In order to effectively control petroleum hydrocarbon pollution by immobilisation technology,it is necessary to understanding the degradation pathways of petroleum hydrocarbon in immobilised petroleum-degradation bact...In order to effectively control petroleum hydrocarbon pollution by immobilisation technology,it is necessary to understanding the degradation pathways of petroleum hydrocarbon in immobilised petroleum-degradation bacteria system.However,the adsorption in degradation process is rarely studied.In this study,adsorption process of petroleum hydrocarbon was synergistically studied by means of the surface properties,adsorption thermodynamics and molecular simulation.The results indicate that the immobilised petroleum-degradation bacteria have many holes for the bacteria to adsorb.The diesel adsorption by immobilised petroleum-degradation bacteria is a spontaneous,entropy-increasing and endothermic process.Diesel is first adsorbed to the surface of immobilised petroleum-degradation bacteria through hydrogen bonding,and then is biodegraded.This study provided substantial knowledge of immobilised technology in controlling petroleum hydrocarbon pollution.展开更多
An environmental capacity model for the petroleum hydrocarbon pollutions （PHs） in Jiaozhou Bay is constructed based on field surveys, mesocosm, and parallel laboratory experiments. Simulated results of PHs seasonal ...An environmental capacity model for the petroleum hydrocarbon pollutions （PHs） in Jiaozhou Bay is constructed based on field surveys, mesocosm, and parallel laboratory experiments. Simulated results of PHs seasonal successions in 2003 match the field surveys of Jiaozhou Bay resaonably well with a highest value in July. The Monte Carlo analysis confirms that the variation of PHs concentration significantly correlates with the river input. The water body in the bay is reasonably subjected to self-purification processes, such as volatilization to the atmosphere, biodegradation by microorganism, and transport to the Yellow Sea by water exchange. The environmental capacity of PHs in Jiaozhou Bay is 1500 tons per year IF the seawater quality criterion （Grade Ⅰ/Ⅱ, 0.05 mgLl） in the region is to be satisfied. The contribution to self-purification by volatilization, biodegradation, and transport to the Yellow Sea accounts for 48%, 28%, and 23%, respectively, which make these three processes the main ways of PHs purification in Jiaozhou Bay.展开更多
基金supported by the scientific research fund project of the National Natural Science Foundation of China(grant numbers 52070123 and 51874193)the Natural Science Foundation of Shandong Province(grant numbers ZR2020ME224)+4 种基金the National Key Research and Development Project(grant number 2019YFC0408503)the Science and Technology Projects of Qingdao(grant number 19-6-2-25-cg)Young Science and Technology Innovation Program of Shandong Province(grant number 2020KJD001)the Open Research Fund Program of Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta(Binzhou University)(grant number 2019KFJJ02)Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team[Hydrogen energy chemistry innovation team]。
文摘In order to effectively control petroleum hydrocarbon pollution by immobilisation technology,it is necessary to understanding the degradation pathways of petroleum hydrocarbon in immobilised petroleum-degradation bacteria system.However,the adsorption in degradation process is rarely studied.In this study,adsorption process of petroleum hydrocarbon was synergistically studied by means of the surface properties,adsorption thermodynamics and molecular simulation.The results indicate that the immobilised petroleum-degradation bacteria have many holes for the bacteria to adsorb.The diesel adsorption by immobilised petroleum-degradation bacteria is a spontaneous,entropy-increasing and endothermic process.Diesel is first adsorbed to the surface of immobilised petroleum-degradation bacteria through hydrogen bonding,and then is biodegraded.This study provided substantial knowledge of immobilised technology in controlling petroleum hydrocarbon pollution.
基金supported by the Science Fund Projects of Shandong Province (No.ZR2010DM005)National Key Technology Research and Development Program (No. 2010BAC69B01)+1 种基金Scientific and Technical Projects of Shandong Province on Environmental Protection ‘The source, capacity, and technology study of total control of pollutants in Shandong Province’Science and Technology Development Plan of Qingdao (No. 11-2-3-66-nsh and No. 11-2-1-18-hy)
文摘An environmental capacity model for the petroleum hydrocarbon pollutions （PHs） in Jiaozhou Bay is constructed based on field surveys, mesocosm, and parallel laboratory experiments. Simulated results of PHs seasonal successions in 2003 match the field surveys of Jiaozhou Bay resaonably well with a highest value in July. The Monte Carlo analysis confirms that the variation of PHs concentration significantly correlates with the river input. The water body in the bay is reasonably subjected to self-purification processes, such as volatilization to the atmosphere, biodegradation by microorganism, and transport to the Yellow Sea by water exchange. The environmental capacity of PHs in Jiaozhou Bay is 1500 tons per year IF the seawater quality criterion （Grade Ⅰ/Ⅱ, 0.05 mgLl） in the region is to be satisfied. The contribution to self-purification by volatilization, biodegradation, and transport to the Yellow Sea accounts for 48%, 28%, and 23%, respectively, which make these three processes the main ways of PHs purification in Jiaozhou Bay.
