Characterization and ecological risk of polycyclic aromatic hydrocarbons (PAHs) and n -alkanes in sediments of Shadegan international wetland, the Persian Gulf

Ren

et al. 2021

Preprint

The polycyclic aromatic hydrocarbons (PAHs) pollution in Taihu Lake Basin has caused widespread concern. However, the spatial temporal distribution of PAHs in the upstream rivers of Taihu Lake Basin remains largely unknown. Thus, this study aims to investigate the level, spatial distribution, sources and environment risk caused by PAHs in upstream rivers of Taihu Lake Basin. The concentrations of total 16 PAHs (∑16PAHs) ranged from 188.64 to 1060.39 ng/g, with an average of 472.62 ng/g. Compared with low-molecular-weight (LMW) PAHs, high-molecular-weight (HMW) PAHs were more resistant to degradation and easier to accumulate in the sediment. The results of source analysis demonstrated that the PAH pollution was mainly sourced from mixture of fuel combustion and direct petroleum spillage. The ecological risk assessment showed that moderate ecological risk caused by the PAH contaminants might occur in most sample sites. The incremental lifetime cancer risk (ILCRs) ranged from 2.07 ×10-4 - 2.66 × 10-3 for children and 9.66 ×10-5 - 1.24 × 10-3 for adult, indicating moderate cancer risk of PAH-contaminated sediments.

Section: Diagnostic Ratio Chartsmentioning

confidence: 79%

“…PCA was performed to analyze the source distributions of different PAHs. The data for PAHs were standardized to unit variance prior to PCA analysis(Bemanikharanagh et al 2017). main pollutant with mean concentration of 93.65 ng/g, whereas the concentration of Fluo, Acy and DbA were below the detection limit in almost samples.3.2.…”

mentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons (PAHs) In The Upstream Rivers of Taihu Lake Basin, China: Spatial Distribution, Sources And Environmental Risk

Ren

et al. 2021

Preprint

“…These are simply available to specialists and result causes for wetlands with comparable biophysical and environmental situations (Behan 2010). The suggested procedure can be used to examine scene-scale environmental possibilities in wetlands (Belton et al 2002). Hydrological equilibrium was categorized as the most exposed purpose in the wetland and as the most significant purpose.…”

Section: Discussion and Resultsmentioning

confidence: 99%

Review of the effects of the anthropogenic on the wetland environment

Ostad‐Ali‐Askari

2022

Appl Water Sci

The constant deficiency of water modality will increase the incidence of complaint, predominantly for unguarded people in undeveloped republics, where practical doses and substitutes are not enthusiastically available. Many wetland-reliant on types in many percentages of the ecosphere are in degeneration; the location of kind dependent on domestic waters are of exact uneasiness. The chief deficiency and impairment of rivers, branch, swamplands, and other interior wetlands have been occupant’s expansion and increasing financial development. The key deficiency and impairment include infrastructure development, land alteration, water removal, pollution, and the plan of offensive eccentric categories. Agronomical governments and approaches have applied a widespread diversity of characteristically conflicting properties on exclusive and coastal wetlands globally. The foremost the impairment and deficiency of wetlands, including seawater swamplands have been revision to other earthly practices. The most important changes were the development of anthropological populations in the coastal areas and the increase in economic activity. The destruction and dissolution of wetlands, an important route of travel, has endangered many species and injured others. Global climate change is estimated to increase the damage and deprivation of many wetlands, as well as the damage or degradation of their species, and harm the anthropological inhabitants who depend on the facility. Many wetlands change as a result of estimated sea level rise, increased storm surges and storm surges, variability in storm surge concentration and frequency, and fluctuations in waterway flow and sediment flow. The effects of global climate change often amplify the effects of wetland withdrawal. It is well known why many types of wetlands, such as lakes and wetlands, are relocated, transformed, or looted, but the benefits of their conservation are often greater than the benefits associated with their alteration. It will be bigger. In wetland conservation, indigenous peoples have often been excluded from the decision-making process. Decisions at many stages ignore the relationship between wetland conditions and the establishment of wetland facilities, and the resulting benefits to the individual. Many of the amenities supported by wetlands are unfunded and are accumulated in civilizations on a national and global scale. The benefits of transforming wetlands include those that stimulate wetland drainage for agriculture and those that stimulate important wetlands through intensive organizations that include advances in municipalities, manufacturing and recreational industries. It is repeatedly exaggerated by money. With the results in mind, high-level potential hazards and zones with different hazard levels and management approaches have been proposed for this wetland.

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

“…Ayrıca, Bemanikharanagh vd. göre [28], PAH kirlilik durumu şu şekilde kategorize edilebilir: (i) düşük kirli (<100 ng/g), (ii) orta derecede kirli (101-1000 ng/g), (iii) çok kirli (1001-5000 ng/g) ve (iv) çok yüksek derecede kirli (> 5000 ng/g). Bu kriterlere göre, T4 örnekleme noktası hariç, diğer tüm örnekleme noktalarından PAH kirliliği düşük seviyededir.…”

Section: Yüzey Sedimanlarındaki Pah Pcb Ve Ocp'lerin Konsantrasyonlar...unclassified

Tekirdağ iline içme suyu sağlayan bazı baraj gölü/gölet yüzey sedimanlarında PAH, PCB ve OCP düzeylerinin belirlenmesi ve risk değerlendirmesi

Canlı

2022

 Analysis of PAHs, PCBs and pesticides by high precision GC-MS/MS.  The PAHs in the samples are mostly petrogenic  The levels of pollutants in the examples do not exceed ERM values.The purpose of this study was to determine the level of organic pollutants in the surface sediments of some dam lakes/ponds in Tekirdağ, to specifiy possible PAH sources and to perform the ecological risk assessment of sediment quality. Naphthalene is dominant PAH congener in all other sediment samples. In the samples, the most dominant OCP compounds were DDT p, p, DDE p, p and HCH alpha, respectively, while PCB 153, 138 and 180 were the highest detected PCB congeners. Source identification of PAHs was made using the molecular ratios of PAH compounds. Considering all the calculated molecular ratios together, it has been found that the source of PAH compounds in sediment samples is mostly petrogenic. None of the levels of PAHs, PCBs and OCPs in the samples exceeded the ERM values. Figure A. Sediment pollution and analysisPurpose: Determination of the levels of PAH, PCB and chlorinated pesticides in the surface sediments of some lakes/ponds in Tekirdağ was aimed in this study. The possible PAH sources based on the results obtained was also investigated. Theory and Methods:The freeze-dried sediment samples were extracted using an automatic extraction system. Cleanup was done by silica and alumina column chromatography and PAH congeners and PCB/chlorinated pesticide compounds were collected separately and cleaned samples were analyzed by GC-MSMS. Results:It was observed that none of the levels of PAHs, PCBs and OCPs in the samples exceeded the ERM values, which is the pollutant level at which toxic effects often occur in aquatic organisms. Conclusion:Source identification of PAHs was made using the molecular ratios of PAH compounds. Considering all the calculated molecular ratios together, it has been found that the source of PAH compounds in sediment samples is mostly petrogenic. None of the levels of PAHs, PCBs and OCPs in the samples exceeded the ERM values, which is the contaminant level at which toxic effects often occur in aquatic organisms.