Multiwalled carbon nanotubes (MWCNTs) were modified by oxidation and acidification with concentrated HNO3 and H2SO4, and the modified multiwalled carbon nanotubes (M-MWCNTs) and raw MWCNTs were characterized by several analytical techniques. Then the demanganization effects of MWCNTs and M-MWCNTs were well investigated and elucidated. The experimental data demonstrated that the adsorption efficiency of Mn(II) could be greatly promoted by M-MWCNTs from about 20% to 75%, and the optimal adsorption time was 6 h and the optimal pH was 6. The results of the kinetic model studies showed that Mn(II) removal by M-MWCNTs followed the pseudo-second-order model. Isothermal studies were conducted and the results demonstrated that the experimental data fitted well with the three models. The reliability of the experimental results was well verified by PSO–BP simulation, and the present conclusion could be used as a condition for further simulation. The research results provide a potential technology for promoting the removal of manganese from wastewater; at the same time, the application of various mathematical models also provides more scientific ideas for the research of the mechanism of adsorption of heavy metals by nanomaterials.
Cigarette processing and production process is essentially a production and implementation process, which has little difference with other production enterprises. With the deepening and development of information construction, the introduction of MES system makes the digitalization of new cigarette processing and production process further integrated and refined. The original production units have been scientifically organized through MES. But with the country’s encouragement of intelligent manufacturing and the stimulation of domestic and international environment, intelligent information technology has been put on the agenda. Different from MES, intelligent informatization pays more attention to production intelligence, big data application and Internet of things. Based on the information system constructed by MES, intelligent technology will make the cigarette processing and production process more efficient, and will directly bring value to cigarette enterprises.
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