鼠李糖脂胶团强化超滤处理含铅废水研究

以实验室配制的模拟含铅废水为研究对象,探讨了生物表面活性剂鼠李糖脂强化超滤技术对含铅废水的处理效果。实验结果表明,影响重金属离子铅去除率因素的主次顺序为:p H值鼠李糖脂浓度重金属离子铅的初始浓度操作压力,去除重金属铅离子的最佳条件是:鼠李糖脂浓度为8 CMC,p H值为9,操作压力为300 k Pa,最大去除率可达到89.66%。     

基于正交试验法的黄铁矿自燃倾向性影响因素分析

利用X衍射仪、X荧光分析仪对黄铁矿进行了成分分析,运用激光粒度仪对黄铁矿进行了粒径分析。以粒度、空气流量、质量为正交试验的3个因子,运用正交试验法设计实验。利用热分析仪对黄铁矿进行了升温氧化试验,得到5、10、15 K/min升温速率下的TG-DSC曲线。运用FWO等转化率法计算黄铁矿的活化能,并将其作为黄铁矿自燃倾向性评价指标。结果表明,三因素对黄铁矿自燃倾向性影响程度为:粒径空气流量质量,且粒径的大小与活化能的大小成比例关系;当粒径为131.10μm,质量为10 mg,空气流量为30 m L/min时,黄铁矿自燃倾向性最小。     

琅琊山风景区旅游商品开发

琅琊山作为著名旅游地，其旅游商品目前存在着产品单调、缺乏特色、品质不高等问题。通过对现有问题的分析，提出了琅琊山风景区旅游商品开发的原则，利用景区独特的自然资源与人文景观优势，从4个方面给出了旅游商品开发的对策，以提升景区的形象与品位，推动旅游业更好地发展。     

湖南省西线旅游资源及其开发方向

西线是湖南省旅游资源的富矿区，品位高，特色明显。文章客观分析了西线旅游资源的基本态势，提出了该地区旅游开发的基本方向。     

苏州旅游强市与旅游要素建设--从吃、住、行三要素说起

苏州要从旅游大市提升到旅游强市，必须强化旅游吃、住、行三要素建设。苏邦菜应借鉴成功经验，改良传统名菜，重建“吃在苏州”的格局。饭店既要满足基本接待需求，更要强化会议、商务功能，加快科技化、信息化、网络化建设，健全休闲娱乐功能。以提高苏州旅游接待业的总体水平和整体吸引力。为打开旅游交通这一瓶颈，应增加营运车辆，在线路安排和旅游集散中心建设上精心策划，调动民间资本参与旅游交通建设。     

我国城镇可持续发展实验区建设的理论与实践

可持续发展综合实验区是我国实施可持续发展战略的重要行动。本文在分析、总结我国城镇可持续发展实验区实践的基础上,提出了建设城镇可持续发展实验区的基本思路     

奥里油漂移扩散特性的实验及数值模拟研究

奥里油是我国目前大量进口的一种新型燃油,由大型油轮从委内瑞拉海运至中国湛江港口。文章以其在运输过程中可能发生的溢油事故为研究对象,对奥里油在水体中的漂移扩散过程进行了数值模拟以及相关实验。考虑到溢油扩散主要是受油品本身的性质(油类、油量、密度、黏度等)以及水流、风速的影响,文章尝试采用计算流体力学FLUENT软件中的VOF模型进行扩散模拟,以水槽溢油实验为模型建立基础,对三维无风速情况下进行气-油-水三相模拟,根据模拟得到的溢油扩散相图与实验所观察的溢油扩散轨迹比较可得出:FLUENT软件中的VOF模型能很好的模拟奥里油溢油扩散运动的情况,其结果与实验观察结果非常吻合。     

Relationship between near-surface morphological traits of familiar plants and their ability for sediment retention in a dry-hot valley北大核心CSCD

To explore the sediment interception capacity of plants and its relationship with the surface morphological traits of plants, we used laboratory simulations and off-site flume experiments to study the ability for sediment retention of six familiar species: Leucaena leucocephala (LL), Melia azedarach (MA), Dodonaea viscosa (DV), Coriaria sinica (CS), Heteropogon contortus (HC), and Eulaliopsis binata (EB) aver two growth periods in the dry-hot river valley of the Jinsha River. We analyzed the relationship between near-surface morphological traits of individuals of six species and their ability for sediment retention. Our study resulted in three main observations. (1) In the flume experiment, three-month seedlings and one-year old seedlings of the six species showed different abilities for sediment retention. In the three-month seedlings, the ability for sediment retention of CS was the highest, followed by MA and LL, whereas it was the lowest in HC and EB. However, in one-year old seedlings, the ability for sediment retention of CS was the highest, but the ability for sediment retention of HC and EB was better than those of MA and LL. Hence, the ability for sediment retention of the six species fluctuated between different growth periods. (2) The three-month old and one-year old seedlings of all six species showed different near-surface morphological traits. (3) The sediment mass was significantly and positively correlated with near-surface leaf areas, crown lengths, crown widths, stem dry matter densities at the intersection volume, and above-ground biomass, but significantly and negatively correlated with the angle between stem and ground, indicating that these latter are the main near-surface morphological traits able to affect sediment retention. In addition, the sediment mass was also correlated (positively and negatively) with the stem epidermal crack number, stem dry matter content, leaf dry matter content at the intersection volume, and dry mass per unit volume of the intersection volume, which could also reflect the ability of sediment retention. We conclude that in the areas where plant measures are used to control soil erosion and intercept sediment, the key, above-mentioned plant morphological factors should be taken into account in order to select the optimal plant species. © 2018 Science Press. All rights reserved.     

Immobilising of Cd,Pb, and Zn contaminated arable soils close to a former Pb/Zn smelter: a field study in Austria over 5 years

Numerous smelter sites are surrounded by rural land. The entrance of non-essential metals such as lead or cadmium into the food chain is very likely as well as phytotoxicity effects of zinc. Finding a realistic solution for these large-scale contaminations was one aim of this study. Previous results from pot experiments showed a high potential for the reduction of metals entering the food chain via crops grown on smelter-contaminated soils from Arnoldstein, Austria, by the use of amendments for immobilisation. A further aim was to optimise a field experiment for overcoming the gap between pot and field experiments and to look for long-term efficiency of the treatments [lime (CA), red mud (RM), gravel sludge + red mud (GS + RM)]. Field experiment results were obtained for 5 years. Besides soil and soil pore water samples, the following harvests were yielded: spring barley (Hordeum distichon ssp. L.) (2004–2005), narrowleaf plantain (Plantago lanceolata L.) (2006–2007) and velvet grass (Holcus lanatus L.) (2007–2008). The long-term efficiency of GS + RM led us to conclude that their application seems to be a realistic and practical measure for extensively contaminated land, best in combination with metal excluding cultivars.     

三次设计在合成氨装置甲醇洗工序减少H2S排放和增产CO2上的应用

对镇海炼油化工股份有限公司化肥厂民氨装置甲醇洗工序层气中Ｈ２Ｓ严重超标排放问题进行了分析。通过采用三次设计、优化生产,不但使Ｈ２Ｓ排放合格率达标,而且ＣＯ２产量也超过了原设计值。