公开(公告)号：US20210198123A1

公开(公告)日：2021-07-01

申请号：US15930454

申请日：2020-05-13

申请人： Tongji University ,  Tianjin Polytechnic University

发明人： Zhiwei WANG ,  Yang LI ,  Hongwei ZHANG ,  Jie WANG ,  Xueye WANG

IPC分类号： C02F1/467 ,  C02F1/461

摘要： A flexible electrocatalytic membrane for removing nitrate from water, a preparation method and use thereof are provided. The method of the present invention includes dropwise adding an aramid fiber solution into deionized water to prepare an aramid nanofiber sol, then reacting an ethanol solution containing 3,4-ethylenedioxythiophene and ferric nitrate with the aramid nanofiber sol to prepare a conductive aramid nanofiber sol, and finally dropwise adding MXene nanosheets ultrasonically pretreated by a tetramethylammonium hydroxide solution into the conductive aramid nanofiber sol to prepare the flexible electrocatalytic membrane. The prepared flexible electrocatalytic membrane possesses good mechanical strength and flexibility, and can not only effectively remove nitrate but also avoid failure of electrocatalytic materials due to surface fouling in the process of electrocatalytic reduction of nitrate, and thus has a long service life.

公开(公告)号：US20210198122A1

公开(公告)日：2021-07-01

申请号：US16934054

申请日：2020-07-21

申请人： Tongji University ,  Tianjin Polytechnic University

发明人： Zhiwei WANG ,  Hongwei ZHANG ,  Liang WANG ,  Jiayi LI ,  Xueye WANG ,  Mei CHEN ,  Ruobin DAI

IPC分类号： C02F1/467 ,  C02F1/461 ,  C02F1/44 ,  B01D61/14 ,  B01D67/00 ,  B01D69/02 ,  B01D69/14

摘要： A device for decomplexation and enhanced removal of copper based on self-induced Fenton-like reaction constructed by electrochemistry coupled with membrane separation is disclosed. The device includes a reactor, two electrocatalytic anodes capable of generating hydroxyl radicals, an electrocatalytic cathode membrane assembly, a direct current power supply, an aeration system, an inlet pipe and an outlet pipe. The device of the present invention has a simple construction. Using this device to treat industrial wastewater containing copper complexes under specific conditions allows the decomplexation and the removal of the industrial wastewater containing the copper complexes to be simultaneously realized at a low consumption and a high efficiency. The coupling of electrochemistry with membrane separation can be achieved to protect the cathode from being contaminated by pollutants in the sewage and prolong the service life of the electrode.

公开(公告)号：US20170095775A1

公开(公告)日：2017-04-06

申请号：US15362991

申请日：2016-11-29

申请人： TONGJI UNIVERSITY

发明人： Zhiwei WANG ,  Mei CHEN ,  Xingran ZHANG ,  Xueye WANG ,  Junjian ZHENG ,  Chen PAN ,  Zhichao WU ,  Qiaoying WANG

IPC分类号： B01D67/00 ,  B01D69/06 ,  B01D69/02 ,  B01D71/34

CPC分类号： B01D67/0013 ,  B01D65/08 ,  B01D67/0011 ,  B01D67/0016 ,  B01D69/02 ,  B01D69/06 ,  B01D71/34 ,  B01D71/36 ,  B01D71/42 ,  B01D71/68 ,  B01D2323/12 ,  B01D2325/48 ,  C02F1/44

摘要： This invention provides a polymeric separation membrane that has excellent durable antibacterial effect and stain resistance, and a preparation method thereof. The polymeric separation membrane can be widely applied for water treatment, which belongs to the field of water treatment and membrane separation science and technology. The polymeric separation membrane containing quaternary ammonium salt is prepared by the immersion precipitation phase inversion method, using quaternary ammonium salt mixed with polymer and additives. This modification method effectively improves the antibacterial and antifouling ability of the polymeric separation membrane prolongs the service life of membranes and significantly inhibits the reproduction of bacterial and microbial. The preparation method has the advantages of simple process, easy operation, easy for promotion, and also avoids expensive equipment. The polymeric separation membrane has great antibacterial ability and stain resistance, therefore, it has potential application in the field of water treatment.

公开(公告)号：US20220219126A1

公开(公告)日：2022-07-14

申请号：US17326365

申请日：2021-05-21

申请人： Tongji University

发明人： Zhiwei WANG ,  Wei SHI ,  Huimin ZHOU ,  Xueye WANG

IPC分类号： B01D71/02 ,  B01D71/34 ,  B01D67/00 ,  B01D69/10 ,  B01D69/02 ,  B01D69/14 ,  C02F1/44

摘要： A zeolite membrane and a preparation method thereof are provided. The method includes: adding an organic binder solution dropwise to zeolite, and thoroughly grinding and stirring; blade-coating a resulting mixture on a substrate at a given thickness; and drying to obtain the zeolite membrane. The preparation of a zeolite membrane does not require a complicated hydrothermal crystal growth process, and the membrane can be prepared directly from natural zeolite or artificial zeolite. A prepared zeolite membrane has the characteristics of simple preparation process, low cost, prominent water permeability, high contaminant rejection rate and high zeolite load. The zeolite membrane, when used for the rejection of contaminants in water, can not only remove macromolecular contaminants in water, but also efficiently remove ammonia nitrogen by way of ion exchange, which is suitable for advanced treatment of wastewater.

公开(公告)号：US20170072366A1

公开(公告)日：2017-03-16

申请号：US15363203

申请日：2016-11-29

申请人： TONGJI UNIVERSITY

发明人： Qiaoying WANG ,  Jie WANG ,  Zhiwei WANG ,  Zhichao WU ,  Yanqiang MA ,  Xueye WANG ,  Chen PAN ,  Mei CHEN ,  Zimeng LI ,  Kaili YAN

IPC分类号： B01D61/00 ,  B01D65/08

CPC分类号： B01D61/002 ,  B01D65/08 ,  B01D2313/08 ,  B01D2313/16 ,  B01D2313/54

摘要： To provide a modified forward osmosis (FO) membrane module for flow regime improvement, the FO membrane module includes but not limited to: a water inlet; a water outlet; a forward osmosis (FO) membrane; a frame; and folded plates for improving flow regime in which draw solution is introduced into the water inlet of membrane module, then flowed through flow channels composed by three opposite folded plates vertically arranged on upper and bottom portions of the frame alternatively along horizontal direction with equal space; and drawn out from the water outlet. The flow regime improvement is achieved by increasing number of flow-guide folded plate, which results in the decrease of internal concentration polarization and membrane fouling. Structure of frame is modified to improve flow regime and to satisfy requirement of convenient and reliable connections between numbers of membrane modules in the FO membrane system.

摘要翻译： 为了提供用于流动状态改进的改进的正向渗透（FO）膜模块，FO膜模块包括但不限于：进水口; 出水口 正向渗透（FO）膜; 一个框架; 和折叠板，用于改善流动状态，其中将溶液引入膜组件的进水口，然后通过垂直布置在框架的上部和底部上的三个相对的折叠板组成的流动通道沿水平方向交替地相等空间流动; 并从出水口抽出。 通过增加导流板折叠板的数量来实现流动状态改善，这导致内部浓度偏振和膜污染的降低。 修改框架结构以改善流动状态，满足FO膜系统中膜组件数量之间方便可靠连接的要求。