The catalytic performance of Cu46Zr47-xAl7Yx amorphous ribbons in the degradation of AO II dye wastewater

Environmental Science and Pollution Research - Metallic glasses (MGs) with unique disordered atomic stacking structures exhibit excellent catalytic performance in wastewater treatment. The...     

一种生物除臭方法及装置的研究

文章介绍了一种生物除臭的方法,这种方法是将装有碳质填料的反应包悬挂于好氧池中,反应包在好氧池中,历经曝气挂膜20~30天;就可以将装有碳质填料的反应包/或碳质填料放于生物除臭装置内;然后向生物除臭装置通入湿润的臭气,就可以将其生成水、二氧化碳、硫酸、硝酸和亚硝酸.使臭气被氧化,转化成无污染的物质,由于它的转化效率高,符合现代生产的高效性,因此一定会在生产实际中受到欢迎.     

复合膜生物反应器处理环氧氯丙烷废水

实验利用复合膜生物反应器处理以甘油为原料制备环氧氯丙烷产生的废水,考察了不同进水COD、水力停留时间以及盐度对处理能力的影响,并进行盐度冲击实验。生物处理后出水进行了深度处理的研究。结果表明:进水COD对处理能力影响较小;适当延长水力停留时间能优化出水水质;废水盐度高于22g/L时会对微生物产生抑制作用;深度处理能进一步降低出水COD;微生物通过一定时间的驯化期能适应并处理高盐度废水。     

Community structure and elevational diversity patterns of soil Acidobacteria

Acidobacteria is one of the most dominant and abundant phyla in soil,and was believed to have a wide range of metabolic and genetic functions. Relatively little is known about its community structure and elevational diversity patterns. We selected four elevation gradients from 1000 to 2800 m with typical vegetation types of the northern slope of Shennongjia Mountain in central China. The vegetation types were evergreen broadleaved forest,deciduous broadleaved forest,coniferous forest and sub-alpine shrubs. We analyzed the soil acidobacterial community composition,elevational patterns and the relationship between Acidobacteria subdivisions and soil enzyme activities by using the 16 S rRNA meta-sequencing technique and multivariate statistical analysis. The result found that 19 known subdivisions as well as an unclassified phylotype were presented in these forest sites,and Subdivision 6 has the highest number of detectable operational taxonomic units(OTUs). A significant single peak distribution pattern(P 0.05) between the OTU number and the elevation was observed. The Jaccard and Bray–Curtis index analysis showed that the soil Acidobacteria compositional similarity significantly decreased(P 0.01) with the increase in elevation distance. Mantel test analysis showed the most of the soil Acidobacteria subdivisions had the significant relationship(P 0.01) with different soil enzymes. Therefore,soil Acidobacteria may be involved in different ecosystem functions in global elemental cycles. Partial Mantel tests and CCA analysis showed that soil pH,soil temperature and plant diversity may be the key factors in shaping the soil Acidobacterial community structure.     

危化品企业安全生产标准化与其他管理体系的对比研究

分析了安全生产标准化与其他管理体系的关系,并结合当前推进安全生产标准化工作的具体要求,阐述了安全生产标准化的作用。     

Two-step harmless treatment of secondary aluminum dross (SAD) by vacuum distillation and alkaline roasting

Journal of Material Cycles and Waste Management - Secondary aluminum dross (SAD) is classified as hazardous waste by many countries in the world because it contains a large number of toxic and...     

Concentrations and accumulation rates of polychlorinated biphenyls in soil along an urban–rural gradient in Shanghai

Environmental Science and Pollution Research - This study proposed an in situ soil experimental system to quantify concentration and accumulation rates of polychlorinated biphenyl (PCB) congeners...     

活性炭纤维催化臭氧化降解苯酚及其对炭表面性能的影响

研究了活性炭纤维(ACF)存在下苯酚的臭氧化降解,以及臭氧化过程对炭表面的影响.结果表明:ACF存在下的臭氧化能够显著提高苯酚的分解和矿化,ACF的用量为1 g时.反应10 min后苯酚和COD的去除率分别为96.8%和88.4%,而活性炭在同样条件下对苯酚和COD的去除率仅分别为68.0%和63.6%;臭氧化后的ACF表面含氧官能团、比表面积和总孔体积都发生了变化,内酯基减少,羧基、羟基和羰基增多,表面更亲水;比表面积增加且主要集中在微孔,而微孔体积的减少表明较小孔径的微孔数量显著增多,同时出现极少量中孔和大孔.     

Economic dispatch of power system containing wind power and photovoltaic considering carbon trading and spare capacity variation

The drying up of the fossil energy sources and the damage from unchecked carbon emissions demand the development of low carbon economy, which promotes the development of new energy sources, such as wind power and photovoltaic. However, the direct connections of wind/photovoltaic power into power grid bring great impacts on power systems, thus affecting the security and stability of power system operations, which challenges the power system dispatching. In despite of many methods for power system dispatch, lack of the models, for power system containing wind power and photovoltaic considering carbon trading and spare capacity variation (PSCWPCCTSCV), restricts the further optimal operations of power systems. This paper studies the economic dispatch modeling problem of power system containing wind power and photovoltaic, establishes the model of economic dispatch of PSCWPCCTSCV. On this basis, adaptive immune genetic algorithm is applied to conduct the economic operation optimization, which can provide the optimal carbon trading price and the optimal power distribution coefficient. Finally, simulations based on the newly proposed models are made to illustrate the economic dispatch of PSCWPCCTSCV. The results show that optimization with the proposed model can not only weaken the volatility of the new energy effectively, but also reduce carbon emissions and reduce power generation costs.     

Octanol–air partition coefficients of polybrominated biphenyls

The octanol–air partition coefficients (K_OA) for PBB15, PBB26, PBB31, PBB49, PBB103 and PBB153 were determined as a function of temperature using a gas chromatographic retention time technique with 1,1,1-trichloro-2,2-bis (4-chlorophenyl) ethane (p,p′-DDT) as a reference substance. The internal energies of phase change from octanol to air (Δ_OAU) were calculated for the six compounds and were in the range from 74 to 116 kJ mol⁻¹. Simple regression equations of log K_OA versus relative retention times (RRTs) on gas chromatography (GC), and log K_OA versus molecular connectivity indexes (MCI) were obtained, for which the correlation coefficients (r²) were greater than 0.985 at 283.15 K and 298.15 K. Thus the K_OA values of the remaining PBBs can be predicted by using their RRTs and MCI according to these relationships.