Synthesis Of The CuO Nanoparticle Desulfurizor And The Preformance Research For Odor Control In WWTP

Recent years, the flourish of Waster Water Treatment Plant (WWTP) do great contribution for the reform of the water resource environment, but the byproduct of the WWTP gives out ordor problem. In many teche of the process, a great deal of ordor brings out into the environment without any disposal. To solve the ordor pollution in the process of WWTP is a pressure task. H2S is the representation matter in the ordors and it is widely distributing and highly jeopardous. It needs to be disposal in the point of view of no matter in the field of security, environment protection and economy. According to the characteristic of the pollution by H2S, it is practical significant to develop the highly precision and activity desulfurizor at the ambient temperature.CuO is a branch of dry method desulfurizor, but the researchers are focused on the desulfurization at middle and hot temperature. The research on desulfurization at ambient temperature is vey lack.The former researchers have discovered that the decrease of the grain size can improve the reaction constant, and reduce the reaction qualification. Among the many kinds of produce processes, the direct deposition method was chose as the technics. We improved the conventional method of precipitation by addition of disperant, studied and optimized the factors. The symmetrical CuO nanoparticle of 6.20nm in grain size with good dispersion was obtained.The desulfurizaion tests were carried out at ambient temperature. The influence factors for desulfurization such as space velocity of H2S, the reaction temperature were studied. The performance of CuO nanoparticle produced by different methods or different grain sizes was compared. The result shows out the direct deposition method may have the bigger advantage. The nanoparticle with smaller grain size tends to be more efficiency at the ambient temperature. At the condition of smaller space velocity, room temperature the CuO nanoparticle can achive the excellent effect in the disposal of high H2S concentration. We found that the performance such as desulfurization precision, active time and sulfur capacity is preceding the commercial desulfurizaion sorbent recently used at the ambient temperature. The XRD, XPS, TG-DTA, TEM techniques was adopted for the analyzing of the CuO nanoparticle and the outcome after the desulfurization. We found that there are many lack of O in the crystal matrix in the small size of CuO nanoparticle and this may lead to the good performance of the desulfurization. The sulfur phase was formed in the component analysis of the outcome. This is the new way for the callback of the S element.The analyse of the elements chymistry state was carried on and the mechanism of desulfurization at normal temperature was discussed. The desulfurization process may go through the absorption, combine with the Cu2+, electron transfer. This new kind of desulfurizor has the different mechanism with the desulfurization carried out at the hot temperature. The study implies the great future of application, deriving the theory basis for the CuO based desulfurizor.