Adsorption of phenthoate and acetochlor from water by clays and organoclays

IntroductionImmobilizationorseparationofcontaminantscontainedinpollutedwaterisanobjectiveofincreasingimportanceinavarietyofenvironmentalsettings.Theextentofpesticidecontaminationofthewaterenvironmenthasrecentlyraisedmuchconcernbecauseofthepotentialhealthh…     

焦化废水的多污染物评价

参照美国EPA的水中优先检测污染物以及我国优先检测污染物的名单，重点检测了有机污染物在焦化废水的分布；采用多污染物分析与评价对焦化废水分别从人体健康影响度(AS1)和生态环境影响度(AS2)两项指标进行了评价。     

废弃物基活性炭对VOCs废气的治理

研究了废弃物基活性炭在对VOCs吸附过程中的主要影响因素。结果表明废弃物基活性炭完全可用于VOCs的净化治理工艺。     

陕西省天然源挥发性有机物排放清单及时空分布特征研究

基于Guenther提出的天然源性有机化合物(BVOCs)公式计算模型,利用高精度土地利用遥感资料,模拟估算了2000—2020年陕西省107个区县BVOCs的排放量、排放组成及时空分布规律.测算结果显示,陕西省近20年来BVOCs排放量呈上升趋势,总排放量从101.17×10⁴ t·a^-1上升至111.43×10⁴ t·a^-1.近20年陕西省年平均BVOCs排放量为106.01×10⁴ t·a^-1,其中,异戊二烯排放量为31.65×10⁴ t·a^-1,占比为29.86%;单萜烯排放量为35.61×10⁴ t·a^-1,占比为33.60%;其他VOCs排放量为38.75×10⁴ t·a^-1,占比为36.54%.BVOCs排放总量存在季节性变化,呈夏季高、冬季低的规律,夏、冬两季排放量分别为69.0×10⁴、...     

泄漏检测与修复技术实施水平量化评估简介

介绍了泄漏检测与修复(LDAR)及挥发性有机化合物(VOCs)控制相关标准、指南和文件。研究了泄漏检测与修复项目实施水平量化评估技术。其中,评估流程包括制定评估方案、收集评估资料,开展现场评估,编写评估报告;评估要素包括资料审核、现场审核、人员考察、现场抽检4方面内容;水平量化评估包括LDAR技术实施水平量化评估检查表、LDAR技术实施水平量化评分标准。本研究对评估企业实施LDAR过程合规性,检测数据有效性,以及实施技术水平的可比性具有指导意义。     

石化生产装置挥发性有机化合物的泄漏检测

阐述了石化生产装置挥发性有机化合物泄漏检测工作的主要环节,介绍了主要的泄漏检测对象和检测部位,以及对检测人员的要求,给出了从检测仪器的检定和核查、响应因子、检测方法、背景干扰、数据记录等方面确保检测质量的方法.     

挥发性有机化合物的污染控制

介绍各种常见的挥发性有机化合物（VOCs）的控制技术，包括回收技术和销毁技术。综述各种控制技术的基本原理和特点、应用条件及存在的问题，提出VOCs控制技术的发展方向。     

Electrochemical reduction characteristics and mechanism of nitrobenzene compounds in the catalyzed Fe-Cu process

The reduction of the nitrobenzene compounds （NBCs） by the catalyzed Fe-Cu process and the relationship between the electrochemical reduction characteristics of NBCs at copper electrode and reduction rate were studied in alkaline medium（pH=11）. The catalyzed Fe-Cu process was found more effective on degradation of NBCs compared to Master Builder＇s iron. The reduction rate by the catalyzed Fe-Cu process decreased in the following order： nitrobenzene 〉4-chloro-nitrobenzene ≥m-dinitrobenzene ：〉 4-nitrophenol ≥2,4-dinitrotoluene 〉2-nitrophenol. The reduction rate by Master Builder＇s iron decreased in the following order： m-dinitrobenzene ≥4-chloro-nitrobenzene 〉4-nitrophenol 〉2,4-dinitrotoluene ≈nitrobenzene 〉2-nitrophenol. NBCs were reduced directly on the surface of copper rather than by the hydrogen produced at cathode in the catalyzed Fe-Cu process. The reduction was realized by the hydrogen produced at cathode and Fe（OH）2 in Master Builder＇s iron, It is an essential difference in reaction mechanisms between these two technologies. For this reason, the reduction by the catalyzed Fe-Cu depended greatly on NBC＇s electron withdrawing ability.     

Enhanced photocatalytic activity of TiO2 by surface fluorination in degradation of organic cationic compound

Experiments were carried out to investigate the influence of TiO2 surface fluorination on the photodegradation of a representative organic cationic compound, Methylene Blue （MB）. The eleetropositive MB shows poor adsorption on TiO2 surface; its degradation performs a HO. radical-mediated mechanism. In the F-modified system, the kinetic reaction rate enlarged more than 2.5 fold that was attributed mainly to the accumulating adsorption of MB and the increased photogenerated hole available on the F-modified TiO2 surface.     

减少涂料造成的大气污染

挥发性有机化合物(VOC)是致癌物,而且是引起全球变暖的温室效应的众多气体之一。目前,从装修用涂料和工业涂料中排放出来的VOC的总量每年达200万t,而控制这些排放的规定越来越严格,促使人们开始研究以水和固体为基础的涂层取代以VOC为基础的涂层,这些替代物能减少或消除有害排放物。英国的工业聚合物(ICL)公司在这一方面居世界领先地位。汽车车身、军事和航空硬件中使用了大量的Polyurethane涂料,特点是