由维尼纶厂废液合成乙酸乙酯

本文以维尼纶厂废液中提取的乙醛为原料，通过缩合反应合成乙酸乙酯，乙醛转化率达９１．５％，选择性达９３．０％，并对乙醛的提取、催化剂合成及缩合反应进行了探讨。     

由维尼纶厂废液合成乙酸乙酯

本文以维尼纶厂废液中提取的乙醛为原料,通过缩合反应合成乙酸乙酯,乙醛转化率达91.5%,选择性达93.0%,并对乙醛的提取、催化剂合成及缩合反应进行了探讨.     

小型环境实验舱用于评价空气净化材料净化效果

建立了用于评价被动式空气净化产品的小型环境模拟舱系统.系统以滤纸为净化材料载体,乙醛及丙酮为污染物,经过验证,空白实验及环境舱平行性良好,具有评价各类被动式空气净化产品的潜在应用价值.本实验应用此环境舱评价了2种二氧化钛光催化剂、2种超支化聚酰胺PAMAM-NH2及1种市售复合型空气净化剂的净化效果.结果表明,在经过24 h净化后,二氧化钛光触媒在自然光条件下对乙醛及丙酮的净化效率为12.2％ ～ 34.5％;超支化聚酰胺对乙醛的净化效率为35.2％ ～48.1％,对丙酮无净化作用;复合型空气净化剂对乙醛及丙酮的净化效率为15.7％ ～32.2％.     

介质阻挡等离子放电臭氧氧化乙醛废水

对介质阻挡等离子体放电产生臭氧以及臭氧氧化乙醛模拟废水(乙醛水)的过程特性进行了研究。纯氧的介质阻挡等离子放电产生含有一定臭氧浓度的氧气流,含臭氧的氧气流通入模拟乙醛废水中对乙醛进行臭氧氧化。研究发现,乙醛可以被臭氧深度氧化成CO和CO2,CO2的选择性为66%~80%。乙醛去除反应是臭氧浓度的一级反应和乙醛浓度的一级反应。臭氧氧化乙醛的能量效率随能量密度的增加而降低。研究还表明,如能循环使用未能和废水中的乙醛发生反应的臭氧有望降低臭氧处理废水的成本。     

Pd/MCM-41对乙醇汽油车尾气排放乙醛的吸附和催化氧化性能

以正硅酸乙酯(TEOS)为硅源,十六烷基三甲基溴化铵(CTAB)为模板剂,采用水热合成法制备了MCM-41分子筛,以其为载体采用等体积浸渍法制得Pd/MCM-41催化剂,并用于乙醇汽油车冷启动排放乙醛的净化。采用氮气吸附脱附法(BET)、X射线衍射仪(XRD)、透射电子显微镜(TEM)对Pd/MCM-41理化性能进行表征,并用原位傅里叶变换红外技术研究了Pd/MCM-41在空气氛围下对乙醛的净化机理。结果表明:Pd/MCM-41具有规整的六方孔道、孔径分布均匀、比表面积大的特点;常温下,Pd/MCM-41催化剂可快速吸附乙醛,吸附容量可达105 mg·g~(-1),而吸附在Pd/MCM-41上的乙醛在180~220℃之间即可发生氧化而生成CO2和乙酸。     

糖用活性炭生产中工艺废气的治理和回收磷酸

介绍了转炉磷酸法生产糖炭过程中工艺废气的治理方法，采用三级吸收治理废气，回收了其中有用的磷酸废气，获得了较好的环境效益和社会效益。     

有机废气吸附净化处理的新型工艺研究

简要介绍了挥发性有机废气的来源、分类及其对人体和环境的危害，以及盐城市部分企业近年来的产生和排放状况。较详细地论述了吸附净化处理技术用于废气中挥发性有机化合物的去除和回收研究工艺与特点，阐明了目前有机废气的净化处理方向。     

生物法净化再生胶生产废气工业试验研究

在再生橡胶厂进行橡胶再生低浓度有机废气的生物法净化工业试验研究，对于甲苯浓度为300～1400mg/m^3的再生胶脱硫废气，在常温常压下以气体流量10～20m^3/h、循环液体喷淋量300～500L/h运行生物法废气净化装置获得了良好物净化效果。该装置连续运行100d的结果显示，其对再生胶废气中甲苯的净化效率可较长时间的保持在90%左右，废气经处理后可以实现达标排放，废气处理成本约为工厂再生胶产值的0.12%～0.14%，具有明显的技术先进性和经济合理性。     

防火及阻燃材料质量检验过程中含挥发性有机物烟气的治理工艺

防火及阻燃材料的质量检验是检验产品防火性能、有效预防火灾的保障,在其检验过程中会产生大量含挥发性有机物(VOCs)的烟气,该类废气通常未经处理或经简单处理直接排放,严重污染了周围环境。为研究该类废气的排放状况,分析了该类废气的成份及特点。通过对比分析VOCs废气处理的常用治理工艺,结合实际工程应用经验,针对性的提出了该类废气的综合治理工艺,为该类废气的治理提供了参考。     

活性炭吸附-精馏提纯有机废气回收技术在循环经济中的应用

阐述了治理有机废气的重要性，重点介绍了活性炭吸附-精馏提纯有机废气的回收技术，通过案例分析和对比，显示了该技术的优越性，提出在工业行业中，推广应用活性炭吸附-精馏提纯的回收技术，是符合循环经济理念的，不仅能够减少资源消耗，而且可以降低废气的污染物排放，实现有机废气的资源化利用。     

U.S. EPA SITE demonstration of AWD Technologies' AquaDetox/SVE system.

Under the Superfund Innovative Technology Evaluation (SITE) Program, a technology developed by AWD Technologies, Inc. was demonstrated in September 1990. This paper presents the major results of the SITE demonstration of AWD Technologies' AquaDetox/SVE treatment system designed for simultaneous on-site treatment of contaminated groundwater and soil-gas. The groundwater and soil at the demonstration site were contaminated with trichloroethylene (TCE) and tetrachloroethylene (PCE). The AWD technology was evaluated on the basis of the removal efficiencies of TCE and PCE from the contaminated groundwater and soil-gas. The conclusions drawn from these evaluations are: (1) the system achieved removal efficiencies as high as 99.99 percent for groundwater and 99.9 percent for soil-gas; (2) the effluent groundwater was in compliance with the regulatory discharge requirements of 5 micrograms/L each for TCE and PCE for all test runs; (3) the demonstrated 1,000 gpm system has an estimated capital cost of $4.3 million and annual operating and maintenance cost of approximately $820,000.     

Deactivation of mycotoxins. I. An in vitro study of zearalenone adsorption on new polymeric adsorbents.

This study describes the elimination of zearalenone concentrations in vitro using two new polymeric forms of cross-linked polyvinylpyrrolidone (cryogels of cross-linked PVP). Adsorption of zearalenone was studied under isothermal conditions and simulating pH of intestinal environment. A Freundlich isotherm was used to describe the adsorption data obtained. The results showed significant decrease of zearalenone concentrations, ranging from 33.5-66.2% per 25 mg of polymer. Adsorption capacity (k) was estimated to be higher than that of previously tested adsorbents, including crospovidone. The data indicate the need to investigate structure peculiarities in order to improve mycotoxin deactivation procedures using PVP derivatives.     

Standardization and application of an E.L.S.-bioassay for PCDDs and PCDFs

An early life stage bioassay (E.L.S.-bioassay) for the determination of polychlorinated dibenzo-p-dioxins and dibenzofurans in complex matrices has been developed. The bioassay is based upon mortality, resulting from a typical toxicopathological syndrome in rainbow trout eleutheroembryos. Its reliability is demonstrated by the application to incinerator fly ash. It is concluded, that the E.L.S.-bioassay is a simple, useful and relatively inexpensive method to determine the amount of PCDDs and PCDFs in potentially contaminated environmental samples.