Environmental Science and Pollution Research - The present study was carried out to elucidate effects of synthesized magnetic nanoparticles (MNPs) on morphological and physiological parameters and... 相似文献
Environmental Economics and Policy Studies - To estimate the impact of air pollution on well-being, we combine a set of repeated cross-sectional surveys of individuals with high-resolution... 相似文献
Journal of Polymers and the Environment - This investigation compared the adsorption behavior of humic acid (HA) on cellulose, chitosan and nano zerovalent iron/chitosan (nZVI/chitosan). Results... 相似文献
Food and Environmental Virology - The worldwide COVID-19 pandemic has brought significant consideration toward innovative strategies for overcoming the viral spread. Nanotechnology will change our... 相似文献
This work investigates the potentials of lemon balm (Melissa officinalis L.) stalk (LBS), a massive waste part of medicinal plant, for pulp and papermaking by assessing its fiber characteristics
and chemical composition. In addition, LBS properties were compared with some important agro-residues such as bagasse stalk
(BS), cotton stalk (CS) and tobacco stalk (TS). There is no information about suitability of the LBS in the open literature.
Chemically, LBS fibers contain a relatively high percentage of alpha-cellulose (32.7%), but a low percentage of lignin (25%),
which benefits pulping and bleaching. The hemicelluloses in LBS are mainly glucose and xylose. Ash content was about 6%, superior
to the average value corresponding to woods, which makes pulping difficult. It was verified that the chemical compositions
of the studied agro-residues vary significantly. Morphologically, the LBS fibers are comparable to those of hardwoods. Rather
a significant amount of parenchyma cells was found in LBS. The TS has the highest average fiber length, while the LBS has
the least, and the lengths of BS and CS fibers fall in between. In general, based on the results of this study, some propositions
can be made about the possible applications of LBS as a non-wood renewable source of natural products for use in the production
of pulp and paper. 相似文献
In this study, the optimal sizing and performance analysis of a standalone integrated solar power system equipped with different storage scenarios to supply the power demand of a household is presented. One of the main purposes when applying solar energy resource is to face the increasing environmental pollutions resulting from fossil fuel based electricity sector. To this end, and to compare and examine two energy storage technologies (battery and hydrogen storage technology), three storage scenarios including battery only, hydrogen storage technology only and hybrid storage options are evaluated. An optimization framework based on Energy Hub concept is used to determine the optimum sizes of equipment for the lowest net present cost (NPC) while maintaining the system reliability. It was determined that the most cost effective and reliable case is the system with hybrid storage technology. Also, the effects of solar radiation intensity, the abatement potential of CO2 emissions and converting excess power to hydrogen on the system’s performance and economics, were investigated and a few noticeable findings were obtained. 相似文献
This study was concerned with chromium as a potential carcinogenic contaminant in 64 wells located in five aquifers, southwest of Iran. A probabilistic health risk assessment indicated a high risk to the local residents including adults and children in the study area. A sequential sensitivity analysis and a novel approach known as multivariate global sensitivity analysis using both principal component analysis and B-spline were applied to investigate the behavior of health risk model along time considering four independent input parameters in the risk equation. In this context, based on the results of sensitivity analysis, concentration of chromium in drinking water (Cw) and body weight (W) were the most influential parameters. Random forest (RF) was used as a variable selection method to choose the most influential parameters for the prediction of chromium. Five parameters, among 13 water quality variables, including phosphate, nitrate, fluoride, manganese and iron were selected by RF as the most important parameters for spatial prediction. Hybrid methods of RF and ordinary kriging (RFOK) and RF and inverse distance weighting (RFIDW) were then applied for spatial prediction of Cr using the secondary variables. The RFOK and RFIDW were more efficient than that of ordinary kriging (OK) with respect to a cross-validation algorithm. For instance, in terms of relative root mean squared error, the performance of OK was improved from 31.72 to 23.21 and 23.61 for RFOK and RFIDW, respectively.
Regarding various types of pollutant, waste management requires high attention. Environmental site selection study, prior
to landfill operation, and subsequently, monitoring and maintaining of the location, are of foremost points in landfill site
selection process. By means of these studies, it is possible to control the undesirable impacts caused by landfills. Study
ahead aims at examination of effectiveness of a new method called Monavari 95–2 in landfill site assessment. For this purpose,
two landfills Rasht and Andisheh, which are, respectively, located on humid and arid areas, were selected as case studies.
Then, the results obtained from both sites were compared with each other to find out the weaknesses and strengths of each
site. Compared with others similar methods, much more criteria (53 parameters) can be considered within this method, so the
results will be more calculable. According to this method, Rasht landfill (site H) is classified as unacceptable landfill
site i.e. there is an urgent need for a new suitable site for landfill, while Andishe Landfill (site D) is ranked as acceptable
landfill site but needs environmental management program to handle the existing weaknesses. 相似文献
Planning for the future is uncertain, and scenario analysis is a method of coping with the uncertainties of future plans. This paper addresses how to deal with future uncertainties by using scenario analysis as a possible approach for conducting a strategic environmental assessment (SEA). Although scenario-based approaches have been linked to strategic planning and SEA, this paper for the first time proposes how a combined approach may be implemented using specific tools and methodologies and, further on, it also implements the first three stages of the six stages proposed for the ‘scenario-based strategic planning’ approach. This work is an attempt to standardize SEA and scenario analysis as a combined approach. The three stages are tested within the Tourism Development Plan of the Iranian province of Gilan, which has been selected as a case study. 相似文献