The pot experiment showed that the HDMs isolated from the HYRE wetlands played a good role in diesel biodegradation.
The growth of native eplant, Scirpus triqueter, could enhance the degradation of diesel.
In the 10,000mgkg1 diesel soil, the diesel removal ratio of the HDMs soils was 16.51% higher than that of the control soil after 60 days.
The HDMs account for a reduction of 58.14% in the quantity of diesel. The diesel removal ratio in HDMs Soils was 57.2778.18%, while It was 67.4278.92% in the STL-Ms soils.
The results also proved that the degradation of the STL and HDMs Had an obvious selectivity for the n-alkanes of different molecular weights. The STL-Ms played a more remarkable role in the n-alkanesdegradation and remediation than HDMs.
The saturated hydrocar- bons were more readily degraded than the aromatic hydrocarbons in
treated soils. Moreover ,it had a good degradation effect on the range of C16–C24 n-alkanes, especially C19.
Total culturable microflora was more in rhizospheric soils than in non-rhizospheric soils. Plant roots exude organic and inorganic substances to rhizospheric soils in the process of
normal meta- bolism.
Root exudates act as substrates for soil microorganisms (Mohsenzadeh et al.,2010). The results indicated the rhizosphere Of Scirpus triqueter could promote the degradation of diesel
pollutants.
Significant correlations were observed between micro- bial populations and periodic diesel removal ratios. The experi- menta l results proved that the native plants (Scirpus triqueter L.) and the hydrocarbon-degrading microorganisms could be appro- privately matched to cure and restore the ecological environment similar to Huangpu-Yangtze River estuary wetland contaminated by diesel pollutants.