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Abiodun S. Momodu Elizabeth F. Aransiola Inioluwa D. Okunade Grace O. Ogunlusi Kehinde N. Awokoya Ibikunle O. Ogundari Olutope T. Falope Oladotun W. Makinde John‐Felix K. Akinbami 《Natural resources forum》2019,43(2):73-81
The study focused on Nigeria's polyurethane (PU) production process as a test case. Though it is currently insignificant when viewed from a global perspective, PU production in Nigeria is not eco‐friendly. Traditionally, PU is produced by reacting petro‐based polyol with a poly‐isocyanate, which is made from amines and phosgene and are currently imported into the country. These two materials are detrimental to the human health and environment, indicating that Nigeria's PU industries need to re‐examine their production inputs for environmental compliance. The objective of this study is to review the PU industry for nontoxic reagents that could be sourced locally vis‐à‐vis overcoming sustainable development (greening the economy) challenges in Nigeria. Non‐isocyanate polyurethane (NIPU) is preferred to petro‐polyurethane because, in comparison, NIPU has improved thermal and chemical resistance, porosity and water absorption, and is less toxic. Engaging local resources to produce PU is economically feasible; in addition, NIPU is relatively advantageous to human health and the environment. Aside from being economically feasible, production of NIPU in Nigeria has the propensity to greatly enlarge the growth of the existing PU industry to tremendous heights and contribute to diversifying and improving the overall economy. 相似文献
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A survey of cadmium residues in shellfish from the Atlantic Coast of South Carolina was undertaken to see the magnitude of cadmium contamination in the South Carolina Fishery. The shellfish collected were oysters, clams, crabs, shrimps, and scallops. Shellfish samples were dissected and pieces of edible muscle tissue were incubated in reagent grade nitric acid, at a constant temperature shaking-water bath at 58°C. Cadmium levels were determined by flame atomic absorption. The distribution pattern of the element Cd in shellfish is different in various species. It seems that shellfish contained more Cd content levels than other saltwater boney fish. It was found that Cd levels were relatively higher in oysters, shrimps, and clams than crabs and scallops. Larger shellfish had higher Cd content than the smaller shellfish of the same species. Elevated levels of Cd found in these shellfish species of edible fish were not high enough to render them dangerous for human consumption. 相似文献
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Richard Engeman Troy Hershberger Steve Orzell Rodney Felix Gary Killian John Woolard Jon Cornman David Romano Chet Huddleston Pat Zimmerman Chris Barre Eric Tillman Michael Avery 《Environmental science and pollution research international》2014,21(12):7689-7697
Feral swine were targeted for control at Avon Park Air Force Range in south-central Florida to avert damage to sensitive wetland habitats on the 40,000-ha base. We conducted a 5-year study to assess impacts from control to this population that had been recreationally hunted for many years. Control was initiated in early 2009. The feral swine population was monitored from 2008 to 2012 using a passive tracking index (PTI) during the dry and wet seasons and using recreational hunter take rates from the dry season. All three indices showed substantial feral swine declines after implementing control, with indices leveling for the final two study years. Military missions and recreational hunting seasons impacted temporal and spatial consistency of control application, thereby limiting further impacts of control efforts on the feral swine population. The PTI was also able to monitor coyotes, another invasive species on the base, and detect Florida black bear and Florida panther, species of particular concern. 相似文献
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