ISSN:0278-4491    

DOI:10.1002/ep.670100202

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670100204

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670100205

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670100206

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670100207

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670100208

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

摘要:

AbstractMeasurements of metal partitioning between the fine condensation aerosol and the larger particles produced during rapid heating of aqueous and organic solutions containing metal additives with widely varying volatilities were made in a laboratory‐scale furnace operated over a range of temperatures (900 to 1500 K). A stream of monodisperse droplets (nominal diameter of 36 μm) was injected into an isothermal, laminar drop‐tube reactor, quickly developing into a stream of droplets with heterogeneous size distribution due to droplet collision and coalescence. Aqueous solutions containing nitrates of cadmium, lead and nickel gave rise to particles with trimodal size distributions. Partitoning of the larger particles between a residual mode (particle aerodynamic diameter, Dp,aero>7 μm) and an intermediate mode (1 μm>Dp,aero>7 μm) is suggestive of particle porosity variation. In addition, ultrafine particles, with submicron aerodynamic diameter, were formed, both by the anticipated vaporization pathway and by an unexpected explosive fragmentation mechanism. The higher volatility of the chloride than the oxide was evidenced by an enhanced inorganic aerosol formation during the high temperature treatment of a nickel chloride solution. The oxidative burning of organometallic solutions of nickel and lead produced only particles of submicron aerodynam

ISSN:0278-4491    

DOI:10.1002/ep.670100209

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

摘要:

AbstractRapid development of technologies and production systems is often accompanied by the increased generation of hazardous or toxic wastes. Among these wastes, waste solutions containing cyanide cause a particularly serious problem, threatening both public health and environment. It appears that the best way to minimize the cyanide‐containing wastes is to reduce their production in electroplating plants. Numerous techniques have been developed for this purpose, and much experience has been gained by applying such techniques. An expert system, MIN‐CYANIDE, has been constructed to assist engineers and technicians in the source reduction of cyanide‐waste solutions in an electroplating plant by resorting to these techniques and experience, and to train plant operators in the application of the techniques. MIN‐CYANIDE evaluates options, such as dragout minimization, bath‐life extension, rinse‐water reduction, replacement with a non‐cyanide solution, use of an alternative plating technique, and improvement of the operating procedure; furthermore, it identifies the most effective among them. The knowledge about the cyanide source reduction is acquired from available publications, represented by numerous fuzzy or non‐fuzzy heuristic rules, and codified into a commercial export system shell, Personal Consultant Plus, on an IBM PC/AT compatible computer. MIN‐CYANIDE provides a userfriendly interface; in operating it, the user answers various questions concerning the operational situations of the production and/or current equipment and techniques in the plant. In response, MIN‐CYANIDE will present instantaneously a series of options for cyanide minimization and e

ISSN:0278-4491    

DOI:10.1002/ep.670100210

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

摘要:

AbstractThis paper presents the results of a field study conducted to examine the accuracy achieved when modeling the removal of organic compounds by biological wastewater treatment processes. Special emphasis is placed on determining the specific removal pathway, accuracy for three compounds, believed to the removed primarily by only one pathway. Off‐gas chloroform measurements made through use of a surface isolation flux chamber were modeled to within two percent, as were measurements reflecting the biodegradative removal of methanol. Varying degrees of accuracy were obtained for the chlorophenolic compounds examine

ISSN:0278-4491    

DOI:10.1002/ep.670100211

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY

摘要:

AbstractKnowledge of contaminant soil‐groundwater partitioning is of crucial importance in determining contaminant transport. The majority of studis to date examine only single contaminant partitioning. Studies presented in this paper investigated single contaminant and multiple, competitive contaminant partitioning of benzene, toluene, and xylenes with a sandy loam soil. Batch serum bottle and flow soil column studies were utilized. Significant competitive effects were observe

ISSN:0278-4491    

DOI:10.1002/ep.670100212

出版商:American Institute of Chemical Engineers    

年代:1991

数据来源: WILEY