5—(4—磺酸基苯偶氮)8—(2,4—二硝基苯氨基)喹啉测定食品中铜的研究应用

在弱碱性介质中 ,5— (4—磺酸基苯偶氮 ) 8— (2 ,4—二硝基苯氨基 )喹啉 (SPDNPAQ)与铜反应生成 2∶ 1紫红色络合物 ,体系 λmax=56 0 nm,ε=1.2 3× 10 5L· mol-1· cm-1。铜含量在 0～ 0 .4 mg/ L内符合比耳定律 ,方法用于一些生物样品和水样中铜的测定。     

喹啉的微波辅助光催化氧化降解研究

对微波辅助紫外光催化(MV/UV/P25)处理喹啉模拟废水的工艺条件进行了实验研究,并比较了MW、UV、UV/曝气、MW/UV/曝气、MW/UV/P25等五种体系下喹啉的降解,结果表明,微波辐射与紫外光催化(MV/UV/P25)在喹啉的降解过程中具有很好的协同作用,在反应进行到lh时,喹啉的去除率达到了64.9%。实验还对MW/UV/P25体系中喹啉降解的影响因素进行了研究。     

同分异构体喹啉和异喹啉的缺氧降解性能比较

研究了同分异构体的含氮杂环化合物喹啉和异喹啉在缺氧条件下的降解情况,发现两者表现出不同的缺氧降解特性。喹啉可以在缺氧条件下得到有效降解,其缺氧降解的最佳碳氮比为8。在最佳碳氮比条件下,喹啉的缺氧降解过程符合一级动力学规律,在其降解过程中首先以硝酸盐为电子受体,当硝酸盐氮浓度为零时,亚硝酸盐氮浓度达到最高,此后喹啉的降解主要以亚硝酸盐为电子受体,并和亚硝酸盐氮同时达到最低浓度。异喹啉对硝酸盐的利用甚微,其降解主要表现为厌氧降解特征,降解过程符合零级动力学规律。     

Enhanced electrokinetic remediation of quinoline-contaminated soils

ABSTRACT

The aim of this investigation was to examine the ability of enhanced electrokinetic (EK) remediation to efficiently remove quinoline from contaminated kaolinite soils. In order to accomplish this, the effect of a voltage gradient and anode buffer concentration on migration of quinoline in kaolinite was determined. The results showed that EK transport process effectively stimulated desorption and movement of quinoline in kaolinite. The rate and distance of migration rose with increasing voltage gradient and anode buffer concentration under certain conditions. The mechanisms that drive quinoline migration by electrodynamic processes were established as attributed to either electromigration or electroosmosis, and both played key roles in driving quinoline to migrate towards the cathode.     

共基质下白腐菌降解含氮杂环类物质的研究

选用不同的营养基质（秸秆、土豆、合成）,通过液体发酵确定白腐菌对典型含氮类杂环化合物喹啉,吲哚分别进行降解。结果表明：秸秆滤液培养基中,喹啉15d内能被降解88．79％,吲哚在6d内降解率能达到99％。采用此培养基,进一步研究喹啉、吲哚及其它物质共基质条件下,白腐菌对喹啉和吲哚的降解性能,发现在共基质条件下喹啉的降解被抑制,而吲哚则能在共基质条件下3d被完全降解,说明共基质促进了白腐菌对吲哚的降解。     

喹啉及其衍生物微生物降解研究进展

喹啉类氮杂环化合物在水、土壤环境中普遍存在，受其污染的水、土壤环境生物修复是目前环境治理领域的重要课题。介绍了近年来喹啉类氮杂环化合物微生物降解的国内外研究进展，主要包括可利用喹啉类氮杂环化合物作为碳源、氮源和能源的微生物资源、微生物降解的有氧代谢和无氧代谢两大途径，以及喹啉类化合物的降解动力学。在此基础上，提出了需要进一步研究的方向。     

Coupled aerobic and anoxic biodegradation for quinoline and nitrogen removals

Quinoline (C₉H₇N) commonly occurs in wastewaters from the chemical, pharmaceutical, and dyeing industries. As quinoline is biodegraded, nitrogen is released as ammonium. Total-N removal requires that the ammonium-N be nitrified and then denitrified. The objective of this study was to couple quinoline biodegradation with total-N removal. In a proof-of-concept step, activated sludge was sequenced from aerobic to anoxic stages. The ammonium nitrogen released from quinoline biodegradation in the aerobic stage was nitrified to nitrate in parallel. Anoxic biodegradation of the aerobic effluent then brought about nitrogen and COD removals through denitrification. Then, simultaneous quinoline biodegradation and total-N removal were demonstrated in a novel airlift internal loop biofilm reactor (AILBR) having aerobic and anoxic zones. Experimental results showed that the AILBR could achieve complete removal of quinoline, 91% COD removal, and 85% total-N removal when glucose added as a supplemental electron donor once nitrate was formed.     

白腐菌对焦化废水中喹啉的降解及机理研究

选用白腐菌BP降解喹啉,研究了白腐菌在不同培养基中对喹啉的降解过程和机理,以及喹啉的降解与白腐菌漆酶活力、生物量比增长速率、培养基pH值的关系。结果显示秸秆滤出液培养基中生长的白腐菌对喹啉具有最高的去除率89%;喹啉的相对去除率与白腐菌漆酶活力、生物量比增长速率具有较好的相关性;白腐菌BP最适pH为6~7;2-羟基喹啉是喹啉降解过程中首先出现的中间产物。