Concentrate disposal

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  • In order to maintain economic development and minimize future regional and international conflicts, the United States will need sustainable supplies of high-quality fresh water. Solutions to local water scarcity issues will likely require a combination of approaches, including demand management, improved water storage capacity, water quality protection, and advancements in supply-enhancing water treatment technologies. Desalination technologies can create new sources of freshwater from otherwise impaired waters such as seawater or brackish water.

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  • Most interesting was the discovery that cytochrome P450 aromatase, which is capable of converting androgens into estrogens, is present in the testis [25–39]. During this same period of discovery, others were using the radioim- munoassay to identify steroids present in body fluids and estrogen concentrations were found to be relatively high in seminal and rete testis plasma [40–48]. Thus, up to the 1990's it appears that most scientific inquiry into estro- gen's presence in the male remained a curiosity, as well as a worry that estrogen exposure during development was harmful.

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  • Care should be taken in choosing preservatives. For example, Method 5035 notes that, “Soil samples that contain carbonate minerals (either from natural sources or applied as an amendment) may effervesce upon contact with the acidic preservative solution in the low concentration sample vial.” Therefore, calcareous soils that effervesce on contact with the preservative solution, which is intended for low-level samples, should be preserved using an alternative technique.

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  • This study, the first to investigate workplace contamination in areas in Ghana where e-waste recycling and disposal is carried out, focussed on the main centre for this type of work, at the Agbogbloshie scrap market in Ghana’s capital, Accra. One of the numerous similar, though far smaller, operations that take place throughout Ghana was also investigated, at the location of a scrap dealer in Korforidua, a smaller city to the north of Accra. At these workshops, e-waste is recycled in a crude way, primarily involving manual disassembly and open burning to isolate copper from plastics.

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  • The Fund’s exposure to liquidity risk is concentrated in the daily cash redemptions of shares. The Fund primarily invests in securities that are traded in active markets and can be readily disposed. In addition, the Fund retains sufficient cash and cash equivalent positions to maintain liquidity. The Fund may, from time to time, enter into over-the-counter derivative contracts or invest in unlisted securities, which are not traded in an organized market and may be illiquid.

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  • Point source wastewater treatment-Farms with large livestock and poultry operations, such as factory farms, are called concentrated animal feeding operations or confined animal feeding operations in the U.S. and are being subject to increasing government regulation. Animal slurries are usually treated by containment in lagoons before disposal by spray or trickle application to grassland. Constructed wetlands are sometimes used to facilitate treatment of animal wastes, as are anaerobic lagoons.

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