水花生对水体中重金属Pb^(2+)的富集作用研究

Study on Enrichment of Heavy Metal Pb^(2+) in Water by Alternanthera Philoxeroides

水花生对水体中重金属Pb2+的富集作用研究表明,重金属Pb2+浓度为5mg／L,pH为7．0-8．0 (pH为7．5最佳),处理温度为25℃-30℃(温度25℃最佳)时;在处理时间为7d以后,水花生净化Pb2+可以达到低于国家标准所允许排放的最高浓度0．2mg／L．

The results of study on enrichment of heavy metal Pb^2＋ in water show that the water can be purified by Alternanthera philoxeroides. When heavy metal Pb^2＋ is 5.0mg/L, pH is 7.0-8.0（optimum is 7.5）, temperature is 25 ℃ -30℃ （optimum is 25 ℃）, and disposal time is 7 days or more, the existing Pb^2＋ in the water is less than 0.2mg/L （standard of the state）.