我国工程环境监理的发展态势及建议

工程环境监理在我国刚刚起步,是一种新型的环境管理方式.文章结合工程环境监理工作实践,总结我国现阶段的工程环境监理,从内容、目标、对象、依据等方面对比分析了工程环境监理与工程监理、环境评价的关系,并提出建议,为工程环境监理的发展提供参考.     

微波协同氧化预处理垃圾渗滤液NF膜滤浓缩液研究

针对城市生活垃圾填埋场垃圾渗滤液NF膜处理后产生的浓缩液处理难问题,采用微波协同氧化技术对其进行预处理,探讨了pH值、预反应时间、药剂用量、微波反应时间等因素对浓缩液CODcr及色度去除率的影响.结果表明:当pH=4,预反应时间60 min,药剂用量1g/l、微波反应时间3 min时,CODcr、色度的去除率分别为71.2%,80%.预处理后的出水CODcr及色度指标达到垃圾渗滤液现有生化处理系统的进水要求.     

安徽黟县西坑银多金属矿成矿地质条件研究

本文介绍了安徽黟县西坑银多金属矿床的构造地质、地层与蚀变、岩浆作用、银矿体与矿石及同位素等特征,探讨了矿床形成的地质条件。     

航空运输安全水平评价问题研究

本文针对目前航空运输安全水平评价存在的问题及现实意义,对安全与安全水平的概念进行了深入的辨析,研究了安全性与安全水平之间的关系,提出了安全水平的客观衡量标准;在此基础上,结合航空运输的生产实际,建立了航空运输安全水平评价指标,并通过实证研究论证了关于安全水平评价的理论分析,研究了航空运输安全水平提升的特征,并对中美两国...     

江苏省宿迁市某监测井地下水砷超标原因研究

江苏宿迁市中部某远离工业企业的监测井地下水砷（As）指标连续多期次超《地下水质量标准》（GB/T 14848—2017）Ⅳ类标准限值。为探究该监测井地下水As长期超标原因,通过在监测井附近新钻取岩芯沉积物中不同形态As的提取实验,结合新井和监测井中地下水的同步取样与水质参数的测试,系统分析了监测井点位地下水As超标的原因。研究结果发现,离监测井5 m处的新井地下水As质量浓度不超标,而监测井中As仍超标。对比新井和监测井的水质参数与沉积物中As的赋存形态发现,在还原性和弱碱性的环境条件下,地下水类型及地层沉积物中碳酸盐结合态的变化可能对地下水As质量分数有明显的影响,而铁-锰氧化物结合态与有机物-硫化物结合态的变化对As质量分数超标影响则有限。此外,不排除可能受到成井工艺不规范与监测井受到串层污染的影响。     

城市污泥堆肥用作草坪基质研究进展

针对城市污泥堆肥特点,阐述了国内外城市污泥堆肥用作草坪基质的研究现状。总结了污泥堆肥用于草坪生产存在的问题,并认为研究重点应放在污泥堆肥混合基质的组成、水肥管理技术、草种的筛选、规范堆肥生产和草坪质量综合评价标准及可能存在的环境问题等方面。另外,需要加大高新技术的投入促进产业化,以便为污泥堆肥用作草坪基质提供确实的理论指导和技术支持。     

Health and population-dependent effects of ocean acidification on the marine isopod Idotea balthica

Three populations of the grazing isopod Idotea balthica were exposed to high CO₂ treatment for a period of 20 days to investigate the effect of ocean acidification (OA) on animal health and immunocompetence. The results of the populations from more saline habitats were comparable and showed a 60–80 % decrease in immune response as a result of the high CO₂ treatment. Analysis of protein carbonyls showed no treatment effect, indicating that short-term OA does not increase oxidative protein damage. Meanwhile, the third tested population from the lower saline Baltic Sea had higher background protein carbonyl levels. Ocean acidification in addition to this resulted in 100 % mortality. The results of this study show that OA reduced immunocompetence of this marine isopod. In addition, populations and individuals in poor health are potentially at greater risk to succumb under OA.     

聚乙烯醇凝胶包埋固定化细菌联合植物的除氮研究

为了解聚乙烯醇(PVA)凝胶包埋固定化菌在富营养化水体生态修复中的效果,利用PVA凝胶包埋固定硝化和反硝化细菌并联合水芹(Oenanthe clecumbens)和蕹菜(Ipomoea aquatica)2种植物进行21 d的除氮试验。结果表明,加菌试验组TN、NH4+-N、NO3--N、NO2--N及TP去除率显著高于无菌试验组(P0.05);各试验组N的去除效率与添加PVA凝胶包埋固定硝化和反硝化细菌呈显著正相关(P0.05)。添加PVA凝胶固定硝化和反硝化细菌的蕹菜和水芹试验组植物的平均生长速率(RGR)分别为38.5和19.6 mg·g-1·d-1,而单纯蕹菜和水芹试验组RGR分别为29.9和9.5 mg·g-1·d-1。     

Debunking the false dichotomy of leadership idealism and pragmatism: Critical evaluation and support of newer genre leadership theories

Leadership theories have shifted over the last few decades from a focus on managerial functions and economic leader–follower exchanges toward greater focus on the interpersonal dynamics occurring within the leadership process. Theories such as transformational, ethical, authentic, and other “newer genre” theories were created to address neglected topics such as leader vision and inspirational messages, transparency, emotional effects, morality, individualized attention, and intellectual stimulation. Critiques of these theories, however, have been raised. In this paper, we address five of those critiques and argue for the validity and practical effectiveness of the new genre theories. Further, we describe how newer genre leadership research should be viewed as a performative epistemology, entailing a process of co‐creation involving scholars and practitioners. Finally, from this view, we provide general ideas for leader development. Copyright © 2014 John Wiley & Sons, Ltd.