有机物分子质量对生物滤柱除铁的影响

Influence of Molecular Mass of Natural Organic Matter on Biological Removal of Iron

研究了用生物过滤法去除地下水中的铁。用分子膜过滤法分离一定分子质量的天然有机物,考察了生物除铁滤柱对不同分子质量有机物的去除效果。结果表明,有机物分子质量的大小对出水水质有一定影响:有机物分子质量越大,滤柱的铁去除率越低,有机物DOC和UV254去除率也低;生物滤柱对含分子质量<1 000的有机物的原水中DOC和UV254去除率较高,而对含分子质量>30 000的有机物的DOC和UV254去除率不甚理想。

Removal of iron in groundwater using biological filtration column are researched. Natural organics with different molecular mass can be removed using molecule filtration membrane. Test results show that the molecular mass of organic influenced effluent quality. The greater organic molecular mass is,the lower the removal rate of iron is, DOC and UV254. Removal rate of DOC and UV254 in groundwater with organic of molecular mass less than 1000 are 82.4% and 65.8%, respectively, but Removal rate of DOC and UV254 in groundwater with organic of molecular mass more than 30 000 are 28.5% and 54.3% ,respectively.