The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Nusa Idaman Said - One of the best experts on this subject based on the ideXlab platform.
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METODA PENGHILANGAN LOGAM BERAT (As, Cd, Cr, Ag, Cu, Pb, Ni dan Zn) DI DALAM AIR LIMBAH INDUSTRI
2018Co-Authors: Nusa Idaman SaidAbstract:Industry is a potential source of water pollution, it produces pollutants that are extremely harmful to people and the environment. Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans. Inorganic industrial wastes are more difficult to control and potentially more hazardous Industries discharge a variety of toxic compounds and heavy metals. The most pollutans heavy metals are Lead, Cadmium, Copper, Chromium, Selenium, Mercury, Nickel, Zinc, Arsen and Chromium. Heavy metals are dangerous because they tend to bioaccumulate. Mercury for example, causes damages to the brain and the central nervous system, causes psychological changes and makes development changes in young children. Normally Mercury is a toxic substance which has no known function in Human Biochemistry. There are several methods to eliminate or remove heavy metals in water such as chemical oxidation process, ion exchange process, adsorption process, an electrochemical process, reverse osmosis process and other alternative methods likes biosorption. Each method has strengths and weaknesses, therefore to choose the method of removing heavy metals in wastewater depending on pollutants conditions such as concentrations of heavy metals in wastewater, types of heavy metal, heavy metal concentrations in treated water, land availability, flow rate of wastewater will be processed and other parameters. In this paper discusses several methods of removal of heavy metals in industrial wastewater such as chemical precipitation and oxidation processes, adsorption and ion exchange process. Keywords : water pollution, heavy metal, industrial wastewater, removal methods
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METODA PENGHILANGAN LOGAM MERKURI DI DALAM AIR LIMBAH INDUSTRI
2011Co-Authors: Nusa Idaman SaidAbstract:Industry is a potential source of water pollution, it produces pollutants that are extremely harmful to people and the environment. Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans. Inorganic industrial wastes are more difficult to control and potentially more hazardous Industries discharge a variety of toxic compounds and heavy metals. The most pollutans heavy metals are Lead, Cadmium, Copper, Chromium, Selenium, Mercury, Nickel, Zinc, Arsen and Chromium. Heavy metals are dangerous because they tend to bioaccumulate. Mercury for example, causes damages to the brain and the central nervous system, causes psychological changes and makes development changes in young children. Normally Mercury is a toxic substance which has no known function in Human Biochemistry. There are several methods to eliminate or remove mercury in water such as chemical oxidation process, ion exchange process, adsorption process, an electrochemical process, reverse osmosis process and other alternative methods likes biosorption. Each method has strengths and weaknesses, therefore to choose the method of removing of mercury in wastewater depending on pollutants conditions such as concentrations of mercury in wastewater, types of mercury, mercury concentrations in treated water, land availability, flow rate of wastewater will be processed and other parameters. This paper discusses several methods of removal of mercury heavy metals in industrial wastewater such as chemical precipitation and oxidation processes, adsorption and ion exchange process.
J N Egwurugwu - One of the best experts on this subject based on the ideXlab platform.
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Heavy metal pollution and Human biotoxic effects
International Journal of Physical Sciences, 2007Co-Authors: J O Duruibe, Oguwuegbu M.o.c., J N EgwurugwuAbstract:Some heavy metals have bio-importance as trace elements but, the biotoxic effects of many of them in Human Biochemistry are of great concern. Hence, there is the need for proper understanding of the conditions, such as the concentrations and oxidation states, which make them harmful, and how biotoxicity occurs. It is also important to know their sources, leaching processes, chemical conversions and their modes of deposition to pollute the environment, which essentially supports lives. Literature sources point to the fact that these metals are released into the environment by both natural and anthropogenic sources, especially mining and industrial activities, and automobile exhausts (for lead). They leach into underground waters, moving along water pathways and eventually depositing in the aquifer, or are washed away by run-off into surface waters thereby resulting in water and subsequently soil pollution. Poisoning and toxicity in animals occur frequently through exchange and co-ordination mechanisms. When ingested, they combine with the body’s biomolecules, like proteins and enzymes to form stable biotoxic compounds, thereby mutilating their structures and hindering them from the bioreactions of their functions. This paper reviews certain heavy metals and their biotoxic effects on man and the mechanisms of their biochemical activities. Keywords: Biochemical, biotoxic, environment, heavy metals, pollution.
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Heavy metal pollution and Human biotoxic effects
International Journal of Physical Sciences, 2007Co-Authors: J O Duruibe, M O C Ogwuegbu, J N EgwurugwuAbstract:Some heavy metals have bio-importance as trace elements but, the biotoxic effects of many of them in Human Biochemistry are of great concern. Hence, there is the need for proper understanding of the conditions, such as the concentrations and oxidation states, which make them harmful, and how biotoxicity occurs. It is also important to know their sources, leaching processes, chemical conversions and their modes of deposition to pollute the environment, which essentially supports lives. Literature sources point to the fact that these metals are released into the environment by both natural and anthropogenic sources, especially mining and industrial activities, and automobile exhausts (for lead). They leach into underground waters, moving along water pathways and eventually depositing in the aquifer, or are washed away by run-off into surface waters thereby resulting in water and subsequently soil pollution. Poisoning and toxicity in animals occur frequently through exchange and co-ordination mechanisms. When ingested, they combine with the body’s biomolecules, like proteins and enzymes to form stable biotoxic compounds, thereby mutilating their structures and hindering them from the bioreactions of their functions. This paper reviews certain heavy metals and their biotoxic effects on man and the mechanisms of their biochemical activities.
Jason D Morrow - One of the best experts on this subject based on the ideXlab platform.
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Human Biochemistry of the isoprostane pathway
Journal of Biological Chemistry, 2008Co-Authors: Ginger L Milne, Jason D MorrowAbstract:Free radicals derived primarily from molecular oxygen have been implicated in a variety of Human disorders including atherosclerosis, cancer, neurodegenerative diseases, and aging (1). Damage to tissue biomolecules, including lipids, proteins, and DNA, by free radicals is postulated to contribute importantly to the pathophysiology of oxidative stress. Lipids are readily attacked by free radicals resulting in the formation of a number of peroxidation products. One class of oxidation products formed in abundance in vitro and in vivo is the isoprostanes (IsoPs),2 which were discovered by our laboratory in 1990. IsoPs are a series of prostaglandin (PG)-like compounds produced by the free radical-catalyzed peroxidation of arachidonic acid independent of the cyclooxygenase (2). Over the past 20 years, we and others have carried out a large number of studies defining the basic chemistry and Biochemistry involved in the formation and metabolism of the IsoPs. In addition, we have shown that levels of IsoPs are increased in a number of Human diseases, and it is currently recognized that measurement of these molecules is the most accurate analytical method to assess oxidative injury in vivo. Further, a number of IsoPs have been found to possess potent biological activity and thus are likely also mediators of oxidant injury (3). In recent years, additional related compounds, derived from various polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) (4) and docosahexaenoic acid (DHA) (5), have been discovered to be formed as products of the IsoP pathway. It is the purpose herein to summarize our current knowledge regarding the IsoPs including the chemistry and Biochemistry of their formation, the utility of measuring these compounds as markers of in vivo oxidant stress, and their pharmacological properties.
J O Duruibe - One of the best experts on this subject based on the ideXlab platform.
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Heavy metal pollution and Human biotoxic effects
International Journal of Physical Sciences, 2007Co-Authors: J O Duruibe, Oguwuegbu M.o.c., J N EgwurugwuAbstract:Some heavy metals have bio-importance as trace elements but, the biotoxic effects of many of them in Human Biochemistry are of great concern. Hence, there is the need for proper understanding of the conditions, such as the concentrations and oxidation states, which make them harmful, and how biotoxicity occurs. It is also important to know their sources, leaching processes, chemical conversions and their modes of deposition to pollute the environment, which essentially supports lives. Literature sources point to the fact that these metals are released into the environment by both natural and anthropogenic sources, especially mining and industrial activities, and automobile exhausts (for lead). They leach into underground waters, moving along water pathways and eventually depositing in the aquifer, or are washed away by run-off into surface waters thereby resulting in water and subsequently soil pollution. Poisoning and toxicity in animals occur frequently through exchange and co-ordination mechanisms. When ingested, they combine with the body’s biomolecules, like proteins and enzymes to form stable biotoxic compounds, thereby mutilating their structures and hindering them from the bioreactions of their functions. This paper reviews certain heavy metals and their biotoxic effects on man and the mechanisms of their biochemical activities. Keywords: Biochemical, biotoxic, environment, heavy metals, pollution.
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Heavy metal pollution and Human biotoxic effects
International Journal of Physical Sciences, 2007Co-Authors: J O Duruibe, M O C Ogwuegbu, J N EgwurugwuAbstract:Some heavy metals have bio-importance as trace elements but, the biotoxic effects of many of them in Human Biochemistry are of great concern. Hence, there is the need for proper understanding of the conditions, such as the concentrations and oxidation states, which make them harmful, and how biotoxicity occurs. It is also important to know their sources, leaching processes, chemical conversions and their modes of deposition to pollute the environment, which essentially supports lives. Literature sources point to the fact that these metals are released into the environment by both natural and anthropogenic sources, especially mining and industrial activities, and automobile exhausts (for lead). They leach into underground waters, moving along water pathways and eventually depositing in the aquifer, or are washed away by run-off into surface waters thereby resulting in water and subsequently soil pollution. Poisoning and toxicity in animals occur frequently through exchange and co-ordination mechanisms. When ingested, they combine with the body’s biomolecules, like proteins and enzymes to form stable biotoxic compounds, thereby mutilating their structures and hindering them from the bioreactions of their functions. This paper reviews certain heavy metals and their biotoxic effects on man and the mechanisms of their biochemical activities.
Ginger L Milne - One of the best experts on this subject based on the ideXlab platform.
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Human Biochemistry of the isoprostane pathway
Journal of Biological Chemistry, 2008Co-Authors: Ginger L Milne, Jason D MorrowAbstract:Free radicals derived primarily from molecular oxygen have been implicated in a variety of Human disorders including atherosclerosis, cancer, neurodegenerative diseases, and aging (1). Damage to tissue biomolecules, including lipids, proteins, and DNA, by free radicals is postulated to contribute importantly to the pathophysiology of oxidative stress. Lipids are readily attacked by free radicals resulting in the formation of a number of peroxidation products. One class of oxidation products formed in abundance in vitro and in vivo is the isoprostanes (IsoPs),2 which were discovered by our laboratory in 1990. IsoPs are a series of prostaglandin (PG)-like compounds produced by the free radical-catalyzed peroxidation of arachidonic acid independent of the cyclooxygenase (2). Over the past 20 years, we and others have carried out a large number of studies defining the basic chemistry and Biochemistry involved in the formation and metabolism of the IsoPs. In addition, we have shown that levels of IsoPs are increased in a number of Human diseases, and it is currently recognized that measurement of these molecules is the most accurate analytical method to assess oxidative injury in vivo. Further, a number of IsoPs have been found to possess potent biological activity and thus are likely also mediators of oxidant injury (3). In recent years, additional related compounds, derived from various polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) (4) and docosahexaenoic acid (DHA) (5), have been discovered to be formed as products of the IsoP pathway. It is the purpose herein to summarize our current knowledge regarding the IsoPs including the chemistry and Biochemistry of their formation, the utility of measuring these compounds as markers of in vivo oxidant stress, and their pharmacological properties.