Abstract:
:Arsenic is highly toxic and therefore represents a potential threat to the environment and human health. The mobility and bioavailability of arsenic in soil is mostly controlled by adsorption and desorption reactions. Even though adsorption and traditional batch desorption experiments provide information about the environmental fate of As, the equilibrium conditions imposed in these studies would usually not be reached in the natural environment. Flow-through desorption techniques, where the desorbed species are removed from the substrate, can therefore be used to provide information about the rate and mechanisms of As desorption. The effect of pH on As adsorption reactions is relatively well understood; however, desorption of As and the effect of pH on As desorption remain unexplored. Desorption of As(V) (the most dominant arsenic species in aerated soils) was therefore investigated using batch and flow-through desorption experiments. Traditional batch desorption experiments underestimated the desorption rate of As(V) from kaolinite. The pH had a large effect on the amount of As(V) desorbed from kaolinite, with both an increase and a decrease in pH (from the initial pH 6.4) enhancing As(V) desorption. Modeling desorption over time revealed that the pH can influence As(V) desorption over extended periods of time.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Quaghebeur M,Rate A,Rengel Z,Hinz Csubject
Has Abstractpub_date
2005-03-01 00:00:00pages
479-86issue
2eissn
0047-2425issn
1537-2537pii
34/2/479journal_volume
34pub_type
杂志文章abstract::Trace elements (TEs) are universally present in environmental media, including soil, but agriculture uses some materials that have increased TE concentrations. Some TEs (e.g., Cu, Se, and Zn) are added to animal feeds to ensure animal health. Similarly, TEs are present in micronutrient fertilizers. In the case of phos...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0195
更新日期:2009-03-25 00:00:00
abstract::Loss of nitrate from agricultural lands to surface waters is an important issue, especially in areas that are extensively tile drained. To reduce these losses, a wide range of in-field and edge-of-field practices have been proposed, including constructed wetlands. We re-evaluated constructed wetlands established in 19...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2014.10.0415
更新日期:2015-05-01 00:00:00
abstract::Increasing chloride (Cl) concentration in soil solution has been shown to increase cadmium (Cd) concentration in soil solution and Cd uptake by plants, when grown in phosphate fertilizer- or biosolid-amended soils. However, previous experiments did not distinguish between the effect of Cl on biosolid-borne Cd compared...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.4960
更新日期:2004-03-01 00:00:00
abstract::Phosphorus (P) losses from nonpoint sources into surface water resources through surface runoff and tile drainage play a significant role in eutrophication. Accordingly, the number of studies involving the modeling of agricultural P losses, the uncertainties of such models, and the best management practices (BMPs) sup...
journal_title:Journal of environmental quality
pub_type: 杂志文章,评审
doi:10.1002/jeq2.20109
更新日期:2020-09-01 00:00:00
abstract::Agricultural P losses are a global economic and water quality concern. Much of the current understanding of P dynamics in agricultural systems has been obtained from rainfall-driven runoff, and less is known about cold-season processes. An improved understanding of the magnitude, form, and transport flow paths of P lo...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.11.0418
更新日期:2019-07-01 00:00:00
abstract::Intensification of pastoral dairy systems often means more nitrogen (N) leaching. A number of mitigation strategies have been proposed to reduce or reverse this trend. The main strategies focus on reducing the urinary N load onto pastures or reducing the rate of nitrification once the urine has been deposited. Restric...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2016.08.0325
更新日期:2017-01-01 00:00:00
abstract::A microplate method was developed as a tool to test phages for their ability to control Salmonella in aqueous environments. The method used EPA (U.S. Environmental Protection Agency) worst case water (WCW) in 96-well plates. The WCW provided a consistent and relatively simple defined turbid aqueous matrix, high in tot...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0019
更新日期:2008-01-04 00:00:00
abstract::Microbial mineralization of urea and uric acid in poultry litter results in the production of ammonia, which can lead to decreased poultry performance, malodorous emissions, and loss of poultry litter value as a fertilizer. Despite the fact that this is a microbial process, little is known about how the microbial popu...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0024
更新日期:2008-10-23 00:00:00
abstract::Increased use of neonicotinoid-coated crop seeds introduces greater amounts of insecticides into the environment, where they are vulnerable to transport. To understand the transport of neonicotinoids from agricultural fields, we planted maize seeds coated with thiamethoxam in lysimeter plots in central Pennsylvania, U...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20185
更新日期:2020-12-23 00:00:00
abstract::Growing nitrogen (N) catch crops can reduce NO(3)-N leaching after cultivating cereals. The objective of this study was to relate NO(3)-N leaching to variation in the uptake of N and the size and distribution of the root systems of different catch crops species. In a 3-yr lysimeter experiment, phacelia (Phacelia tanac...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0306
更新日期:2010-04-13 00:00:00
abstract::Long-term application of phosphorus (P) with animal manure in amounts exceeding removal with crops leads to buildup of P in soil and to increasing risk of P loss to surface water and eutrophication. In most manures, the majority of P is held within inorganic forms, but in soil leachates organic P forms often dominate....
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0131
更新日期:2007-01-09 00:00:00
abstract::Agricultural nutrient management is an issue due to P loss from fields and water quality degradation. This is especially true in watersheds where a history of P application in excess of crop needs has resulted in elevated soil P (legacy P). As practices and policy are implemented in such watersheds to reduce P loss, i...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2017.12.0481
更新日期:2018-05-01 00:00:00
abstract::Quantitative polymerase chain reaction (qPCR) was used by the USEPA to establish new recreational water quality criteria in 2012 using the indicator bacteria enterococci. The application of this method has been limited, but resource managers are interested in more timely monitoring results. In this study, we evaluated...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2017.11.0462
更新日期:2018-09-01 00:00:00
abstract::Human activities have caused toxic metal pollution and ecological risks to agricultural soil. In this study, 291 topsoil samples, collected in the agricultural soil system of Yuzhong, China, were selected to study the toxic metals and metalloids contamination characteristics, source and ecological risk based on geosta...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20163
更新日期:2020-10-01 00:00:00
abstract::Whole-cell bacterial biosensors (bioreporters) are commonly applied for determination of metal toxicity and bioavailability in environmental samples. This is accomplished using a standard procedure whereby the sample is mixed with bioreporter cells suspended in a buffered medium at a fixed pH (set-point pH assay). Thi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.10.0352
更新日期:2019-01-01 00:00:00
abstract::Phosphorus is among the essential nutrients applied to sugarcane ( L.) fields in the form of a fertilizer mixture (N, P, and K) in southwestern Florida. Sorption coefficient is used for modeling P movement, and in this study, we hypothesized that the sorption coefficient determined using fertilizer mixture (N, P, and ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2016.03.0087
更新日期:2016-09-01 00:00:00
abstract::Synthetic nitrogen fertilizer has been a double-edged sword, greatly improving human nutrition during the 20th century but also posing major human health and environmental challenges for the 21st century. In August 2013, about 160 agronomists, scientists, extension agents, crop advisors, economists, social scientists,...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.02.0078
更新日期:2015-03-01 00:00:00
abstract::The increase in endocrine-disrupting compounds in the environment has generated research focused on the behavior of these compounds in natural soil and water ecosystems. To understand how estrogens behave in the soil environment as a result of 25+ yr of wastewater irrigation, soils from Penn State's "Living Filter" wa...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2014.04.0153
更新日期:2014-11-01 00:00:00
abstract::Treatment of liquid swine manure (LSM) offers opportunities to improve manure nutrient management. However, N2O fluxes and cumulative emissions resulting from application of treated LSM are not well documented. Nitrous oxide emissions were monitored following band-incorporation of 100 kg N ha(-1) of either mineral fer...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0482
更新日期:2010-09-01 00:00:00
abstract::Place-based resource management, such as watershed or ecosystem management, is being promoted to replace the media-focused approach for achieving water quality protection. We monitored the agricultural area of a 740-ha watershed to determine the nature and scale of farm material transfers, N and P balances, and farmer...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2003.5620
更新日期:2003-03-01 00:00:00
abstract::Determining the survival of zoonotic pathogens in livestock manure and runoff is critical for understanding the environmental and public health risks associated with these wastes. The occurrence and persistence of the bacterial pathogens Escherichia coli O157:H7 and Campylobacter spp. in a passive beef cattle feedlot ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0100
更新日期:2007-10-24 00:00:00
abstract::The advent of real-time, short-term farm management tools is motivated by the need to protect water quality above and beyond the general guidance offered by existing nutrient management plans. Advances in high-performance computing and hydrologic or climate modeling have enabled rapid dissemination of real-time inform...
journal_title:Journal of environmental quality
pub_type: 杂志文章,评审
doi:10.2134/jeq2016.09.0377
更新日期:2017-11-01 00:00:00
abstract::Phosphorus transport from agricultural soils contributes to eutrophication of fresh waters. Computer modeling can help identify agricultural areas with high potential P transport. Most models use a constant extraction coefficient (i.e., the slope of the linear regression between filterable reactive phosphorus [FRP] in...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0572
更新日期:2005-03-01 00:00:00
abstract::Copper sulfate (CuSO4) is applied periodically to commercial channel catfish (Ictalurus panctatus) ponds as an algicide or parasiticide. Current understanding of the chemistry of copper in soil-water systems suggests that copper may accumulate in pond sediments, although the forms and potential bioavailability of copp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.303912x
更新日期:2001-05-01 00:00:00
abstract::The purpose of this study was to determine the effect of PO on the sorption and transport of glyphosate [-(phosphonomethyl) glycine, GPS] in soils. The results of batch experiments indicated significant competition between PO and GPS in two different soils, with PO being preferentially sorbed. The 24-h Freundlich part...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.06.0252
更新日期:2019-01-01 00:00:00
abstract::Phosphorus losses from agricultural soils is an important source of P in surface waters leading to surface water quality impairment. In addition to reducing P inputs, mitigation measures are needed to reduce P enrichment of surface waters. Because drainage of agricultural land by pipe drainage is an important pathway ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2012.0344
更新日期:2013-01-01 00:00:00
abstract::Pesticides are responsible for nearly 1900 water quality impairments in the United States. Impacts of pesticide runoff on aquatic ecosystems can be mitigated by implementing management practices such as constructed wetlands, grass buffers, and vegetated ditches. A new practice currently being examined is the use of ri...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.04.0154
更新日期:2018-11-01 00:00:00
abstract::The aim of this study was to assess the influence of the polycyclic aromatic hydrocarbons (PAH)-degrading activity in the fate of fluoranthene in soils. Three soil samples with different degrading activities (an industrial soil, the same industrial soil after biostimulation, and an agricultural soil) were spiked with ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0473
更新日期:2007-08-31 00:00:00
abstract::Denitrifying bioreactors using woodchips or other slow-release carbon sources can be an effective method for removing nitrate (NO) from wastewater and tile drainage. However, the ability of these systems to remove fecal microbes from wastewater has been largely uninvestigated. In this study, reductions in fecal indica...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.06.0326
更新日期:2016-05-01 00:00:00
abstract::The potential excessive nutrient and/or microbial loading from mismanaged land application of organic fertilizers is forcing changes in animal waste management. Currently, it is not clear to what extent different rates of poultry litter impact soil microbial communities, which control nutrient availability, organic ma...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0470
更新日期:2006-07-06 00:00:00