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Experimental investigation of surfactant adsorption during EOR and soil pollution control processes:Influence of surfactant concentration,water salinity,and clay type

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Petroleum 2024年第3期10卷 527-538页

作者： Arian Pishkoo Behnam Sedaee Alireza Bahramian Institute of Petroleum Engineering Chemical Engineering DepartmentCollege of EngineeringUniversity of TehranTehranIran

Surfactant injection is a well-established method of chemical EOR *** adsorption into clay layers can prevent their proper performance and thus reduce the oil recovery *** the other hand,this adsorption property of clay materials can be used to prevent surface and underground water pollution and reduce soil *** this experimental study,the effect of surfactant concentration,electrolyte type(NaCl and MgCl_(2)),and the solution salinity on fluid adsorption into the interlayer space of different clay types(bentonite and kaolinite)was *** analysis was conducted on two relevant clay samples,and immersion and Washburn tests were performed on the desired samples with the Sigma 700 ***,according to the clay type,the most optimal conditions were introduced for the surfactant solution used in the two areas of EOR and environmental processes related to reducing soil *** the EOR processes,the optimal condition for the lowest adsorption amount is C(with 1 CMC concentration and salinity of 100,000 ppm for NaCl salt).This fluid works better in kaolinite *** the environmental field related to the reduction of soil pollution,if the pollutants we are looking for are R and S(with alkyl benzene sulfonic acid as the dominant agent),bentonite has a better performance than kaolinite in terms of adsorption and subsequently pollution *** the polluting fluid contains MgCl_(2) ions in the exact salinity values,the adsorption amount and soil pollution control will be higher for both adsorbent clays than if our fluid has NaCl *** study's findings have a wide range of applications in surfactant flooding designs,surfactant adsorption optimization,and can be generalized to other detergent types.

关键词： EOR Adsorption Clay Bentonite Kaolinite soil pollution Surfactant Immersion test Washburn test Salinity

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Relationships between soil pollution by heavy metals and melanin-dependent coloration of a fossorial amphisbaenian reptile

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Integrative Zoology 2022年第4期17卷 596-607页

作者： JoséMARTÍN Pablo RECIO Gonzalo RODRÍGUEZ-RUIZ Isabel BARJA Eduardo GUTIÉRREZ Luis VGARCÍA Departamento de Ecología Evolutiva Museo Nacional de Ciencias NaturalesCSICMadridSpain Departamento de Zoología Facultad de BiologíaUniversidad Autónoma de MadridMadridSpain Centro de Investigación en Biodiversidad y Cambio Global(CIBC-UAM) Universidad Autónoma de MadridMadridSpain Departamento de Biogeoquímica Ecología Vegetal y MicrobianaInstituto de Recursos Naturales y Agrobiología de SevillaCSICSevillaSpain

Melanin is the basis of coloration in many animals,and although it is often used in communication,thermoregulation,or camouflage,melanin has many other physiological *** example,in polluted habitats,melanin can have a detoxifying *** coloration would help to sequester in the skin the heavy metal contaminants from inside the body,which will be expelled to the exterior when the skin is ***,animals should have evolved more melanic colorations in more polluted habitats(“industrial melanism”hypothesis).We examined whether the fossorial amphisbaenian reptile,Trogonophis wiegmanni,is able to eliminate heavy metals,derived from soil pollution by seagull depositions,through sloughing its *** results suggest a covariation between levels of soil pollution by heavy metals and the concentration of heavy metals in the sloughed skins of *** suggests that amphisbaenians may expel heavy metals from their bodies when they slough the *** also tested whether amphisbaenians inhabiting soils with higher levels of heavy metal pollution had darker(melanin-dependent)body ***,contrary to predictions from the“industrial melanization”hypothesis,we found a negative relationship between soil pollution and proportions of melanic *** contradictory result could,however,be explained because heavy metals have endocrine disruption effects that increase physiological stress,and higher stress levels could result in decreased *** suggest that although amphisbaenians might have some detoxifying mechanism linked to melanin in the skin,this process might be negatively affected by stress and result ineffective under conditions of high soil pollution.

关键词： amphisbaenians coloration fossorial reptiles heavy metals melanin soil pollution

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Overview of Patented Technologies for Remediation of soil pollution

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Meteorological and Environmental Research 2015年第5期6卷 58-62页

作者： Zhou Shaohua Fang Ping College of Environmental Science and Engineering Tongji University UNEP-Tongji Institute of Environment for Sustainable Development Shanghai Key Laboratory of Cities' Mitigation and Adaptation to Climate Change China Meteorological Administration(CMA)

soil, an important material basis for human activities, is an indispensable natural rasource that is difficult to regenerate. It is also an important part of human ecological environment. Currently, soil pollution has affected China＇s agricultural production and threatened human health and ecological safety, so it has been paid more attention to by the people and has become a hot spot in environmental field. Through continuous research, a variety of soil remediation patents and technologies also emerge. Here, by retrieving the main words through the website （www. soopat. corn） and Chinese patent net, types of soil pollution and remediation technologies under the authorization status of the patents were analyzed, and the major species of soil pollutants and soil remediation technologies were reviewed.

关键词： soil pollution Environment soil remediation technology Patent Agricultural production China

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Countermeasures for Remediation of soil pollution in Metal Mines

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Meteorological and Environmental Research 2021年第4期12卷 62-64页

作者： Siyuan SUN Pei LI Sheng ZHAN Zhongjun Ecological Environment(Shanghai)Co. Ltd.Shanghai 201210China

Firstly,the causes and existence state of soil pollution in metal mines were ***,the remediation technology of heavy metal contaminated soil was ***,the remediation strategies for soil pollution in metal mines were **... 详细信息

关键词： Metal mines soil pollution Phytoremediation Mining

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From soil pollution to “Cadmium Rice” to Public Health Impacts: An Interdisciplinary Analysis of Influencing Factors and Possible Responses

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Journal of Resources and Ecology 2018年第1期9卷 1-12页

作者：贺珍怡王五一牛津大学跨学科区域学院英国牛津OX26LH 中国科学院地理科学与资源研究所北京100101

This article discusses the causes of the contamination of rice with cadmium in China and considers what we know about the severity of the problem. It argues that it is misleading to extrapolate simply from levels of cadmium in soil to health risks, because the uptake of cadmium by crops and the health impacts of the metal are affected by multiple factors. These include not only background levels of cadmium and pollution from mining and industry, but also soil quality, climatic conditions and the type and variety of crops grown. Social and cultural factors, including dietary habits, other exposure sources, nutritional quality and general health status will also affect the intake of cadmium and the severity of health impacts. For these reasons we argue that interdisciplinary analysis is crucial to a better understanding of patterns of risk to health from cadmium pollution, and to the design of effective responsive measures.

关键词： soil pollution food safety cadmium rice environmental health China

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soil vanadium pollution and microbial response characteristics from stone coal smelting district

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Transactions of Nonferrous Metals Society of China 2015年第4期25卷 1271-1278页

作者：肖细元杨淼郭朝晖姜智超刘亚男曹霞中南大学冶金与环境学院环境工程系长沙410083

A field investigation was performed to study the content, speciation and mobility of vanadium, as well as microbial response in soil from a stone coal smelting district in Hunan province of China. The results showed that the contents of soil V ranged from 168 to 1538 mg/kg, which exceeded the maximum permissible value of Canadian soil quality for V. The mean soil V content from wasteland area reached 1421 mg/kg, and those from the areas related with slag heap, ore pile and smelting center were 380, 260 and 225 mg/kg, respectively. Based on the results of the modified BCR sequential extraction procedure, V contents in the mobile fractions varied from 19.2 to 637 mg/kg accounting for 7.4%-42.3% of total V, and those of V(+5) species were between 21.9 and 534.0 mg/kg. soil enzyme activity and microbial basal respiration were adversely affected by high level of soil V. More attention should be paid to soil V pollution and potential hazardous surrounding the stone coal smelting district.

关键词： vanadium soil pollution mobility microbial response stone coal smelting district

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Impact of coal power generation on the characteristics and risk of heavy metal pollution in nearby soil

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Ecosystem Health and Sustainability 2020年第1期6卷 412-423,411页

作者： Yiqun Zhang Di Wu Chenxing Wang Xiao Fu Gang Wu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of Architecture Design and Research Chinese Academy of SciencesBeijingChina

Introduction:The development of coal power base(CPB)poses a severe challenge to the *** conducted a soil survey in Xilinhot CPB,to evaluate and analyze the pollution characteristics,potential ecological risk,and sources of six heavy metals(As,Pb,Cu,Zn,Mn,and Cd)in soil by using Geo-accumulation index,revised Nemerow integrated pollution index(RNIPI),and potential ecological risk index(RI).Outcomes/other:The results showed that the pollution of Cd and As were *** mean of Cd and As were 1.11 mg·kg^(-1) and 25.13 mg·kg^(-1),which were 42.55 times and 4.41 times higher than its local background *** Geo-accumulation indices showed the contamination degree of Cd was strong and As was moderate,and the status of Cu,Pb,Zn,and Mn were *** was strongly contaminated based on its RNIPI and RI ***:The accumulations of As,Pb,and Cd were mainly associated with anthropogenic sources,including coal mining and combustion,and industrial exhaust ***,Mn,and Zn were primarily originated from the parent material(natural sources).Conclusion:This study provides scientific basis and effective countermeasures for the prevention and control of soil pollution in surrounding areas of CPB.

关键词： soil pollution heavy metal contamination potential ecological risk sustainability coal power base Xilinhot

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Physico-chemical characterization of a farmland affected by wastewater in relation to heavy metals

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第3期9卷 366-372页

作者： Emmanuel U. ONWEREMADU Department of soil Science and Technology Federal University of Technology PMB 1526 Owerri Nigeria

This study investigated selected properties of soils affected by wastewater and its relationship with some heavy metals. A free survey technique involving target sampling was used in siting soil profile pits. soil samples were collected based on horizon differentiation and analyzed using routine and special analytical techniques. soil data were subjected to correlation analysis using SAS program. Results show that all heavy metals studied had values above critical limits in the polluted soils using known standards and that these biotoxic metals decreased with soil depths. Highly significant (P=0.01 and 0.05) relationships were established between investigated heavy metals and some soil properties, especially soil pH and organic matter. Further studies involving more edaphic properties, biotoxic metals and their bioaccessibility in crops growing on wastewater soils will surely enhance knowledge and management of these highly anthropogenically influenced soils of the study site.

关键词： Bioavailability Characterization Heavy metals soil pollution Wastewater

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Biodegradation of benzo[a]pyrene in soil by Mucor ***06 and Bacillus ***02 co-immobilized on vermiculite

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Journal of Environmental Sciences 2006年第6期18卷 1204-1209页

作者： SU Dan LI Pei-jun FRANK Stagnitti XIONG Xian-zhe Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate University of Chinese Academy of Sciences Beijing 100049 China School of Life and Environmental Science Faculty of Science and Technology P. O Box 423 Warmambool Victoria 3280 Australia

Two indigenous microorganisms, Bacillus sp. SB02 and Mucor sp. SF06, capable of degrading polycyclic aromatic hydrocarbons （PAHs） were co-immobilized on vermiculite by physical adsorption and used to degrade benzo[a] pyrene （BaP）. The characteristics of BaP degradation by both free and co-immobilized microorganism were then investigated and compared. The removal rate using the immobilized bacterial-fungal mixed consortium was higher than that of the freely mobile mixed consortium. 95.3% of BaP was degraded using the co-immobilized system within 42 d, which was remarkably higher than the removal rate of that by the free strains. The optimal amount of inoculated co-immobilized system for BaP degradation was 2%. The immobilized bacterial-fungal mixed consortium also showed better water stability than the free strains. Kinetics of BaP biodegradation by co-immobilized SF06 and SB02 were also studied. The results demonstrated that BaP degradation could be well described by a zero-order reaction rate equation when the initial BaP concentration was in the range of 10--200 mg/kg. The scanning electronic microscope （SEM） analysis showed that the co-immobilized microstructure was suitable for the growth of SF06 and SB02. The mass transmission process of co-immobilized system in soil is discussed. The results demonstrate the potential for employing the bacterial-fungal mixed consortium, co-immobilized on vermiculite, for in situ bioremediation of BaP.

关键词： biodegradation Bacillus sp. SB02 Mucor sp. SF06 benzo[a]pyrene immobilization soil pollution

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Abundance,spatial distribution,and physical characteristics of microplastics in stormwater detention ponds

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 75-87页

作者： Muhammad Masood Ashiq Farhad Jazaei Kati Bell Ahmed Shakir Ali Ali Alireza Bakhshaee Peyman Babakhani Department of Civil Engineering University of MemphisMemphisTN 38152USA Brown and Caldwell NashvilleTN 37228USA Earth Surface Science Institute School of Earth and EnvironmentUniversity of LeedsLeedsLS29JTUK

Despite extensive research on microplastics (MP) in marine environments, little is known about MP abundance and transport in terrestrial systems. There is, therefore, still little understanding of the main mechanisms driving the substantial transport of MP across different environmental compartments. Storm events can transport MP beyond boundaries, such as from the land to groundwater or the ocean, as has already been discovered for organic carbon transport. Urban stormwater detention ponds are suitable environments to study the impact of stormwater on the environmental fate and transport of MP. Herein, we investigate the longitudinal and vertical distribution of MP within two detention ponds with different physical characteristics. soil samples were collected at various locations and from multiple depths (surface and subsurface layers) for measuring MP concentrations using fluorescence microscopy. Our findings show that MP are retained more near the inlet of the ponds, and MP of larger sizes were found more abundantly near inlets than outlets. We also found that MP mass and sizes decrease from surface soil to subsurface soil. In the pond, where vegetation (grass root network) was more considerable, MP were found more evenly distributed along the depth. In terms of shape, the fragments were the most abundant MP shape.

关键词： Microplastic Environmental transport soil pollution Stormwater Detention ponds

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