IntroductionIron has an essential r

Introduction
Iron has an essential role as a constituent of enzymes, such as cytochromes and catalase, and of oxygen-transporting proteins, such as hemoglobin and myoglobin. In fresh water, iron is also an important nutrient for algae and other organisms. Due to its high abundance within the earth’s crust, iron is ubiquitous in all freshwater environments and often reaches significantly higher concentration in water and sediments than other trace metal. High iron concentration in freshwater considered a problem. In domestic use, iron-enriched waters may induce rust formation on plumbing fixtures, the staining of laundry and a metallic taste in drinking water. Hence, much effort has been put into the retention of iron in drinking water. Iron concentration and speciation in water depends on redox and light condition, pH, and the amount and type of dissolved organic matter. Fe(II) is rapidly oxidized to insoluble Fe(III) oxyhidroxide. However, dissolved or colloidal organic material many stabilize Fe(II) and retard its oxidation. Further, Fe(III) complexed with organic compounds can be readity photoreduced by UV light to the ferrous state, which may cause large diurnal fluctuations in the speciation and concentration of iron. Acutely toxic concentration of iron in the laboratory exposures of invertebrates usually vary between 3 and 400 mg/L, direct toxic effects of iron in aquatic animals has been attributed to the motion inhibiting or smothering effect of Fe-hydroxide or Fe-humic precipitates on gills, eggs or other surfaces. LOEI province is ubiquitous of iron-rich ores in environments, which the mining of iron-rich ores has caused the degradation of many river ecosystems, such as Loei river. The iron contaminate in Loei river has been effecting the every day life of population.

ผลลัพธ์ (อังกฤษ) 3:

Introduction
Iron has an essential role as a constituent, of enzymes such as cytochromes, and catalase and of oxygen-transporting. Proteins such as, hemoglobin and myoglobin. In, fresh water iron is also an important nutrient for algae and other, organisms. Due to its high abundance within the earth ', s crustIron is ubiquitous in all freshwater environments and often reaches significantly higher concentration in water and sediments. Than other trace metal. High iron concentration in freshwater considered a problem. In domestic use iron-enriched waters,, May induce rust formation on, plumbing fixtures the staining of laundry and a metallic taste in drinking, Hence water.Much effort has been put into the retention of iron in drinking water. Iron concentration and speciation in water depends. On redox and, light condition pH and the, amount and type of dissolved organic matter. Fe (II) is rapidly oxidized to insoluble. Fe (III), oxyhidroxide. However dissolved or colloidal organic material many stabilize Fe (II) and retard its, Further oxidation.Fe (III) complexed with organic compounds can be readity photoreduced by UV light to the, ferrous state which may cause. Large diurnal fluctuations in the speciation and concentration of iron. Acutely toxic concentration of iron in the laboratory. Exposures of invertebrates usually vary between 3 and 400, mg / LDirect toxic effects of iron in aquatic animals has been attributed to the motion inhibiting or smothering effect of Fe-hydroxide. Or Fe-humic precipitates, on gills eggs or other surfaces. LOEI province is ubiquitous of iron-rich ores, in environments. Which the mining of iron-rich ores has caused the degradation of many river ecosystems such as, Loei river.The iron contaminate in Loei river has been effecting the every day life of population.
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