四会市天海湖水体富营养化状况调查分析与研究

Investigation and Analysis of Eutrophication Status of Tianhai Lake in Sihui City

以叶绿素a(Chla)、透明度(SD)、总磷(TP)、总氮(TN)、高锰酸盐指数(CODMn)5项指标作为水质检测内容,采用综合营养状态指数法对四会市迳口镇水迳水库水质的营养状况进行了综合调查与分析。结果表明:水体中各项指标均有不同程度的超标排放,水迳水库中水体均已呈富营养状态,水体皆已被污染。

In this paper,the disposal of chromium（Ⅵ ）from aqueous by sponge iron is examined.The results showed that the adsorption performance was affected by dosage, response time, stirring rate, chromium（ Ⅵ ） initial concentra- tion. The adsorption mechanism was analyzed by scanning electron microscopy. The adsorption process of spongy iron for chromium（Ⅵ） accords with the Langmuir isotherm when the dosage was 30g/L,the stirring rate was 50 r/min and the response time was 340min.It could be inferred that the mechanism of disposal of chromium（Ⅵ） was the re- sults of reduction, chelating precipitation and adsorption. The research results in this paper provided a new idea to chromium（Ⅵ） pollution control.