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https://read.qxmd.com/read/30776606/effect-of-impure-components-in-flue-gas-desulfurization-fgd-gypsum-on-the-generation-of-polymorph-caco-3-during-carbonation-reaction
#1
Bo Wang, Zihe Pan, Zhiping Du, Huaigang Cheng, Fangqin Cheng
As one of the typical solid-wastes, FGD gypsum usually occupies land and causes resource waste and environmental pollution. Its high content of CaSO4 ·2H2 O shows highly potential in synthesizing CaCO3 by incorporating CO2 . Nevertheless, the impurities in FGD gypsum have significant effects on polymorph of CaCO3 and the formation mechanism of CaCO3 polymorph during FGD gypsum carbonation was still unclear. Here, we selected CaSO4 ·2H2 O as model to explore the effects of impurities of muscovite and dolomite in FGD gypsum on polymorph of CaCO3 during carbonation...
February 4, 2019: Journal of Hazardous Materials
https://read.qxmd.com/read/30771667/land-subsidence-hazard-modeling-machine-learning-to-identify-predictors-and-the-role-of-human-activities
#2
Omid Rahmati, Ali Golkarian, Trent Biggs, Saskia Keesstra, Farnoush Mohammadi, Ioannis N Daliakopoulos
Land subsidence caused by land use change and overexploitation of groundwater is an example of mismanagement of natural resources, yet subsidence remains difficult to predict. In this study, the relationship between land subsidence features and geo-environmental factors is investigated by comparing two machine learning algorithms (MLA): maximum entropy (MaxEnt) and genetic algorithm rule-set production (GARP) algorithms in the Kashmar Region, Iran. Land subsidence features (N = 79) were mapped using field surveys...
February 12, 2019: Journal of Environmental Management
https://read.qxmd.com/read/30765853/recombination-within-the-cepaea-nemoralis-supergene-is-confounded-by-incomplete-penetrance-and-epistasis
#3
Daniel Ramos Gonzalez, Amaia Caro Aramendia, Angus Davison
Although the land snail Cepaea nemoralis is one of the most thoroughly investigated colour polymorphic species, there have been few recent studies on the inheritance of the shell traits. Previously, it has been shown that the shell polymorphism is controlled by a series of nine or more loci, of which five make a single 'supergene' containing tightly linked colour and banding loci and more loosely linked pigmentation, spread band and punctate loci. However, one limitation of earlier work was that putative instances of recombination between loci within the supergene were not easily verified...
February 14, 2019: Heredity
https://read.qxmd.com/read/30765841/discovery-of-recurring-slope-lineae-candidates-in-mawrth-vallis-mars
#4
Anshuman Bhardwaj, Lydia Sam, F Javier Martín-Torres, María-Paz Zorzano
Several interpretations of recurring slope lineae (RSL) have related RSL to the potential presence of transient liquid water on Mars. Such probable signs of liquid water have implications for Mars exploration in terms of rover safety, planetary protection during rover operations, and the current habitability of the planet. Mawrth Vallis has always been a prime target to be considered for Mars rover missions due to its rich mineralogy. Most recently, Mawrth Vallis was one of the two final candidates selected by the European Space Agency as a landing site for the ExoMars 2020 mission...
February 14, 2019: Scientific Reports
https://read.qxmd.com/read/30765790/gis-and-ahp-techniques-based-delineation-of-groundwater-potential-zones-a-case-study-from-southern-western-ghats-india
#5
P Arulbalaji, D Padmalal, K Sreelash
Over-exploitation of groundwater and marked changes in climate over the years have imposed immense pressure on the global groundwater resources. As demand of potable water increases across the globe for human consumption, agriculture and industrial uses, the need to evaluate the groundwater potential and productivity of aquifers also increases. In the recent years, geographic information system based studies have gained much prominence in groundwater exploration because it is rapid and will provide first - hand information on the resource for further developments...
February 14, 2019: Scientific Reports
https://read.qxmd.com/read/30761499/the-economic-and-environmental-benefits-analysis-for-food-waste-anaerobic-treatment-a-case-study-in-beijing
#6
Xiaopeng Guo, Xiaoyu Yang
The disposal of food waste has attracted worldwide attention. Each year, the amount of wasted food accounts for an estimated one third of annual food production globally. This large amount of food waste has caused serious land, water, and air pollution. In the past, most research on food waste was focused solely on food waste disposal processing. Only a few studies analysed the flow of materials in food waste treatment processes. Therefore, this paper focused on the process of food waste anaerobic treatment in Beijing and investigated the treatment...
February 14, 2019: Environmental Science and Pollution Research International
https://read.qxmd.com/read/30759759/quantitative-evaluation-of-the-eco-environment-in-a-coalfield-based-on-multi-temporal-remote-sensing-imagery-a-case-study-of-yuxian-china
#7
Xue Wang, Kun Tan, Kailei Xu, Yu Chen, Jianwei Ding
With the exploitation of coalfields, the eco-environment around the coalfields can become badly damaged. To address this issue, "mine greening" has been proposed by the Ministry of Land and Resources of China. The sustainable development of mine environments has now become one of the most prominent issues in China. In this study, we aimed to make use of Landsat 7 ETM+ and Landsat 8 OLI images obtained between 2005 and 2016 to analyze the eco-environment in a coalfield. Land cover was implemented as the basic evaluation factor to establish the evaluation model for the eco-environment...
February 12, 2019: International Journal of Environmental Research and Public Health
https://read.qxmd.com/read/30759601/water-resource-potential-for-large-scale-sweet-sorghum-production-as-bioenergy-feedstock-in-northern-china
#8
HaiMei Fu, YanHua Chen, XiaoMei Yang, JiaYing Di, MingGang Xu, BaoGui Zhang
This study investigated the water resource potential for bioenergy production from sweet sorghum (Sorghum bicolor (L.)) in Northern China according to the distribution of water resources, climate conditions and the total water consumption of bioenergy based on sweet sorghum, which consisted of blue water, green water and grey water. At a case study site in Inner Mongolia, simulation with a plant phenological model was used to determine whether sweet sorghum could reach the harvestable stage for sugar juice production...
February 25, 2019: Science of the Total Environment
https://read.qxmd.com/read/30759546/modelling-the-impact-of-land-use-management-on-water-resources-in-a-tropical-inland-valley-catchment-of-central-uganda-east-africa
#9
Geofrey Gabiri, Constanze Leemhuis, Bernd Diekkrüger, Kristian Näschen, Stefanie Steinbach, Frank Thonfeld
A combination of climate change, food demand, population growth, and other driving forces are causing land use and land cover change (LULC) in wetlands of Sub Saharan Africa (SSA). This has a profound effect on water resources, thus it is imperative that such consequences arising from these changes are predicted accurately to support land use management. For that, local scale studies are required to understand the system and to perform scenario analysis. The focus of this study was on small scale inland valleys which are common in SSA...
February 25, 2019: Science of the Total Environment
https://read.qxmd.com/read/30759171/landscape-and-local-site-variables-differentially-influence-pollinators-and-pollination-services-in-urban-agricultural-sites
#10
Ashley B Bennett, Sarah Lovell
Urbanization has detrimental effects on biodiversity and ecosystem functioning, as agricultural and semi-natural habitats are converted into landscapes dominated by built features. Urban agricultural sites are a growing component of urban landscapes and have potential to serve as a source of biodiversity conservation and ecosystem service provisioning in urban areas. In 19 urban agricultural sites, we investigated how surrounding land cover and local site variables supported bees and pollination services. We found the abundance of bees differentially responded to landscape and local scale variables depending on body size and nesting habit...
2019: PloS One
https://read.qxmd.com/read/30759107/identifying-species-threatened-with-local-extinction-in-tropical-reef-fisheries-using-historical-reconstruction-of-species-occurrence
#11
Sarah M Buckley, Tim R McClanahan, Eréndira M Quintana Morales, Victor Mwakha, Jatieno Nyanapah, Levy M Otwoma, John M Pandolfi
Identifying the species that are at risk of local extinction in highly diverse ecosystems is a big challenge for conservation science. Assessments of species status are costly and difficult to implement in developing countries with diverse ecosystems due to a lack of species-specific surveys, species-specific data, and other resources. Numerous techniques are devised to determine the threat status of species based on the availability of data and budgetary limits. On this basis, we developed a framework that compared occurrence data of historically exploited reef species in Kenya from existing disparate data sources...
2019: PloS One
https://read.qxmd.com/read/30747915/a-stream-classification-system-for-the-conterminous-united-states
#12
Ryan A McManamay, Christopher R DeRolph
Stream classifications are important for understanding stream ecosystem diversity while also serving as tools for aquatic conservation and management. With current rates of land and riverscape modification within the United States (US), a comprehensive inventory and evaluation of naturally occurring stream habitats is needed, as this provides a physical template upon which stream biodiversity is organized and maintained. To adequately represent the heterogeneity of stream ecosystems, such a classification needs to be spatially extensive where multiple stream habitat components are represented at the highest resolution possible...
February 12, 2019: Scientific Data
https://read.qxmd.com/read/30743974/anthropic-impacts-on-sub-saharan-urban-water-resources-through-their-pharmaceutical-contamination-yaound%C3%A3-center-region-cameroon
#13
P Branchet, N Ariza Castro, H Fenet, E Gomez, F Courant, D Sebag, J Gardon, C Jourdan, B Ngounou Ngatcha, I Kengne, E Cadot, C Gonzalez
Sub-Saharan urban centers have to tackle high population growth, lack of sanitation infrastructures and the need for good quality water resources. To characterize the impacts of anthropization on the water resources of the capital of Cameroon (Yaoundé), a multi-disciplinary approach was used in ten sub-watersheds (peri-urban and urban) of the Méfou watershed. Pharmaceutical residues were used as tracers of surface and groundwater contamination caused by the release of domestic wastewater from pit latrines and landfills...
April 10, 2019: Science of the Total Environment
https://read.qxmd.com/read/30743890/delayed-nitrate-dispersion-within-a-coastal-aquifer-provides-constraints-on-land-use-evolution-and-nitrate-contamination-in-the-past
#14
M Erostate, F Huneau, E Garel, M F Lehmann, T Kuhn, L Aquilina, V Vergnaud-Ayraud, T Labasque, S Santoni, S Robert, D Provitolo, V Pasqualini
Identifying sources of anthropogenic pollution, and assessing the fate and residence time of pollutants in aquifers is important for the management of groundwater resources, and the ecological health of groundwater dependent ecosystems. This study investigates anthropogenic contamination in the shallow alluvial aquifer of the Marana-Casinca, hydraulically connected to the Biguglia lagoon (Corsica, France). A multi-tracer approach, combining geochemical and environmental isotopic data (δ18 O-H2 O, δ2 H-H2 O, 3 H, δ15 N-NO3 - , δ18 O-NO3 - , δ11 B), and groundwater residence-time tracers (3 H and CFCs) was carried out in 2016, and integrated with a study of land use evolution in the catchment during the last century...
December 10, 2018: Science of the Total Environment
https://read.qxmd.com/read/30741984/a-comparison-of-different-grace-solutions-in-terrestrial-water-storage-trend-estimation-over-tibetan-plateau
#15
Wenlong Jing, Pengyan Zhang, Xiaodan Zhao
The Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage anomalies (TWSA) estimations provide valuable information for the monitoring of land water resources changes. Multiple parameters and strategies for inversion of the water storage changes have been explored. The explorations on differences between GRACE solutions in local regions and basins are fundamental and important. This study focuses on comparisons of TWSA trends between different GRACE solutions over Tibetan Plateau (TP), both storage and flux among solutions were compared...
February 11, 2019: Scientific Reports
https://read.qxmd.com/read/30740563/the-role-of-botanical-gardens-in-scientific-research-conservation-and-citizen-science
#16
REVIEW
Gao Chen, Weibang Sun
Plant diversity is currently being lost at an unprecedented rate, resulting in an associated decrease in ecosystem services. About a third of the world's vascular plant species face the threat of extinction due to a variety of devastating activities, including, over-harvesting and over exploitation, destructive agricultural and forestry practices, urbanization, environmental pollution, land-use changes, exotic invasive species, global climate change, and more. We therefore need to increase our efforts to develop integrative conservation approaches for plant species conservation...
August 2018: Plant Diversity
https://read.qxmd.com/read/30739954/a-5-step-land-reuse-and-redevelopment-model-resources-to-spur-local-initiatives
#17
Laurel Berman, Miles Ballogg, Serap Erdal
No abstract text is available yet for this article.
February 2019: Journal of Environmental Health
https://read.qxmd.com/read/30738261/the-disappearing-salton-sea-a-critical-reflection-on-the-emerging-environmental-threat-of-disappearing-saline-lakes-and-potential-impacts-on-children-s-health
#18
Jill E Johnston, Mitiasoa Razafy, Humberto Lugo, Luis Olmedo, Shohreh F Farzan
Changing weather patterns, droughts and competing water demands are dramatically altering the landscape and creating conditions conducive to the production of wind-blown dust and dust storms. In California, such factors are leading to the rapid shrinking of the Salton Sea, a 345 mile2 land-locked "sea" situated near the southeastern rural border region known as the Imperial Valley. The region is anticipated to experience a dramatic increase in wind-blown dust and existing studies suggest a significant impact on the health and quality of life for nearby residents of this predominantly low-income, Mexican-American community...
January 29, 2019: Science of the Total Environment
https://read.qxmd.com/read/30738227/explaining-virtual-water-trade-a-spatial-temporal-analysis-of-the-comparative-advantage-of-land-labor-and-water-in-china
#19
Dandan Zhao, Klaus Hubacek, Kuishuang Feng, Laixiang Sun, Junguo Liu
The well-known "virtual water hypothesis" states that water-deficient regions/countries could alleviate water stress through importing water-intensive products from water-abundant regions/countries. Although observed trading patterns do often not support this hypothesis, there is a lack of research to explore the reasons why trade patterns often do not support the intuitive virtual water hypothesis. To fill this important gap, we introduce comparative advantage theory in a quantitative way to track the driving forces of net virtual water export based on the spatial-temporal distribution of resource productivity and opportunity costs of land, labor and water use in agricultural and non-agricultural sectors across Chinese provinces between 1995 and 2015...
January 29, 2019: Water Research
https://read.qxmd.com/read/30737376/ecosystem-structural-changes-controlled-by-altered-rainfall-climatology-in-tropical-savannas
#20
Wenmin Zhang, Martin Brandt, Josep Penuelas, Françoise Guichard, Xiaoye Tong, Feng Tian, Rasmus Fensholt
Tropical savannas comprise mixed woodland grassland ecosystems in which trees and grasses compete for water resources thereby maintaining the spatial structuring of this ecosystem. A global change in rainfall climatology may impact the structure of tropical savanna ecosystems by favouring woody plants, relative to herbaceous vegetation. Here we analysed satellite data and observed a relatively higher increase in woody vegetation (5%) as compared to the increase in annual maximum leaf area index (LAImax , an indicator of the total green vegetation production) (3%) in arid and semi-arid savannas over recent decades...
February 8, 2019: Nature Communications
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