Evaluation of fe oxide-coated granular activated carbon for removal and recovery of Cu(II) and Cr(VI) from aqueous solution /

"April 1994."--Cover.

Illinois in the '80's--trends in natural resource management : proceedings of the ninth annual INR Conference, Chicago, Illinois, August 25-26, 1980 /

"August 25-26, 1980."

Video image analysis of aggregates : a study report on evaluation of coarse aggregate shape and size properties using video imaging /

"Report no. FHWA-IL-UI-278"--Technical report documentation page.

The Corps, the environment, and the Upper Mississippi River Basin /

Mode of access: Internet.

Western energy : the interregional coal analysis model /

Prepared in cooperation with U.S. Environmental Protection Agency, Office of Environmental Engineering and Technology.

United Nations : U.S. participation in the Environment Program ; report to congressional requesters /

"GAO/NSIAD-89-142."

Examination of foods for enteropathogenic and indicator bacteria: review of methodology and manual of selected procedures.

Errata sheet inserted.

Manual of individual water supply systems. Developed in cooperation with the Joint Committee on Rural Sanitation.

"Revision of PHS Publication no. 24, Individual water supply systems [by the Joint Committee on Rural Sanitation] issued in 1950."

Administrative guide covering public health problems in recreational areas.

Mode of access: Internet.

Factors affecting N2 fixation by the cyanobacterium Trichodesmium sp. GBRTRLI101

Various factors affecting N-2 fixation of a cultured strain of Trichodesmium sp. (GBRTRLI101) from the Great Barrier Reef Lagoon were investigated. The diurnal pattern of N2 fixation demonstrated that it was primarily light-induced although fixation continued to occur for at least 1 h in the dark in samples that had been actively fixing N-2. N-2 fixation was dependent on the light intensity and stimulated more by white light when compared with blue, green, yellow and red light whereas rates of N-2 fixation decreased most under red light. Inorganic phosphorous concentrations in the lower range of treatments up to 1.2 muM significantly stimulated N-2 fixation and further additions promoted little or no increase in N-2 fixation. Organic phosphorous (Na-glycerophosphate) also stimulated N-2 fixation rates. Added combined nitrogen (NH4+, NO3-, urea) of 10 muM did not inhibit N-2 fixation in short-term studies (first generation), however it was depressed in the long-term studies (fifth generation). (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

Characterizing the physical and chemical properties of a vermicompost filter bed

Vermicompost filtration is a new on-site waste treatment system. Consequently, little is known about the filter medium properties. The aim of this preliminary study was to quantify physical and compositional properties of vermicompost filter beds that had been used to treat domestic solid organic waste and wastewater. This paper presents the trials performed on pilot-scale reactors filled with vermicompost from a full-scale vermicompost filtration system. Household solid organic waste and raw wastewater at the rate of 130 L/m(2)/d was applied to the reactor bed surface over a four-month period. It was found that fresh casts laid on the bed surface had a BOD of 1290 mg/g VS while casts buried to a depth of 10 cm had a BOD of 605 mg/g VS. Below this depth there was little further biodegradation of earthworm casts despite cast ages of up to five years. Solid material in the reactor accounted for only 7-10% of the reactor volume. The total voidage comprised of large free-draining pores, which accounted for 15-20% of the reactor volume and 60-70% micropores, able to hold up water against gravity. It was shown that water could flow through the medium micropores and macropores following a wastewater application. The wastewater flow characteristics were modeled by a two-region model based on the Richards Equation, an equation used to describe porous spatially heterogeneous materials.