Abstract: With the rapid development of new energy, lithium batteries, as one of the key technologies in the field of energy storage, play an important role. However, with the widespread application of lithium batteries, the problem of their disposal has become increasingly prominent, which not only affects the environment but also wastes precious resources. This article analyzes the domestic new energy lithium battery market situation and finds that domestic new energy is developing rapidly and the lithium battery market has huge potential. In terms of lithium battery recycling and utilization, comparison shows that foreign lithium battery recycling technology is relatively mature, but there are certain challenges in adapting to domestic actual conditions and cost control. Although there are some advanced recycling technologies in China, the overall level still needs to be improved. Read More

Abstract: With the continuous development and progress of science and technology and society, the relationship between education and environmental protection is increasingly close, and people's attitude towards pollution is more and more serious, away from the formalism. We have the responsibility and obligation to implement this important measure of environmental awareness in chemistry teaching. Therefore, in this paper, the existing problems and pollution sources of organic chemistry experiments, the necessity and measures to achieve environmental chemistry are described. Read More

Abstract: Oil-based cuttings from a shale gas well were studied. The effect of reaction temperature and holding time on curing effect of Ba element in oil-based cuttings by heat treatment method. The experimental results show that the addition of NaOH can effectively solidify Ba element in oil-based cuttings during heat treatment. At the same time, with the increase of reaction temperature, the increase of the proportion of NaOH and the increase of holding time, the leaching amount of Ba was lower and lower. Read More

Abstract: In this study, a new type of dithiocarbamate (DTCs) heavy metal chelating agent MF-DTC was prepared by carbon disulfide modified melamine formaldehyde resin prepolymer, and the structure of the chelating agent and chelating products was characterized by infrared, ultraviolet, elemental analysis, thermogravimetry, scanning electron microscopy and other means: the process of chelating agent Cu was studied, and the results showed that MF-DTC chelating agent had a higher adsorption capacity, and compared with the traditional chelating agent SDD and Na2S, it had higher chelating capacity under acidic conditions, it can be directly used to treat heavy metals in acidic wastewater. Moreover, the environmental stability of heavy metals after chelation is high. Heavy metals are not easy to be leached again after treatment. Read More

Abstract: The mine application of construction waste permeability filling body is an effective way to avoid the collapse of overlying rock strata caused by coal mining, to solve the questions of surface resource occupation and pollute the ecological environment, and to promote regional hydrogeological balance. Based on the infiltration test on twelve groups of non-cemented and cemented samples with different particle size ratio, the variation characteristics of permeability coefficient of non-cemented and cemented construction waste samples with different fine content and cement were analyzed. The porosity of non-cemented samples and cemented ones was obtained, the relationships of fine content and porosity, permeability coefficient were analyzed, the relationships of fractal dimension and porosity, permeability coefficient on non-cemented samples and cemented ones were discussed. The results showed that fine content was negatively correlated to the permeability coefficient of non-cemented samples and non-cemented ones. The porosity decreased with fine content increasing, the porosity of non-cemented samples ranged from 5.007~7.029%, and the one of cemented samples was 3.230~6.508%. Fractal dimension of non-cemented samples and cemented ones were fine aggregate> medium coarse aggregate> coarse aggregate, and the fractal dimension of non-cemented samples was less than the cemented ones, the porosity and the mass fractal dimension could well represent the relationship between the permeability and fine content. Read More