环境工程专业《膜分离技术及应用》课程建设

面向环境工程专业开设《膜分离技术与应用》特色选修课程建设,通过对该课程的教学内容的组织、教学方法的应用以及教学课程的建设等方面都进行了有益的尝试,构建了新颖的膜分离技术及应用的课程体系和完善了教学方式,初步取得了良好的教学效果,受到了学生的好评,但有些方面仍需要在今后的教学实践中进一步改进优化。     

浅谈环境工程专业本科毕业论文指导过程中的“六结合”

毕业设计（论文）是本科教学计划的最后的和最重要的一个实践性环节,在多年来指导环境工程专业毕业论文的教学实践过程中,针对提高毕业论文质量的目标进行了有益探索,提出了“六结合”的改革举措和实施思路。指导实践表明,指导的环境工程专业毕业论文的总体质量有了明显提高。     

微波与超声波技术制备生物柴油的研究进展

微波与超声波技术辅助制备生物柴油与传统的酸、碱催化法以及酶催化法等技术相比具有反应时间短、催化荆用量明显降低,生物柴油的转化率大大提高等优点.本文综述了超声波技术、微波技术的特点及合成生物柴油的应用现状,并对其影响因素进行了简要阐述,以及概述了外界条件辅助存在的问题和研究发展方向.     

无N2下合成钠基膨润土/P(AA-AM)复合吸水树脂的研制

以N,N'-亚甲基双丙烯酰胺为交联剂,过硫酸钾为引发剂,丙烯酸(AA)和丙烯酰胺(AM)为单体,采用水溶液聚合法合成出钠基膨润土复合聚丙烯酸钠-丙烯酰胺复合吸水树脂.研究了钠基膨润土的添加量、交联剂用量、引发剂用量、中和度及AM的用量对吸水倍率的影响.结果表明,钠基膨润土用量为40%,交联剂用量为0.025%,引发剂用量为0.3%,AM用量为12%及AA的中和度为80%时,吸蒸馏水倍率与吸收0.7%NaCl溶液倍率分别为422.28 g/g和65.80 g/g.     

不同膨润土对模拟酒溶液中蛋白质的吸附

The adsorption of protein from model wine was investigated under different temperatures, pH values, contact times, and concentrations of ethanol, by certain bentonites. The results showed that ethanol molecules could broaden the protein molecules＇ channel to the interlayer of bentonite, and the maximum protein adsorption amount occurred under an ethanol concentration of 12% （by volume） and a pH value of 3.56. The increased single point Brunauer-Emmitt-Teller （BET） surface area （SBET） and adsorption pore volume （VAds） suggested a larger amount of active adsorption sites of the bentonite surface and a wider protein channel from the surface to the inner adsorption sites of bentonite, respectively. At the same time, higher methylene blue test （MBT） and swelling index （Sw） indicated that it was easy for the entrance of water and the absorbance of protein. Higher temperature was found favorable to eliminate more proteins and it took about 20 to 40min to arrive at the maximum adsorption.     

高效液相色谱法(HPLC)快速检测辣椒中的辣椒红素

建立了辣椒中辣椒红色素的高效液相色谱法定性定量检测方法。结果表明,采用v(正己烷)v∶(丙酮)=782∶2为最佳流动相,检测波长475nm,分析柱Shim-pack CLC-SIL(M)(150×4.6mmID),流速:0.8mL/min,柱温40℃,使辣椒红色素在10min内得到了较好的分离。线性范围为0.022￣0.176mg/mL,r=0.9994,平均回收率为99.17%,变异系数为1.63%(n=5),最小检测限为10ng。该方法具有简单快速、精密度高等优点。     

食品的冰温贮藏保鲜技术及其应用

近年来，随着经济的发展、生活水平的提高，消费者对食品的品质要求越来越高，一门新的食品贮藏保鲜技术——冰温贮藏（Controlled Freezing Point）保鲜技术正在兴起，其显著的优点是能够长期有效地保持食品固有的风味和新鲜度，满足了消费者对食品的品质要求，在农产品的贮藏保鲜方面是其它贮藏技术所不能代替的，     

超声波改性有机膨润土及其对苯的吸附研究

为了提高有机膨润土对苯的吸附能力,采用超声波辐照处理膨润土改性合成有机膨润土.通过研究不同的改性条件对苯吸附量的影响,获得了最佳工艺条件为:超声处理时间20min、固液比1:10、十六烷基三甲基溴化铵(HTAB)加量120mmol/100g及超声波功率600 W.在此条件下制备的有机膨润土对苯的吸附平衡研究表明,在开始30rain内吸附非常快,吸附150min后基本达到吸附平衡,其对苯的吸附量达51.28mg/g.     

活性白土对模拟油脂中β-胡萝卜素和叶绿素的吸附动力学研究

The textural properties of acid-activated bentonite (AAB), which were prepared using four different concentrations of sulfuric acid, were analyzed by adsorption-desorption isotherm of nitrogen using an automated specific surface area and porosity analyzer. The total pore volume, specific surface area and average pore diameter of these four kinds of AAB show a regular changing trend, increasing first and then decreasing, the optimum of which can be achieved at a sulfuric acid concentration of 25% (sample A25). The kinetic analysis of the adsorption ofβ-carotene and chlorophyll in model oil solutions, namely, xylene and edible oil solution, has been investigated by using AAB. Experimental results indicated that the adsorption data fit the pseudo-second-order model well. The whole adsorption process of the two pigments on AAB was divided basically into two parts the initial adsorption of pigments was rapid in the first 10 min, followed by a slower adsorption process till equilibrium was attained at 60 min. In addition, the amount and rate of adsorption on A25 increase synchronously with the initial pigment concen-tration and temperature. The results showed that the adsorption kinetics behavior of AAB with respect to the pig- ments is not influence by the xylene and edible oil solution.     

活性白土对油脂溶液中叶绿素的吸附行为研究

利用活性白土(AAB)对油脂溶液中叶绿素进行吸附,深入探讨了叶绿素在AAB上吸附的动力学及热力学行为.结果表明,Freundlich等温吸附方程能够较好地拟合吸附等温线.叶绿素在AAB上的吸附能够在较短的时间内达到平衡,温度升高有利于提高吸附速率和吸附客量,动力学特性符合准二级动力学方程,此吸附是一个吸热的自发过程.