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公开(公告)号：US11065610B2
公开(公告)日：2021-07-20
申请号：US16629316
申请日：2018-12-13
申请人： Nanjing University , Nanjing University&Yancheng Academy of Environmental Protection Technology and Engineering
发明人： Jinnan Wang , Suqian Xu , Zhibin Wen , Lifang Chen , Weilin Bian
IPC分类号： B01J37/08 , B01J27/24 , B01J35/08 , B01J35/10 , B01J37/10 , C02F1/72 , C02F101/30 , C02F101/34 , C02F101/36 , C02F101/38
摘要： A method for preparing a Fenton catalytic material includes the following steps: (1) placing a nitrogen-containing compound in a muffle furnace for calcination, then dissolving the product in deionized water to form a suspension solution; (2) dissolving aluminum nitrate nonahydrate, copper nitrate trihydrate and glucose in deionized water to form a solution; (3) adding the suspension solution in a dropwise manner to the solution, then performing a closed hydrothermal reaction, washing with water, centrifuging and drying to obtain a solid; and (4) placing the prepared solid in a muffle furnace for calcination to obtain the Fenton catalytic material. The catalytic material presents a complete ball-flower shaped mesoporous structure, has a large specific surface area and dual reaction centers to expose more catalytic active sites, so that H2O2 is reduced at the electron-rich center as much as possible to generate hydroxyl radicals during the reaction.
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公开(公告)号：US20210023545A1
公开(公告)日：2021-01-28
申请号：US16629316
申请日：2018-12-13
申请人： NANJING UNIVERSITY , NANJING UNIVERSITY&YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING
发明人： Jinnan WANG , Suqian XU , Zhibin WEN , Lifang CHEN , Weilin BIAN
摘要： A method for preparing a Fenton-like catalytic material with dual reaction centers includes the following steps: (1) placing a nitrogen-containing compound in a muffle furnace for calcination, then dissolving the product in deionized water to form a suspension solution; (2) dissolving aluminum nitrate nonahydrate, copper nitrate trihydrate and glucose in deionized water to form a solution; (3) adding the suspension solution in a dropwise manner to the solution, then performing a closed hydrothermal reaction, washing with water, centrifuging and drying to obtain a solid; and (4) placing the prepared solid in a muffle furnace for calcination to obtain the Fenton-like catalytic material. The catalytic material presents a complete ball-flower shaped mesoporous structure, has a large specific surface area, and can expose more catalytic active sites, so that H2O2 is reduced at the electron-rich center as much as possible to generate hydroxyl radicals during the reaction.
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3.发明申请公开(公告)号：US20220194824A1
公开(公告)日：2022-06-23
申请号：US17599919
申请日：2020-04-01
申请人： NANJING UNIVERSITY , NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING
发明人： Chendong SHUANG , Shuangshuang LI , Tong LI , Guang ZHANG , Aimin LI , Ke WANG , Juntian WANG
摘要： The present invention belongs to the technical field of water treatment, and in particular to a magnetic powder strengthened method for removing nitrate nitrogen and inorganic phosphorus, which includes the following steps: (1) mixing permanent magnetic material powder with paramagnetic Fe3O4 powder, and magnetizing the mixture in a magnetic field to prepare magnetic powder; (2) adding the magnetic powder directly or in a form of granular filler into a water treatment reaction vessel; and (3) allowing the to-be-treated water to enter the water treatment reaction vessel, performing a chemical reaction of removing nitrate nitrogen and inorganic phosphorus in the presence of a reducing agent, and discharging the water after the reaction is completed. By adopting the method of the present invention, a uniform and fine magnetic field can be provided, thus the reaction efficiency is improved, and the process is simplified and the cost is lowered.
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4.发明授权公开(公告)号：US11254598B2
公开(公告)日：2022-02-22
申请号：US16764847
申请日：2018-04-20
申请人： NANJING UNIVERSITY , NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING
发明人： Chendong Shuang , Guang Zhang , Ting Ye , Aimin Li , Liang Tan , Ke Wang
IPC分类号： C02F9/00 , C02F1/42 , C02F1/48 , C02F3/30 , C02F101/16
摘要： In view of the current pollution to sewage by nitrate nitrogen, the present invention discloses a method for promoting denitrification to remove nitrate nitrogen in water by magnetic resins. In the method disclosed by the present invention, magnetic anion exchange resins are in contact with and mixed with sewage, and nitrate nitrogen in the sewage is removed quickly and efficiently by both the ion exchange between the magnetic anion exchange resins and the nitrate nitrogen in the sewage and the denitrification enhanced by the magnetic material. Meanwhile, the regeneration and recycle of the magnetic anion exchange resins are realized by the denitrification of microorganisms.
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公开(公告)号：US10604599B2
公开(公告)日：2020-03-31
申请号：US15991937
申请日：2018-05-29
申请人： Nanjing University , Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering
发明人： Chendong Shuang , Weiwei Zhou , Yunshu Wang , Aimin Li , Qimeng Li , Lili Liu , Wei Wang , Yi Zhang
摘要： A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70□ to 75□ for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70□ to 80□, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 80±5□ and then maintaining the temperature for 1 h, and heating to 85±5□ and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.
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公开(公告)号：US09724687B2
公开(公告)日：2017-08-08
申请号：US14911994
申请日：2014-08-08
申请人： Nanjing University , Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering
发明人： Aimin Li , Zixiao Xu , Bicun Jiang , Chendong Shuang , Qing Zhou , Wentao Li , Xinchun Ding , Yeli Jiang , Mengqiao Wang , Ke Shen , Weiwei Zhou
CPC分类号： B01J49/50 , C02F1/42 , C02F1/52 , C02F2303/16
摘要： Implementations herein relate to methods for reducing a desorption solution for regeneration of ion exchange resins in the field of regeneration of resins. The implementations solve problems related to low utilization rates of regeneration agents and high volumes of desorption solutions during the desorption process. The implementations include regenerating the ion exchange resins, and the regeneration solution becomes the desorption solution. After coagulating sedimentation of the desorption solution and slurry separation, a large amount of organic contents are removed from coagulation serum and a large amount of regenerate agents are left. The implementations further include adding the regeneration agent to the coagulation serum to form new or refreshed regeneration solution to regenerate the ion exchange resins. Accordingly, the coagulation serum may be generated from the desorption solution. These operations may be repeated multiple batches for resin regeneration.
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公开(公告)号：US20210162397A1
公开(公告)日：2021-06-03
申请号：US15774966
申请日：2017-06-28
申请人： Nanjing University , Nanjing University & Yancheng Academy Of Environmental Protection Technology And Engineering
发明人： Peng Shi , Xun Cao , Xinchun Ding , Aimin Li , Jianjun Dai , Xiao Zhang , Xiang Peng , Dongmei Li , Yinsen Li , Jiali Tang
摘要： The invention discloses a fixed bed counter-current regeneration device for ion exchange resin and the method of use, relates to the field of ion exchange resin regeneration. The device comprises a cyclone separator, a regeneration reactor, a fully mixed resin reactor, a desorption solution storage tank, and a regenerant storage tank, wherein the cyclone separator is placed on top of the regeneration reactor, the upper part of the cyclone separator is connected to the fully mixed resin reactor. A resin inlet is provided at the bottom of the cyclone separator, a resin bed and a resin filter are arranged inside the regeneration reactor, a resin outlet and a regenerant inlet are arranged at the bottom of the regeneration reactor, the resin outlet is connected to the fully mixed resin reactor, the regenerant inlet is connected to the desorption solution storage tank and the regenerant storage tank, respectively, one side of the regeneration reactor is further provided with a regenerant outlet, and the regenerant outlet is connected to the desorption solution storage tank. The invention effectively improves resin regeneration efficiency via separator and counter-current, reduces the desorption solution yield, prevents mechanical wear and tear of the resin, and can be used as part of large-scale ion exchange resin applications.
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公开(公告)号：US20210238318A1
公开(公告)日：2021-08-05
申请号：US17050659
申请日：2018-10-24
申请人： Nanjing University , NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING
发明人： Peng SHI , Huaicheng ZHANG , Aimin LI , Fangyu CHANG , Qing ZHOU , Chendong SHUANG , Qimeng LI , Yang PAN
IPC分类号： C08F8/44 , C08F220/32 , C08F226/06 , C08F224/00 , A01N33/12 , C02F1/50 , C02F1/42
摘要： Disclosed is a composite functional resin, having the basic structure of Formula (I) and/or Formula (II), wherein AX is a quaternary ammonium group. In view of the problems that the existing resins have poor anti-interference ability, and poor ability to remove dissolved organic matter, disinfection by-product precursors, and anions such as nitrate, sulfate, phosphate and arsenate in water while sterilizing, the composite functional resin of the present invention has the ability to efficiently remove dissolved organic matter, disinfection by-product precursors, and anions such as nitrate, sulfate, phosphate, and arsenate in water, and has the advantages of efficient sterilization and high anti-interference ability. The composite functional resin can be applied in sterilization and water treatment.
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公开(公告)号：US20230002261A1
公开(公告)日：2023-01-05
申请号：US17642909
申请日：2021-01-08
发明人： Lifang CHEN , Xin QIU , Lian WANG , Jinnan WANG , Jianjun DAI , Aimin LI
摘要： The present disclosure discloses a multi-stage apparatus and process for advanced oxidation treatment of wastewater, and belongs to the field of wastewater treatment in environmental protection. The apparatus includes a liquid-liquid mixing unit, a preheating unit, a gas-liquid mixing unit, a parallel photocatalytic reactor group and an oxidation tower connected in sequence. According to characteristics of free radical reactions, the parallel photocatalytic reactor group and the oxidation tower in the apparatus are reasonably designed, utilization rates of the ozone and the hydrogen peroxide are increased, and the wastewater treatment cost is reduced.
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10.发明授权公开(公告)号：US11458448B2
公开(公告)日：2022-10-04
申请号：US16764846
申请日：2018-04-20
申请人： NANJING UNIVERSITY , NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING
发明人： Chendong Shuang , Guang Zhang , Aimin Li , Ting Ye , Zheng Wang
摘要： A magnetic strong base anion exchange resin with high mechanical strength and a preparation method thereof, belonging to the field of resin materials. The preparation method comprises steps of: adding a conventional strong base anion exchange resin to a mixture of trivalent iron salt and divalent iron salt, and then mixing the resin adsorbed with the iron salt with aqueous ammonia so that Fe3O4 nanoparticles are contained in the resin structure. Then, the resin containing Fe3O4 nanoparticles is added to alcoholic solution dissolved with silane coupling agent to form a dense SiO2 coating on the surface of the resin, so as to obtain magnetic strong base anion exchange resin with high mechanical strength.
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