| Eutrophication has become important environment problemsthat draw our attention in the fields of water resources management. The basic reason of eutrophication is the excessive nutrients in water,in which the main controlling factors are nitrogen and phosphorus. The main reason is largely due to the release of nutrients from sediments into overlying water through physical, chemical and biological exchange.So it is necessary to do further study about controlling the inner pollution of sediment of the lakes (reservoirs).In this experiment, The sediments of Tangyu reservoir in Xi'an City and Yangzhou canal is the research object. Based on the laboratory static simulation of sediment-water interface environment,the effect of chemical stabilization inhibiting pollutions releasing from sediment,and the technology of filler in situ coverage+immobilized microorganisms removing pollution from water were studied. Chemical stabilization with Water-lifting Aerator controling sediments pollutants released results show that:(1) As shown in the data of experiment, it can be concluded that this new method can inhibit phosphorus releasing from sediment effectively. As to reactors (2#-5#), it can be concluded that the higher the PAC concentration was, the better the inhibiting efficiency was. And the PAM can strengthen the inhibiting efficiency of PAC, which was illustrated by the curve 5#. The mean E of 2#-6# for PO43- were 37.06.%,41.36%, 49.96% and 63.16% and 88.38% respectively. After 20 days incubation time, the E of reactor (6#) was kept constant at 95% or so, which was higher than that of others. (2) Chemical stabilization can inhibit Fe2+ releasing from sediment effectively,the researche on pollutants releasing from the sediments indicated that the Fe2+ released into the overlying water was positively correlated with phosphate concentration. As to Fe2+, the corresponding values of 2#-6# were 28.75%,49.52%,69.52%,89.49% and 82.88% respectively.(3) It can be concluded that at aerobic condition Ca(NO3)2 can accelerate Mn release from sediments and at anaerobic condition which opposited to that of in an anaerobic or anoxic condition(4) As2#-5#,all these agents were effective in inhibiting the release of NOM and the mean E value of them were 36.22%,25.02%,30.75%,34.09% and 39.53% respectively. The inhibiting efficiency PAC and PAM on NOM was positively correlated with Zeta potential.(5) Phosphorus form in sediment analysis results show:the PO43- released into overlying water was main from Fe/Al-P,while Ca-P was considerable stable.For high concentration nitrogen and phosphorus pollution in landscape water sediment(Yangzhou canal). Studying the condition of different oxygen, the technology of controlling nitrogen and phosphorus release by calcite in situ treatment, filler coverage (zeolite, calcite and compound capping with zeolite and calcite) biological filter media filler in situ coverage+biological filter media(1) The results showed that zeolite can inhibit ammonia releasing from sediment effectively. The mean E of zeolite for ammonia were84.3.%. For removal rate of phosphate, the calcite remove phosphorus effectively than other kinds of filler.The mean E of calcite for phosphate were 87.9%.(2) In the high concentration ammonia of landscape water, combined filler and biological filter media can remove ammonia from water effectively.the removal rate were 79.98% and 74.31% respectively. Filter and calcium nitrate can improve microbial activity and speed up the removal rate of ammonia.(3) Compared with filler, biological filter urge phosphate to release to surface water from sediments.
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