摘要:

An experimental set‐up was used to evaluate Henry's constant (H) of H2S in distilled water and one of the sewage treatment plants in Kuwait. Calculated values of (H) for H2S in distilled water were found to agree with published works. For sewage, (H) was found to have a mean value of 601 atm/mole fraction for a temperature range of 20°C to 40°C. Factors affected the value of (H) in sewage were: initial concentration, flow rate of stripping fluid, pH, and pK. Effect of each factor was investigated and results were correlated.

ISSN:0360-1226    

DOI:10.1080/10934528909375476

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Penetration of Chlorophenols through Human Skin Penta and tetrachlorophenol are widely used wood preservatives which have received increasing regulatory attention form EPA and OSHA. While primary concerns have focused on dioxin contaminant levels there has been considerable controversy over the risks associated with perdermal penetration: both in the workplace and the environment. Based on very limited acute dose rate experiments, the EPA has estimated dermal penetration of 50% for pentachlorophenol inorganic solutions (typically diesel oil) and 1% for aqueous sodium pentachlorophenate solutions. No estimates are available for tetrachlorophenol.

ISSN:0360-1226    

DOI:10.1080/10934528909375477

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Major, minor and trace quantities of ten stable elements have been determined from the aquatic sediments of the Kubanni River Dam (KRD), at Zaria, Nigeria.

ISSN:0360-1226    

DOI:10.1080/10934528909375478

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A total of 150 male and female common carpsCyprinus carpiowere taken from Al‐Habbaniyah fish cages. Sampling was done monthly during the period from June 1986 until May 1987. Samples were dried and analysed chemically for the determination of protein and lipid contents of muscle (carcase), liver, and gonads of each fish.

ISSN:0360-1226    

DOI:10.1080/10934528909375479

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

One method for performing exposure assessments is to use mathematical models that predict the transport and transformations of toxic substances in the environment. To run these models, a variety of input data on receiving water‐body properties and water‐quality parameters must be developed.

ISSN:0360-1226    

DOI:10.1080/10934528909375480

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A passive sampling technique for the determination of time‐weighted‐average concentrations of phenolic priority pollutants in water is described. Phenols permeate a silicone polycarbonate membrane and are collected on a polymeric adsorbent. For high concentration ranges, phenols are adsorbed on the XAD‐7 resin and then desorbed with acetonitrile. Low ppb concentrations of phenols are analyzed by collection on Tenax‐TA followed by thermal desorption. Separation and quantification is achieved by capillary column gas chromatography using a flame ionization detector. A linear relationship between the amount of phenols collected and the products of the exposure time and phenolic concentrations over the range of 5 ppb ‐ 20 ppm have been determined. Temperature and solution pH affect permeation rates of the phenols. The sampling method is simple, inexpensive and suitable for multilocation monitoring.

ISSN:0360-1226    

DOI:10.1080/10934528909375481

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

This paper reports the behaviour of an anaerobic digester fed with pure, easily biodegradable substances (glucose and sucrose); for this a kinetic model was used based on the kinetic equation of growth in microorganisms defined by Contois.

ISSN:0360-1226    

DOI:10.1080/10934528909375482

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934528909375475

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor