渤海湾水体富营养化与有机污染状况初步评价

根据2008年渤海湾的生态调查资料,探讨了该海域的富营养化状态。阐述了渤海湾营养盐变化特征,并对盐度、pH值、溶解氧(DO)、叶绿素-a、PO4-P、NO2-N、NO3-N、NH4-N等进行了分析讨论,且对海域进行了富营养化评价及有机污染评价。结果显示:与Redfied提出营养结构的N/P比值相比较,渤海湾的营养结构符合P限制,根据营养状态指数评价模式和有机污染评价指数计算结果,2008年渤海湾水体属富营养化状态,已属于轻度有机污染。

Spacial Distribution Characteristics, Activity and Degradation Capability of the Biofilm in Integrated Vertical-flow Constructed Wetland

The spacial distribution characteristics, activity and degradation capability of the biofilm in integrated vertical-flow constructed wetland were investigated. Results showed that the biofilm widely distributed in the substrate of integrated vertical-flow constructed wetland and mainly in the 0-10 cm top layer where the activity ofdehydrogenase of the biofilm was also higher than that of other layers. The water quality could also affect the activity of the biofilm, for the TF（1,3,5-Triphenylformazan） amount reduced by the biofim incubated in water of the higher eutrophication was larger, too. The PCP （pentachlorophenol） removal rate by the substrate with biofilm was 1.5 times that without biofilm. In total, the biofilm of the down-flow chamber appeared larger biomass, higher dehydrogenase activity and stronger degradation capability of organic contamination than that in up-flow chamber and it was the major place for removal of the organic matters in waste water.