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Clarkson, W. W.; And Others – 1978
The treatment of wastewater phosphorus via land application includes both chemical and biological mechanisms. Chemically, phosphorus reacts with iron, aluminum, and calcium compounds in the soil providing efficient removal over a wide range of pH values. Phosphorus is also absorbed by rooted plants which, upon harvest, constitute a further removal…
Descriptors: Chemistry, Environment, Land Use, Learning Modules
Clarkson, W. W.; And Others – 1978
Five elements are identified as being potentially hazardous in this module. These are boron, cadmium, copper, molybdenum, and nickel. The hazards to plants and animals posed by these elements are discussed in some detail. The sources of toxic elements in sewage and the factors that effect the uptake of toxic elements by sewage sludge are also…
Descriptors: Chemistry, Environment, Instructional Materials, Land Use
Clarkson, W. W.; And Others – 1978
This module expands on the introductory discussion of nitrogen in other modules. The various chemical forms of nitrogen found in land treatment systems are defined. Inputs from waste application as well as natural sources are quantified for typical situations. A discussion of nitrogen transformations in the soil includes mineralization and…
Descriptors: Biology, Chemistry, Environment, Land Use
Clarkson, W. W.; And Others – 1978
This module examines the basic properties of soil which have an influence on the success of land treatment of wastes. These relevant properties include soil texture, soil structure, permeability, infiltration, available water capacity, and cation exchange capacity. Biological, chemical and physical mechanisms work to remove and renovate wastes…
Descriptors: Biology, Chemistry, Environment, Instructional Materials
Clarkson, W. W.; And Others – 1978
This module introduces the physical, biological, and chemical constituents of wastewaters and sludges which are of concern in land treatment systems. The characteristics of typical municipal wastewater are tabulated for strong, medium, and weak sewages. Some of the factors affecting pollutant concentrations are listed. Flow, distribution and…
Descriptors: Biology, Chemistry, Environment, Instructional Materials
Download full textJones, Naomi – 1974
Presented is a Learning Activity Package (LAP) study concerned with carbon and its compounds. This LAP in chemistry includes a rationale for studying the chemical element of carbon, a list of student objectives (stated in behavioral terms), of activities (reading, laboratory experiments, model construction, etc.), a two-page worksheet, a…
Descriptors: Chemistry, Individualized Instruction, Instructional Materials, Learning Activities
Kalra, R. M. – 1973
The program is a terminal course in chemistry for 9-12 grade students who are non-science majors, low achievers, and/or American Indians. Its objectives include to provide a systematic and practical overview of the discipline of chemistry; to change student behavior through this knowledge; to develop social responsibility, scientific attitude, and…
Descriptors: American Indians, Atomic Structure, Chemistry, Community Influence
