Showing papers in "Environment International in 1992"

TL;DR: The combined XAD-8 andXAD-4 resin procedure for the isolation of dissolved organic solutes from water was found to isolate 85% or more of the organicsolutes from Lake Skjervatjern in Norway, suggesting that both sides of the lake are similar in organic chemical composition even though the DOC variation from side to side is 20%.

TL;DR: Monitoring of an underground effluent deposit and the exploration thereof are performed by installing various devices or user modules by connecting them to a surface station by means of a particularly simple and reliable multi-channel transmission unit.

TL;DR: In this article, the change in the perception of polluted air was studied during the first 15 min of exposure in climate chambers, where subjects were exposed to different concentrations of human bioeffluents (500 −4000 μL/L CO 2 ), tobacco smoke (0.25 −2.5 μL /L CO), and emissions from building materials (−).

TL;DR: In this article, the volume of outside air introduced into the ventilation system is determined through use of the test gas concentration measurements without directly measuring the volume or flow rate of the outside air.

TL;DR: In this paper, solid waste such as sewage sludge containing fecal matter is processed to reduce pathogens by at least 90% and converted to a useful product such as an amendment to agricultural land by combining the waste with an acid such as concentrated sulfuric and a base such as fly ash which exothermically react and thermally pasteurize the waste and add mineral value to the product.

TL;DR: In this paper, a monochromatic beam of pulsed ultraviolet laser radiation of wavelength about 240-280 nm, with pulse duration in the range of picoseconds to microseconds at 1-1900 mJ/cm 2 for most situations.

TL;DR: In this article, a closed combustion system is used to incinerate hazardous wastes and vitrify ash, where flue gases, liquids, solids and ash are channeled through the system and recirculated back to the incinerator for incineration.

TL;DR: In this paper, the results indicate that lead levels in roads designated as busy are significantly greater than residential roads, and the highest lead levels were found in the vicinity of a car repair workshop.

TL;DR: In this paper, a dystrophic lake was divided in two halves by a plastic curtain from the middle of the natural outlet to the opposite side, and during two years, through September 1990, the water chemistry of the two lake halves was monitored.

TL;DR: In this paper, the authors present baseline information of children's activity patterns: the sample distribution of time spent in each of five microenvironments (travel, outdoor, at school, at home, and inside other locations) and the daily temporal pattern of activities.

TL;DR: In this article, a process and device for combined oxidation of polluted water, to make it suitable for drinking, involves injection of hydrogen peroxide (pure aqueous solution or diluted) and ozone (gaseous, or ozonized oxygen or air) simultaneously and in a flow direction co-current with the circulation of the water to be treated, at the inlet of the oxidation reactor.

TL;DR: In this article, a total of 585 offices was sampled for a number of factors, including respirable suspended particles (RSP), nicotine, carbon monoxide, carbon dioxide, room size, average number of room occupants, and number of cigarettes consumed.

TL;DR: Amending oil-contaminated soils with poultry manure, should possibly improve soil fertility and maize production.

TL;DR: In this paper, a mesh fabric intercepts the downward flow of the effluent in the filter to further aid in the even distribution of effluent, and a flush system is provided to easily remove any clogging solid material from the distribution manifold.

TL;DR: In this article, a waste material (A) such as waste tires is incinerated by way of dry distillation and gasification, and the amount of oxygen supplied to the gasification furnace (1) is controlled to maintain, at a substantially constant value, the temperature of the combustible gas.

TL;DR: In this article, a process of using fast pyrolysis in a carrier gas to convert a plastic waste feedstream having a mixed polymeric composition in a manner such that pyrolysisation of a given polymer to its high value monomeric constituent occurs prior to pyropolysis of other plastic components is described.

TL;DR: In this article, seasonal and diurnal variations in the ambient air concentrations of ozone in Varanasi city, India for the years 1989 and 1990 were reported, where different monitoring zones were established in the city on the basis of pollution sources, traffic densities, and structure of built-up areas.

TL;DR: In this paper, a process and system for continuously recovering industrial waste water characterized as divergent hydro-lipophilic waste streams for industrial reuses to enhance water conservation and to reduce environmental pollution is disclosed.

TL;DR: In this paper, a float operated make-up valve is used to control the amount and concentration of makeup water and chemicals introduced into the recirculating water of a cooling tower system.

TL;DR: In this article, a row of adjoining infrared detector element pairs (S, S') is disposed on a common support (7) in the focal plane of a reflector, and detector elements are arranged in pairs, side-by-side on the same support.

TL;DR: In this article, a continuous flow microwave heated digesting system, which is especially useful for digesting samples of materials to be analyzed with an atomic absorption spectrometer (ASS), includes a chamber, a source of microwave radiation into the chamber, thin bore chemical resistant an microwave transmissive tubing within the chamber onto which the microwave radiation impinges to heat contents of the tubing, and a pump or other suitable apparatus or device for passing through the tubing.

TL;DR: In this paper, the fullness of a plurality of trash collection units equipped with industrial compactors can be monitored at or by a central processing unit by measuring the strain exerted against a component of the compaction assembly as a result of the compacting action.

TL;DR: The Iowa Statewide Rural Well Water Survey (SWRL) was conducted between April 1988 and June 1989 as discussed by the authors, which was designed to provide a statistically valid assessment of the proportion of private rural wells and rural Iowa residents affected by various environmental contaminants.

TL;DR: In this paper, the T CP and T 1ϵ time constants for Skjervatjern fulvic and humic acids were determined to be short with T CP values ranging from 0.14 ms to 0.53 ms and t 1 ϵ time constant ranging from 3.3 ms to 5.9 ms.

TL;DR: In this paper, the authors measured airborne velocities and deposition fluxes of NO3−1 and SO4−2 on various surrogate surfaces, specifically petridishes of polypropylene and glass, marble slabs, ceramic tiles, and stainless steel plates, between January and June, 1991.

TL;DR: The chemical association pattern of lead in road dusts taken at locations near two schools in South East London and from soils located within the schools' grounds was investigated using a selective extractant speciation scheme as discussed by the authors.

TL;DR: In this article, a method is described to disinfest, decontaminate and extend the shelf life of shellfish by using an open-end system where trawled shellfish are placed on a computer controlled conveyor belt after being washed with seawater.

TL;DR: In this article, anthropogenic input of Fe, Mn, Cu, Zn, Pb, Cr, Cd, and organic carbon into the Dar es Salaam coastal sediments is assessed in relation with human activities in the watershed and within the respective water body.

TL;DR: In this paper, different packaging materials are compared by means of LCA and eco-balancing to demonstrate the principle of "eco balancing" or comparing different products which fulfil the same function.