The requirement of the times of urban stock renewal puts forward the proposition of improving the quality of urban construction engineering and developing a livable environment within the limited urban space. With the large output of construction engineering waste and the large space occupied, construction engineering waste must be developed toward the direction of resourceful reuse under the background of stock renewal. This paper takes the urban construction requirements under the stock renewal as the entry point, reflects on the current situation of construction engineering waste treatment in China, and proposes the reuse mode of building materials, ecology and energy of construction engineering waste under the background of stock renewal to help the sustainable development of urban intensification.
Soil petroleum hydrocarbon pollution is a serious environmental problem facing the world, posing a massive threat to human health and ecological environment security. This study used two common materials in daily life (the peat and the mussel shell) as soil conditioners to remediate petroleum hydrocarbon-contaminated soil. During the 300-day test period, the performance of soil microorganisms was measured by total soil heterotrophic bacteria and petroleum hydrocarbon-degrading bacteria, and the degradation of soil TPH was examined. The results showed that the mixed addition of the crushed mussel shell (CMS) and peat could significantly promote the degradation of petroleum hydrocarbons in soil. This may result from a combination of physicochemical and microbial interactions between the modifier and the petroleum hydrocarbon. Peat provides rich nutrients for soil microorganisms. The addition of peat as a soil amendment significantly enhanced the activity of soil microorganisms. The promotion of soil petroleum hydrocarbon degradation by CMS was slightly weaker. Different concentrations of TPH-contaminated soil had different responses to amendments. In conclusion, the promotion effect of peat on soil petroleum hydrocarbon degradation is more significant than that of CMS, and peat is a modifier that can be considered for soil petroleum hydrocarbon remediation.
Tight reservoirs in some blocks of the Mesozoic in the Ordos Basin use classical Archie formulas to explain oil saturation with lower accuracy. This paper proposes new ideas and methods for interpretation of tight oil saturation base on CHANG 6 similar to 7 tight reservoirs in Zhengning-Heshui block of Ordos Basin, China. There are magnitude differences in resistivity of rocks, crude oil, and formation water in reservoirs. On the basis of still following the theory of Archie's rock electricity experiment, the relationship between the water porosity and the resistivity of the reservoir with or without oil is discussed. By discerning the relationship between the water-bearing porosity and resistivity in the pure water layer, pure oil layer, and oil-water layer, the interpretation chart of formation resistivity and water-bearing porosity was established. Interpretation of oil saturation in tight reservoir is achieved by analyzing two parameters of porosity and water-bearing porosity. The interpretation results are basically consistent with the results of tight oil test in Zhengning-Heshui block. The study also discusses the differences of research ideas between new method and the classic Archie formula. It is considered that this method has certain advantages by comparing with Archie's formula in terms of interpretation results, deviation margin, deviation source, implementation conditions, technical and economic requirements, and conditions of application. The research also provides insights into interpretation errors and how to deal with them. The shortcomings of new method was discussed objectively, which provides an analysis basis for the further research and improvement for the new method.
Tomato leafminer Tuta absoluta (Meyrick) is one of the most important pests that cause yield and quality loss in tomato cultivation in greenhouse and open field. 7'. absoluta, has spread rapidly in tomato production areas after emerging to Turkey in 2009. The pest is widely found along growing season in greenhouses and open fields in the coastal part of Antalya, where suitable climatic conditions are present. However, the population status of T. absoluta in tomato cultivation in greenhouses under high altitude highland conditions is not known and the study has been handled for this purpose. this study were conducted in 2018-2019 in Elmali and Korkuteli districts of Antalya province. In the study the population density of immature stage of T. absoluta were determined by leaf sampling and adult population density were determined by using pheromone traps for two years at four different locations. In addition, the natural enemies of the pest were also determined. As a result of the study, the pest was found widespread throughout the season in tomato greenhouses under highland conditions. Bracon concolorans Marshall, 1900, (Hymenoptera:Braconidae) Bracon variegator Spinola, 1808 (Hymenoptera:Braconidae) and Nesidiocoris tenuis (Reuter, 1895) (Hemiptera:Miridae) have been identified as natural enemies. As for parasitoid of T. absoluta, B. variegator was determined as the first time in Turkey with present study.
Soft rock and sand are interspersed in the Mu Us Sandy Land, and the land degradation is severe. Using soft rock and sand as resources on the spot is of great significance to promote the environmental construction and human settlement structure of the area. In this paper, the soft rock and sand are mixed according to the volume ratio of 0:1 (CK), 1:5 (51), 1:2 (S2) and 1:1 (S3) to construct a soil plow layer. And based on the 0 similar to 30 cm soil layer, the mineralization of soil organic carbon was studied. The results show that as the proportion of soft rock increases, the organic carbon content of the 10-20 cm soil layer gradually decreases. With the increase of the soil layer, the soil organic carbon mineralization rate and cumulative mineralization amount are the highest in the 10 similar to 20 cm soil layer, followed by 0 similar to 10 cm and 20 similar to 30 cm. With the extension of the cultivation time, the mineralization intensity showed a trend of first decreasing, then increasing and finally decreasing steadily. At the end of the cultivation, the organic carbon mineralization rate of the compound soil was between 3.10 similar to 10.47mg/(kg.d(-1)). The cumulative mineralization rate of soil organic carbon in each soil layer has different performances. The average value is the lowest at 0 similar to 10 cm, which is 20.54%, and its value increases with the increase of arsenic content. The change trend of the potential mineralizable organic carbon content is consistent with the cumulative mineralization amount. The mineralization amount treated with S1 and S2 is relatively small, and the half-turnover period is opposite to the change trend of the mineralization rate constant. The difference was significant only in the 0 similar to 10 cm soil layer in the half turnover period, and the treatment of adding arsenic sandstone was significantly higher than that of CK treatment. In conclusion, the organic carbon in the 0 similar to 10 cm soil layer is relatively stable and still in the process of soil formation and development, and the carbon sequestration ability is stronger when the ratio of arsenic sandstone to sand reclamation is between 1:5 and 1:2.
