|
Bone charcoal and bamboo shavings, clay composite, an inexpensive Fluor prepared by carbonization activation - carbon ceramic fluoride removal adsorbent material. Carbon ceramic fluoride removal adsorbent material Preparation and Adsorption characteristics, its structure and porosity and specific surface area analyzer (BET), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy the scanner (FTIR) test methods were characterized, and explore the the carbon fluoride removal adsorbent material Tao fluoride removal mechanism. Through research in the process of preparing a fluorine adsorption of carbon-ceramic material, the choice of materials, the proportion of raw materials, heating rate, the activation temperature and holding time for fluoride removal performance obtained optimum process of preparing carbon ceramic fluoride removal adsorbent material for the : bentonite, bone charcoal and bamboo shavings ratio of 1:2:1, and a heating rate of 5 ° C / min, the activation temperature of 600 ° C, holding time for one hour. At this point, carbon ceramic fluoride removal adsorbent material fluoride removal capacity of 2.214mg / g fluoride removal rate of 88.56%. The effect of fluoride removal, carbon ceramic fluoride removal adsorbent material bentonite, bone charcoal and charcoal fluoride removal better. This shows that the carbon-ceramic fluoride removal adsorbent material in the fluoride removal process, a synergistic effect, enhance the effect of fluoride removal. By static and dynamic assay shows the pH = 6 to 8, adsorption time 3h, adsorption temperature 20 ~ 30 ℃, the optimum fluoride removal conditions. When the raw water concentration of less than 5mg / L, and select the appropriate amount of adsorbent, the adsorption of fluoride ion concentration of less than 1 mg / L, to reach the national drinking water standard. In other conditions in certain circumstances, the higher the filter layer, the slower the flow rate, and lower concentration of the raw water, the longer the effective operation of the system, the greater the source water multiples. However, the flow rate is too slow may affect processing efficiency. Determination of the the carbon fluoride removal pottery adsorption material, bone charcoal, bamboo charcoal and clay specific surface area and pore volume and pore size distribution analysis, charcoal Tao fluoride removal adsorbent material in optimum conditions specific surface area than the bone char, charcoal and clay, and the dominant hole. Its specific surface area of ??326.66m2 / g, a pore volume of 0.5057cm3 / g. This shows that bone meal, bamboo shavings, and clay is not a mechanical mixing together, but in the process of carbonization and activation of the interaction between the three, prompting more developed carbon ceramic fluoride removal of the pore structure of the adsorbent material. By scanning electron microscopy shows that bone char and carbon ceramic fluoride removal adsorbent material, clay and bone charcoal, in the process of activation of the calcined, preferably an organic combination. This is mainly because clay and bone charcoal is also formed in the activation process of calcination in a lot of large holes, holes and micropores, wherein the macropores can play the role of the channel so that the pore structure of the composites charcoal [0] causing blockage and damage, mesoporous and microporous has good adsorption, adsorption material makes carbon ceramic fluoride removal increased specific surface area, pore structure tends to be developed to further increase the fluoride ion adsorption. Fourier transform infrared spectroscopy by the adsorbent material of carbon ceramic fluoride removal scan analysis, the activation temperature and holding time to impact of surface functional groups on carbon Tao fluoride removal adsorbent and its composition. The higher the activation temperature, the more favorable the formation of the Si-H bond in the bone carbon the PH bond or clay; longer the holding time, the activation is more fully, the formation of CO bond more, these measures increase the material the fluoride removal effect since a positive role.
|