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https://www.readbyqxmd.com/read/28214327/improved-exposure-estimation-in-soil-screening-and-clean-up-criteria-for-volatile-organic-chemicals
#1
George E DeVaull
Soil clean-up criteria define acceptable concentrations of organic chemical constituents for exposed humans. These criteria sum the estimated soil exposure over multiple pathways. Assumptions for ingestion, dermal contact, and dust exposure generally presume a chemical persists in surface soils at a constant concentration level for the entire exposure duration. For volatile chemicals this is an unrealistic assumption. A calculation method is presented for surficial soil criteria which include volatile depletion of chemical for these uptake pathways...
February 18, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28214191/potential-of-different-am-fungi-native-from-as-contaminated-and-uncontaminated-soils-for-supporting-leucaena-leucocephala-growth-in-as-contaminated-soil
#2
Jerusa Schneider, Jochen Bundschuh, Wesley de Melo Rangel, Luiz Roberto Guimarães Guilherme
Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm(-3)) in a Typic Quartzipsamment soil...
February 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28214179/mixture-toxicity-of-flubendazole-and-fenbendazole-to-daphnia-magna
#3
Alan Puckowski, Stefan Stolte, Marta Wagil, Marta Markiewicz, Paulina Łukaszewicz, Piotr Stepnowski, Anna Białk-Bielińska
Nowadays, residual amounts of many pharmaceuticals can be found in various environmental compartments including surface and ground waters, soils and sediments as well as biota. Even though they undergo degradability, their environmental discharge is relatively continuous, thus they may be regarded as quasi-persistent contaminants, and are also frequently regarded as emerging organic pollutants. Benzimidazoles, especially flubendazole (FLU) and fenbendazole (FEN), represent two anthelmintic drugs belonging to this group...
February 3, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28214125/advanced-technologies-for-the-remediation-of-pesticide-contaminated-soils
#4
REVIEW
E Morillo, J Villaverde
The occurrence of pesticides in soil has become a highly significant environmental problem, which has been increased by the vast use of pesticides worldwide and the absence of remediation technologies that have been tested at full-scale. The aim of this review is to give an overview on technologies really studied and/or developed during the last years for remediation of soils contaminated by pesticides. Depending on the nature of the decontamination process, these techniques have been included into three categories: containment-immobilization, separation or destruction...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214123/a-tool-for-cost-effectiveness-analysis-of-field-scale-sediment-bound-phosphorus-mitigation-measures-and-application-to-analysis-of-spatial-and-temporal-targeting-in-the-lunan-water-catchment-scotland
#5
Andy Vinten, James Sample, Adekunle Ibiyemi, Yakubu Abdul-Salam, Marc Stutter
The cost-effectiveness of six edge-of-field measures for mitigating diffuse pollution from sediment bound phosphorus (P) runoff from temperate arable farmland is analysed at catchment/field scales. These measures were: buffer strips, permanent grassland in the lowest 7% of arable fields, dry detention bunds, wetlands, and temporary barriers such as sediment fences. Baseline field P export was estimated using export coefficients (low risk crops) or a modified Universal Soil Loss Equation (high risk crops). The impact of measures was estimated using simple equations...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214122/anaerobic-co-digestion-of-recalcitrant-agricultural-wastes-characterizing-of-biochemical-parameters-of-digestate-and-its-impacts-on-soil-ecosystem
#6
Adele Muscolo, Giovanna Settineri, Teresa Papalia, Emilio Attinà, Carmelo Basile, Maria Rosaria Panuccio
Anaerobic digestion (AD) of organic wastes is a promising alternative to landfilling for reducing Greenhouse Gas Emission (GHG) and it is encouraged by current regulation in Europe. Biogas-AD produced, represents a useful source of green energy, while its by-product (digestate) is a waste, that needs to be safely disposal. The sustainability of anaerobic digestion plants partly depends on the management of their digestion residues. This study has been focused on the environmental and economic benefits of co-digest recalcitrant agricultural wastes such olive wastes and citrus pulp, in combination with livestock wastes, straw and cheese whey for biogas production...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214121/a-molecular-zoom-into-soil-humeome-by-a-direct-sequential-chemical-fractionation-of-soil
#7
Marios Drosos, Antonio Nebbioso, Pierluigi Mazzei, Giovanni Vinci, Riccardo Spaccini, Alessandro Piccolo
A Humeomics sequential chemical fractionation coupled to advanced analytical identification was applied directly to soil for the first time. Humeomics extracted ~235% more soil organic carbon (SOC) than by the total alkaline extraction traditionally employed to solubilise soil humic molecules (soil Humeome). Seven fractions of either hydro- or organo-soluble components and a final unextractable humic residue were separated from soil. These materials enabled an unprecedented structural identification of solubilised heterogeneous humic molecules by combining NMR, GC-MS, and ESI-Orbitrap-MS...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214114/effects-of-salvage-logging-on-soil-properties-and-vegetation-recovery-in-a-fire-affected-mediterranean-forest-a-two-year-monitoring-research
#8
F García-Orenes, V Arcenegui, K Chrenková, J Mataix-Solera, J Moltó, A B Jara-Navarro, M P Torres
Post-fire management can have an additional impact on the ecosystem; in some cases, even more severe than the fire. Salvage logging (SL) is a common practice in most fire-affected areas. The management of burnt wood can determine microclimatic conditions and seriously affect soil properties. In some cases, the way of doing it, using heavy machinery, and the vulnerability of soils to erosion and degradation can make this management potentially aggressive to soil. Research was done in "Sierra de Mariola Natural Park" (E Spain)...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214113/classification-and-assessment-models-of-first-year-byproducts-nitrogen-plant-availability-from-literature-data
#9
Claude-Alla Joseph, Lotfi Khiari, Jacques Gallichand, Sidki Bouslama
Byproducts can provide an important amount of nutrients for crops and improve soils properties. According to their C/N, nitrogen (N) mineralization or immobilization may be observed after their application onto agricultural land. Therefore, an indicator is needed to assess byproducts N availability for crops. Thirty-seven studies from the scientific literature on N mineralization or immobilization after application to agricultural land under a wide range of climatic and experimental conditions were collected in order to elaborate models assessing non-composted byproducts N availability during the first growing season according to the C/N ratio...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214111/remediation-of-contaminated-lands-in-the-niger-delta-nigeria-prospects-and-challenges
#10
REVIEW
Nenibarini Zabbey, Kabari Sam, Adaugo Trinitas Onyebuchi
Contamination of the total environment (air, soil, water and biota) by crude oil has become a paramount interest in the Niger Delta region of Nigeria. Studies have revealed variable impacts of oil toxicity on the environment and exposed populations. The revelation gained much international attention in 2011 with the release of Environmental Assessment of Ogoniland report by the United Nations Environment Programme (UNEP). This has up scaled local and international pressures for urgent clean-up and restoration of degraded bio-resource rich environments of the Niger Delta, starting from Ogoniland...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214058/phylogenetic-multilocus-sequence-analysis-of-indigenous-slow-growing-rhizobia-nodulating-cowpea-vigna-unguiculata-l-in-greece
#11
Anastasia P Tampakaki, Christos T Fotiadis, Georgia Ntatsi, Dimitrios Savvas
Cowpea (Vigna unguiculata) is a promiscuous grain legume, capable of establishing efficient symbiosis with diverse symbiotic bacteria, mainly slow-growing rhizobial species belonging to the genus Bradyrhizobium. Although much research has been done on cowpea-nodulating bacteria in various countries around the world, little is known about the genetic and symbiotic diversity of indigenous cowpea rhizobia in European soils. In the present study, the genetic and symbiotic diversity of indigenous rhizobia isolated from field-grown cowpea nodules in three geographically different Greek regions were studied...
February 2, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28213920/potato-aphid-macrosiphum-euphorbiae-performance-is-determined-by-aphid-genotype-and-not-mycorrhizal-fungi-or-water-availability
#12
Alison Jane Karley, Matthew Emslie-Smith, Alison Elizabeth Bennett
Intra- and inter-specific variation in plant and insect traits can alter the strength and direction of insect-plant interactions, with outcomes modified by soil biotic and abiotic conditions. We used the potato aphid (Macrosiphum euphorbiae Thomas) feeding on cultivated S. tuberosum and wild S. berthaulti to study the impact of water availability and plant mutualistic arbuscular mycorrhizal (AM) fungi on aphid performance and susceptibility to a parasitoid wasp (Aphidius ervi Haliday). Plants were grown under glass with live or sterile AM fungal spores and supplied with sufficient or reduced water supply...
February 18, 2017: Insect Science
https://www.readbyqxmd.com/read/28213721/effect-of-chemical-amendments-on-remediation-of-potentially-toxic-trace-elements-ptes-and-soil-quality-improvement-in-paddy-fields
#13
Sung Chul Kim, Young Kyu Hong, Se Jin Oh, Seung Min Oh, Sang Phil Lee, Do Hyung Kim, Jae E Yang
Remediation of potentially toxic trace elements (PTEs) in paddy fields is fundamental for crop safety. In situ application of chemical amendments has been widely adapted because of its cost-effectiveness and environmental safety. The main purpose of this research was to (1) evaluate the reduction in dissolved concentrations of cadmium (Cd) and arsenic (As) with the application of chemical amendments and (2) monitor microbial activity in the soil to determine the remediation efficiency. Three different chemical amendments, lime stone, steel slag, and acid mine drainage sludge, were applied to paddy fields, and rice (Oryza sativa L...
February 17, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28213706/plant-microbial-association-in-petroleum-and-gas-exploration-sites-in-the-state-of-assam-north-east-india-significance-for-bioremediation
#14
Hemen Sarma, N F Islam, M N V Prasad
The state of Assam in north-east India gained popularity in Asia because of discovery of oil. Pollution due to petroleum and gas exploration is a serious problem in Assam. Oil and gas exploration by various agencies in Assam resulted in soil pollution due to hydrocarbons (HCs) and heavy metals (HMs). Bioremediation gained considerable significance in addressing petroleum hydrocarbon polluted sites in various parts of the world. In this investigation, we have observed 15 species of plants belonging to grass growing on the contaminated soils...
February 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28213705/responses-of-soil-methanogens-methanotrophs-and-methane-fluxes-to-land-use-conversion-and-fertilization-in-a-hilly-red-soil-region-of-southern-china
#15
Huifeng Liu, Xing Wu, Zongshan Li, Qing Wang, Dan Liu, Guohua Liu
Changes in land-uses and fertilization are important factors regulating methane (CH4) emissions from paddy soils. However, the responses of soil CH4 emissions to these factors and the underlying mechanisms remain unclear. The objective of this study was to explore the effects of land-use conversion from paddies to orchards and fertilization on soil CH4 fluxes, and the abundance and community compositions of methanogens and methanotrophs. Soil CH4 fluxes were quantified by static chamber and gas chromatography technology...
February 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28213542/plant-community-and-nitrogen-deposition-as-drivers-of-%C3%AE-and-%C3%AE-prokaryotic-diversity-in-reconstructed-oil-sands-soils-and-natural-boreal-forest-soils
#16
Jacynthe Masse, Cindy E Prescott, Sébastien Renaut, Yves Terrat, Sue J Grayston
The Athabasca Oil Sands deposit is one of the largest single oil deposits in the world. Following surface mining, companies are required to restore soil-like profiles that can support the previous land capabilities. The objective of this study was to assess if soil prokaryotic α- and β-diversity in oil-sands soils reconstructed 20-30 years previously, and planted to one of three vegetation types (coniferous or deciduous trees and grassland) were similar to those found in natural boreal-forest soils subject to wildfire disturbance...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28213323/growth-inhibition-and-efficiency-of-the-antioxidant-system-in-spring-barley-and-common-radish-grown-on-soil-polluted-ionic-liquids-with-iodide-anions
#17
Robert Biczak, Martyna Śnioszek, Arkadiusz Telesiński, Barbara Pawłowska
Ionic liquids (ILs) constitute a huge group of substances that are increasingly common in the commercial use. This situation may lead to the contamination of the soil environment which being the basic of plants vegetation. This paper presents the effect of four ILs with I(-) anion on the growth and development of spring barley (Hordeum vulgare) and common radish (Raphanus sativus L. subvar. radicula Pers) and changes in metabolism of the plants. Seedlings of spring barley and common radish cultivated on soil with increasing ILs concentration exhibited typical phytotoxicity symptoms...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28213322/study-of-processes-influencing-bioavailability-of-pesticides-in-wood-soil-systems-effect-of-different-factors
#18
J M Marín-Benito, E Herrero-Hernández, M S Rodríguez-Cruz, M Arienzo, M J Sánchez-Martín
Lignocellulosic wastes and by-products containing lignin are now available in large amounts from forestry and industrial activities, and could be promising organic materials for the biosorption of pesticides by soils in order to reduce point-source pollution. Adding these materials to soil requires understanding the process of pesticide sorption-desorption by wood-soils, as sorption capacity could increase, with changes in pesticide bioavailability and final fate. The objective of this work was to study the effect that pine and oak wood added to soils had on the sorption/desorption of the pesticides linuron, alachlor, and metalaxyl...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28213306/phosphorous-extractability-and-ryegrass-availability-from-bio-waste-composts-in-a-calcareous-soil
#19
Marco Grigatti, Elisa Boanini, Silvia Mancarella, Andrea Simoni, Massimo Centemero, Adrie H M Veeken
In this work four stable bio-waste composts (C1, C2, C3, C4) were selected on the basis of their increasing water soluble P (H2O-P). The P speciation was assessed via sequential chemical extraction (SCE) on the same products. Moreover, the plant-available P was assessed via apparent recovery fraction approach (ARF) in a pot test on ryegrass over 21 weeks at 15 mg P kg(-)(1) of soil. An inorganic P source (P-chem) was added as a reference at the same P rate in addition to a non-fertilized control (Control)...
February 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28213297/retention-of-silver-nano-particles-and-silver-ions-in-calcareous-soils-influence-of-soil-properties
#20
Samaneh Rahmatpour, Mehran Shirvani, Mohammad R Mosaddeghi, Mehdi Bazarganipour
The rapid production and application of silver nanoparticles (AgNPs) have led to significant release of AgNPs into the terrestrial environments. Once released into the soil, AgNPs could enter into different interactions with soil particles which play key roles in controlling the fate and transport of these nanoparticles. In spite of that, experimental studies on the retention of AgNPs in soils are very scarce. Hence, the key objective of this research was to find out the retention behavior of AgNPs and Ag(I) ions in a range of calcareous soils...
February 14, 2017: Journal of Environmental Management
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