A Fenton-like catalyst material with an electron-poor Cu center and a preparation method and use thereof are provided. The preparation method includes: step 1: dissolving bismuth nitrate pentahydrate in a nitric acid solution and diluting a resulting solution with deionized water to obtain a solution A; step 2: adding citric acid to the solution A and adjusting a pH of a resulting solution with ammonia water to obtain a solution B; step 3: dissolving aluminium isopropoxide (AIP), copper chloride dihydrate, and glucose in the solution B to obtain a suspension C; step 4: stirring the suspension C at a high temperature to allow evaporation until a solid D is completely precipitated; and step 5: subjecting the solid D to calcination in a muffle furnace to obtain the Fenton-like catalyst material. Under neutral conditions, the catalyst material exhibits a prominent removal effect for various toxic organic pollutants, especially for phenolic pollutants.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Wang, Jinnan
Hou, Zhiang
Bian, Weilin
Wang, Yi
Chu, Jiangfeng
Liu, Cong
Abstract
A photocatalytic material for efficient photocatalytic removal of a high-concentration nitrate, and a preparation method and use thereof are disclosed. The preparation method includes the following steps: step 1: preparation of a citrate-stabilized silver nanoparticle; step 2: synthesis and functionalization modification of SiO2 step 3: preparation of Ag/SiO2; and step 4: preparation of an Ag/SiO2@cTiO2 core-shell structure. The photocatalytic material prepared by the present disclosure has high reduction catalytic activity and can quickly remove a high-concentration nitrate and achieve high nitrogen selectivity. In addition, due to protection of a titanium dioxide shell, the photocatalytic material has excellent stability and can remove a high-concentration nitrate in water when the nitrate coexists with a high-concentration chloride ion.
Nanjing University & Yancheng Academy of Environmental Protection Technology And Engineering (China)
Inventor
Chen, Lifang
Qiu, Xin
Wang, Lian
Wang, Jinnan
Dai, Jianjun
Li, Aimin
Abstract
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.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Li, Shuangshuang
Li, Tong
Zhang, Guang
Li, Aimin
Wang, Ke
Wang, Juntian
Abstract
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.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Wang, Jinnan
Hou, Zhiang
Bian, Weilin
Wang, Yi
Chu, Jiangfeng
Liu, Cong
Abstract
22222 core-shell structure. The photocatalytic material prepared in the present invention is high in reduction catalytic activity, and can rapidly remove the high-concentration nitrates and achieve a high nitrogen selectivity. Meanwhile, due to the protection of a titanium dioxide shell, the material has a good stability and can remove high-concentration nitrates from water due to the coexistence of high-concentration chloride ions.
2 3 3 nanoparticles are uniformly distributed in a porous carbon layer structure, can effectively remove all kinds of organic toxic pollutants, especially phenol pollutants, under neutral conditions, and can achieve high-selectivity conversion of PMS.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Chen, Lifang
Dai, Jianjun
Qiu, Xin
Wang, Lian
Gao, Jingjing
Li, Aimin
Abstract
The present invention relates to the field of wastewater treatment of environmental protection, and disclosed in the present invention are a multi-stage advanced oxidation treatment apparatus and process for wastewater. The apparatus comprises a liquid-liquid mixing unit, a preheating unit, a gas-liquid mixing unit, a parallel photocatalytic reactor group, and an oxidation tower which are connected in sequence, wherein the liquid-liquid mixing unit is used for mixing wastewater to be treated and hydrogen peroxide; the preheating unit is used for preheating a mixed solution of said wastewater and the hydrogen peroxide; the gas-liquid mixing unit is used for mixing ozone at normal temperature and the preheated mixed solution of said wastewater and the hydrogen peroxide to form a gas-liquid mixture; and a plurality of photocatalytic reactors are provided in the parallel photocatalytic reactor group. The apparatus reasonably designs the parallel photocatalytic reactor group and the oxidation tower according to the characteristics of free radical reaction, so that the utilization rate of the ozone and the hydrogen peroxide is improved, and wastewater treatment costs are reduced.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shi, Peng
Zhang, Huaicheng
Li, Aimin
Chang, Fangyu
Zhou, Qing
Shuang, Chendong
Li, Qimeng
Pan, Yang
Abstract
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.
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.
C08F 8/44 - Preparation of metal salts or ammonium salts
C08F 220/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
C08F 226/06 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
C08F 224/00 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen
Nanjing University & Yancheng Academy Of Environmental Protection Technology And Engineering (China)
Inventor
Shi, Peng
Cao, Xun
Ding, Xinchun
Li, Aimin
Dai, Jianjun
Zhang, Xiao
Peng, Xiang
Li, Dongmei
Li, Yinsen
Tang, Jiali
Abstract
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.
B01J 49/09 - Regeneration or reactivation of ion-exchangersApparatus therefor of fixed beds of mixed beds
B01J 49/90 - Regeneration or reactivation of ion-exchangersApparatus therefor having devices which prevent back-flow of the ion-exchange mass during regeneration
C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
C02F 1/38 - Treatment of water, waste water, or sewage by centrifugal separation
B01J 49/60 - Cleaning or rinsing ion-exchange beds
11.
Fenton-like catalytic material with dual reaction centers and preparation method thereof
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Yang, Mengqian
Wang, Juntian
Li, Aimin
Abstract
The present invention relates to the field of resin regeneration and relates to a method for efficiently regenerating a resin by using an electrolytic salt solution. The method for efficiently regenerating a resin by using an electrolytic salt solution as provided by the present invention comprises the following steps: (1) after carrying out electrolytic reaction on an NaCl solution having a mass concentration of 1%-20% by using a voltage of 1-30 V, obtain an electrolytic solution; (2) introducing the electrolytic solution from a bottom part of a resin column filled with an ion exchange resin, and backwashing the filled ion exchange resin to obtain a resin desorption solution; and (3) carrying out an electrochemical reaction on the resin desorption solution to obtain an effluent, the effluent being introduced from the bottom part of the resin column, the filled ion exchange resin being backwashed, and a waste liquid after backwashing undergoing an electrochemical reaction; a cyclical reaction is performed as such. The method for regenerating a resin according to the present invention has a high nitrate nitrogen removal efficiency of up to 85%-100%, and the re-adsorption capacity of a regenerated resin is 80%-95% of the saturated adsorption capacity of the resin before regeneration.
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/30 - Processes for preparing, regenerating or reactivating
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Zhang, Guang
Ye, Ting
Li, Aimin
Tan, Liang
Wang, Ke
Abstract
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.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Li, Shuangshuang
Li, Tong
Zhang, Guang
Li, Aimin
Wang, Ke
Wang, Juntian
Abstract
344 powder, magnetizing the mixture in a magnetic field to prepare magnetized powder; (2) adding the magnetized power directly into a water treatment reaction vessel or preparing the magnetized power into granular fillers and then adding the same into a water treatment reaction vessel; and (3) allowing water to be treated to enter the water treatment reaction vessel, and performing chemical reaction of removing nitrate nitrogen and inorganic phosphorus in the presence of a reducing agent, and discharging the water after the reaction.
Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering (China)
Inventor
Shuang, Chendong
Zhou, Weiwei
Wang, Yunshu
Li, Aimin
Li, Qimeng
Liu, Lili
Wang, Wei
Zhang, Yi
Abstract
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.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shi, Peng
Zhang, Huaicheng
Li, Aimin
Chang, Fangyu
Zhou, Qing
Shuang, Chendong
Li, Qimeng
Pan, Yang
Abstract
Disclosed is a composite functional resin having the basic structure of formula (Ⅰ) and/or formula (Ⅱ), wherein the AX is a quaternary ammonium group. With regard to the problem of existing resins having, during sterilization, a poor anti-interference ability and poor ability of removing dissolved organic matter in water, precursors of sterilization by-products, and anions, such as nitrate, sulfate, phosphate, arsenate, etc., the composite functional resin has the ability of also efficiently removing dissolved organic matter in water, precursors of sterilization by-products, and anions, such as nitrate, sulfate, phosphate, arsenate, etc., and has the advantages of an efficient sterilization ability and a strong anti-interference ability. The composite functional resin can be applied in sterilization and water treatment.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Zhang, Guang
Ye, Ting
Li, Aimin
Tan, Liang
Wang, Ke
Abstract
Disclosed is a method for promoting denitrification through magnetic resin to remove nitrate nitrogen from water. In the method, a magnetic anion exchange resin is in contact with and mixed with sewage, and by means of the dual effects of an ion exchange between the magnetic anion exchange resin and nitrate nitrogen in the sewage and denitrification being enhanced by the magnetic material, the quick and efficient removal of the nitrate nitrogen from the sewage is realized, and at the same time, the regeneration and reuse of the magnetic anion exchange resin are realized by means of the denitrification of microorganisms. The method can shorten the amount of time that sewage stays in a reactor, and at the same time, can also reduce the volume of the reactor and improve the removal effect of the nitrate nitrogen from the sewage.
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shuang, Chendong
Zhang, Guang
Li, Aimin
Ye, Ting
Wang, Zheng
Abstract
A strong alkaline anion exchange resin having high mechanical strength and magnetism, and a preparation method therefor belong to the field of resin materials. The preparation method comprises adding a traditional strong alkaline anion exchange resin to a mixed solution of a trivalent iron salt and a divalent iron salt, and then mixing the resin adsorbed with the iron salts with aqueous ammonia, so that the resin structure comprises ferroferric oxide nanoparticles. Then, the resin comprising ferroferric oxide nanoparticles is added to an alcohol solution dissolved with a silane coupling agent for reaction, so that the surface of the resin has a dense silica encapsulation layer, thereby obtaining a strong alkaline anion exchange resin having high mechanical strength and magnetism. The mechanical strength of the synthesized magnetic resin is significantly improved, the sphericity after milling can reach 95% or more, and the synthesized magnetic resin has a stronger magnetic property, a higher wet true density and sedimentation rate, and a larger strong alkaline anion exchange capacity. In addition, the resin also has certain acid resistance and can be widely used for the removal of anionic contaminants in water and wastewater.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
21.
ION EXCHANGE RESIN PACKED-BED COUNTERCURRENT REGENERATION DEVICE AND USE METHOD THEREOF
NANJING UNIVERSITY & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (China)
Inventor
Shi, Peng
Cao, Xun
Ding, Xinchun
Li, Aimin
Dai, Jianjun
Zhang, Xiao
Peng, Xiang
Li, Dongmei
Li, Yinsen
Tang, Jiali
Abstract
An ion exchange resin packed-bed countercurrent regeneration device and a use method thereof. The regeneration device comprises a cyclone separator (1), a regeneration reactor (2), a continuous-stirred resin reactor (3), a desorption liquid storage tank (4), and a regeneration agent storage tank (5). The cyclone separator (1) is disposed at the top of the regeneration reactor (2). An upper portion of the cyclone separator (1) communicates with the continuous-stirred resin reactor (3). The bottom of the cyclone separator (1) is provided with a resin inlet. A resin bed (6) and a resin filter (9) are disposed inside the regeneration reactor (2). A resin outlet (20) and a regeneration agent inlet (14) are disposed at the bottom of the regeneration reactor (2). The resin outlet (20) communicates with the continuous-stirred resin reactor (3). The regeneration agent inlet (14) communicates with the desorption liquid storage tank (4) and the regeneration agent storage tank (5) separately. A regeneration agent outlet (13) is further provided at one side of the regeneration reactor (2). The regeneration agent outlet (13) communicates with the desorption liquid storage tank (4). The separator and countercurrent effectively improve resin regeneration efficiency, reduce desorption liquid output, and avoid mechanical wear by the resin. The regeneration device of the invention can be used in large-scale ion exchange resin application engineering.
B01J 49/05 - Regeneration or reactivation of ion-exchangersApparatus therefor of fixed beds
22.
Hydrophilic magnetic resin with high specific area, preparation method therefor and application method thereof for rapidly extracting phthalates in water body
Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering (China)
Inventor
Zhou, Qing
Zhang, Mancheng
Li, Aimin
Shuang, Chendong
Wang, Mengqiao
Wang, Wei
Huang, Congjian
Jiang, Jingyi
Li, Haibo
Abstract
Implementations herein relate to a method for extraction of phthalates using hydrophilic magnetic resins with high specific surface areas. The implementations relate to a technical field of preparation of resins for fast enrichment and separation of trace organics in water. By adding magnetic particles, precursor resins may be prepared using divinylbenzene, vinyl benzoate and glycidyl methacrylate copolymerization ester. After the cross-linking reaction, surface areas of the resins are increased and hydrolysis of the ester group in alkaline solution may be implemented to obtain high specific surface magnetic resins rich in hydroxyl groups. The resins have higher adsorptive capacity and selectivity to adsorb phthalates in water samples. Rapid extraction may be implemented using magnetic solid phase extraction rod to achieve enrichment and separation of phthalates in a large amount of water samples.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/48 - Treatment of water, waste water, or sewage with magnetic or electric fields
B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering (China)
Inventor
Li, Aimin
Xu, Zixiao
Jiang, Bicun
Shuang, Chendong
Zhou, Qing
Li, Wentao
Ding, Xinchun
Jiang, Yeli
Wang, Mengqiao
Shen, Ke
Zhou, Weiwei
Abstract
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.
patents
