determination of activated carbon to join before and after the join in cigarette smoke volatile) base material, phenolic compounds, 5 kinds of volatile organic compounds (1, 3 butadiene and isoprene, acrylonitrile, benzene and toluene) and aroma composition to release a quantity to change, discusses the structure, the nature of the compound, activated carbon and filtration efficiency of flue gas composition. The results show that the activated carbon has a general filtering effect on flue gas compounds, but the filtering degree of different compounds is different. The filtration efficiency is mainly related to the specific surface area and micropore volume of activated carbon. When the particle size is certain, the filtration efficiency increases with the increase of specific surface area and micropore volume of activated carbon. When the specific surface area and micropore volume are close to each other, the smaller the carbon particle size is, the higher the filtration efficiency of flue gas components is. Microporous high percentage of carbon retention ability of small molecules, of acetaldehyde, 1, 3 - butadiene and isoprene small molecule compounds, such as high filtration efficiency, high percentage and microporous carbon mass transfer resistance is big, such as phenolic half less volatile components of filtering, appropriately increase large and medium hole and transitional channel will increase the filtering of macromolecular compounds. The filtration efficiency was related to the properties of the compounds, especially the molecular weight and boiling point of the compounds. The filtration efficiency of volatile carbon substrate and 5 volatile organic compounds increased with the increase of the boiling point of the molecular weight of compounds. The filtration efficiency of phenolic compounds was significantly lower than that of volatile compounds) and five volatile organic compounds, and the filtration efficiency of binary phenol was lower than that of monophenol. The filtration efficiency of aromatic compounds decreased with the increase of molecular weight boiling point.Urban sludge is a carbon material rich in organic matter. The preparation of activated carbon can not only solve the disposal problem of sludge, but also generate efficient and cheap adsorbent, which conforms to the scientific concept of circular economy and sustainable development.
In this paper, the sludge of the municipal sewage plant was used as raw material, and the activated carbon was prepared by chemical activation method, and the adsorption of lead and cadmium was studied with it, so as to realize the use of waste for waste control. The conclusions are as follows:(1) According to the relevant national standards, the sludge of Liede Sewage Treatment Plant is mainly composed of volatile organic compounds, with a volatile content of 64.86%, which can be used as the main raw material for the preparation of activated carbon.coconut shell granular activated carbon charcoal
chengde wanyang activated carbon factory
(2) Without adding additives to the sludge, the concentration of sulfuric acid and zinc chloride is 4 mol·L' and the volume ratio is 2:1. The activated carbon prepared has the maximum iodine adsorption value of 549.6 mg·g 'and the yield of 51.3%, which is the better carbon sample prepared by pure sludge and is recorded as SAC.(3) Adding 8% peanut shell, the iodine value of activated carbon of sludge reached 789.6mg · g', which was recorded as PAC