简报
郭静,阮宜纶,林荣忱.水生植物对地热废水净化作用的研究[J].环境科学学报,1995,15(2):251-255
水生植物对地热废水净化作用的研究
- PURIFICATION CAPACITY OF AQWUATIC PLANTYS IN TREATMENT OF GEOTHERMAL WASTEWATER
- 摘要：我国华北地区地热水资源丰富.地热水由地下抽取上来，可以直接地用于采暖、沐浴、理疗、温室栽培、渔业养殖等方面.利用后的地热废水，目前多是不经任何处理而直接排入附近的沟渠洼地之中.华北地区地热水中的含盐量一般都比较高(＞2000 mg/L),而且还含有氟、砷、锡等某些有害的化学成分，尤其是氟，其含量多在7 mg/L左右.地热废水若不经适当的处理而随意地直接排放，其中的氟及其它有害成分就会因为渗透、迁移、富集作用，造成地下水污染、土壤侵蚀等许多环境问题，甚至进入食物链直接地危害人体健康.
- Abstract：The geothermal wastewater in north China usually has high salinity,and contains ofharmful chemical elements,especially fluorine. The F content in the wastewater is around 7mg/L. The direct discharge of the wastewater is a source of environmental pollution. Use ofaquatic plants to purify the geothermal wastewater is an economical and effective method.The results of a pilot scale study indicated that aquatic plants,such as water hyacinth,phragmites communis,and typha orientalis, could grow in geothermal wastewater subjectedto pretreatment with lime precipitation technique and may absorb F,As,and Cd from thewastewater,The wastewater after purification can be used for irrigation purpose.
- Key words：geothermal wastewater fluoride aquatic plants
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