Dawson结构磷钨钒杂多酸的表征及其光催化性能

通过FTIR、UV、循环伏安法对自制的Dawson结构磷钨钒杂多酸催化剂的结构及电化学性能进行表征.以甲基橙溶液模拟工业染料废水,考察了磷钨钒杂多酸光催化降解性能的影响因素.实验结果表明:自制磷钨钒杂多酸具有Dawson结构,表现出良好的电化学性能;在磷钨钒杂多酸加入量为1.5 g/L、初始甲基橙质量浓度为10 mg/L、紫外灯功率为500W的条件下,经紫外光照射200 min,甲基橙降解率可达98.3％.     

SBR法处理麻生物脱胶废水

利用 SBR工艺处理麻生物脱胶废水 ,对 CODcr、NH3-N的降解、SBR厌氧段和处理后水是否可回用进行了研究。实验结果证明 ,当进水 CODcr 15 0 0 mg/ L左右 ,MLSS的 CODcr负荷≤ 0 .74kg/ kg· d时 ,废水各项指标均可以达到 GB8978-1996苎麻脱胶废水综合排放二级标准 ,且可回用脱胶     

可持续发展与产业结构优化

可持续发展要求产业结构合理化、高度化、形成能够发挥资源禀赋比较优势的产业结构和发展环保产业,但是我国目前存在产业结构不合理、重复建设严重、地区产业结构趋同、产业技术水平低、第三产业发展不足、高新技术产业和环保产业发展滞后等情况,极不利于社会经济的可持续发展。为了真正的实现可持续发展,必须努力调整产业结构,淘汰落后过剩的生产能力,促进产业结构升级,大力发展第三产业、环保产业和高新技术产业。     

Changes in the Carabid Fauna (Coleoptera, Carabidae) of Meadow Steppes during the Past Decades

Basic trends in the structural dynamics of the meadow-steppe carabid fauna over the period from 1970 to 1997 have been analyzed. Data on changes in the abundance and composition of dominant species are reported. Transformation of carabidocenoses is mainly accounted for by an increased humidity of the climate and the related mesophytization of forest–steppe ecosystems.     

Specific Structural Features of Zooplankton in Lakes Differing in Trophic Status: Zoosynusiae

Russian Journal of Ecology -     

复垦红壤中牧草根际微生物群落功能多样性

通过盆栽试验研究了浙江省诸暨铜矿区复垦红壤牧草根际微生物生物量及群落功能多样性的变化.结果表明,种植不同牧草使矿区土壤根际微生物生物量碳发生了显著的变化,其影响大小因矿区土壤污染程度而异.无污染和轻度污染土壤根际微生物生物量碳变化表现为黑麦草+三叶草>三叶草>黑麦草>未种植土壤,处理间差异均达显著水平(P<0.05),重度污染环境下各处理间差异不明显.Biolog数据分析显示,种植不同牧草的矿区土壤根际微生物群落结构和功能多样性也发生了相应改变,根际土壤微生物群落代谢剖面(AWCD)均显著高于未种植牧草土壤,处理间差异达极显著水平(P<0.001).典型变量分析揭示了不同牧草根际微生物群落利用碳源种类和数量存在明显差异.     

内分泌扰乱化学品活性筛选和测试方法

对近年来对内分泌扰乱化学品(EDCs)的筛选和测试方法进行了述评。目前倾向于采用包括与激素受体结合的亲和力测试、体外和活体测试在内的层式检测法对EDCs的活性进行筛选和测试,并评价人体和野生动物内分泌扰乱的性质、可能性和剂量-反应关系。目前也致力于EDCs的结构-效应关系特别是定量关系的研究,旨在提供一种简便低廉的筛选方法。总的说来,稳定可靠的标准化筛选和检测方法的建立仍待努力。      

区域旅游业内部结构的动态关系与优化对策——以赤壁市千岛湖风景区为例

旅游市场的变化可作为触发因子推动区域旅游业内部结构处于动态变化之中。对于特定的风景资源结构,一定的旅游市场结构要求一定的旅游接待服务结构与之相适应,才能产生与之相适应的旅游行为层次获得最佳经济效益。基于此,通过建立区域旅游业内部结构的对应变换关系模式,可对风景旅游区进行“诊断”,并提出治理方案和发展规划。     

Polymer Mineralization in Soils: Effects of Cold Storage on Microbial Populations and Biodegradation Potential

Soil retrieval, processing and storage procedures can have a profound effect on soil microorganisms. In particular, changes in soil microbial populations may adversely affect the biological activity of a soil and drastically alter the soil's potential to mineralize added substrates. The effects of cold storage on the biodegradation of a series of test polymers was investigated using two soils—a synthetic soil mix (SM-L8) and a field soil (Bridgehampton silt loam) from Rhode Island (RI-1). Biodegradation tests were conducted using freshly prepared/collected soil and again following storage at 4°C for 3 to 8 months. Prior to each biodegradation test, the soils were incubated at 60% water-holding capacity (WHC) and 25°C to rejuvenate the microbial populations; the soils were incubated for periods of 48 h (freshly collected soil) or 25 days (soils stored at 4°C). Soil microbial populations were assessed by enumerating different segments of the population on agar plates containing different selective media. Mineralization of the test polymers (cellulose, poly-3-hydroxybutyrate, and starch acetate, d.s. 1.5) was monitored using standard respirometric techniques. Our results demonstrated that cold storage had a generally negative effect on the soil microbial populations themselves but that its effect on the capacity of the soil microorganisms to degrade the test polymers varied between soils and polymer type. Whereas cold storage resulted in dramatic shifts in the community structure of the soil microbial populations, substantial restoration of these populations was possible by first conditioning the soils at 60% WHC and ambient temperatures for 25 days. Likewise, although the effects of cold storage on polymer mineralization varied with the test polymer and soil, these effects could be largely offset by including an initial 25-day stabilization period in the test.     

我矿童家院区通风系统的改造与评价

介绍了锡矿山矿务局北矿童家院区北风井通风系统建立的过程,对北风井通风系统投产运行的实际效果进行了评价.