Functionalized porous nanoscale Fe3O4 particles supported biochar from peanut shell for Pb(II) ions removal from landscape wastewater

Environmental Science and Pollution Research - The large amounts ofheavy metal from landscape wastewater have become serious problems of environmental pollution and risks for human health. The...     

Enantioselective hydrolysis and photolysis of mandipropamid in different aquatic environments — evaluation of influencing factors

Environmental Science and Pollution Research - The hydrolysis and photolysis of the chiral fungicide mandipropamid were investigated, and the potential enantioselectivity of mandipropamid in...     

Influence of shrub root combinations and spacing on slope stability: study case at the Yongding River flooding regime,Langfang, China

Environmental Science and Pollution Research - Research on the mechanism of plant root–soil consolidation is a current focus in research into the ecological restoration of banks. The...     

Sources of nitrous and nitric oxides in paddy soils：Nitrification and denitrification

Rice-paddies are regarded as one of the main agricultural sources of N 2O and NO emissions. To date, however, specific N2O and NO production pathways are poorly understood in paddy soils. ^15N-tracing experiments were carded out to investigate the processes responsible for N2O and NO production in two paddy soils with substantially different soil properties. Laboratory incubation experiments were carried out under aerobic conditions at moisture contents corresponding to 60% of water holding capacity. The relative importance of nitrification and denitrification to the flux of NaO was quantified by periodically measuring and comparing the enrichments of the N2O, NH~-N and NO3-N pools. The results showed that both N2O and NO emission rates in an alkaline paddy soil with clayey texture were substantially higher than those in a neutral paddy soil with silty loamy texture. In accordance with most published results, the ammonium N pool was the main source of N2O emission across the soil profiles of the two paddy soils, being responsible for 59.7% to 97.7% of total N2O emissions. The NO3-N pool of N2O emission was relatively less important under the given aerobic conditions. The rates of N2O emission from nitrification （N2On） among different soil layers were significantly different, which could be attributed to both the differences in gross N nitrification rates and to the ratios of nitrified N emitted as NzO among soil layers. Furthermore, NO fluxes were positively correlated with the changes in gross nitrification rates and the ratios of NO/N2O in the two paddy soils were always greater than one （from 1.26 to 6.47）. We therefore deduce that, similar to N2O, nitrification was also the dominant source of NO in the tested paddy soils at water contents below 60% water holding capacity.     

Emotional appeal in recruitment advertising and applicant attraction: Unpacking national cultural differences

We investigated the impact of the type of emotional appeal (ego‐focused vs. other‐focused) used in recruiting advertisements on applicant attraction to firms through two experimental studies across three countries (the United States, China, and Singapore). In Study 1, we made a traditional cultural comparison between the United States and China, whose dominant cultural values are characterized by individualism and collectivism, respectively. We found applicants in the United States were more strongly attracted to firms whose recruiting advertisements were based on an ego‐focused emotional appeal, while applicants in China were more attracted to firms that used ads with an other‐focused emotional appeal. Study 2 was conducted in bicultural Singapore. We primed bicultural applicants to be either the individualistic or collectivistic aspect of their cultural heritage. Applicants with individualist priming were attracted to recruiting advertisements with an ego‐focused emotional appeal, whereas applicants with collectivist priming were attracted to advertisements with an other‐focused emotional appeal. In addition, both studies revealed that a job applicant's regulatory focus (promotion vs. prevention) mediated the influence of national culture on the relationship between type of emotional appeal and applicant attraction to firms. Practical implications and suggestions for future research also are discussed. Copyright © 2016 John Wiley & Sons, Ltd.     

热荷载与风荷载作用下点式支承玻璃的破裂行为规律

在高层建筑火灾中,玻璃幕墙的破裂受到环境风和室内火灾的共同影响。研究了600 mm×600 mm×6mm的浮法玻璃幕墙在点支承安装方式下受到热辐射荷载和风荷载情况下的响应规律。分析了不同工况下玻璃表面的温度变化、风荷载的大小与玻璃破裂时间的关系、玻璃破裂与温差之间的关系、玻璃裂纹扩展及其与风速之间的关系。结果表明在玻璃两侧分别受到热辐射和风荷载共同作用时,风荷载的增加会加速玻璃的破裂。研究结果可为玻璃幕墙的工程应用提供技术支撑。     

Long-term declining in carbon monoxide(CO) at a rural site of Beijing during 2006–2018 implies the improved combustion efficiency and effective emission control

Carbon monoxide(CO) is primarily the result of incomplete combustion, which has important impacts on the atmospheric chemical cycle and climate. Improved quantitative characterization of long-term CO trends is important for both atmospheric modeling and the design and implementation of policies to efficiently control multiple pollutants. Due to the limitations of high time-resolution and high-quality long-term observational data, studies on long-term trends in the CO concentration in China are q...     

基于功能需求导向的城市综合体震后修复路径优化方法研究∗

城市综合体内部功能繁多,强震作用下综合体结构功能失效会影响城市区域功能的正常运转。建筑震后修复期望综合体内部重要功能优先、快速恢复并投入使用,合理规划其震后修复路径是满足此类结构功能需求的关键。既有研究中建筑震后多采取自下而上的修复路径,未考虑震后功能需求。基于此,提出了一种基于功能需求导向的城市综合体震后修复路径优化方法。考虑综合体具有的多功能特性及不同功能区内构件间的功能相关性特点,建立了基于故障树的功能损失分析模型,并以此为基础结合建筑功能区划分功能修复单元;以各功能的期望修复时间作为功能需求目标,对比功能修复单元的实际修复时间,提出功能需求目标完成率指标;在此基础上建立震后修复路径优化模型,结合遗传算法,形成了综合体震后修复路径优化方法。对某城市综合体开展震后修复路径优化,结果表明：所提方法可高效完成功能需求目标,使重要功能震后快速恢复并投入使用。     

渗滤液污染羽中沉积物氧化还原缓冲能力研究

通过土柱模拟实验研究含水层沉积物的氧化还原缓冲能力及其在不同氧化还原带中的变化.结果表明,随着污染的加重,沉积物的氧化容量(OXC)减小,而还原容量(RDC)升高.在未受污染的沉积物中,Fe³⁺是OXC的主要组成,约占OXC的70.5%;TOC是RDC的主要组成,约占RDC的98.7%.在厌氧环境中大部分无定型态和部分晶体态Fe³⁺被还原,还原产物主要以FeCO₃和FeS形式沉淀;在产甲烷带/硫酸盐还原带和铁还原带中,Fe²⁺的沉积使得可离子交换态Fe²⁺含量由原样中的0.5%分别升高至3%和1.84%.因此Fe³⁺是含水层中主要的氧化还原缓冲剂,Fe³⁺还原、Fe²⁺沉淀和Fe2+的离子交换等作用大大减小了厌氧渗滤液污染羽的扩展,对进入含水层的还原性污染物有重要的缓冲作用.