辽宁大伙房水库上游地区景观格局分析

以遥感影像作为基本信息源，在GLS的支持下，建立空间信息库，采用景观生态学研究方法，选取斑块大小，分维数，景观破碎度和景观优势度，均匀性，多样性指数等指标。对大伙房上游地区景观格局进行了分析。研究区内景观空间格局基本构型以森林为主的景观结构，景观生态体系功能状况较好。     

Profiles and removal efficiency of polycyclic aromatic hydrocarbons by two different types of sewage treatment plants in Hong Kong

Sewage discharge could be a major source of polycyclic aromatic hydrocarbons(PAHs) in the coastal waters. Stonecutters Island and Shatin Sewage Treatment Works(SCISTW and STSTW)in Hong Kong, adopted chemically enhanced primary treatment and biological treatment,respectively. This study aimed at(1) determining the removal efficiencies of PAHs,(2) comparing the capabilities in removing PAHs, and(3) characterizing the profile of each individual PAHs, in the two sewage treatment plants(STPs). Quantification of 16 PAHs was conducted by a Gas Chromatography. The concentrations of total PAHs decreased gradually along the treatment processes(from 301 ± 255 and 307 ± 217 ng/L to 14.9 ± 12.1 and 63.3 ± 54.1 ng/L in STSTW and SCISTW, respectively). It was noted that STSTW was more capable in removing total PAHs than SCISTW with average total removal efficiency 94.4% ± 4.12% vs. 79.2% ± 7.48%(p 0.05). The removal of PAHs was probably due to sorption in particular matter, confirmed by the higher distribution coefficient of individual and total PAHs in solid samples(dewatered sludge contained92.5% and 74.7% of total PAHs in SCISTW and STSTW, respectively) than liquid samples(final effluent-total contained 7.53% and 25.3% of total PAHs in STSTW and SCISTW, respectively).Despite the impressive capability of STSTW and SCISTW in removing PAHs, there was still a considerable amount of total PAHs(1.85 and 39.3 kg/year, respectively for the two STPs) being discharged into Hong Kong coastal waters, which would be an environmental concern.     

贵州万山汞矿区苔藓植物对汞的吸附和富集特征

在所设定的贵州万山汞矿区调查范围内,有6种苔藓植物,其中常见种为东亚褶叶藓和大羽藓.结果表明,苔藓能高度富集汞,东亚褶叶藓和大羽藓的汞含量随污染源距离和相对高度的增加而降低;不同苔藓对汞的吸附等温线具共同性,吸附量随平衡液浓度的增加而增大,东亚褶叶藓对Hg的吸附量比大羽藓大,吸附特征都能用Liner、Freundlic...     

直角拐弯通道中空气冲击波的传播及数值模拟

针对地下通道中空气冲击波的传播,通过试验研究,得到了空气冲击波在直角拐弯通道中传播的衰减系数.同时,应用流体网格法进行了数值模拟,获得了通道直角拐弯前后空气冲击波传播的波形图和流场图.并将两方面的研究成果进行了对比,证明了试验和数值研究方法及研究成果的一致性.     

A comprehensive review of the circulation of microplastics in aquatic ecosystem using scientometric method

Environmental Science and Pollution Research - Nowadays, the extensive application of microplastics (MPs) has led to the gradual accumulation of toxicity in aquatic environment and caused potential...     

Bifunctional catalysts for heterogeneous electro-Fenton processes: a review

Environmental Chemistry Letters - Fenton processes allow to degrade and mineralize toxic organic contaminants, yet classical Fenton processes require continuously adding hydrogen peroxide and...     

Effectiveness of predicting the spatial distributions of target contaminants of a coking plant based on their related pollutants

Environmental Science and Pollution Research - The prediction accuracy of the spatial distribution of soil pollutants at a site is relatively low. Related pollutants can be used as auxiliary...     

Sustainable ternary cement blends with high-volume ground granulated blast furnace slag–fly ash

Environment, Development and Sustainability - Coal fly ash and granulated ground blast furnace slag (GGBS) are more widely used as supplementary cementitious materials in cement production. This...     

Can environmental regulations break down domestic market segmentation? Evidence from China

Environmental Science and Pollution Research - While local protectionism and market segmentation owing to fiscal decentralization are not conducive to broad economic development, they may be...