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Working paper
The effect of notch size on critical distance and fatigue life predictions
In: Materials and design, Band 196, S. 109095
ISSN: 1873-4197
Fluxes, characteristics and influence on the aquatic environment of inorganic nitrogen deposition in the Danjiangkou reservoir
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 241, S. 113814
ISSN: 1090-2414
The Economic Consequences of Firms' Commitment to ESG Policies
In: HKUST Business School Research Paper No. 2021-29
SSRN
Influence of vacancy on structural and elastic properties of NbSi 2 from first-principles calculations
In: Materials and design, Band 108, S. 13-18
ISSN: 1873-4197
Temporal and spatial biomonitoring of atmospheric heavy metal pollution using moss bags in Xichang
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 239, S. 113688
ISSN: 1090-2414
Whether the digital economy will successfully encourage the integration of urban and rural development: A case study in China
In: Chinese journal of population, resources and environment, Band 21, Heft 1, S. 13-25
ISSN: 2325-4262
LcSABP2, a salicylic acid binding protein 2 gene from Lycium chinense, confers resistance to triclosan stress in Nicotiana tabacum
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 183, S. 109516
ISSN: 1090-2414
Effective removal of ammonia nitrogen from waste seawater using crystal seed enhanced struvite precipitation technology with response surface methodology for process optimization
In: Environmental science and pollution research: ESPR, Band 25, Heft 1, S. 628-638
ISSN: 1614-7499
Isolation and characterization of a novel benzophenone-3-degrading bacterium Methylophilus sp. strain FP-6
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 186, S. 109780
ISSN: 1090-2414
Salicylic acid application alleviates the adverse effects of triclosan stress in tobacco plants through the improvement of plant photosynthesis and enhancing antioxidant system
In: Environmental science and pollution research: ESPR, Band 27, Heft 2, S. 1359-1372
ISSN: 1614-7499
Low-carbon alcohol fuels for decarbonizing the road transportation industry: a bibliometric analysis 2000–2021
In: Environmental science and pollution research: ESPR, Band 29, Heft 4, S. 5577-5604
ISSN: 1614-7499
Feasibility study of dissimilar joining of aluminum alloy 5052 to pure copper via thermo-compensated resistance spot welding
In: Materials and design, Band 106, S. 235-246
ISSN: 1873-4197
Freeze-thaw alternations accelerate plasticizers release and pose a risk for exposed organisms
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 241, S. 113742
ISSN: 1090-2414
Dilution or enrichment: the effects of flood on pollutants in urban rivers
In: Environmental sciences Europe: ESEU, Band 34, Heft 1
ISSN: 2190-4715
Abstract
Background
Flood events increase the risk of sediment erosion and hence the release of particle-bound pollutants besides other processes that can be observed during such events like transportation, lateral distribution and other. Macropollutants, such as acids, salts, nutrients, and natural organic matter, are usually diluted by flooding, while the effect of floods on micropollutants is still unclear. To fill this gap, Qingshui Stream, a tributary of the Jialing River in the city of Chongqing that suffered 75,000 m3·s−1 flood in August 2020 was selected in the current study to clarify effects of flood-induced pollution transportation. 14 surface water samples and 14 sediment samples were collected to analyze the occurrence of micropollutants (including 21 organochlorine pesticides (OCPs), 34 organophosphorus pesticides (OPPs) and 3 estrogenic compounds) before, during and after the flood. Finally, the environmental risks were evaluated by risk quotient (RQ).
Results
The concentrations of total phosphorus (TP), total nitrogen (TN), chemical oxygen demand (COD) in the surface water decreased from upstream to downstream, and the amounts were diluted by flooding from 0.08 to 0.05 mg·L−1 for TP, from 0.06 to 0.02 mg·L−1 for TN and from 132 to 27 mg·L−1 for COD, respectively. The concentration of estrogenic compound was up to 90 ng·g−1, which was reduced to be lower than the limit of detection during flood. Alpha-endosulfan, delta-BHC, mirex, dichlorvos, phosdrin, thionazine, tetraethyl pyrophosphate, diazinon, methyl parathion, malathion, chlorpyrifos, famphur, and EPN were diluted by flooding, i.e., the concentration of delta-BHC reduced from 6.67 to 0.09 ng·g−1; whereas, pp'-DDD, heptachlor epoxide, o,o,o-triethylphosphorothioate, dimethoate, rabon and fensulfothion were enriched after the flood. The environmental risk was observed to be mainly arise from the presence of OPPs, which increased after flooding. The RQ values of OPPs and OCPs increased after the flood, and the potential environmental risk of OPPs accounted for the majority portion of the risk.
Conclusions
The concentrations of macropollutants in surface water and sediments, and 14 micropollutants in sediments were diluted, while pesticides such as pp′-DDD, heptachlor epoxide, o,o,o-triethylphosphorothioate, dimethoate, rabon and fensulfothion were enriched after the flood. These results suggested management on urban river should focus on potential risk of OPPs. The current study therefore could provide scientific evidence and regulatory reference for urban river ecosystem protection.