Waste disposal environmental concerns

Fig. 2-55. The disposal at sea of surplus and leaking chemical munitions and radiological wastes generated environmental concerns that eventually brought sea dumping to a halt. Photograph Chemical and Biological Defense Command Historical Research and Response Team, Aberdeen Proving Ground, Md.

See Appendix I for a more detailed set of requirements. Specific issues include mission requirements, potential burnup criteria, heat rejection, economic resources, environmental impact, safety, technology development risk, completion schedule, repository issues, social and political acceptance, and diversion and proliferation. In addition to these issues, others that need to be considered include plutonium handling, waste disposal, environmental regulations, safety regulations and analysis, safeguards and security, technology development, economic analysis, and government and public policies. A variety of reactor concepts exists, and each concept has unique and specific concerns. The intent is not to present a complete set of requirements, but to briefly discuss a few selected issues. 

Developments in hydiaulic fluids are driven by environmental concerns including disposal of waste, waste rninirnization, biotoxicity, effects on human... 

The past two decades have seen an increased social awareness of the impact of modern-day hfestyles on the environment. Pubhc environmental concerns include issues such as waste disposal hazardous-material regulations depletion of natural resources and air, water, and laud pollution. Nevertheless, roughly one-half of the total quau-... 

Although the problems associated with the corrosion and protection of jointed structures have been recognised since the early days of structural fabrication, they have taken on a special significance in the past 15 years. The motivation for the increased impetus is mainly one of concern over possible costly, hazardous or environmentally unfriendly failures particularly those concerned with offshore constructions, nuclear reactors, domestic water systems, food handling, waste disposal and the like. 

Waste generated (disposal cost, environmental concerns),... 

Environmental serious environmental concern (i.e. mercury, detergents) Recommendations use less toxic alternatives, dispose of hazardous wastes properly... 

Every year millions of cubic meters of ready-mixed concrete are returned for disposal in dump sites. There are now increasing environmental concerns and restrictions regulating the disposal of returned plastic concrete. In the last decade, environmental protection agencies in Europe and North America have classified both returned plastic concrete and truck wash water as hazardous waste. Consequently, the conventional methods of disposal in slurry tanks and landfill sites have become redundant, and disposal of plastic concrete is now a major problem for the ready-mixed concrete industry [102]. 

This chapter will explain how polyurethanes can play important roles in achieving acceptable equilibrium. Before we begin that discussion, we should discuss our most visible environmental problem — treatment of human waste. In the previous section, we covered the establishment of the equilibrium of SOCs, VOCs, and lOCs. The environmental effects of our daily existence resulting from personal hygiene and personal waste control are of immediate concern. Arguably, the types of pollution mentioned in the previous paragraphs warrant continuous monitoring. Human sanitary waste disposal requires continuous action. 

Severe local arsenic pollution can occur adjacent to industrial enterprises producing the various arsenicals used in timber preservation and as agricultural pesticides. Concern expressed by environmental groups has led to a reduction in the use of arsenicals in agriculture over the last decade, and this trend is likely to continue. Waste disposal is the main problem in industrial arsenic production and this problem has been responsible for closing several plants in Western Europe. 

Constraints due to regulations concerning environmental protection, such as limitations in the choice of solvents, waste disposal, and work-up procedures. 

ENVIRONMENTAL CHEMISTRY. That aspect of chemistry concerned with air and water pollution, pesticides, and chemical and radioactive waste disposal. A random selection of specific areas of research includes. (l)Lead and other toxic chemicals in the air. 

The sorptive behavior of pesticides and organic pollutants can be studied from either equilibrium or kinetic viewpoints. While both are important, perhaps the time-dependent processes are least understood. As environmental concerns intensify about groundwater pollution, waste disposal, and soil detoxification, it will become increasingly important to better understand the kinetics and mechanisms of pesticide and organic pollutant interactions with soils. For comprehensive treatments on pesticides and... 

One of the main concerns of any environmental project is the collection of relevant and valid data. These are the data of the type, quantity, and quality that are appropriate and sufficient for the project decisions. The standards for data relevancy and validity stem from the intended use of the data since different uses require different type, quantity, and quality of data. For example, the data requirements for a risk assessment project are drastically different from those of a waste disposal project the requirements for site investigation data are different from these for site closure. 

In recent years, environmental concerns over water quality have led to installation of waste water treatment plants at pulp and paper mills. The underflow from the primary clarifier has generated another solid waste disposal problem. To solve this problem, some mills are feeding clarifier sludge to hog fuel boilers. The high moisture content of the sludge in conjunction with its low Btu content creates more difficult operating conditions for the furnace. Comparative composition of TDF, coal, wood waste,... 

There is no current commercial biologic process for the production of succinic acid. In past laboratory systems, when succinic acid has been produced by fermentation, lime is added to the fermentation medium to neutralize the acid, yielding calcium succinate (2). The calcium succinate salt then precipitates out of the solution. Subsequently, sulfuric acid is added to the salt to produce the free soluble succinic acid and solid calcium sulfate (gypsum). The acid is then purified with several washings over a sorbent to remove impurities. The disposal of the solid waste is both a directly economic and an environmental concern, as is the cost of the raw materials. Some key process-related problems have been identified as follows (1) the separation of dilute product streams and the related costs of recovery, (2) the elimination of the salt waste from the current purification process, and (3) the reduction of inhibition to the product succinic acid on the fermentation itself. Acetic acid is also a byproduct of the fermentation of glucose by Anaerobiospirillium succiniciproducens almost 1 mol of acetate will be produced for every 2 mol of succinate (3). Under certain cultivation conditions by a mutant Escherichia coli, lesser amounts of acetate can be produced (4,5). This byproduct will also need to be separated. 

Despite the unique synthetic possibilities offered by organotin reagents, their use in the chemical industry has steadily declined in recent years as a result of perceived toxicity and environmental concerns associated with disposal of tin wastes.30-31 Consequently, appreciable efforts have been made to develop heavy metal-free alternatives based on silicon, germanium, or phosphorus chemistry. Other strategies have been applied to immobilize the tin reagents or to reduce their usage to less than stoichiometric amounts. 

The environmental impact of waste disposal and of chemical use in Europe has led to three legislative actions that, in today s global economy, greatly affect flame-retardant use and research. These actions go by the acronyms of RoHS (Reduction of Hazardous Substances), WEEE (Waste Electrical and Electronic Equipment), and REACH (Registration, Evaluation, Authorisation, and Restriction of Chemical substances). These actions are discussed in detail in Chapter 22, but need to be mentioned here as they are clear examples of how changing regulations affect flame-retardant use, selection, and new fire-safety developments. The first one, RoHS, refers to how new items are manufactured, and specifically bans chemicals and elements of environmental and toxicological concern in Europe. One fall-out item of RoHS is the move from a lead-based solder on circuit... 

Objectives Gather data from ANCDF and contractor personnel on site-specific secondary waste disposal issues related to committee task. Discuss specific regulatory issues and concerns with Alabama Department of Environmental Management (ADEM) and gain input and perspective on secondary waste issues from local citizens. 

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