Dynamics of aluminum speciation in forest-well drainage waters from the Rhode River watershed, Maryland.
This paper reports an investigation of the dynamics of aluminum (Al) speciation in the forest-well waters from study site 110 of the Rhode River watershed, a representative sub-unit of Chesapeake Bay. Seasonal changes of Al speciation are evaluated by a modified MINEQL computer model using chemical equilibrium calculation. It was found that Al-F and Al-Org complexes were the dominate forms, whereas toxic forms of Al3+ and Al-OH were not significant. This indicates that Al toxicity is not very serious in the Rhode River area due to the high concentrations of fluoride and organic materials, even though sometimes pH is very low (approximately 4). Increased H+ or some other associated factors may be responsible for the decline in fish and amphibian population on the watershed.
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State Key Laboratory of Pollution Control and Resource Reuse, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China. bisp@nju.edu.cn
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Yang
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Chen
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D015258:Acid Rain; D000535:Aluminum / Q000737:chemistry*; D000663:Amphibians; D000818:Animals; D005399:Fishes; D005459:Fluorides / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008962:Models, Theoretical; D011157:Population Dynamics; D012621:Seasons; D012989:Soil Pollutants / Q000009:adverse effects*; D014197:Trees; D014873:Water Pollutants / Q000009:adverse effects*; D014881:Water Supply
D015258:Acid Rain; D012989:Soil Pollutants; D014873:Water Pollutants; D000535:Aluminum; D005459:Fluorides