C30 coral aggregate concrete with chlorella control effect was prepared by adding nano-TiO_(2) and hydrophobic material,and the effects of nano-TiO_(2) and hydrophobic material on the basic properties of C30 coral agg...C30 coral aggregate concrete with chlorella control effect was prepared by adding nano-TiO_(2) and hydrophobic material,and the effects of nano-TiO_(2) and hydrophobic material on the basic properties of C30 coral aggregate concrete and chlorella control effect under different experimental conditions were compared.The experimental results show that nano-TiO_(2) and hydrophobic materials have a certain degree of influence on the basic properties of concrete,but the influence is not significant.Under long-term immersion,nano-TiO_(2) and hydrophobic materials can inhibit the growth of Chlorella vulgaris.The maximum fluorescence value of concrete is decreased by 53.6% after adding TiO_(2),and the maximum fluorescence value of concrete is prolonged by 20%(1 day).The maximum fluorescence value of concrete is decreased by 67.7% after adding hydrophobic materials,and the maximum fluorescence value of concrete is also prolonged by 20%(1 day);Under the condition of simulated tidal water,the inhibition effect of Nano-TiO_(2) on the growth degree and growth rate of Chlorella vulgaris is weakened,at this time the maximum fluorescence value of concrete mixed with nano-TiO_(2) is decreased by 50.5%,and the maximum fluorescence value is only prolonged by 14.3%;while the inhibition of hydrophobic materials on the growth degree and growth rate of Chlorella vulgaris is enhanced significantly,and the maximum fluorescence value of concrete with hydrophobic materials is decreased by 80.3%;the maximum fluorescence time is prolonged by 114.3%.展开更多
A Ag particle-coated and 1-dodecanethiolmodified melamine sponge(Ag-DDT-MS)was prepared through surface roughness by coating silver particles and subsequent grafting of a hydrophobic long hydrocarbon chain.Superhydrop...A Ag particle-coated and 1-dodecanethiolmodified melamine sponge(Ag-DDT-MS)was prepared through surface roughness by coating silver particles and subsequent grafting of a hydrophobic long hydrocarbon chain.Superhydrophobic and 3D porous Ag-DDT-MS was characterized by Fourier transform infrared spectroscopy,scanning electron microscope,energy-dispersive X-ray spectroscopy,and X-ray diffraction.The water contact angle of Ag-DDT-MS reached 159.2°.Ag-DDT-MS exhibited excellent absorption capacity for high viscous oils and organic solvents,ranging from 42.8 to 105.2 g∙g−1.The absorbed oils can be easily collected by the mechanical pressing process,and the oil recovery rate was satisfactory,more than 90%after 20 recycles.Ag-DDT-MS material also demonstrated good stability and excellent compressionrecovery ability,keeping 88.6%of the initial height after ten compression-release cycles.展开更多
基金Funded by the National Key R&D Program of China(No.2017YFB0309902)the Youth Fund of CABR Fund Project(No.20210122371030009)。
文摘C30 coral aggregate concrete with chlorella control effect was prepared by adding nano-TiO_(2) and hydrophobic material,and the effects of nano-TiO_(2) and hydrophobic material on the basic properties of C30 coral aggregate concrete and chlorella control effect under different experimental conditions were compared.The experimental results show that nano-TiO_(2) and hydrophobic materials have a certain degree of influence on the basic properties of concrete,but the influence is not significant.Under long-term immersion,nano-TiO_(2) and hydrophobic materials can inhibit the growth of Chlorella vulgaris.The maximum fluorescence value of concrete is decreased by 53.6% after adding TiO_(2),and the maximum fluorescence value of concrete is prolonged by 20%(1 day).The maximum fluorescence value of concrete is decreased by 67.7% after adding hydrophobic materials,and the maximum fluorescence value of concrete is also prolonged by 20%(1 day);Under the condition of simulated tidal water,the inhibition effect of Nano-TiO_(2) on the growth degree and growth rate of Chlorella vulgaris is weakened,at this time the maximum fluorescence value of concrete mixed with nano-TiO_(2) is decreased by 50.5%,and the maximum fluorescence value is only prolonged by 14.3%;while the inhibition of hydrophobic materials on the growth degree and growth rate of Chlorella vulgaris is enhanced significantly,and the maximum fluorescence value of concrete with hydrophobic materials is decreased by 80.3%;the maximum fluorescence time is prolonged by 114.3%.
基金The National Natural Science Foundation of China(Grant Nos.21777143 and 22078296)is appreciated as financial support.
文摘A Ag particle-coated and 1-dodecanethiolmodified melamine sponge(Ag-DDT-MS)was prepared through surface roughness by coating silver particles and subsequent grafting of a hydrophobic long hydrocarbon chain.Superhydrophobic and 3D porous Ag-DDT-MS was characterized by Fourier transform infrared spectroscopy,scanning electron microscope,energy-dispersive X-ray spectroscopy,and X-ray diffraction.The water contact angle of Ag-DDT-MS reached 159.2°.Ag-DDT-MS exhibited excellent absorption capacity for high viscous oils and organic solvents,ranging from 42.8 to 105.2 g∙g−1.The absorbed oils can be easily collected by the mechanical pressing process,and the oil recovery rate was satisfactory,more than 90%after 20 recycles.Ag-DDT-MS material also demonstrated good stability and excellent compressionrecovery ability,keeping 88.6%of the initial height after ten compression-release cycles.
