0D/3D direct Z-scheme heterojunctions hybridizing by MoS2 quantum dots and honeycomb conjugated triazine polymers (CTPs) for enhanced photocatalytic performance

Herein, a novel direct Z-scheme photocatalyst was accomplished by hybridization of 0D MoS₂ quantum dots (MSQDs) and 3D honeycomb-like conjugated triazine polymers (CTP) (namely, CTP-MSQD). The unique 0D/3D hierarchical structure significantly enhanced the exposure of active sites and light harvesting property, while the formed p-n junction enabled the direct strong interface coupling without the necessity of any mediators. The optimized CTP-MSQD3 exhibited continuously increased visible-light-driven photocatalytic activity and strong durability both in Cr(VI) reduction and H₂ evolution, featured a rate of 0.069 min⁻¹ and 1070 µmol/(hr∙g), respectively, which were 8 times than those of pure 3D-CTP (0.009 min⁻¹ and 129 µmol/(hr∙g)). We believe that this work provides a promising photocatalyst system that combines a 0D/3D hierarchical structure and a Z-scheme charge flow for efficient and stable photocatalytic conversion.     

氧瓶燃烧法与冷原子吸光光度法测定煤中痕量汞

本文介绍了以氧瓶燃烧法处理煤样,氯化亚锡还原汞离子,用冷原子吸收法测定汞的含量。同时,对氧瓶燃烧法处理煤样的可靠性进行了考察。     

中国海滨旅游地气候适宜性评价

选定我国２５个滨海城市和１２个岛屿共计３７个测站的四项指标（气温、风速、相对湿度、日照时数的多年月平均值）３０多个系列年资料，对海滨城市和近岸岛屿的气候进行了系统分析。研究发现，我国的渤海湾沿岸海滨城市和海南南部城市有长达４～６个月的度假和休疗养的气候条件，它们在季节上有着较强的互补性，相比之下，其他海滨城市适宜旅游季节不长，且分成春、秋两个时段，综合条件不太理想。     

某排污扩散器水力特性的实验研究

对某实际排污工程多喷头扩散器的水力特性进行了系统的实验研究。内容包括：在不同污水排放是、环境流速和潮位情况下，扩散器各喷头的流量分配，喷口流速分布；扩散器管路的冲洗，水流阻力特性等；以及扩散器近区稀释特性分析，结论对实际排污系统设计有一定的参考价值。     

Water quality assessment through hydrodynamics and transport simulation in the S. Gilla lagoon, Italy

The paper describes the study of the hydrodynamic and transport features of the S. Gilla lagoon in Sardinia, Italy. The study, aimed at assessing the environmental quality of the water body, involved extensive use of numerical models based on the shallow water equations, thus enabling to simulate a number of different situations of practical interest. Based on field data, six meteorological and hydrologic patterns were recognised which were assumed as representative of the various conditions occurring in the four seasons. Typical winter conditions proved effective for the water refreshment, while the other seasonal patterns induced a stronger internal mixing. Thus, unfavourable salinity distributions with respect to the fish farm activities, which are carried out in the water body, were obtained with the winter pattern, whereas, on the other hand, a higher dilution of pollutants discharged by the river inflows was achieved. In general, between dominant winds, southeast winds proved more effective in forcing internal mixing than northwest winds. Two flood events with quite different return periods were also simulated, in order to estimate the extent of the inundated areas and the salinity depletion. The consequent salinity recovery was simulated both in natural conditions and with the discharge of salt sea water into the lagoon to accelerate the salinity re‐equilibrium. This revised version was published online in August 2006 with corrections to the Cover Date.     

一种新型电除尘器的半工业性试验

论述小断面六角形通道电除尘器的结构特点及其半工业性试验结果.     

Turning waste to wealth-biodegradable plastics polyhydroxyalkanoates from palm oil mill effluent – a Malaysian perspective

Palm oil industries have been contributing significantly towards the country’s economy and increase standard of living among Malaysians. However, it has also been identified as the major contributor for discharging the largest pollution load throughout the country. Owing to high biochemical oxygen demand (BOD) and chemical oxygen demand (COD), the palm oil mill effluent (POME) cannot be discharged directly into the environment. Thus, palm oil industries are facing tremendous challenges in order to comply with environmental regulations. While anaerobic digestion has been employed by most mills as primary treatment, POME can also be a potential source of degradable organic material which can be converted into value-added products and fine chemicals. Organic acids generated during acid-phase anaerobic digestion of POME could be a potential carbon source for the production of polyhydroxyalkanoates (PHA)- a biodegradable thermoplastic material of microbial origin. This paper aims at understanding how organic acids from POME may serve as a renewable feedstock for the biosynthesis of PHA.     

安徽省土地利用现状及趋势分析

1980～1999年的20年间，安徽人口增长了1313万，耕地面积却减少了20万hm^2，森林面积略有增加，人均耕地和资源面积持续下降，这种趋势若得不到控制，将影响我省土地的可地续利用，必须依靠农业科学技术，提高耕地生产率，以及继续控制人口增长，来抵消土地利用变化所带来的压力。