Abstract:
:The clay soil in the middle and lower reaches of the Yangtze River in China is widely distributed and the groundwater table is shallow. In order to accurately analyze the distribution and assess the potentially harmful effects of the pollutants in this region, it's necessary to study the diffusion rate and subsequent concentrations of organic pollutants. Our study area, located in Kunshan in the Jiangsu Province, represents a typical contaminated site consisting of a silty clay layer located in a shallow water table. Our model for the horizontal diffusion, vertical diffusion, and concentration distribution of organic pollutants through this clay layer over 30 years. The simulation results were compared to the measured horizontal distribution of the pollutant concentration at a depth of 2 m and the electrical resistivity tomography data reflecting the longitudinal changes in the polluted area. Our model generated accurate pollutant concentration and diffusion depth results, but the modelled horizontal diffusion distance of the pollution plume did not agree with observational data. After increasing the soil permeability coefficient at a depth of 2 m by a factor of 20,000, the numerical simulation results more closely match those of the measured results. Based on model results, we propose that the seasonal fluctuation of the groundwater table controls the vertical diffusion distance, and that the wide horizontal pollutant diffusion distance is a consequence of the sharp increase in the cohesive soil permeability (caused by repeated water gain and loss).
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Gao C,Guo X,Shao S,Wu Jdoi
10.1080/09593330.2020.1767699subject
Has Abstractpub_date
2020-05-23 00:00:00pages
1-10eissn
0959-3330issn
1479-487Xpub_type
杂志文章abstract::Lead is a heavy metal considered highly toxic, responsible for causing several health problems as well as being extremely harmful to fauna and flora. Given this fact, several techniques have been studied for the removal of this metal from contaminated water, in which stands out adsorption. In this sense, the objective...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2017.1290150
更新日期:2017-12-01 00:00:00
abstract::In the north of Marrakesh (Morocco), the high anthropogenic activity and the permeable nature of the geological ground makes the water of Jbilet vulnerable to contamination. The results of physico-chemical analyses conducted in 2006 showed that two groups of wells could be distinguished. Groundwater of wells located o...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330802180237
更新日期:2008-11-01 00:00:00
abstract::This study is a first-hand report of the immobilization of Nauclea diderrichii seed waste biomass (ND) (an agro-waste) with eco-friendly mesoporous silica (MS) and graphene oxide-MS (GO + MS) nanoparticles, producing two new hybrid materials namely: MND adsorbent for agro-waste modified with MS and GND adsorbent for a...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2013.839747
更新日期:2014-03-01 00:00:00
abstract::Sediment borne pesticides are one of the major routes of transport of pesticides into the aquatic environment and could affect biota living closely in contact with it. Sediment residues of DDT were found to be easily adsorbed (95.0%) and were released in hard water (8.4%) and seawater (0.1%). DDT and DDE sediment resi...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332308618318
更新日期:2002-11-01 00:00:00
abstract::The paper mainly focused on illustrating the merit of respirometric analysis in assessing the inhibitory/toxic impact of xenobiotics on substrate biodegradation. It also evaluated biodegradation characteristics of these chemicals at continuous exposure through acclimation ofthe microbial culture. The nature and role o...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.655323
更新日期:2012-07-01 00:00:00
abstract::Carbon-coated TiO2 powders were prepared from the mixtures of anatase (ST-01) and carbon precursor poly(vinyl alcohol) in different ratios by carbonization at 900 degrees C in a flow of either Ar or N2. Carbon-coated TiQ2 thus prepared was either fixed on an adhesive tape or formed into a film by using the organic bin...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332808618669
更新日期:2006-05-01 00:00:00
abstract::Biological nutrient removal (BNR) in municipal wastewater treatment to remove carbonaceous substrates and nutrients, has recently become increasingly popular worldwide due to increasingly stringent regulations. Biological fluidized bed (BFB) technology, which could be potentially used for BNR, can provide some advanta...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2004.9619360
更新日期:2004-06-01 00:00:00
abstract::Biomass concentrator reactors (BCRs) are an alternative wastewater treatment technology developed as a possible solution to membrane bioreactors' (MBRs) high construction and energetic costs. BCRs are an alternative based on the same principle of biomass retention, using a coarser filter medium instead of a membrane. ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2017.1410581
更新日期:2019-03-01 00:00:00
abstract::Lipase production by Staphylococcus xylosus and Rhizopus oryzae was investigated using a culture medium based on a mixture of synthetic medium and supernatants generated from tuna by-products and Ulva rigida biomass. The proportion of the three medium components was optimized using the simplex-centroid mixture design ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2013.765920
更新日期:2013-07-01 00:00:00
abstract::Biodegradation and bioconversion of lignin are the result of the combined action of fungi, bacteria and actinomycetes. Through screening from forest soil, two novel isolated actinomycete strains were identified as Streptomyces spp. strains F-6 and F-7 by their morphology, cultural characteristics and high homology to ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.672473
更新日期:2012-12-01 00:00:00
abstract::Polystyrene (PS) beads have been studied as a possible filter element, with the aim of increasing the effective production of water in treatment plants. Being a granular material of an effective size of 0.68 mm, sphericity of 0.96 and density of 1046 kg/m3, the use of PS beads may provide washing water savings because...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2016.1244569
更新日期:2017-08-01 00:00:00
abstract::A new approach to the simultaneous removal of SO2 and NO from flue gas, by TiO2 photocatalysis based on UV irradiation technology, is presented. Experiments on the simultaneous desulphurization and denitrification were carried out using this photocatalyst in a self-designed photocatalytic reactor. Under the optimal ex...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330903313786
更新日期:2009-12-14 00:00:00
abstract::This study investigated whether a combined application of hydroxyapatite and ferrihydrite could immobilize lead and antimony in shooting range soil in which the level of lead contamination is markedly higher than that of antimony. In addition, we evaluated the stability of lead and antimony immobilized by the combined...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1042071
更新日期:2015-01-01 00:00:00
abstract::The risks inherent to the inadequate domestic wastewater disposal, allied to the water growing demand, scarcity, and pollution problems, have highlighted the importance of adopting treatment techniques that not only target the sewage discharge, but also its reuse. For this reason, the objective of this study was to ev...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1709905
更新日期:2020-01-03 00:00:00
abstract::The effect of ethylenediaminetetraacetic acid (EDTA) during electrokinetic decontamination (EKD) was investigated in this research. EDTA is a ligand that can form soluble complexes with precipitated heavy metals inside soil pores. Millpond sludge, primarily contaminated with lead (Pb) and zinc (Zn), was subjected to E...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.665493
更新日期:2012-10-01 00:00:00
abstract::The aim of this research was to apply a simple and quick method of size and shape characterization by TEM to diesel exhaust particles from large-capacity, high-performance trucks. Particulate matter (PM) samples were collected while the engines were idling. Investigation of this type of emission is essential because v...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2011.646315
更新日期:2012-07-01 00:00:00
abstract::The production of extracellular protease by different Bacillus licheniformis strains (ATCC 21415, ATCC 21417 and ATCC 21424) was tested in wastewater sludge as a raw material as well as in synthetic soy medium to compare the capacity of protease production by different strains and to compare the capacity of the medium...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330903338429
更新日期:2010-01-01 00:00:00
abstract::In this paper, catalytic samples of 10, 20, 30, 40 and 50% (w/w) urea/activated carbon fibre (AFC), 10% urea--5% La2O3/ACF, 10% urea--10% La2O3/ACF, 10% urea--15% La2O3/ACF, 20% urea--5% La2O3/ACF, 20% urea--10% La2O3/ACF, and 20% urea-15% La2O3/ACF were prepared and used for removal of NO under the condition of: NO, ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2011.606280
更新日期:2012-04-01 00:00:00
abstract::Adsorption tests were carried out in acidic synthetic solutions (pH 2.0) using 20 g l(-1) of various natural adsorbents and 0.25 mM of 11 different metals. In decreasing order, the most efficient adsorbents tested were: oyster shells, cedar bark, vermiculite, cocoa shells and peanut shells. In contrast, weak metal ads...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385552
更新日期:2003-02-01 00:00:00
abstract::In this paper, a novel adsorbent which used polyvinyl alcohol, alginate and biochar was successfully made and been used to remove lead from aqueous solutions. Batch experiments were carried out to evaluate the adsorption capacities of Pb (II) on this bead. Experimental data were analysed by the model equations like La...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1642388
更新日期:2019-07-17 00:00:00
abstract::How to utilize the shadows of buildings and greening to jointly improve the thermal cycle of the commercial pedestrian streets in hot and humid areas in southern China is a problem that needs to be discussed. This paper put forward related concepts of the invalid shadow area, valid shadow area, and thermal regulation ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1718215
更新日期:2020-02-06 00:00:00
abstract::Optimization of Acid Orange 7 (AO7) treatment using heterogeneous Fenton-like method in a recirculating fluidized-bed reactor (FBR) was investigated by using central composite design (CCD). Natural magnetite (NM) as Fenton-like catalyst was characterized using scanning electron microscopy. A nonlinear CCD model was ob...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2016.1267804
更新日期:2017-10-01 00:00:00
abstract::As a kind of biofilm structure, microbial attachment was believed to play an important role in the aggregation and stability of flocculent activated sludge (FAS), and also its translation to aerobic granular activated sludge (AGAS). The aim of this study was to investigate the effect of Ca2+, Mg2+, Cu2+, Fe2+, Zn2+, K...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1080307
更新日期:2016-01-01 00:00:00
abstract::The efficiency of the up-flow anaerobic sludge blanket (UASB) reactor is quite low for the treatment of low strength wastewaters (LSWs) due to less biogas production leading to poor mixing. LSW may be treated efficiently by providing adequate mixing in the UASB reactor when gas production is low, and sufficient mixing...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1026845
更新日期:2015-01-01 00:00:00
abstract::The aim of this paper was, on one hand, to study the treatment of raw tannery effluent by infiltration percolation system and, on the other hand, to determine the distribution and speciation of chromium in the used soil. The system pilot consisted of columns filled to 15 cm of gravel and 60 cm of soil (88% of sand). T...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330801983888
更新日期:2008-06-01 00:00:00
abstract::Effluents from municipal wastewater treatment have been long recognized as suitable media for the cultivation of microalgae biomass. However, few studies report data concerning biomass productivity in continuous reactors using unsterilized wastewater effluents. This study focuses on indigenous microalgae strains that ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2018.1549105
更新日期:2020-06-01 00:00:00
abstract::Ozonation of 2,4-dichlorophenol (DCP) in the presence of permanganate has been investigated at various levels of pH. Compared with only 40% in single ozonation, by catalytic ozonation the total organic carbon removal efficiency reached almost 95%. It has been shown that the addition of 0.5 mg L(-1) MnO4- (based on man...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593331003713677
更新日期:2010-10-01 00:00:00
abstract::Tightening quality standards for European waters has seen a move towards enhanced wastewater treatment technologies such as granulated organic carbon treatment and ozonation. Although these technologies are likely to be successful in degrading certain micro-organic contaminants, these may also destroy compounds which ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1050072
更新日期:2015-01-01 00:00:00
abstract::Use of lignocellulosic crop harvest residues for liquid or gaseous biofuel production may impact soil quality, long-term soil fertility and the major determinants of the latter, stocks of soil organic carbon and nutrients. When soil organic carbon stocks of mineral cropland soils are to be maintained, there is scope f...
journal_title:Environmental technology
pub_type: 杂志文章,评审
doi:10.1080/09593330.2013.826252
更新日期:2013-07-01 00:00:00
abstract::Dual-chamber microbial fuel cells (MFCs), made of clayware cylinder, were operated at different chemical oxygen demands: ammonium-nitrogen (COD:NH4+) ratio (1:1, 10:1 and 5:1) under batch mode for simultaneous removal of ammonia and organic matter from wastewater. Ammonium-N removal efficiencies of 63-32.66% were obta...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.960481
更新日期:2015-03-01 00:00:00