有机-无机-磁性树脂对微污染水源水中腐殖酸的吸附性能研究

以有机化磁性凹凸棒土(M-ATP)制备有机-无机-磁性三效性能树脂(MPR)。利用扫描电镜、傅里叶变换红外光谱等对树脂形貌和结构进行表征,考察了树脂对腐殖酸(HA)的吸附性能。结果表明,超声分散法制备的样品(UD-MPR)溶胀态下有效比表面积为674.31 m^2/g,M-ATP的最佳添加量为8%(m/m)。UD-MPR对HA的吸附符合二级动力学模型,平衡时间为233 min。当HA初始浓度为14.87 mg/L时,吸附量达13 mg/g。对Langmuir及Freundlich等温吸附模型拟合度均较高。热力学参数(ΔH~θ,ΔS~θ,ΔG~θ)测定结果表明,UD-MPR吸附HA是自发吸热的反应,乙酸对吸附过程影响较大。吸附剂可循环使用,重复使用6次,吸附性能没有明显变化。

梁下大直径盘扣式高支模预压实时监测与分析

探讨了盘扣式高支模预压方法,设计了高支模预压时间和预压荷载,采用远程实时模架监测系统对选定模架立杆监测点变形数据进行了采集。数据分析表明,整个监测过程中所有测点变形均没有超过规范规定,模架安全可靠并被后期浇筑混凝土工程所验证,研究结论可为房建工程模板支撑架预压方法和变形实时监测提供参考。

祁连清泉羊羔肉中肌苷酸含量的测定

祁连清泉羊羔肉产自于祁连山下的玉门市清泉乡境内,是甘肃省河西走廊地区有名的特产。本试验以清泉羊肉为研究对象,运用高效液相色谱法(HPLC)测定了其主要风味物质肌苷酸的含量,并与平川、玉门羊羔肉进行比较。结果表明:清泉、玉门和平川羊羔肌肉(鲜肉)中肌苷酸含量分别为4.0925g/kg,3.6424g/kg,3.8701g/kg;黄焖处理的清泉、玉门和平川羊羔肌肉中肌苷酸含量分别为2.3748g/kg,2.1952g/kg,1.6924g/kg;清炖处理的清泉、玉门和平川羊羔肌肉中肌苷酸含量分别为2.9417g/kg,1.2649g/kg,1.1254g/kg;白条处理(手抓)的清泉、玉门和平川羊羔肌肉中肌苷酸含量分别为1.8795g/kg,1.1052g/kg,1.4269g/kg。清泉羊羔肉中的肌苷酸含量要显著高于玉门和平川的羊羔肉中的含量。

Research on the Adsorption of Methylene Blue with Rice Husk Ash Aided by Ion Beam Etching Technique

[Objective] The aim was to study the mechanism of the removal effect of methylene blue(MB) by rice husk ash(RHA).[Method] The effects of contact time and pH on the adsorption of MB by rice husk ash were investigated,and the mechanism was discussed.[Result] RHA exhibited a remarkable ability on the adsorption of MB.The process of adsorption reached the equilibrium after 30 min,at about pH 9.The adsorption effect was explored with the aid of ion beam etching technique,which displayed that there were two main adsorption manners.One was the electrostatic interactions,through which the negatively charged RHA could adsorb the positively charged MB,the other was the porous effect due to the huge specific surface area of the micro/nano-scale porous silica in RHA,and MB could be adsorbed and deposited into the pores.[Conclusion] RHA could be used in the treatment of textile wastewater.Ion beam technology might be used as an effective way to investigate the adsorption effect.