Science education is criticized because it often fails to support problem-solving skills in students. Instead, the instructional methods primarily emphasize didactic models that fail to engage students and reveal how the material can be applied to solve real problems. To overcome these limitations, this study asked participants in a general…

An experiment is conducted to promote biotechnology knowledge that is an emerging technology on cleaning treatment, showing the potential of seaweed to remove heavy-metal ions from solution. The rapid and accurate determination of zinc in aqueous solution by the zincon colorimetric method gives an interesting and simple experiment for any…

Describes the methodology and results of a study comparing the overlap of Enviroline, Pollution, and the Environmental Periodicals Bibliography files through searches on acid rain, asbestos and water, diesel, glass recycling, Lake Erie, Concorde, reverse osmosis wastewater treatment cost, and Calspan. Nine tables are provided. (RBF)

This document reports the efforts of the AWWA Research Foundation to gather, prepare, and distribute current technical information in the wastewater reclamation and reuse field. The information reported has been abstracted from other Foundation publications and only attempts here to highlight the field. Categories discussed include research,…

A description is given of work undertaken to develop a simple, specific, and reliable method for ozone. Reactions of ozone with several 1-alkenes were studied at room temperature (25C). Eugenol (4-allyl-2-methoxy phenol), when reacted with ozone, was found to produce relatively large amounts of formaldehyde as compared to other 1-alkenes tested.…

The Global Environmental Monitoring System (GEMS) is one of four components of Earthwatch, a part of the United Nations Environment Program (UNEP). The purpose of GEMS is to provide early warning of impending natural or man-induced environmental changes or trends that threaten direct or indirect harm to human health or well-being. In 1975, the…

In this study, a freshwater flatworm was shown to be tolerant to a wide pH range and could survive in acidified water to approximately pH 3.6. The influence of other abiotic factors is explored. (CW)

Twelve papers were translated from Russian: Automation of Information Processing Involved in Experimental Studies of Atmospheric Diffusion, Micrometeorological Characteristics of Atmospheric Pollution Conditions, Study of theInfluence of Irregularities of the Earth's Surface on the Air Flow Characteristics in a Wind Tunnel, Use of Parameters of…

Total mercury in ambient air can be collected in iodine monochloride, but the subsequent analysis is relatively complex and tedious, and contamination from reagents and containers is a problem. A sliver wool collector, preceded by a catalytic pyrolysis furnace, gives good recovery of mercury and simplifies the analytical step. An instrumental…

The report represents the efforts of two schools of higher education in northern Wisconsin to keep Lake Superior, the largest surface area, fresh water lake in the world, close to the condition it was in thousands of years ago when it was formed. The University of Wisconsin-Superior and Northland College have been studying, since 1972, water…

The report represents the efforts of two schools of higher education in northern Wisconsin to keep Lake Superior, the largest surface area, fresh water lake in the world, close to the condition it was in thousands of years ago when it was formed. The University of Wisconsin-Superior and Northland College have been studying, since 1972, water…

A significant fraction of household hazardous waste (HHW) is generated by home mechanics who use such products as motor oil, cleaners and solvents, and batteries. This survey assessed the following aspects: (1) perceptions of their health-related effects; (2) perceptions of their pollution potential; and (3) their use and disposal. (LZ)

The current manual NO (x) sampling and analysis method was evaluated. Improved time-integrated sampling and rapid analysis methods were developed. In the new method, the sample gas is drawn through a heated bed of uniquely active, crystalline, Pb02 where NO (x) is quantitatively absorbed. Nitrate ion is later extracted with water and the…

A screening study was conducted to evaluate the capability of aqueous solutions to scrub NOx from the flue gases emitted by stationary power plants fired with fossil fuels. The report summarizes the findings of this laboratory program. The experimental program studied the following media for absorption of NOx from flue gases containing no NOx:…

A prototype model low level carbon monoxide analyzer was developed using fluorescent cell and negative chopping techniques to achieve a device superior to state of art NDIR (Nondispersive infrared) analyzers in stability and cross-sensitivity to other gaseous species. It is clear that this type of analyzer has that capacity. The prototype…