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公开(公告)号：US20240359223A1
公开(公告)日：2024-10-31
申请号：US18759933
申请日：2024-06-30
发明人： Jingwen LI , Yuru SUN , Jing LYU , Nan GUO , Peng LIU , Fuwang WANG , Dongli LIU , Juqing ZHU , Xiaoxin YU
CPC分类号： B09C1/08 , B09C1/06 , B09C2101/00
摘要： The present invention provides a method for in-situ remediation of contaminated soil through multi-technology coupling. The remediation method comprises the following steps: preheating the soil at a contaminated site by using in-situ thermal conductive heating (TCH) technology, and then performing multi-phase extraction; and performing a cycle of injecting hot steam, multi-phase extraction, and injecting an oxidizing agent into the soil at the contaminated site. A system for in-situ remediation of an organically contaminated soil based on the aforementioned method for in-situ remediation of the organically contaminated soil includes a heating well, an injection well, and an extraction well. The heating well is connected to an in-situ thermal conductive heating system, and used for preheating of the soil at the contaminated site. The injection well is connected to an in-situ injection system, and used for injecting the hot steam and the oxidizing agent. The extraction well is connected to a vacuum extraction system, and used for the multi-phase extraction of the contaminated site. In the present disclosure, a pollutant removal rate of the organically contaminated soil is greatly increased by means of a combination of multiple technologies coupled together.
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公开(公告)号：US12103058B2
公开(公告)日：2024-10-01
申请号：US17542125
申请日：2021-12-03
申请人： NANJING TECH UNIVERSITY , CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO., LTD. , NANJING INSTITUTE OF ENVIRONMENTAL SCIENCES, MINISTRY OF ECOLOGY AND ENVIRONMENT OF THE PEOPLE'S REPUBLIC OF CHINA
发明人： Haitao Xu , Yongxian Zhou , Shengtian Zhang , Xiang Ling , Jisai Chen , Haiyan Qin , Xiaofeng Wang , Sun Hu
IPC分类号： B09C1/06
CPC分类号： B09C1/06
摘要： The present invention discloses a soil remediation device and method. Soil is remediated by (i) introducing hot air at 550-650° C. from an outlet of an air heater into the drum from a circulating hot air inlet of a discharge end fixed hood and transferring heat with the soil by direct countercurrent contact such that the soil is heated, and (ii) releasing heat from a heat accumulator at a bottom of the drum through heat pipes such that the soil is heated. As a temperature of the soil gradually rises to about 300-500° C., water and organic contaminants in the soil are volatilized into a gaseous state and carry dust to become thermal desorption offgas that is separated from the soil, the thermal desorption offgas becoming part of the hot air and flowing from the drum to a dust remover. Part of the hot air is recirculated to the drum, and another part of the hot air is discharged after being purified.
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3.发明授权公开(公告)号：US11999638B2
公开(公告)日：2024-06-04
申请号：US18467812
申请日：2023-09-15
申请人： OXYTEC LLC
发明人： Raymond G. Ball
IPC分类号： B09C1/00 , B09C1/06 , B09C1/08 , C02F1/32 , C02F1/70 , C02F1/72 , C02F1/78 , C02F101/30 , C02F101/32 , C02F101/34 , C02F101/36 , C02F103/06
CPC分类号： C02F1/722 , B09C1/002 , B09C1/06 , B09C1/08 , C02F1/32 , C02F1/70 , C02F1/725 , C02F1/727 , C02F1/78 , B09C2101/00 , C02F2101/305 , C02F2101/306 , C02F2101/322 , C02F2101/327 , C02F2101/34 , C02F2101/36 , C02F2101/363 , C02F2103/06
摘要： Disclosed are methods, apparatuses and systems for the remediation of contaminated soils, groundwater, water, and/or waste using a combination of reagents. The disclosed methods may be used to treat various recalcitrant halogenated substances, such as perfluoroalkyls and polyfluoroalkyls. Particular combinations of reagents that may be used in the disclosed methods include but are not limited to: (1) persulfate, oxygen and ozone; (2) persulfate, salt, oxygen and ozone; (3) persulfate, phosphate, and/or oxygen; (4) persulfate, phosphate, oxygen and ozone; (5) persulfate, phosphate, salt and oxygen (6) persulfate, phosphate, salt, oxygen and ozone; (7) oxygen and salt; and (8) air and salt. The disclosed methods may enhance destruction of organic contaminants in the liquid phase and may also control the rate of aerosol or foam formation relative to the rate of chemical oxidation and/or reduction/transfer.
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公开(公告)号：US11979950B2
公开(公告)日：2024-05-07
申请号：US17167600
申请日：2021-02-04
申请人： TRS Group, Inc.
发明人： Andrew B. Small , Daniel W. Oberle
CPC分类号： H05B3/06 , B09C1/062 , B09C2101/00
摘要： A heater for thermal conduction heating suitable for use in non-vertical heater wells for purposes of soil remediation. The heater includes a rigid bar to position a non-insulated heating element in the casing away from the interior surface of the casing.
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5.发明授权公开(公告)号：US11724292B2
公开(公告)日：2023-08-15
申请号：US17545861
申请日：2021-12-08
申请人： NANJING TECH UNIVERSITY , CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO., LTD. , NANJING INSTITUTE OF ENVIRONMENTAL SECIENCES, MINISTRY OF ECOLOGY AND ENVIRONMENT OF THE PEOPLE'S REPUBLIC OF CHINA
发明人： Haitao Xu , Xiang Ling , Shengtian Zhang , Yongxian Zhou , Jisai Chen , Xiaofeng Wang , Sun Hu , Haiyan Qin
CPC分类号： B09C1/06
摘要： A medium internal circulation enhanced thermal desorption soil remediation reactor and a method thereof, and belongs to the technical field of soil remediation. Internal circulation of a thermal medium is realized through a specially designed rotary drum structure, and a way for heating soil by utilizing oxidative decomposition of organic contaminants is provided, so that the treatment efficiency of an apparatus and the contaminant removal effect are improved significantly on the premise of not increasing the scale of the apparatus, and at the same time, the energy consumption of a system is reduced.
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公开(公告)号：US20230249998A1
公开(公告)日：2023-08-10
申请号：US17906608
申请日：2021-08-06
发明人： Lei WANG , Ming CHANG , Haiqing LIAO , Shungui ZHOU , Shaofeng LI , Weining XU , Xiaoshu WANG , Yangyang WANG , Yiwei LI
CPC分类号： C02F3/106 , C02F3/104 , B09C1/08 , B09C1/065 , C02F2003/003
摘要： The present invention relates to a composite treatment and recovery technique of polluted water body and soil. Iron-rich straw biomass, after being crushed, is mixed and granulated with sludge, and is pyrolytic charred by programmed heating, to obtain bulk loaded zero-valent iron biochar and sludge biochar composite particles, which are packed as fillers in a filled bed or as filters in filter cells of a fixed bed, for effective recovery of complex polluted water, polluted by heavy metals, organics, nitrogen, phosphorus, and the like.
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公开(公告)号：US20230044974A1
公开(公告)日：2023-02-09
申请号：US17879060
申请日：2022-08-02
申请人： NANJING TECH UNIVERSITY , NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD.
IPC分类号： B01J31/30 , B01J23/745 , B01J27/128 , B01J31/02 , B01J35/00 , B01J37/04 , B09C1/08 , B09C1/06
摘要： A catalyst for inducing thermal desorption of organic matter-contaminated soil and a preparation method thereof, which uses a colloidal mixture of ferroferric oxide and ferric chloride as a catalytic active component of thermal desorption, and carbon tetrachloride as a solvent. Based on the mass of solvent, a mass percentage of catalytic active component is 0.1%-15%. Ammonia water is added dropwise to ferric chloride aqueous solution to react in oil bath to generate a ferroferric oxide colloidal solution, then ferric chloride and obtained ferroferric oxide colloidal solution are added to carbon tetrachloride, and mixed solution is continuously stirred in an oil bath to evaporate solvent water to prepare a catalyst with carbon tetrachloride as solvent. Catalyst is environmentally friendly and can induce thermal desorption of organic matters in soil. 100% desorption of chlorobenzene, o-xylene and benzo[A]anthracene can be achieved at 130° C., and energy consumption of thermal desorption is greatly reduced.
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公开(公告)号：US11565139B2
公开(公告)日：2023-01-31
申请号：US17244219
申请日：2021-04-29
发明人： Linda S Lee , Jenny E Zenobio
IPC分类号： B01J21/18 , B01J23/755 , A62D3/34 , A62D3/37 , C02F1/70 , B09C1/00 , C02F1/28 , B09C1/06 , B09C1/08 , C02F103/06 , A62D101/22 , C02F101/36
摘要： The present application relates to a novel method for reductive degradation of perfluoroalkyl-containing compounds, such as perfluoroalkyl sulfonates, by activated carbon (AC) supported zero valent iron-nickle nanoparticles (nNi0Fe0).
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9.发明授权公开(公告)号：US11484922B2
公开(公告)日：2022-11-01
申请号：US17212874
申请日：2021-03-25
申请人： EZRATERRA, LLC
摘要： Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.
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10.发明申请公开(公告)号：US20220305537A1
公开(公告)日：2022-09-29
申请号：US17212874
申请日：2021-03-25
申请人： EZRATERRA, LLC
摘要： Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.
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