The Research On Application Of Activated Carbon In Deep Treatment Of Drinking Water

Water is a matter of human survival, economic development and social progress of the lifeline. Production and life of the people rely mainly on surfacewater and groundwater to provide water, as people over-exploitation of groundwater, leading to a sharp decline in water level, so a variety of surface water such as rivers and lakes, and reservoirs become the production and living water main source. As China's rapid economic development, industrialization and to accelerate the pace of urbanization, the increase in water consumption and water pollution, exacerbated by the shortage of freshwater resources. Surface water body was a large number of hazardous organic chemicals and pathogenic microbial contamination of conventional purification process can not eliminate these wide range of harmful organisms, treatment of drinking water is imperative.activated carbon of drinking water treatment, with its well-developed internal structure of the gap, giant of the large surface area and strong adsorption ability, and can greatly improve water quality and improve the water effects, make up for conventional water purification process and effectively to the problems In addition to trace organic micro-organisms. For activated carbon in drinking water treatment of choice of this research project, based on the principle of active carbon, activated carbon pore structure and adsorption properties of the structure and properties of activated carbon theory, the Huangpu River water as the research object, the depth of processing activated carbon effect study, by comparing the depth of six carbon adsorption effect of treatment of drinking water, the Huangpu River has been used for activated carbon treatment of drinking water, on this basis, but also the structure of activated carbon performance of their own research, by comparing the six carbon the size of the adsorption, surface area and pore size and pore volume, and further validate the Huangpu River drinking water treatment activated carbon adsorption, and get some important conclusions and results.1. As China's rapid economic development, especially in organic chemical industry, pharmaceutical industry, pesticides, insecticides and herbicides, such as the production of such rapid growth and development, making the number and variety of organic compounds in increasing the production of wastewater and a large number of standard treatment without sewage directly into the Huangpu River, on the Huangpu River water caused great pollution, led to sharp decline in drinking water sources, and conventional water purification process can not eliminate these wide range of harmful organisms.2. The internal pore structure of activated carbon developed specific surface area and adsorption performance, it is not only good adsorption of pesticides in drinking water, disinfection by-products and trace organic pollutants and other pollutants, but also can effectively remove the iron, manganese, copper, mercury, chromium, arsenic and other trace heavy metals. For drinking water treatment to improve water quality and improve well water effect, offset the problems conventional water purification process and the effective removal of trace organic micro-organisms.3. To the Huangpu River water as the research object, the depth of treatment of six selected for the static activated carbon adsorption and dynamic adsorption experiments, according to carbon samples measured values of iodine and methylene blue adsorption capacity, adsorption isotherm lines and the absorption rate to compare the adsorption of the carbon-like effect, that the iodine value of 3#,2#,5# and 1# are higher, whereas the value methylene blue of 3#,5#,1#and 2# are higher; the value of iodine and methylene blue of 5 activated carbon higher than other, but the slope of adsorption isotherm was also higher, more suitable for the removal of organic macromolecules, so the raw water in the tap water for the adsorption experiments capacity, water quality is poor compared to other activated carbon, and 2#,1# and 3# under the conditions of the experiment showed good adsorption; CODMn characterized by static adsorption capacity,1#,2# and 3# of activated carbon static adsorption capacity higher than the 4#,5# and 6# static adsorption capacity of activated carbon and the maximum static adsorption capacity is 2 #activated carbon; in the removal of organic matter on activated carbon, respectively, on the basis of the carbon samples CODMn, UV254, TOC removal rate of drawing out the number of days with the monitoring of the graphics, and graphics from their removal, and have learned that 2#,1# and 3# is at the forefront of carbon and 2# carbon is optimal, 4#,5# and 6# are less effective activated carbon and the worst is 5#; in the activated carbon obtained by monitoring ammonia, nitrite, after the removal of the experimental data, that a shorter running time due to dynamic experiments, activated carbon micro-organisms has not grow early, and activated carbon itself of ammonia, nitrite did not remove the ability of these two indicators can not see the merits of activated carbon; to stop the experiment after 40 days, re-launch the experiment, the removal ability of organic matter a certain degree of recovery, so the first day of the performance showed a relatively high removal rate, the higher removal rate of activated carbon are 2#,3#,1#, the removal rate in the next two days on average to 10 percent continuous decline, dropping by a large and rapidly penetrate, but every horizontal data, relatively speaking, the removal rate of 2# carbon is still higher than other carbon species; Although saturated activated carbon adsorption of organic compounds, the chlorine is still on a high removal rate.4. This paper innovatively on the Huangpu River drinking water treatment by activated carbon adsorption of activated carbon than the selected internal structure and properties were studied by using Tristar3000 auto analyzer sample of the carbon adsorption isotherms, specific surface area and pore size distribution, by comparison of the adsorption capacity of the charcoal samples, specific surface area and pore volume and pore diameter, the results from their own performance reflect the effect of carbon adsorption samples, that the relative pressure p/p0≈0.38, by the respective isotherm chart,we can see that the adsorption capacity corresponding to the size is 2#>1#>3#>4#>6#; in the relative pressure p/p0≈1, the adsorption reached saturation, by the respective adsorption isotherm adsorption corresponding figure can be learned that volume size is 2#>1#> 3#>4#> 6#; the adsorption isotherm has also been reflected in the level of development in the hole behind the adsorption ring width, and the order of the mesoporous carbon samples the level of development is 1#>4#>2#>3#> 6#; adsorption close to saturation when the size of the pore volume is 2#>1#> 3#>4#> 6#, the larger the pore volume is, the stronger the absorption capacity is; the oder of surface area carbon samples is 2# >1#>3#>4#>6#, specific surface area activated carbon adsorption capacity is characterized as a major indicator of surface area is larger, the stronger the adsorption capacity of activated carbon, the greater the adsorption capacity; in the pore size distribution graph, draw the kind of microporous carbon percentage:1#:52.50%; 2#:71.53%; 3#:67.74%; 4#:67.32%; 6#: 63.22%. we can see that 2# is the strongest adsorption capacity of carbon; 1# is the largest percentage of carbon in the hole, that hole in the more developed of them, which is the adsorption isotherm with hysteresis loop width of the agreement; obtained from the pore size distribution graph of the peak-like carbon at the corresponding pore volume, that the adsorption ability of 1#,2#,3 #and 4 #are higher, and 2# carbon is the highest, and 6# carbon is less, the aperture that the porous carbon-based samples, have contributed to the adsorption of small organic molecules. Through innovative experimental studies that used for treatment of drinking water on activated carbon used in the preparation and possibly to include more into the hole, the hole directly affect the level of development of organic carbon on the adsorption capacity and speed, and must To compare the effects of drinking water after activated carbon adsorption treatment, the internal structure of carbon samples analysis of the performance, fully reflect the activated carbon adsorption.