗火性能的新型环境友好型混凝土。文章进行了11组立方体试件和8组棱柱体试件的抗压试验、9组劈拉试验和8组抗折试验,初步研究了聚丙烯纤维超高强石渣混凝土的力学性能。试验结果表明,在试验参数范围内,聚丙烯纤维超高强石渣混凝土与超高强石渣混凝土的力学特性有其相似之处,也有其自身的特点：在受压变形过程中,泊桑比几乎保持不变,由于聚丙烯纤维的阻裂效应,泊桑比小于超高强石渣混凝土,为0．244;拉压比在1／10．3—1／17．8之间;折压比为1／9．9—1／15．5;变形模量与超高强石渣混凝土相近,在14461MPa-16339MPa之间,小于超高强混凝土数值。