Application And Study Of Functional Biomass Materials In Desalination And Adsorption Performance

Due to the lack of fresh water resources and the increasing problem of pollution,most of the current green pollution-free technologies?such as wind energy,solar energy,and carbon capture?are used to solve problems,such as water shortage and water pollution.The research of corresponding materials is becoming more and more important and urgent.With the improvement of science and technology,although the utilization rate of solar energy has increased,light conversion materials and adsorption materials still rely mainly on man-made materials.These materials need expensive costs and complex manufacturing processes,which limit the use of many areas.At present,biomass materials have structural advantages and stability of properties,environmental protection,great light conversion and adsorption efficiency,and low-cost,so biomass materials have attracted a lot of attention and research.Although the advantages of biomass materials are very suitable for preliminary exploration,due to the external conditions,the exploration of biomass materials has encountered some obstacles.In our research,on the one hand,we study several common biomass materials,and directly treat them as light conversion materials through heat treatment and modification,and place them on the designed solar water evaporation device.Finally,the purpose of enhancing the heat absorption efficiency is achieved.On the other hand,we use the inherent structure and properties of these biomass materials to test its adsorption performance for large ions,organic solvents,etc.After heat treatment for biomass materials,and put it in solar water evaporation devices to achieve the purpose of water evaporation purification.Finally,the water purification is performed while achieving high adsorption performance,the specific research content and main results of this article are as follows:Firstly,a heat-absorbing biomass material with high absorption of sunlight are prepared through a facile and effective heat treatment method,and the solar water evaporation devices are designed,which is based on heat-absorbing material to achieve seawater desalination and adsorption performance.As a heat absorbing material,the light absorption rate is significantly enhanced,and the maximum solar water evaporation efficiency of the device can be greatly improved,and up to 3.92 kgm^-2h^-1,which is about 3 times higher than that of direct solar water evaporation under the same condition.In addition,the water evaporation device,which is based on the heated biomass material,has significantly improved seawater desalination and adsorption capacity,which based on the test results.Secondly,the biomass material can not only significantly improve the heat absorption efficiency after simple heat treatment,but also can be used as a water supply path due to the structural characteristics of the biomass material.In order to further reduce heat loss,solar evaporation efficiency can be enhanced by compounding other insulation materials.In addition,different composite ratios of biomass materials and thermal insulation materials will cause different increases in the heat absorption efficiency of water evaporation devices.The optimal ratio is selected for solar water evaporation testing to achieve the goal of seawater desalination and adsorption.Through the performance test of the solar water evaporation device based on the heat-treated biomass material,its evaporation and desalination efficiency and adsorption performance have been improved,which proves the availability of this kind of biomass material.Therefore,this idea also opens up new road for the application of other similar structures of biomass or biomass composites.