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

IPC分类号： C02F1/48 ,  C02F1/70

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.

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.

公开(公告)号：US20200339459A1

公开(公告)日：2020-10-29

申请号：US16764847

申请日：2018-04-20

申请人： NANJING UNIVERSITY ,  NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY

发明人： Chendong SHUANG ,  Guang ZHANG ,  Ting YE ,  Aimin LI ,  Liang TAN ,  Ke WANG

IPC分类号： C02F9/00

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.

公开(公告)号：US20200338523A1

公开(公告)日：2020-10-29

申请号：US16764846

申请日：2018-04-20

申请人： NANJING UNIVERSITY ,  NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROCTION TECHNOLOGY

发明人： Chendong SHUANG ,  Guang ZHANG ,  Aimin LI ,  Ting YE ,  Zheng WANG

IPC分类号： B01J20/02 ,  B01J41/10 ,  B01J20/30 ,  B01J20/28 ,  B01J20/26 ,  C02F1/42

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.

公开(公告)号：US20150291449A1

公开(公告)日：2015-10-15

申请号：US14412218

申请日：2013-03-27

申请人： Nanjing University ,  Nanjing University Yancheng Environmental Protection Tech. & Engineering Research Institute

发明人： Aimin LI ,  Lichun FU ,  Fuqiang LIU ,  Qing ZHOU ,  Jianjun DAI ,  Zhaoyang LU ,  Yan LI ,  Chendong SHUANG ,  Jinnan WANG ,  Weiwei ZHAO

IPC分类号： C02F1/461

CPC分类号： C02F1/461 ,  C02F1/285 ,  C02F1/42 ,  C02F1/5245 ,  C02F3/06 ,  C02F9/00 ,  C02F2101/20 ,  C02F2101/22 ,  C02F2103/16 ,  C02F2201/46105 ,  Y02W10/15

摘要： An efficient combined advanced treatment method of electroplating wastewater is disclosed, which belongs to the technical field of electroplating wastewater treatment. The method includes: after pretreatments including cyanide breaking, dechromisation and coagulating sedimentation, introducing the electroplating wastewater to a contact oxidation tank for biochemical treatment, and settling the effluent from the contact oxidation tank down in an inclined pipe of a secondary sedimentation tank to realize the separation of the sludge from water; charging the effluent to a coagulating sedimentation tank, and undergoing coagulating sedimentation with the aid of a flocculant and a coagulant aid added; feeding the effluent, as an influent, to a resin adsorption tank for adsorption with a magnetic resin; and after passing through a filter, flowing the effluent after adsorption to a fixed bed resin adsorption unit, so as to realize the discharge up to standard and recycle of the effluent.

摘要翻译： 公开了一种电镀废水处理技术领域的高效组合电镀废水处理方法。 该方法包括：预处理包括氰化物破坏，脱色和凝结沉淀，将电镀废水引入接触氧化槽进行生化处理，并将接触氧化槽的废水沉淀在二次沉淀池的倾斜管道内，实现 污泥与水分离; 将污水装入凝结沉淀池，并借助絮凝剂和助凝剂进行凝结沉淀; 将作为流入物的流出物供给用于用树脂吸附的树脂吸附罐; 通过过滤器后，吸附后将流出物流入固定床树脂吸附单元，达到标准排放，再循环排出。

公开(公告)号：US20200316562A1

公开(公告)日：2020-10-08

申请号：US16954210

申请日：2018-01-11

申请人： NANJING UNIVERSITY

发明人： Qing ZHOU ,  Zhijian YAO ,  Aimin LI ,  Wei JIAO ,  Chendong SHUANG ,  Qimeng LI ,  Jie SUN

IPC分类号： B01J20/26 ,  B01J20/28 ,  B01J20/06 ,  B01J20/22 ,  B01J20/30 ,  C02F1/28 ,  C02F1/48

摘要： A magnetic polymer adsorption material, preparation method and use thereof, which relate to the field of magnetic polymer materials. The preparation method comprises: (1) preparing magnetic nanoparticles; (2) dissolving the magnetic nanoparticles in a pore-forming agent, adding N-vinylpyrrolidone, divinylbenzene and an initiator respectively, and mixing uniformly; (3) adding an emulsifier and a dispersant into an aqueous solution; adding a part of the oil phase solution prepared in step (2) at the temperature below 60° C., and adding the rest of the oil phase solution when the temperature rises to 60° C. or above, reacting with stirring, precipitating and filtering the reacted solution, washing and drying the precipitate, and finally obtaining the magnetic polymer adsorption material. The material has the particle size of 2-100 μm, the magnetization of 5-19.5 emu/g and the specific surface area of 210-950 m2/g, and can be applied to the adsorption of inorganic and organic matters in solutions, the controlled release of inorganic and organic matters, and the separation of different substances.

公开(公告)号：US20140367331A1

公开(公告)日：2014-12-18

申请号：US14308616

申请日：2014-06-18

申请人： Nanjing University

发明人： Aimin LI ,  Zixiao XU ,  Wentao LI ,  Bicun JIANG ,  Qing ZHOU ,  Chendong SHUANG ,  Yeli JIANG ,  Mengqiao WANG

IPC分类号： C02F3/12

CPC分类号： C02F3/12 ,  C02F1/442 ,  C02F1/444 ,  C02F1/5245 ,  C02F1/66 ,  C02F1/722 ,  C02F9/00 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/02 ,  C02F2209/03 ,  C02F2209/10 ,  C02F2209/22 ,  C02F2303/16 ,  C02F2305/06 ,  Y02W10/15

摘要： Provided is a method for resourceful utilization of desorption liquid generated in the resin ion exchange process. This method effectively separates highly-concentrated organics and salts from the desorption liquid and puts these two components into comprehensive utilization.

摘要翻译： 提供了一种在树脂离子交换过程中产生的解吸液的有效利用的方法。 这种方法有效地将高浓度有机物和盐与解吸液分离，并将这两个组分综合利用。