硅烷化改性沸石对重金属离子的吸附性能

制得一种用于重金属废水处理的新型硅烷化改性沸石吸附剂,成本低、效果显著且稳定。通过对改性沸石表征,分析了改性对沸石结构的影响。结果表明,改性一定程度降低了原沸石的晶体特征,但基本上保持了其结构组成;硅烷化改性成功地在沸石上接枝了氨基。对硅烷化沸石的特性研究,得出硅烷化沸石对Ni2+、Cu2+、Zn2+和Pb2+吸附最佳投加量为1、1、1.6和0.6 g/L,且此时对4种离子的去除率也较好;吸附动力学研究得出,其吸附过程可用二级动力学方程较好地拟合;吸附达到平衡时,4种金属离子的平衡吸附量分别为11.23、17.41、15.45和59.42 mg/g;硅烷化沸石对金属离子的吸附行为更符合Langmuir模型,为化学吸附;在酸性条件下(pH=2～6),硅烷化沸石仍保持一定的吸附能力,具有一定的耐酸性。     

Making nature conservation modern: an analysis of developments in nature conservation policy in relation to macro-social changes—the Netherlands as a case study

It is often said that we live in the ecological era. It is also often said that society has entered a new phase, which—depending on the theoretical orientation—is called post-modern, post-industrial or risk society. This article analyses to what extent the presupposed shift to a phase beyond modernity is reflected in nature conservation policy. To do so, an analysis is first made of whether the basic perception and appreciation of nature in latter-day society differs essentially from perceptions and appreciations that were dominant during the heyday of modernity. When this turns out not to be the case, the development of nature conservation policy in the Netherlands during the last decades of the twentieth century is investigated to establish if conservation policy—that is, the way in which society deals with nature—has fundamentally changed. The conclusion is that Dutch policy with regard to nature has been undergoing a process of belated modernization in the sense that it is striving towards a firmer base in science and a more objective and quantifiable process of policy development. This can be seen as removing a pre-modern relic from modern society. At the same time, there is a late-modern drive towards consensus building and communication, which cannot be reconciled entirely with the stronger orientation towards science as the sole basis for deciding which kind of nature and how nature should be protected. Copyright © 2002 John Wiley & Sons, Ltd.     

Sentiment analysis of the Twitter response to Netflix's Our Planet documentary

The role of nature documentaries in shaping public attitudes and behavior toward conservation and wildlife issues is unclear. We analyzed the emotional content of over 2 million tweets related to Our Planet, a major nature documentary released on Netflix, with dictionary and rule-based automatic sentiment analysis. We also compared the sentiment associated with species mentioned in Our Planet and a set of control species with similar features but not mentioned in the documentary. Tweets were largely negative in sentiment at the time of release of the series. This effect was primarily linked to the highly skewed distributions of retweets and, in particular, to a single negatively valenced and massively retweeted tweet (>150,000 retweets). Species mentioned in Our Planet were associated with more negative sentiment than the control species, and this effect coincided with a short period following the airing of the series. Our results are consistent with a general negativity bias in cultural transmission and document the difficulty of evoking positive sentiment, on social media and elsewhere, in response to environmental problems.     

垃圾填埋场选址与风水选址浅析

通过对风水理论中关于选址要素的科学阐述,从自然环境和社会环境两个方面分析了风水选址和垃圾填埋场选址的共通与不同之处,并根据风水理论中“天人合一”的和谐理念,提出了在填埋场选址过程中,应该融入崇尚自然,尊重自然;结合实际,因地制宜;整体系统;以人为本,和谐构建等原则。     

自然保护区生态旅游开发与管理对策研究

充分利用自然保护区的旅游资源优势开展生态旅游 ,目前已得到国内外的共识 ,但旅游开发对自然保护区的影响问题同样也引起了人们的广泛关注。本文在分析我国自然保护区生态旅游发展现状的基础上 ,针对旅游开发中存在的问题 ,就如何正确处理自然保护和旅游开发的矛盾进行了探讨 ,并提出了我国自然保护区生态旅游发展的战略和管理对策。     

长江流域的自然保护区发展与生态环境建设

长江流域的自然保护区占全流域面积的5．74％,比我国自然保护区 占国土面积的比例低1．9个百分点。保护区数量在80年代增幅最大,面积在90年代增幅最大,这种不同步性在一定程度上反映出保护区经营管理更加注重建立较多的大保护区,保护较大的生态系统。本流域的各类自然保护区的数量和面积与流域内自然生态系统类型的丰富性和珍稀特种的多样性直接相关。生态系统类的自然保护区多分布在长江一线以南,形成4个明显的集中分布地带。野生生物类自然保护区在川西高原、川黔湘接壤带和鄱阳湖附近比较集中。川西南滇西北、川西高山峡谷区、川鄂湘黔接壤区、南岭山地北部等6个区域成为长江流域自然保护的关键区域。长江流域生态环境建设中必须注意资源植物的持续利用、防护林的质量和生态平衡等问题。     

Odontological characteristics of European brown bears from the Central Forest Biosphere Nature Reserve

Forty-five skulls of European brown bears from the Central Forest Nature Reserve and adjacent regions were examined in detail. The frequencies of oligodonty, dental caries, parodontosis, and traumatized teeth were estimated. A total of 12 variants of the tooth formula were described. The sample under study was distinguished from the populations examined previously by the lowest frequency of oligodonty. Dental caries in one or several teeth, caused by mechanical damage or malocclusion, occurred in 14% of animals. Strong wear marks on the canines caused by feeding on oats frequently resulted in broken canines in bears of the senior age groups.     

Connectedness to nature,place attachment and conservation behaviour: Testing connectedness theory among farmers

The aim of this study was to explore the relationship between pro-environmental behaviour and two forms of emotional association: attachment to place and connectedness to nature. This relationship is explored in the context of farmers' management of native vegetation on their properties. A postal survey was conducted to measure the extent to which farmers felt connected to nature and to their property. The survey also measured vegetation management behaviours and associated valued outcomes. A total of 141 farmers in northwest Victoria, Australia, completed the survey. Results showed that vegetation protection behaviours increased with connectedness to nature (CNS), although CNS accounted for only a modest amount of the variation in behaviour. Place attachment was not related to management behaviours. Further analysis suggested that the relationship between CNS and management behaviour was mediated by importance given to environmental benefits of vegetation management. The findings lend weight to studies showing a relationship between CNS and more simple conservation behaviours (e.g. recycling). The findings are also consistent with frameworks suggesting that emotional association with nature leads to an expanded sense of self and greater valuing of non-human species, and so to pro-environment behaviour. This demonstrates the importance of using a range of instrumental and more affective strategies to promote conservation behaviours.     

再生资源行业特点与企业盈利模式分析

再生资源行业涉及第一、第二与第三产业,其独特的行业属性对行业企业发展战略的制定有着重大的影响。随着循环经济产业的快速发展,针对不同企业、不同业务、不同工作对象的企业运营策略的制定,显得尤为重要。对再生资源行业本质与行业特点的分析解读,为企业明确发展思路、制定发展战略提供策略与方法上的参考。     

基于GIS技术的万州区人居环境自然适宜性

科学度量人居环境自然适宜性空间格局,对于界定主体功能区和人口发展功能区、引导人口合理分布与流动,促进人口与资源协调发展具有重要意义。运用GIS技术,建立包括地形起伏度、地被指数、水文指数和自然灾害危险度的万州区人居环境自然适宜程度空间格局。结果显示万州区的人居环境指数介于1642~8460。沿长江一带自然适宜程度最高,西北其次,东南部最差。比较适宜区面积最广,占万州区总面积的31%;一般适宜区居次,占2481%;临界适宜区占1892%;高度适宜区面积占1576%,不适宜地区面积最小,仅占95%。万州区总人口的7713%分布在一般适宜区及其以上的区域,相应面积占全区域的7158%,说明人居环境的自然适宜程度从根本上决定着万州区人口分布的地理格局。实证表明基于GIS技术的测评人居环境自然适宜性的空间格局,能引导人口有序流动和适度聚集,促进人口与经济社会、资源环境的协调和可持续发展提供科学依据和重要参考