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Space-Time Cluster Analysis of Accidental oil spills in Rivers State, Nigeria, 2011–2019

Computers, Materials & Continua 2021年第3期66卷 3065-3074页

作者： Sami Ullah Hanita Daud Nooraini Zainuddin Sarat CDass Alamgir Khalil Hadi Fanaee-T Ilyas Khan Department of Fundamental&Applied Sciences Universiti Teknologi PETRONAS32610Seri IskandarPerakMalaysia School of Mathematical and Computer Sciences Heriot-Watt University Malaysia62200PutrajayaMalaysia Department of Statistics University of PeshawarPakistan Center for Applied Intelligent Systems Research(CAISR) Halmstad UniversityHalmstadSweden Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh City72915Vietnam

oil spills cause environmental pollution with a serious threat to local communities and sustainable *** oil spills can be modelled as a stochastic process where each oil spill event is described by its spatial locations and incidence-time and hence allow for space-time cluster *** cluster analysis can detect space-time pattern distribution of oil spills which can be useful for implementing preventive measures and evidence-based decision *** study aims to detect the space-time clusters of accidental oil spills in Rivers state,Nigeria through the Space-time Scan *** Space-time Scan Statistic was applied under the permutation model to the oil spill data(each for sabotage and operational oil spills)collected at Local Government Area(LGA)-level during the period from 2011 to *** results show that the sabotage oil spill clusters have covered most of the LGAs in the southern part of the state at the start of the study period and then in 2018–2019,it moved to the west covering a single *** operational oil spill clusters covered two neighboring LGAs in the *** addition,the temporal cluster of sabotage oil spills was seen in 2019 and operational oil spills in 2011–*** sabotage oil spills show an increasing trend with the maximum in 2019 while the operational oil spills show a decreasing trend with the minimum in *** findings assist in more effective decision-making for combating the environmental problems and controlling the future spill incidence in the cluster-regions.

关键词： oil spills space-time clusters SaTScan^(™) permutation model Nigeria

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Bioremediation of oil spills in Cold Environments: A Review

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Pedosphere 2009年第3期19卷 371-381页

作者： YANG Si-Zhong JIN Hui-Jun WEI Zhi HE Rui-Xia JI Yan-Jun LI Xiu-Mei YU Shao-Peng State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 （China） Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 （China） Department of Geography Harbin College Harbin 150086 （China）

oil spills have become a serious problem in cold environments with the ever-increasing resource exploitation, transportation, storage, and accidental leakage of oil. Several techniques, including physical, chemical, and biological methods, are used to recover spilled oil from the environment. Bioremediation is a promising option for remediation since it is effective and economic in removing oil with less undue environmental damages. However, it is a relatively slow process in cold regions and the degree of success depends on a number of factors, including the properties and fate of oil spilled in cold environments, and the major microbial and environmental limitations of bioremediation. The microbial factors include bioavailability of hydrocarbons, mass transfer through the cell membrane, and metabolic limitations. As for the environmental limitations in the cold regions, the emphasis is on soil temperatures, freeze-thaw processes, oxygen and nutrients availability, toxicity, and electron acceptors. There have been several cases of success in the polar regions, particularly in the Arctic and sub-Arctic regions. However, the challenges and constraints for bioremediation in cold environments remain large.

关键词： bioremediation cold environments freeze-thaw processes frozen soils oil spills

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Environmental Consequences of oil spills on Marine Habitats and the Mitigating Measures—The Niger Delta Perspective

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Journal of Geoscience and Environment Protection 2022年第6期10卷 191-203页

作者： Etuk Etiese Akpan Clean Nigeria Associates Ltd. Arcon Shed 1 Nigerian Ports Authority Port Harcourt Rivers State Nigeria

The Niger Delta region has witnessed environmental impacts arising from oil production activities. Soil fertility in these areas and the entire marine habitat was investigated based on the re-occurring spill incidents in the area to establish the consequences of oil pollution on key performance indicators as well as the remedial actions for resuscitation. One of the bases of evaluation was on the fertility profile of the area impacted by oil spills as compared with the areas without oil spills influence. A suitable cost effective and environmentally friendly technique to handle the pollutions in the Niger Delta region can be found in systematic containment, recovery, clean up and restoration of the marine habitat to its initial capacity and status to be able to sustain life once again.

关键词： oil spills Environmental Consequences oil Pollution and Impact Marine Habitats Niger Delta

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Laboratory Investigation into the Evaporation of Natural-Gas Condensate oils: Hints for the Sanchi oil Spill

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Journal of Ocean University of China 2020年第3期19卷 633-642页

作者： ZHANG Yong YANG Tao ZHANG Junbo LV Baoyi CHENG Xiangsheng FANG Yin East China Sea Environmental Monitoring Center State Oceanic AdministrationShanghai 201206China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

The Sanchi oil tanker collision in the East China Sea on January 6th, 2018 has caused worldwide attention due to its uniqueness. A considerable amount of highly volatile natural-gas condensate oil was spilled, burned and sank with the Sanchi tanker, this entirely new kind of maritime disaster has posed massive unknowns to the public. In this study, for better understanding of the evaporative behavior of condensate oils, two condensate oils were investigated under various laboratory conditions. The overall result demonstrates that the evaporation of condensate oils is highly dependent on the air-exposed time and the total loss of condensate oils could be more than 90% within a short time. However, a certain amount of the high-molecular weight and toxic oil contents such as phenanthrenes still highly remain in the aquatic system even after a long evaporation process, indicating their detrimental potentials to the aquatic organisms. Based on these data, for the Sanchi oil spill accident, it is assumed that although the evaporation weathering of the total condensate oil mass is probably tremendous, the long-term ecological risks of the remaining oil components in the marine environment are strongly recommended to be carefully evaluated.

关键词： condensate oil Sanchi oil spills oil evaporation n-alkanes polycyclic aromatic hydrocarbons

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Detection of oil spill based on CBF-CNN using HY-1C CZI multispectral images

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Acta Oceanologica Sinica 2022年第7期41卷 166-179页

作者： Kai Du Yi Ma Zongchen Jiang Xiaoqing Lu Junfang Yang College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao266590China First Institute of Oceanology Ministry of Natural ResourcesQingdao266061China School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin150001China National Satellite Ocean Application Service Beijing100081China College of Oceanography and Space Informatics China University of Petroleum(East China)Qingdao266580China Technology Innovation Center for Ocean Telemetry Ministry of Natural ResourcesQingdao266061China National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology Xi’an710072China

Accurate detection of an oil spill is of great significance for rapid response to oil spill *** images have the advantages of high spatial resolution,short revisit period,and wide imaging width,which is suitable for large-scale oil spill ***,in wide remote sensing images,the number of oil spill samples is generally far less than that of seawater ***,the sea surface state tends to be heterogeneous over a large area,which makes the identification of oil spills more difficult because of various sea conditions and *** address this problem,we used the F-Score as a measure of the distance between forecast value and true value,proposed the Class-Balanced F loss function(CBF loss function)that comprehensively considers the precision and recall,and rebalances the loss according to the actual sample numbers of various *** the CBF loss function,we constructed convolution neural networks(CBF-CNN)for oil spill *** on the image acquired by the Coastal Zone Imager(CZI)of the Haiyang-1C(HY-1C)satellite in the Andaman Sea(study area 1),we carried out parameter adjustment *** contrast to experiments of different loss functions,the F1-Score of the detection result of oil emulsions is 0.87,which is 0.03–0.07 higher than cross-entropy,hinge,and focal loss functions,and the F1-Score of the detection result of oil slicks is 0.94,which is 0.01–0.09 higher than those three loss *** comparison with the experiment of different methods,the F1-Score of CBF-CNN for the detection result of oil emulsions is 0.05–0.12 higher than that of the deep neural networks,supports vector machine and random forests models,and the F1-Score of the detection result of oil slicks is 0.15–0.22 higher than that of the three *** verify the applicability of the CBF-CNN model in different observation scenes,we used the image obtained by HY-1C CZI in the Karimata Strait to carry out experiments,which include two stu

关键词： oil spills CNN classification loss function sunglint detection

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An analysis of the radar backscatter from oil-covered sea surfaces using moment method and Monte-Carlo simulation: preliminary results

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Acta Oceanologica Sinica 2013年第1期32卷 59-67页

作者： YANG Chan-Su PARK Seong-Min OH Yisok OUCHI Kazuo Korea Ocean Satellite Center Korea Institute of Ocean Science & Technology (KIOST) Marine Environmental System Science University of Science and Technology ISR R&D Laboratory LIG Nex1 Company Department of Electronics Information and Communication Engineering Hongik University Department of Computer Science School of Electrical and Computer Engineering National Defense Academy

An analysis of the radar backscattering from the ocean surface covered by oil spill is presented using a mi- crowave scattering model and Monte-Carlo simulation. In the analysis, a one-dimensional rough sea sur- face is numerically generated with an ocean waveheight spectrum for a given wind velocity. A two-layered medium is then generated by adding a thin oil layer on the simulated rough sea surface. The electric fields backscattered from the sea surface with two-layered medium are computed with the method of moments （MoM）, and the backscattering coefficients are statistically obtained with N independent samples for each oil-spilled surface using the Monte-Carlo technique for various conditions of surface roughness, oil-layer thickness, frequency, polarization and incidence angle. The numerical simulation results are compared with theoretical models for clean sea surfaces and SAR images of an off-spilled sea surface caused by the Hebei （Hebei province, China） Spirit oil tanker in 2007. Further, conditions for better oil spill extraction are sought by the numerical simulation on the effects of wind speed and oil-layer thickness at different inci- dence angles on the backscattering coefficients.

关键词： method of moments Monte-Carlo technique oil spills backscattering coefficient

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Surfactant-Enhanced Soil Washing for Removal of Petroleum Hydrocarbons from Contaminated Soils: A Review

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Pedosphere 2018年第3期28卷 383-410页

作者： Abayneh Ayele BEFKADU CHEN Quanyuan College of Environmental Science and Engineering Donghua University

An increase in energy demand leads to further exploration, transportation, and utilization of petroleum, which creates severe soil contamination because of recurrent accidents and oil spills. Remediation of these contaminated soils is challenging. Among many treatment methods practiced for remediation of petroleum-contaminated soils, surfactant-enhanced soil washing has been widely practiced as a preferred treatment option, as it is a fast and environmentally accepted method. In this paper, we review research undertaken on various anionic, nonionic, cationic, biological, and mixed surfactants for the remediation of petroleum hydrocarbon-contaminated soils. Upcoming surfactants like gemini and switchable surfactants are summarized. We assess the challenges and opportunities of in-situ and ex-situ soil washing, the mechanisms of surfactant-enhanced soil washing, and the criteria to follow for surfactant ***, we briefly discuss the operational and environmental factors affecting soil washing efficiency and soil and surfactant properties affecting surfactant adsorption. We also describe the advantages of coupling soil washing with effluent treatment and surfactant reuse challenges and opportunities. Moreover, challenges and possible new directions for future research on surfactant-enhanced soil washing are proposed.

关键词： adsorption biosurfactant effluent treatment gemini surfactant oil spills organic contaminants remediation soil pollution

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Response of Microbial Community to Petroleum Stress and Phosphate Dosage in Sediments of Jiaozhou Bay, China

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Journal of Ocean University of China 2014年第2期13卷 249-256页

作者： ZHAO Yangguo CHEN Min BAI Jie LI Xinwei Farhana Zulfiqar WANG Qianli College of Environmental Science and Engineering Ocean University of China Key Laboratory of Marine Environment and Ecology Ministry of Education

The dynamic microcosms were used to evaluate the effect of oil spills on microbial ecological system in marine sediment and the enhancement of nutrient on the oil removal. The function and structure of microbial community caused by the oil pollution and phosphate dosage were simultaneously monitored by dehydrogenase activity assay and PCR-denaturing gradient gel electrophoresis(DGGE) techniques. The results indicated that the amount of total bacteria in all dynamic microcosms declined rapidly with incubation time. The number of petroleum-degrading bacteria and the activity of sediment dehydrogenase were gradually enhanced by petroleum in the oil-treated microcosms, while they both showed no obvious response to phosphate dosage. In comparison, phosphate spiked heterotrophic bacteria and they showed a significant increase in amount. DGGE profiles indicated that petroleum dosage greatly changed community structure, and the bacteria belonged to class Deltaproteobacteria, and phyla Bacteroidetes and Chlorobi were enriched. This study demonstrated that petroleum input greatly impacted the microbial community structure and consequently the marine sediment petroleum-degrading activity was enhanced. Phosphate dosage would multiply heterotrophic bacteria but not significantly enhance the petroleum degradation.

关键词： marine sediments oil spills dehydrogenase activity phosphate heterotrophic bacteria bacterial community

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Lipid Profile Altered in Phenanthrene Exposed Zebrafish Embryos with Implications for Neurological Development and Early Life Nutritional Status

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Environment & Health 2023年第1期1卷 32-40页

作者： Victoria McGruer Anil Bhatia Jason T.Magnuson Daniel Schlenk Department of Environmental Sciences University of CaliforniaRiversideCalifornia 92521-9800United States Metabolomics Core Facility IIGBUniversity of CaliforniaRiversideCalifornia 92521-9800United States Department of Chemistry Bioscience and Environmental EngineeringUniversity of StavangerStavanger 4021Norway

Lecithotrophic fish embryos rely on finite maternally deposited yolk resources for early *** exposure can disrupt the uptake of yolk resources with consequences for *** this study,we investigate the impacts of altered yolk utilization on fish embryos using the cardiotoxic compound *** embryos were exposed to a cardiotoxic concentration of phenanthrene beginning at 6 hpf(hours post-fertilization)until a maximum of 72 *** were stained with oil Red O to visualize neutral *** then used a nontargeted approach to profile lipids in 24 and 72 hpf embryos after phenanthrene *** assess changes in lipid movement within the embryo,the yolk sac was dissected from the body at 24 and 72 hpf and analyzed separately from the body at 72 ***,total metabolites were significantly reduced in the yolk sac,and staining for neutral lipids was reduced in the embryo body at 72 *** result is consistent with significant reductions in triglycerides in both the embryo body and yolk,indicating a limited contribution of impaired cardiac function to lipid mobilization at the dose ***,lysophosphatidylcholines and lysophosphatidylethanolamines were significantly increased in the 72 hpf embryo *** pathway analysis indicated that changes to these lysophospholipids could be linked to a disease model associated with inflammation and neuron demyelination consistent with previously observed injuries to neuronal and eye development in fish embryos and larvae.

关键词： phenanthrene lipid profiling developmental toxicity oil spills toxicity mechanisms Danio rerio

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Hydrolysis Lignin as a Sorbent and Basis for Solid Composite Biofuel

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Advances in Bioscience and Biotechnology 2016年第11期7卷 501-530页

作者： Huo Po Savitskaya Tatsiana Reznikov Ivan Hrynshpan Dzmitry Tsygankova Nadejda Telysheva Galina Arshanitsa Alexandr College of Biology and Environmental Engineering Zhejiang Shuren University Hangzhou China Faculty of Chemistry Belarusian State University Minsk Belarus Research Institute for Physical and Chemical Problems Minsk Belarus Latvian State Institute of Wood Chemistry Riga Latvia

New powdered sorbent Lignosorb based on the hydrophobized hydrolysis lignin has been developed at the Belarusian State University. Hydrolysis lignin is a commercial waste product of biomass processing in the hydrolysis production of ethanol. In spite of the various proposals for hydrolysis lignin usage, the wide application has not found yet. Special area of hydrophobized hydrolysis lignin usage as a sorbent for oil spills removal and oil products waste recovery is discussed. Lignosorb, thanks to the rather high bulk density, can be applied manually or mechanically by conventional sprayers. It does not sink after oil adsorption and transforms liquid oil film on the water surface into the solid mass. The solid product is a complete mass and is easily collected from the surface of water. Lignosorb when blended with oil products waste in the volume forms the granular free-running product. The rheological properties of the Lignosorb suspensions in oil products at different sorbent to oil product ratio have been estimated. Saturated by different oil products Lignosorb one can granulate or pellet and utilize as a composite solid fuel including the co-firing regime of combustion. It has the higher heating value of 32.1 - 38.8 MJ/kg while the coal has 20.9 - 30.1 MJ/kg. It has been shown that composite fuel burning has less longstanding inflammation stage, more long stable burning stage and less longstanding phase of smoldering in the comparison to wood and Lignosorb burning.

关键词： Lignin Sorbent oil spills oil Products Waste Composite Fuel

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