Migration And Transformation Of Nutrients And Heavy Metals In Mangrove Plants And Sediments From Luoyang River Estuary Of Quanzhou Bay

In recent years, as economic reform and industrial development, more and more pollutantswere discharged increasingly into Luoyang river, and the environmental problems had becomeseriously. Therefore the research of heavy metals and nutrients pollutions in this area has greatsignificance on the protection work of environmental ecology balance.In this paper, the distributional status and pollution levels of heavy metals and nutrients inthe surface and columnar sediments were researched. The total content and different forms of C,N and P nutrients were determined and the environmental indicaing meaning of the analysisresults was dicussed. The pollution levels of nutrients in this area were primarily assessedthrough single factor standard index method. The content of isotope C and N in columnarsediments was determined to analyse the sources of organic matters in this area.The content of TN and NH4-N, TP and Exch-P, Ca-P,(Fe-Al)-P, Re-P, OP were determinedto analyse the distributional charicteristics of the N, P nutrients and discuss its environmentalmeaning. The results showed that the distributional status of N, P nutrients has the positivecorrelation with the intensity of human activities to some extent. The content of TN and TP insurface sediments was relatively lower comparing with other areas. That total nitrogen content of7cores sediments in order: mudflats> Kandelia candel> Avicennia marina> Aegicerascorniculatum showed that Mangrove plants had purification to some extent. To assess thepollution levels of nutrients through single factor standard index method, the results showed thatthe pollution of TP and TN was low level. The results of the analysis of isotope C and N todiscuss the possible sources of organic matters in this area showed that the organic matters in A,C, D core mainly derived from both mainland plants and sea algaes, showed the mixed both landand sea characteristics.Correlation between heavy metals and heavy metals in mangrove plants of Luoyang rivershowed that: most heavy metals in the mangrove roots (branches, leaves the Department) hascertain positive correlation, indicating that when roots (branches, leaves) of mangrove plantsabsorbed heavy metals, most heavy metals went together into plant roots (branches, leaves)without conflict except Cd.Content of K was between1%to3.5%, Ca and Mg were followed. Ca, Mg and N mostlystored in the leaves; P mostly stored in the leaves, difference of the content in roots and brancheswas small. Correlation between heavy metals and nutrients in roots (branches) of mangrove plants inLuoyang River showed that N and P had a significant positive correlation (r0.5) with mostheavy metals except Cd. The collection suggested N and P promoted the absorption of heavymetals whlie K, Ca and Mg were not. Correlation between heavy metals and nutrients in leavesof mangrove plants in Luoyang River showed that P had a significant positive correlation (r0.5)with most heavy metals except Cd. The collection suggested P promoted the absorption of heavymetals whlie N, K, Ca and Mg were not.