离子液体[Bmim]Cl对HepG2细胞糖代谢的影响

离子液体是一类广泛用于生产、科研的有机溶剂,其生物毒性已被验证,然而在非致死浓度下离子液体对于生物体的潜在影响还有待研究.为探究离子液体对糖代谢的影响,选取人体肝癌细胞HepG2为受试对象进行体外实验,研究一种常用的咪唑类离子液体1-丁基-3-甲基咪唑氯盐([Bmim]Cl)对HepG2细胞糖代谢的影响.结果表明,[B...     

油田站场VOCs排放量核算及减排措施建议

GB39728—2020《陆上石油天然气开采工业大气污染物排放标准》对油田站场挥发性有机物(VOCs)提出了管控要求,但国家目前尚未颁布油田VOCs排放量核算方法,VOCs排放基数有待探明。选取新疆某油田联合站场作为研究对象,明确联合站的VOCs排放源,基于公式法(TANKS模型)核算联合站有机液体储存源项的VOCs排放量,并分析储存物料的雷德蒸气压和储罐罐型对VOCs排放量的影响,发现雷德蒸气压越大、周转量越大,VOCs的排放量越大。在相同储存条件下,浮顶罐储存较固定顶罐的VOCs无组织排放量更小。基于物料衡算法和系数法,对废水集输和处理系统的VOCs排放量进行核算。基于研究结果和国家对陆上石油天然气行业VOCs排放的管控要求,提出VOCs减排建议。     

液化石油气BLEVE事故研究

为了减小液化石油气沸腾液体扩展蒸汽云爆炸事故后果,采用ALOHA软件对液化石油气储罐泄漏事故进行研究,基于液化石油气泄漏量、空气湿度、风速、储存温度等爆炸事故后果影响因素进行数值模拟。研究结果表明:液化石油气泄漏量越大,沸腾液体扩展蒸汽云爆炸事故产生的火球直径越大,燃烧时间或热辐射时间越长,且造成的危害范围越大,事故后果越严重;随着空气湿度增加,事故影响的范围逐渐减小,事故后果相对减小;随着液化石油气储存温度增加,事故影响范围逐渐减小;风速对于事故影响范围无影响;空气湿度、储存温度及风速对火球直径及火球燃烧时间无影响。     

工业有机废气污染治理技术及其进展探讨

阐述了近年来国内外在工业有机废气治理中常用技术和正在发展的新技术和最新研究，指出了当前有机废气治理技术存在的问题和发展方向．     

支撑离子液体膜微萃取-气相色谱法测定水中有机氯农药

摘要：将l-丁基-3-甲基咪唑六氟磷酸离子液体固定于无纺布上形成支撑离子液体膜,结合液相微翠取技术对水样中的有机氯农药进行分离与富集,并用气相色谱法测定。通过试验对影响萃取效率的有关条件进行优化,使该方法在0．500μg／L～10．0μg／L范围内线性良好。方法检出限为0．02μg／L～0．08μg／L,测定0．04μg／L的混合标准溶液平均回收率为75．0％～87．3％,RSD〈7％。     

Determination of atmospheric hydroxyl radical by HPLC coupled with electrochemical detection

The hydroxyl radical (·OH) plays a central role in the oxidation and removal of many atmospheric compounds. Measurement of atmospheric·OH is very difficult because of its high reactivity and low atmospheric abundance. In this article, a simple and highly sensitive method, high performance liquid chromatography coupled with coulometric detection (HPLC-CD), was developed to determine·OH indirectly by determining its reaction products with salicylic acid (SAL), 2,3-dihydroxybenzoic acid (2,3-DHBA), and 2,5-dihydroxybenzoic acid (2,5-DHBA). Under the optimum conditions for its determination, 2,3-DHBA and 2,5-DHBA could be well separated and the detection limits for 2,3-DHBA were 3×10~(-10) mol/L and for 2,5-DHBA were 1.5×10~(-10) mol/L, which were lower than most previous reports. This method was also applied to measure atmospheric hydroxyl radical levels and demonstrated the feasibility in clean and polluted air.