Hazardous waste applicability

MIPs are rationally designed using various computational methods for pharmaceutical applications. Theoretical predictions can work hand-in-hand with the experiments to design the MIPs, saving time and money and limiting environmentally hazardous wastes. Application of theoretical calculations can significantly limit the number of experiments performed for the selection of the best compound for a particular experiment. These calculations... 

McRee, RE, Controlled-air incinerators for hazardous waste application theory and practice, Proc, APCD Int. Workshop Ser. on Hazardous Waste, New York, April 1, 1985. 

As shown in Figure 16.13, electrolysis is a process in which one species in solution (usually a metal ion) is reduced by electrons at the cathode and another gives up electrons to the anode and is oxidized there. In hazardous waste applications, electrolysis is most widely used in the recovery of cadmium, copper, gold, lead, silver, and zinc from sources such as spent metal plating solutions. An electrolysis procedure has been described for the recovery of copper from cyanide-containing... 

Pumps for Corrosive or Toxic Applications. For some appHcations, pumpage is not only severely corrosive but also toxic, so that the pumpage must be contained with 2ero leakage (see Waste tee atment, hazardous wastes). One possibiHty is to employ a magnetically driven pump having a nonmetaUic, usually Teflon, liner at the Hquid end. 

Zomberg, R. and B. Wainwright, Waste Minimization Applications in Industiy and Hazardous Waste Site Remediation, Riverdale, New York, 1992/1993, p. 37. 

The application of waste-management practices in the United States has recently moved toward securing a new pollution prevention ethic. The performance of pollution prevention assessments and their subsequent implementation will encourage increased activity into methods that 1 further aid in the reduction of hazardous wastes. One of the most important and propitious consequences of the pollution-prevention movement will be the development of life-cycle design and standardized hfe-cycle cost-accounting procedures. These two consequences are briefly discussed in the two paragraphs that follow. Additional information is provided in a later subsection. 

Because many of the techniques, especially those associated with the recovery of materials and energy and the processing of solid hazardous wastes, are in a state of flux with respect to application and design criteria, the objective here is only to introduce them to the reader. If these techniques are to be considered in the development of waste-management systems, current engineering design and performance data must be obtained from consultants, operating records, field tests, equipment manufacturers, and available literature. 

Applications Deep-well injection has been used principally for liquid wastes that are difficult to treat and dispose of by more conventional methods and for hazardous wastes. Chemical, petrochemical, and pharmaceutical wastes are those most commonly disposed of with this method. The waste may be liquid, gases, or solids. The gases and solids are either dissolved in the liquid or are carried along with the liquid. 

Adsorption — An important physico-chemical phenomenon used in treatment of hazardous wastes or in predicting the behavior of hazardous materials in natural systems is adsorption. Adsorption is the concentration or accumulation of substances at a surface or interface between media. Hazardous materials are often removed from water or air by adsorption onto activated carbon. Adsorption of organic hazardous materials onto soils or sediments is an important factor affecting their mobility in the environment. Adsorption may be predicted by use of a number of equations most commonly relating the concentration of a chemical at the surface or interface to the concentration in air or in solution, at equilibrium. These equations may be solved graphically using laboratory data to plot "isotherms." The most common application of adsorption is for the removal of organic compounds from water by activated carbon. 

For PM applications, wet scrubbers generate waste in the form of a slurry or wet sludge. This creates the need for both wastewater treatment and solid waste disposal. Initially, the slurry is treated to separate the solid waste from the water. The treated water can then be reused or discharged. Once the water is removed, the remaining waste will be in the form of a solid or sludge. If the solid waste is inert and nontoxic, it can generally be landfilled. Hazardous wastes will have more stringent procedures for disposal. In some cases, the solid waste may have value and can be sold or recycled. 

The EPA I.D. Number is a 12-digit number assigned to facilities covered by hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA). Facilities not covered by RCRA are not likely to have an assigned I.D. Number. If your facility is not required to have an I.D. Number, enter not applicable. NA, in box a. If your facility has been assigned EPA Identification Numbers, you must enter those numbers in the spaces provided in Section 3.8. 

Enter in the spaces provided, the name and address of each location (other than POTWs) to which you ship or transfer wastes containing toxic chemicals. Do not include locations to which you ship the toxic chemical for recycle or reuse, tf you do not ship ortransfer wastes containing toxic chemicals to offsite locations, enter not applicable, NA in the off-site location name line of 2.1. Also enter the EPA Identification Number (RCRA I.D. Number) for each such location if known to you. This number may be found on the Uniform Hazardous Waste Manifest, which is required by RCRA regulations. Also indicate in the space provided whether the location is owned or controlled by yourfacility or your parent company. If thefacility does not have a RCRA 1.0. number, enter not applicable, NA, in this space. 

Enter one of the following codes to identify the type of treatment or disposal method used by the off-site location for the chemical being reported. You should use more than one line for a single location when the toxic chemical is subject to different disposal methods the same location code may be used more than once. You may have this information in your copy of EPA Form SO, Item S of the Annual/Biennial Hazardous Waste Treatment, Storage, and Disposal Report (RCRA). Applicable codes for Part III, Section 6(c) are as follows ... 

This section provides an overview of the engineering technologies and applications that are currently applicable to the study and remediation of releases of hazardous wastes and constituents from RCRA (Resource Conservation and Recovery Act) facilities and those sites which parallel Superfund sites. Activities which would be termed removal actions or expedited response actions under CERCLA (Comprehensive Environmental Recovery-Cleanup and Liability Act) are also covered in this section. Information presented in this section represent excerpts from document EPA/625/4-89/020 (September 1989). 

Table 6. Geophysical Techniques, Their Application and Limitations at Hazardous Waste Sites (Johnson, 1986)...

Technique Technology Description Utilization at Hazardous Waste Sites Limitation on Application... 

Lappala, E. and G. Thompson. Detection of Groundwater Contamination by Shallow Soil Gas Sampling in the Vadose Zone and Applications. In Management of Uncontrolled Hazardous Waste Sites Proceedings, Hazardous Materials Control Research Institute,Washington, D.C., 1984. 

Corrective Action Application At a hazardous waste treatment storage and disposal facility in Washington State, a cyanide-bearing waste required treatment. The influent waste stream contained 15 percent cyanide. Electrolytic oxidation was used to reduce the cyanide concentration to less than 5 percent. Alkaline chlorination was used to further reduce the cyanide concentration to 50 mg/1 (the cleanup objective). The electrolytic process was used as a first stage treatment because the heat of reaction, using alkaline chlorination to treat the concentrated cyanide waste, would be so great that it would melt the reactor tank. 

Solidification/Stabilization technologies are techniques designed to be used as final waste treatment. A major role of these processes is posttreatment of residuals produced by other processes such as incineration or chemical treatment. In some cases, solidification/ stabilization processes can serve as the principal treatment of hazardous wastes for which other detoxification techniques are not appropriate. High volume, low toxicity wastes (such as contaminated soils) are an example of this application. 

Applicability Most hazardous waste slurried in water can be mixed directly with cement, and the suspended solids will be incorporated into the rigid matrices of the hardened concrete. This process is especially effective for waste with high levels of toxic metals since at the pH of the cement mixture, most multivalent cations are converted into insoluble hydroxides or carbonates. Metal ions also may be incorporated into the crystalline structure of the cement minerals that form. Materials in the waste (such as sulfides, asbestos, latex and solid plastic wastes) may actually increase the strength and stability of the waste concrete. It is also effective for high-volume, low-toxic, radioactive wastes. 

Permit application assistance for hazardous waste facilities on diskettes. 

These types of sites have been the subject of debate concerning applicability of traditional hazardous waste approaches. 

Lessons learned provide valuable information for managing health and safety programs. This information addresses conditions to be avoided or recommended practices. Lessons learned typically have the potential for wide-ranging application. Effective identification of lessons learned requires an awareness of emerging practices, programs, and technologies related to hazardous waste activities [3]. 

Other sites provided general provisions for acceptable training programs but lacked the site-specific detail necessary to implement a successful program. Eor example, the contractor s plan at Site E contained a requirement that all project field personnel receive training in accordance with applicable OSHA standards, including a minimum of 40 hours of hazardous waste operations training. The plan did not contain,... 

Under RCRA. each facility must contain a contingency plan designed to minimize hazards to human hetiltli or tlie enviromiient from fires, explosions, or tuiy unplanned sudden or nonsudden release of hazardous w aste or hazardous waste constituent to air. soil, or surface water. The items tliat follow are applicable to each contingency plan. 

The most important routes of exposure to endosulfan for the general population are ingestion of food and the use of tobacco products with endosulfan residues remaining after treatment. Farmers, pesticide applicators, and individuals living in the vicinity of hazardous waste disposal sites contaminated with endosulfan may receive additional exposure through dermal contact and inhalation. 

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