Ecomaterial Technology for Fluoride-polluted Ground Water in China

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Since the cause of various health problems in the most areas of China is due to the high fluorine and arsenic content in drinking water, the principal means of prevention is to decrease the concentration of fluorine and arsenic in drinking water. To remove pollutants such as fluorine and arsenic from ground water in China, it is necessary to clear up the following problems : energy saving, resources savings and environmental protection.In this research project, we assessed the systems of pollutants removal from ground water from the view point of environmentally conscious technology. Results of this research project are summarized as follows :(1) Problems of fluorine and arsenic in China are quite serious conditions. Therefore, water treatment technique adapted to economic and technological conditions of China is required.(2) To remove fluorine in polluted water, conversion reaction of calcium phosphates is quite useful. Calcium phosphates is converted to fluoroapatite (FApCaィイD210ィエD2(POィイD24ィエD2)ィイD26ィエD2FィイD22ィエD2: Ap = apatite), which is one of natural fluoride resources. Using this reaction, fluoride ions in drinking water is removed as Fluoride-apatite with high efficiency.(3) It is appeared that waste from marine products industry, such as fish bone and shells, are able to use start materials for the removal of fluorine from polluted water.