Study On Stabilizing Purification Technology Of Ecological Concrete Slope

With the rapid development of urbanization,impervious materials have gradually replaced the natural underlying surface,the rapid increase of motor vehicles and human production and living,resulting in the city's surface runoff contains large amounts of organic pollutants,heavy metals and so on.These contaminants,along with surface runoff,flush into urban rivers,polluting water bodies and damaging the ecological environment,causing terrible life impacts to urban residents.As a LID facility,the eco-concrete slope bank plays a key role in intercepting and purifying the urban runoff rainwater.To study the structural performance of ecological concrete,in the society,based on the widely promoted applied ecological concrete slope bank,the research on improved ecological concrete will further improve the water purification ability and vegetation effects of the ecological concrete slope bank.Dissolved organic matter?DOM?and heavy metal?HM?are two important pollutants in urban surface runoff.The DOM structure is complex and contains a large number of functional groups that can be combined with HM,and the structural properties and migration and transformation of DOM and HM.It has a profound influence on the interaction among pollutants in different types of ecological concrete slopes,and grasps the structure,migration and transformation patterns of pollutants,providing a mechanism analysis for the further removal of pollutants.In this paper,the preparation method of ecological concrete and its structural properties were studied by orthogonal experiments,and the optimal design mix ratio was found.Through experimentation,a cement mixing method for preparing agitated cement was developed.In combination with vibrating,compaction and smoothing techniques,ECs meeting the design requirements were prepared.Combined with the results of orthogonal experimental data,it was found that the relationship between the main parameters of ecological concrete indicators.Get the optimal design mix ratio.Based on the optimal design mix ratio,an improved ecological concrete slope bank is designed and constructed.Compared with the structural performance of the applied ecological slope bank,it is found that the strength is reduced and the alkalinity is suitable for vegetation growth.Studying and comparing the water purification ability of different types of ecological concrete slopes found that:The improved water quality purification effect of ecological concrete slope bank is stronger than that of applied ecological concrete slope bank.In addition,the use of fluorescence spectroscopy combined with analytical methods such as PARAFAC resulted in the following results:Different types of ecological concrete slopes have a good removal effect of DOM-like protein-like substances and humus-like substances in water bodies,and improved ecological slope banks The removal effect is significantly better than that of the applied ecological concrete.The interactions between pollutants in different types of ecological concrete slope banks were studied.The complexation mechanism of Cd²⁺and DOM samples was analyzed by fluorescence quenching titration experiments.The experimental results showed that the interaction between Cd²⁺and protein-like components was obvious.Two-dimensional synchronous correlation spectroscopy was used to analyze the sensitivity of DOM interaction between Cd²⁺and water.The complexation site and complexation order between Cd²⁺and DOM components were analyzed by two-dimensional asynchronous correlation spectroscopy.By participating in the ecological concrete slope protection project of Wanqin Canal in Xiangtan City,the role of ecological concrete in the protection of urban river slopes was three-dimensionally understood,and direction and understanding of the improvement of ecological concrete in the future have been achieved.