Abstract:
:The groundwater of Jeju Island (Republic of Korea) is vulnerable to contamination because its aquifers are mainly composed of highly permeable geological units and its agricultural fields are often exposed to excessive use of predominantly synthetic fertilizers. In the Gosan area of Jeju Island, we investigated nitrate contamination in both a perched aquifer above an impermeable clay bed and the regional groundwater beneath this aquitard. The δO and δD values indicate that the perched groundwater is recharged by local precipitation, whereas the regional groundwater is recharged mainly by regional flow from an adjacent mountainous region. The perched groundwater contained very high NO-N concentrations of up to 87 mg/L. The isotopic composition of nitrate in the perched groundwater showed that synthetic fertilizers applied in high excesses of crop N needs were the main cause of aquifer pollution. Elevated nitrate concentrations were also observed in the regional groundwater especially after precipitation events. Concentration and isotopic data revealed that the inflow of shallow perched groundwater along the poorly cemented or uncemented annulus of regional groundwater wells was one of the main reasons for the nitrate contamination observed in the regional groundwater. In both aquifers, δN and δO values showed that the sources of nitrate were derived from synthetic fertilizers that had been recycled in the soil zone by nitrification and in some portions of the perched aquifer (dissolved oxygen concentrations <2 mg/L) indicated that denitrification occurred locally.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Koh EH,Kaown D,Mayer B,Kang BR,Moon HS,Lee KKdoi
10.2134/jeq2011.0417subject
Has Abstractpub_date
2012-11-01 00:00:00pages
1835-45issue
6eissn
0047-2425issn
1537-2537journal_volume
41pub_type
杂志文章abstract::The enrichment of P in surface waters has been linked to P runoff from agricultural fields amended with fertilizers. Novel slow-release mineral fertilizers, such as struvite and P-exchanged layered double hydroxides (LDHs), have received increasing attention for P recycling from waste streams, and these fertilizers ma...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2017.07.0282
更新日期:2018-03-01 00:00:00
abstract::Glyphosate (N-phosphonometylglycine) is widely used due to its broad spectrum of activity and nonselective mode of action. In Chile it is the most used herbicide, but its adsorption behavior in the abundant and widespread variable charge soils is not well understood. In this study, three volcanic ash-derived soils wer...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0146
更新日期:2009-05-20 00:00:00
abstract::Wildfire has been shown to increase the short-term (1-3 yr) mobilization of mineral N and P in forest ecosystems of the Sierra Nevada Mountains and Lake Tahoe Basin. The ensuing effects on tributary and lake water quality are uncertain. The purpose of this investigation was to assess the impacts on runoff water qualit...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2012.0472
更新日期:2013-07-01 00:00:00
abstract::Polyacrylamide (PAM) treatment of irrigation water is a growing conservation technology in irrigated agriculture in recent years. There is a concern regarding the environmental impact of PAM after its application. The effects of anionic PAM on the sorption characteristics of four widely used herbicides (metolachlor, a...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.1226
更新日期:2002-07-01 00:00:00
abstract::Although many studies have pointed out the various controlling factors of sediment and nutrient delivery on a plot or watershed scale, little is known on the spatial variability of sediment and nutrient delivery on a regional scale. This study was conducted to reveal regional variations in sediment-associated nutrient...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.8700
更新日期:2002-05-01 00:00:00
abstract::The influence of biochar on nitrogen (N) transformation processes in soil is not fully understood. This study assessed the influence of four biochars (wood and poultry manure biochars synthesized at 400 degrees C, nonactivated, and at 550 degrees C, activated, abbreviated as: W400, PM400, W550, PM550, respectively) on...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0138
更新日期:2010-07-01 00:00:00
abstract::Roadside vegetation provides a multitude of ecosystem services, including pollutant remediation, runoff reduction, wildlife habitat, and aesthetic scenery. Establishment of permanent vegetation along paved roads after construction can be challenging, particularly within 1 m of the pavement. Adverse soil conditions cou...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20184
更新日期:2020-12-10 00:00:00
abstract::Phosphogypsum (PG), a by-product of the phosphate fertilizer industry, reduces N losses when added to composting livestock manure, but its impact on greenhouse gas emissions is unclear. The objective of this research was to assess the effects of PG addition on greenhouse gas emissions during cattle feedlot manure comp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0388
更新日期:2005-04-20 00:00:00
abstract::Closed chambers used to measure soil-atmosphere exchange of trace gases including nitrous oxide (N(2)O) and carbon dioxide (CO(2)) generate errors due to suppression of the gas concentration gradient at the soil-atmosphere interface. A method is described here for estimating the magnitude of flux underestimation arisi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0231
更新日期:2009-12-30 00:00:00
abstract::Vegetated filter strips (VFS) have become an important component of water quality improvement by reducing sediment and nutrients transport to surface water. This management practice is also beneficial for controlling manure-borne pathogen transport to surface water. The objective of this work was to assess the VFS eff...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0328
更新日期:2009-06-23 00:00:00
abstract::Bioalkylation and colloid formation of selenium during selenate removal in upflow anaerobic sludge bed (UASB) bioreactors was investigated. The mesophilic (30 degrees C) UASB reactor (pH = 7.0) was operated for 175 d with lactate as electron donor at an organic loading rate of 2 g COD L(-1) d(-1) and a selenium loadin...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0630
更新日期:2008-08-08 00:00:00
abstract::DIMBOA (3,4-dihydro-2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3-one), a major benzoxazinone of Poaceae plants, was isolated and purified from corn seedlings. The effect of isolated and purified DIMBOA on the degradation of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine], and its toxic breakdown produc...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0409
更新日期:2005-11-07 00:00:00
abstract::Soil concentrations and degradation rates of methyl isothio-cyanate (MITC), chloropicrin (CP), 1,3-dichloropropene (1,3-D), and dimethyl disulfide (DMDS) were determined under fumigant application scenarios representative of commercial raised bed, plastic mulched vegetable production systems. Five days after applicati...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0494
更新日期:2011-07-01 00:00:00
abstract::Pollen released by urban flora-a major contributor to airborne allergen content during the pollen season-has a considerable adverse impact on human health. Using aerobiological techniques to sample and characterize airborne biological particulate matter (BPM), we can identify the main species contributing to the polle...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.02.0075
更新日期:2016-01-01 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::A lignocellulosic substrate (LS) obtained from our local agroindustry was used as a low-cost and effective adsorbent for the removal of pesticides from wastewaters. The studied pesticides were terbumeton (N-(1,1-dimethyl)-Nethyl-6-methoxy-1,3,5-triazine-2,4-diamine), desethyl terbumeton (N-(1,1-dimethylethyl)-6-methox...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0332
更新日期:2008-03-01 00:00:00
abstract::Land application of co-produced waters from coalbed natural gas (CBNG) wells is one management option used in the Powder River Basin (PRB) of Wyoming and Montana. Unfortunately, the co-produced CBNG waters may be saline and/or sodic. The objective of this study was to examine the effects of irrigation with CBNG waters...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0442
更新日期:2008-09-01 00:00:00
abstract::Broiler litter contains 17β-estradiol, estrone, and testosterone, which can contaminate surface waters when surface applied to grasslands and no-till fields. The objective of this study was to evaluate the effects of litter type (full or cake cleanout), litter treatment (none or sodium bisulfate), and number of flocks...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2017.08.0301
更新日期:2018-01-01 00:00:00
abstract::The introduction of portable in situ ultraviolet-visual spectrometers has made possible the collection of water quality parameters at a high frequency in dynamic systems such as tidal marshes. The usefulness of this technology is inhibited by fouling of the instrument's optics. In this study, a spectrometer fitted wit...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2013.02.0049
更新日期:2013-11-01 00:00:00
abstract::Calcium superphosphate and apple ( Mill.) waste can be used for controlling N loss and improving compost quality during composting, whereas integrated addition of the two additives on composting process remains unexplored. Therefore, this study was conducted to investigate the effects of combined use of calcium superp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.11.0397
更新日期:2019-09-01 00:00:00
abstract::Annual and multiyear records of trace element deposition are difficult to develop using monitoring systems but have proven feasible using plant material in several settings. Here, we used material from several tree species (Populus deltoides W. Bartram ex Marshall, Platanus occidentalis L., and Ginkgo biloba L.) to de...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20009
更新日期:2020-01-01 00:00:00
abstract::Nutrient management plans (NMPs) for application of wastewater from concentrated animal feeding operations are designed to meet crop water and nutrient requirements, but implicitly assume that pathogenic microorganisms in the wastewater will be retained and die-off in the root zone. A NMP was implemented on a field pl...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0428
更新日期:2009-06-23 00:00:00
abstract::A field study was initiated in 1992 to investigate the long-term impacts of beef feedlot manure application (composted and uncomposted) on nutrient accumulation and movement in soil, corn silage yield, and nutrient uptake. Two application strategies were compared: providing the annual crop nitrogen (N) requirement (N-...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0363
更新日期:2005-08-09 00:00:00
abstract::Micro-X-ray fluorescence (micro-XRF) microprobe analysis and micro-X-ray absorption near-edge structure (micro-XANES) spectroscopy were employed to identify Fe and Mn phases and their association with selected metals in two biosolids (limed composted [LC] and Nu-Earth) before and after treatment to remove organic carb...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0259
更新日期:2006-01-05 00:00:00
abstract::Soil spatial variability has a profound influence on most agronomic and environmental processes at field and landscape scales, including site-specific management, vadose zone hydrology and transport, and soil quality. Mobile sensors are a practical means of mapping spatial variability because their measurements serve ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.09.0458
更新日期:2016-07-01 00:00:00
abstract::Incorporation of manure into cultivated soils is generally recommended to minimize nutrient losses. A 3-yr study was conducted to evaluate sediment and nutrient losses with different tillage methods (moldboard plow, heavy-duty cultivator, double disk, and no-incorporation) for incorporation of beef cattle manure in a ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0056
更新日期:2005-09-08 00:00:00
abstract::Bedding materials may affect air quality in livestock facilities. Our objective in this study was to compare headspace concentrations of ammonia (NH), total reduced sulfides (TRS), carbon dioxide (CO), methane (CH), and nitrous oxide (NO) when pine wood chips ( spp.) and corn stover ( L.) were mixed in various ratios ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.09.0466
更新日期:2016-03-01 00:00:00
abstract::The widespread use of chromium (Cr) has a deleterious impact on the environment. A number of pathways, both biotic and abiotic in character, determine the fate and speciation of Cr in soils. Chromium exists in two predominant species in the environment: trivalent [(Cr(III)] and hexavalent [Cr(VI)]. Of these two forms,...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2011.0145
更新日期:2012-07-01 00:00:00
abstract::Man has land-applied societal nonhazardous wastes for centuries as a means of disposal and to improve the soil via the recycling of nutrients and the addition of organic matter. Nonhazardous wastes include a vast array of materials, including manures, biosolids, composts, wastewater effluents, food-processing wastes, ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0007
更新日期:2005-01-01 00:00:00
abstract::A lysimeter trench was established at the Gardermoen delta (50 km north of Oslo, Norway) to study the flow of water and transport and degradation of aromatic jet fuel components (toluene and o-xylene) in the undisturbed unsaturated zone. Site investigations with ground-penetrating radar revealed the presence of dippin...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.1809
更新日期:2002-11-01 00:00:00