基于旅游生态足迹模型的山东省旅游可持续发展评价

以生态足迹理论为基础,将旅游生态足迹引入区域旅游可持续发展评价,阐述了旅游生态足迹的概念,并构建旅游生态足迹模型,用于衡量旅游可持续发展能力。以山东省作为研究对象,对旅游生态足迹模型在大尺度区域旅游业可持续发展定量测度中的运用进行实证研究,计算其2000年-2004年的旅游生态足迹。结果表明：山东省近五年出现了不同程度的旅游生态赤字和生态压力,平均存在0.133 3 hm2/人的旅游生态赤字,旅游生态压力平均值为4.898 3,并呈现出明显的逐年递增趋势,其旅游业处于不可持续发展状态。     

许昌市臭氧污染趋势及时空分布特征研究

为研究许昌市的臭氧(O3)污染情况及时空分布特征,对2014年-2016年许昌市3个国家环境空气监测点位的监测数据进行了统计分析.结果表明:2014年-2016年,许昌市O3污染状况整体呈加重趋势,2016年污染最为严重;O3浓度和超标天数均具有明显的季节变化特征,春末和夏季的O3污染最为严重;不同季节的O3、NO2、NO和NOx浓度日变化也不尽相同,同时O3具有明显的日变化特征,呈单峰型分布,峰值出现在14:00~15:00;并且O3与NO2具有较好的相关性.     

我国核电发展现状浅析

核电作为一种安全的清洁能源,对于优化能源结构、减少环境污染、具有重要意义。本文介绍了我国核电的现状,从安全性、环保性、经济性几方面对核电进行分析比较,说明积极推进核电发展是我国未来电力发展的选择。     

沉积物间隙水的几种制备方法

间隙水的制备对研究沉积和中物质的动力学非常重要。间隙水的制备方法有离心法、压榨法、渗析法、吸气引液法等，这些方法各有利弊。本文对这些方法分别进行了了综合比较。     

普光气田含硫污水尾气处理工艺应用与优化

针对中国石化普光气田产出水属于典型的含硫污水,密闭处理系统中产生大量高含硫尾气,论述了尾气处理工艺中存在的问题,优化了单一的生物除硫、活性炭吸附工艺,增加了一级碱洗、氧化除硫工艺,实现尾气达标排放。     

Activity maintenance of the excised branches and a case study of NO2 exchange between the atmosphere and P. nigra branches

The efficient maintenance of the activity of excised branches is the powerful guarantee to accurately determine gas exchange flux between the detached branches of tall trees and the atmosphere. In this study, the net photosynthetic rate(NPR) of the excised branches and branches in situ were measured simultaneously by using two photosynthetic instruments to characterize the activity of the excised branches of Phyllostachys nigra. The ratio of normalized NPR of excised branches to NPR in situ was used to assess the photosynthetic activity of detached branches. Based on photosynthetic activity, an optimal hydroponics protocol for maintaining activity of excised P. nigra branches was presented:1/8 times the concentration of Gamborg B5 vitamin mixture with p H = 6. Under the best cultivation protocol, photosynthetic activity of excised P. nigra branches could be maintained more than 90% within 6 hr in the light intensity range of 200–2000 μmol/(m2·sec) and temperature range of 13.4–28.7°C. The nitrogen dioxide(NO2) flux differences between in situ and in vitro branches and the atmosphere were compared using double dynamic chambers.Based on the maintenance method of excised branches, the NO2 exchange flux between the excised P. nigra branches and the atmosphere(from-1.01 to-2.72 nmol/(m2·sec) was basically consistent with between the branches in situ and the atmosphere(from-1.12 to-3.16 nmol/(m2 sec)) within 6 hr. Therefore, this study provided a feasible protocol for in vitro measurement of gas exchange between tall trees and the atmosphere for a period of time.     

Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia

A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH_3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns(XRD), Scanning electron microscopy(SEM), Transmission electron microscopy(TEM), N_2 sorption-desorption, nuclear magnetic resonance(NMR), Inductively Coupled Plasma-Atomic Emission spectrometer(ICP-AES), X-ray absorption spectroscopy(XPS),Temperature-programmed desorption of ammonia(NH_3-TPD), Ultraviolet visible diffuse reflectance spectroscopy(UV-Vis DRS) and Temperature programmed reduction(TPR).The analysis results indicate that the high activities of Cu-SAPO-34 catalysts could be attributed to the enhancement of redox property, the formation of mesopores and the more acid sites. Furthermore, the kinetic results verify that the formation of mesopores remarkably reduces diffusion resistance and then improves the accessibility of reactants to catalytically active sites. The 1.0-Cu-SAPO-34 catalyst exhibited the high NO conversion( 90%) among the wide activity temperature window in the range of 150–425℃.     

防止井下作业污染环境的工艺技术应用

分析了井下作业施工对环境造成污染的因素，介绍江苏油田在井下作业过程中进行污染防治的措施及其相关配套新工艺、新技术的应用和效果。     

太原市城市化发展对城市气温变化影响的定量化研究

采用位于同一纬度的太原气象站与远郊区农村气象站获取的1957年-2014年的气象数据,用皮尔卡森相关系数、一元线性回归、城市化影响分析等方法研究了在全球气候变暖背景下城市地区气温变化趋势以及城市化影响.结果表明:城市年平均气温升高趋势明显高于农村;城市年极端高温与农村极端高温升高趋势差异不明显;城市年极端低温升高趋势显著高于农村.就城市化影响而言,城市化对年平均气温、年极端低温趋势影响明显,但对年极端高温趋势影响微弱.     

高选择性基因工程菌E.coli SE5000生物富集水体中的镍离子

利用基因工程菌E．coli SE5000对水体中的镍离子进行富集研究．菌体细胞对Ni^2 的富集速率很快,富集过程满足Langmuir等温线模型．经基因改造的基因工程菌不仅最大镍富集容量与原始宿主菌相比增加了4倍多,而且对pH值的变化呈现出更强的适应性．对离子强度及其它共存重金属离子的影响的实验结果表明：Na^ ,Ca^2 ,Cd^2 ,Pb^2 的影响较小,但Mg^2 ,Hg^2 ,Cr^3 和Cu^2 所引起的负面效应较大．金属螯合剂EDTA的存在对基因工程菌的富集行为影响很大．