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Physiological and biochemical characteristic of Miscanthus×giganteus grown in heavy metal-oil sludge co-contaminated soil

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Journal of Environmental Sciences 2022年第5期34卷 114-125页

作者： Anna Muratova Yelena Lyubun Irina Sungurtseva Olga Turkovskaya Asil Nurzhanova Institute of Biochemistry and Physiology of Plants and Microorganisms RAS Saratov 410015Russia Institute of Plant Biology and Biotechnology Almaty 050040Kazakhstan

The effect of oil sludge and zinc,present in soil both separately and as a mixture on the physiological and biochemical parameters of Miscanthus×giganteus plant was examined in a pot experiment.The opposite effect of pollutants on the accumulation of plant biomass was established:in comparison with uncontaminated control the oil sludge increased,and Zn reduced the root and shoot biomass.oil sludge had an inhibitory effect on the plant photosynthetic apparatus,which intensified in the presence of Zn.The specific antioxidant response of M.×giganteus to the presence of both pollutants was a marked increase in the activity of superoxide dismutase(mostly owing to oil sludge)and glutathione-S-transferase(mostly owing to zinc)in the shoots.The participation of glutathione-S-transferase in the detoxification of both the organic and the inorganic pollutants was assumed.Zn inhibited the activity of laccase-like oxidase,whereas oil sludge promoted laccase and ascorbate oxi-dase activities.This finding suggests that these enzymes play a part in the oxidative detox-ification of the organic pollutant.With both pollutants used jointly,Zn accumulation in the roots increased 6-fold,leading to increase in the efficiency of soil clean-up from the metal.In turn,Zn did not significantly affect the soil clean-up from oil sludge.This study shows for the first time the effect of co-contamination of soil with oil sludge and Zn on the phys-iological and biochemical characteristics of the bioenergetic plant M.×giganteus.The data obtained are important for understanding the mechanisms of phytoremediation with this plant.

关键词： Miscanthus×giganteus oil sludge Zinc Antioxidant enzymes Oxidative enzymes

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Co-Pyrolysis Characteristics and Kinetic Analysis of oil sludge with Different Additives

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Journal of Thermal Science 2021年第4期30卷 1452-1467页

作者： GONG Zhiqiang ZHANG Haoteng LIU Chang WANG Mi WANG Zhenbo LI Xiaoyu DING Junqi State Grid Shandong Electric Power Research Institute Ji’nan 250003China College of New Energy China University of Petroleum(East China)Qingdao 266580China Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China

The addition of effective additives can effectively improve the pyrolysis performance of oil sludge(OS)and have a great potential to reduce pyrolysis costs.In the present study,co-pyrolysis performance of OS with different proportions of additives at a heating rate of 10°C/min was conducted in a thermal analyzer.Walnut shell,Fe_(2)O_(3),K_(2)CO_(3),PVC and the pyrolysis char produced from OS at the final pyrolysis temperature of 700℃were selected as the additives.TG results showed that the OS pyrolysis with and without additives can be divided into five reaction stages,which include volatilization of free water,the escape of light components,the cleavage of heavy components,carbon decomposition and inorganic minerals decomposition.The addition of additives decreased the maximum weight loss rate when the blending ratio was 5 wt%during OS pyrolysis.Kinetic analysis revealed that the overall activation energy of pyrolysis reaction was lower during pyrolysis of OS with the addition of walnut shells and pyrolysis char.The activation energy of three main reaction stages all decreased during co-pyrolysis of OS with K_(2)CO_(3)and PVC.

关键词： oil sludge co-pyrolysis kinetic analysis fitting method

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Pyrolysis behaviors of oil sludge based on TG/FTIR and PY-GC/MS

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Frontiers of Environmental Science & Engineering 2010年第1期4卷 59-64页

作者： Wei SONG Jianguo LIU Yongfeng NIE Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China

Pyrolysis is an alternative technology for oil sludge treatment.Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy and Pyrolysis-Gas Chromatography/Mass Spectrometry were employed to investigate the pyrolysis process and products of oil sludge.The pyrolysis process was divided into five stages:drying and gas desorption,oil volatilization,main pyrolysis,semicoke charring,and mineral decomposition.The main reaction temperatures ranged from 497.6 K to 753.2 K.The products were mainly composed of pairs of alkane and alkene(carbon number ranges from 1 to 27).The mechanisms consisted of random chain scission followed by end chain scission at high temperatures with volatilization occurring during the whole process.This study is useful not only for the proper design of a pyrolysis system,but also for improving the utilization of liquid oil products.

关键词： oil sludge pyrolysis Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy(TGFTIR) Pyrolysis-Gas Chromatography/Mass Spectrometry(PY-GC/MS)

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Effects of temperature on pyrolysis products of oil sludge

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 8-14页

作者： Jianguo LIU Wei SONG Yongfeng NIE Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China

Temperature is the determining factor of pyro-lysis,which is one of the alternative technologies for oil sludge treatment.The effects of final operating temper-ature ranging from 350 to 550uC on pyrolysis products of oil sludge were studied in an externally-heating fixed bed reactor.With an increase of temperature,the mass fraction of solid residues,liquids,and gases in the final product is 67.00%–56.00%,25.60%–32.35%,and 7.40%–11.65%,and their corresponding heat values are 34.4–13.8 MJ/kg,44.41–46.6 MJ/kg,and 23.94–48.23 MJ/Nm 3,respectively.The mass and energy tend to shift from solid to liquid and gas phase(especially to liquid phase)during the process,and the optimum temperature for oil sludge pyrolysis is 500uC.The liquid phase is mainly com-posed of alkane and alkene(C_(5)–C_(29)),and the gas phase is dominantly HC S and H 2.

关键词： oil sludge pyrolysis temperature fixed bed reactor pyrolysis products

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Optimal ratio of oil-sludge and coal mixed fuel

Optimal ratio of oil-sludge and coal mixed fuel

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2011 International Conference on Materials for Renewable Energy & Environment(ICMREE 2011)

After measured fuel parameters such as calorific value, volatiles,ash and water content of the oil-sludge and the coal experimentally,a mixture fuel has been prepared from oil-sludge and coal.It will be recalled that the former has a high proportion of volatiles,whereas the latter has a similar amount of carbon. Such a property allows for mitigation against the amount of oil- sludge produced per annum.This,in turn,ushers in environmental benefits such as reduced pollution,as well as economic advantages in terms of lower energy costs that naturally accompany the conservation of high quality fuel.The optimum mathematical model for the mixed fuel was established.The optimization software was developed to determine the best ratio of sludge-coal,which allows for the goals of Full use of waste oil sludge and waste reduction to be realized.

关键词： oil sludge calorific value volatile optimization software

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