Experimental study of enhanced in-situ micro-ecological remediation of petroleum contaminated loess soil was carried out in Zhongyuan oil production areas, and the enhanced in-situ micro-ecological remediation techniq...Experimental study of enhanced in-situ micro-ecological remediation of petroleum contaminated loess soil was carried out in Zhongyuan oil production areas, and the enhanced in-situ micro-ecological remediation technique includes optimistic in-situ microbial communities, physical chemistry methods, alfalfa planting and regulation of soil environmental elements. Experiments showed that the oil content in the contaminated soil with oil content about 2 898.25 mg/kg can be reduced about 98.61% after in-situ micro-ecological remediation for 99 days, which demonstrated the effectiveness of in-situ micro-ecological remediation methods for petroleum contaminated soil in central plains of China, and explored the practical and feasible application of these methods.展开更多
Soil contaminated with typical heavy metals (Pb,Cd,Cu,and Zn) was remedied by using the polymeric aluminum salt coagulants including polyaluminum chloride (PAC) and polyaluminum sulfate (PAS).The remediation efficienc...Soil contaminated with typical heavy metals (Pb,Cd,Cu,and Zn) was remedied by using the polymeric aluminum salt coagulants including polyaluminum chloride (PAC) and polyaluminum sulfate (PAS).The remediation efficiencies are influenced by reaction time,water amount,and dosage of remediation agent.The optimal remediation conditions are as follows:6 h of reaction time,1 kg/kg of water addition amount,and 0.25 kg/kg of remediation agent dosage.After PAC addition,the remediation efficiencies of diethylenetriamine-pentaacetic acid (DTPA)-extractable Pb,Cd,Cu,and Zn reach 88.3%,85.1%,85.4%,and 73.7%,respectively;and those for PAS are 89.7%,88.7%,83.5%,and 72.6%,respectively.The main remediation mechanism of the polymeric aluminum salt may contribute to the ionization and hydrolysis of PAC and PAS.H + released from ionization of polymeric aluminum salt can cause the leaching of heavy metals,while the multinuclear complex produced from hydrolysis may result in the immobilization of heavy metals.For PAC,the immobilization of heavy metals is the main remediation process.For PAS,both leaching and immobilization are involved in the remediation process of heavy metals.展开更多
In order to protect ecological environment,it is urgent to restore the polluted environment. Among traditional methods of environmental remediation,it is common to add excessive electron donors or electron acceptors t...In order to protect ecological environment,it is urgent to restore the polluted environment. Among traditional methods of environmental remediation,it is common to add excessive electron donors or electron acceptors to the polluted environment,but these methods have a high cost and can cause secondary pollution easily. Microbial fuel cells( MFCs) can realize the transformation of pollutants and collection of electric energy by using microorganisms as a catalyst; they are clean,efficient and controlled easily and have a wide range of application,so MFCs have wide application prospects in the field of environmental remediation. In this study,MFCs and their applications in the field of environmental remediation were summarized.展开更多
Materials with controllable luminescence colors are highly desirable for numerous promising applications, however, the preparation of such materials, particularly with color-controllable room-temperature phosphorescen...Materials with controllable luminescence colors are highly desirable for numerous promising applications, however, the preparation of such materials, particularly with color-controllable room-temperature phosphorescence(RTP), remains a formidable challenge. In this work, we reported on a facile strategy to prepare color-controllable RTP materials via the pyrolysis of a mixture containing 1-(2-hydroxyethyl)-urea(H-urea) and boric acid(BA). By controlling the pyrolysis temperatures, the as-prepared materials exhibited ultralong RTP with emission colors ranging from cyan, green, to yellow. Further studies revealed that multiple luminescent centers formed from H-urea, which were in-situ embedded in the B2O3matrix(produced from BA) during the pyrolysis process. The contents of the different luminescent centers could be regulated by the pyrolysis temperatures, resulting in color-tunable RTP. Significantly, the luminescent center engineering and in-situ immobilization strategy not only provided a facile method for conveniently preparing color-controllable RTP materials, but also endowed the materials prepared at relatively lower temperatures with color-changeable RTP features under thermal stimulus. Considering their unique properties, the potential applications of the as-obtained materials for advanced anti-counterfeiting and information encryption were preliminarily demonstrated.展开更多
Heavy metal pollution has attracted worldwide attention because of its adverse impact on the aquatic environment and human health.The production of biochar from biowaste has become a promising strategy for managing an...Heavy metal pollution has attracted worldwide attention because of its adverse impact on the aquatic environment and human health.The production of biochar from biowaste has become a promising strategy for managing animal carcasses and remediating heavy metal pollution in the aquatic environment.However,the sorption and remediation performance of carp residue-derived biochar(CRB)in Cu-polluted water is poorly understood.Herein,batches of CRB were prepared from carp residues at 450–650℃(CRB450–650)to investigate their physicochemical characteristics and performance in the sorption and remediation of Cu-polluted water.Compared with a relatively low-temperature CRB(e.g.,CRB450),the high-temperature biochar(CRB650)possessed a large surface area and thermodynamic stability.CRB650 contained higher oxygen-containing functional groups and P-associated minerals,such as hydroxyapatite.As the pyrolytic temperature increased from 450 to 650℃,the maximum sorption capacity of the CRBs increased from 26.5 to 62.5 mg/g.The adsorption process was a type of monolayer adsorption onto homogenous materials,and the sorption of Cu^(2+)on the CRB was mainly based on chemical adsorption.The most effective potential adsorption mechanisms were in order of electrostatic attraction and cation-πinteraction>surface complexation and precipitation>pore-filling and cation exchange.Accordingly,the CRBs efficiently immobilized Cu^(2+)and reduced its bioavailability in water.These results provide a promising strategy to remediate heavy metal-polluted water using designer biochars derived from biowastes,particularly animal carcasses.展开更多
基金financed by the international cooperation project of Ministry of Science and Technology (2005DFA90200)the mine environment management project of Henan Provincial Department of Land and Resources+1 种基金the basic scientific research project fund of Chinese Academy of Geological Sciences (YYWF201519)China Geology Survey Work Program (121201106000150006)
文摘Experimental study of enhanced in-situ micro-ecological remediation of petroleum contaminated loess soil was carried out in Zhongyuan oil production areas, and the enhanced in-situ micro-ecological remediation technique includes optimistic in-situ microbial communities, physical chemistry methods, alfalfa planting and regulation of soil environmental elements. Experiments showed that the oil content in the contaminated soil with oil content about 2 898.25 mg/kg can be reduced about 98.61% after in-situ micro-ecological remediation for 99 days, which demonstrated the effectiveness of in-situ micro-ecological remediation methods for petroleum contaminated soil in central plains of China, and explored the practical and feasible application of these methods.
基金Project(K1201010-61)supported by the Science and Technology Program of Changsha,ChinaProject(51074191)supported by the National Natural Science Foundation of ChinaProject(2012BAC09B04)supported by National Key Technology Research and Development Program,China
文摘Soil contaminated with typical heavy metals (Pb,Cd,Cu,and Zn) was remedied by using the polymeric aluminum salt coagulants including polyaluminum chloride (PAC) and polyaluminum sulfate (PAS).The remediation efficiencies are influenced by reaction time,water amount,and dosage of remediation agent.The optimal remediation conditions are as follows:6 h of reaction time,1 kg/kg of water addition amount,and 0.25 kg/kg of remediation agent dosage.After PAC addition,the remediation efficiencies of diethylenetriamine-pentaacetic acid (DTPA)-extractable Pb,Cd,Cu,and Zn reach 88.3%,85.1%,85.4%,and 73.7%,respectively;and those for PAS are 89.7%,88.7%,83.5%,and 72.6%,respectively.The main remediation mechanism of the polymeric aluminum salt may contribute to the ionization and hydrolysis of PAC and PAS.H + released from ionization of polymeric aluminum salt can cause the leaching of heavy metals,while the multinuclear complex produced from hydrolysis may result in the immobilization of heavy metals.For PAC,the immobilization of heavy metals is the main remediation process.For PAS,both leaching and immobilization are involved in the remediation process of heavy metals.
基金Supported by Shandong Higher Education Institution Science And Technology Plan Project(J16LD03)Doctoral Scientific Research Foundation of Binzhou University(2014Y17)Shandong Key Research and Development Plan(2015GNC111018,2016GSF117021)
文摘In order to protect ecological environment,it is urgent to restore the polluted environment. Among traditional methods of environmental remediation,it is common to add excessive electron donors or electron acceptors to the polluted environment,but these methods have a high cost and can cause secondary pollution easily. Microbial fuel cells( MFCs) can realize the transformation of pollutants and collection of electric energy by using microorganisms as a catalyst; they are clean,efficient and controlled easily and have a wide range of application,so MFCs have wide application prospects in the field of environmental remediation. In this study,MFCs and their applications in the field of environmental remediation were summarized.
基金Project(202203021212308)supported by the Fundamental Research Program of Shanxi Province,ChinaProject(HZKY20220508)supported by the Ministry of Education’s“Chunhui Plan”Cooperative Scientific Research Project,China+5 种基金Project(KF-22-16)supported by the Open Fund from the Key Lab of Eco-restoration of Regional Contaminated Environment(Shenyang University)Ministry of Education,ChinaProject(20222020)supported by the Doctoral Foundation of Taiyuan University of Science and Technology,ChinaProject(2022L297)supported by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province,ChinaProject supported by the Startup Funds of San Diego State University,USAProject(202304051001016)supported by the Special Fund for Science and Technology Innovation Teams of Shanxi Province,China。
基金the National Natural Science Foundation of China (Nos. 51872300 and 52003284)the Natural Science Foundation of Jiangsu Province (No. BK20210481)the Fundamental Research Fund of Jiangnan University (No. JUSRP122015) for financially supporting this work。
文摘Materials with controllable luminescence colors are highly desirable for numerous promising applications, however, the preparation of such materials, particularly with color-controllable room-temperature phosphorescence(RTP), remains a formidable challenge. In this work, we reported on a facile strategy to prepare color-controllable RTP materials via the pyrolysis of a mixture containing 1-(2-hydroxyethyl)-urea(H-urea) and boric acid(BA). By controlling the pyrolysis temperatures, the as-prepared materials exhibited ultralong RTP with emission colors ranging from cyan, green, to yellow. Further studies revealed that multiple luminescent centers formed from H-urea, which were in-situ embedded in the B2O3matrix(produced from BA) during the pyrolysis process. The contents of the different luminescent centers could be regulated by the pyrolysis temperatures, resulting in color-tunable RTP. Significantly, the luminescent center engineering and in-situ immobilization strategy not only provided a facile method for conveniently preparing color-controllable RTP materials, but also endowed the materials prepared at relatively lower temperatures with color-changeable RTP features under thermal stimulus. Considering their unique properties, the potential applications of the as-obtained materials for advanced anti-counterfeiting and information encryption were preliminarily demonstrated.
基金This work was financially supported by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province(China)(No.2021L460)the Key R&D Project of Shaanxi Province(China)(No.2022NY-054)+1 种基金the Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City(China)(No.220LH061)the Natural Science Fund for Distinguished Young Scholars of Shandong Province(China)(No.ZR2021JQ13).
文摘Heavy metal pollution has attracted worldwide attention because of its adverse impact on the aquatic environment and human health.The production of biochar from biowaste has become a promising strategy for managing animal carcasses and remediating heavy metal pollution in the aquatic environment.However,the sorption and remediation performance of carp residue-derived biochar(CRB)in Cu-polluted water is poorly understood.Herein,batches of CRB were prepared from carp residues at 450–650℃(CRB450–650)to investigate their physicochemical characteristics and performance in the sorption and remediation of Cu-polluted water.Compared with a relatively low-temperature CRB(e.g.,CRB450),the high-temperature biochar(CRB650)possessed a large surface area and thermodynamic stability.CRB650 contained higher oxygen-containing functional groups and P-associated minerals,such as hydroxyapatite.As the pyrolytic temperature increased from 450 to 650℃,the maximum sorption capacity of the CRBs increased from 26.5 to 62.5 mg/g.The adsorption process was a type of monolayer adsorption onto homogenous materials,and the sorption of Cu^(2+)on the CRB was mainly based on chemical adsorption.The most effective potential adsorption mechanisms were in order of electrostatic attraction and cation-πinteraction>surface complexation and precipitation>pore-filling and cation exchange.Accordingly,the CRBs efficiently immobilized Cu^(2+)and reduced its bioavailability in water.These results provide a promising strategy to remediate heavy metal-polluted water using designer biochars derived from biowastes,particularly animal carcasses.
