Both phosphonateand polymer-based scale inhibitors have a broad spectrum of applications in water treatment technologies. However, the “online” monitoring of antiscalant content in an aqueous phase is still a challenge for researchers. A possible solution is provided by the fluorescent markers added to the feeding water. These can be either an antiscalant tagged or may represent the independent species. The review summarizes both the advantages and the drawbacks of these approaches along with such markers’ classification, with a special emphasis on the novel fluorescent-tagged phosphonates. Besides, some unique opportunities provided by the fluorescent-tagged antiscalants for reverse osmosis membrane mapping, scale inhibition traceability, and a scale inhibitor localization in a circulation water facility are also considered and discussed.

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Fluorescent Markers in Water Treatment

The invention discloses an ultraviolet and fluorescent dual-tracing concrete admixture The ultraviolet and fluorescent dual-tracing concrete admixture is obtained by performing a free radical polymerization reaction on an allyloxy polyvinyl ether monomer or a blocked allyloxy polyvinyl ether monomer, an unsaturated carboxylic acid monomer or an unsaturated carboxylic acid anhydride monomer and an unsaturated double bond-containing water-soluble fluorescent monomer, wherein the unsaturated double bond-containing water-soluble fluorescent monomer is 4-(N'-methyl-1-piperazinyl)-N-hydroxyethyl-1,8-naphthal allyl ammonium chloride or 4-(N'-hydroxyethyl-piperazinyl)-N-hydroxyethyl-1,8-naphthal allyl ammonium chloride Raw materials for synthesizing a polymer are non-toxic and harmless, so that the characteristic of clean production is met; when the polymer is used as a water-reducing agent, a polymer product can be directly used without being separated; the polymer product has a relatively small addition amount as well as excellent dispersion with relatively high mobility, and the advantage of the relatively small solid addition amount can greatly reduce the cost and increase economic benefits, so that the polymer product is suitable for market promotion

Ultraviolet and fluorescent dual-tracing concrete admixture and preparation method thereof

The invention discloses a method for detecting the content of compound water treatment agent in industrial circulating cooling water by adopting fluorescent tracer. Disodium 4,4'-bis(2-sulfostyryl) biphenyl fluorescent tracer and the water treatment agent containing acrylic acid-hydroxypropyl acrylate-AMPS copolymer and hydrolytic polymaleic anhydride are blended, so that fluorescence-labeled compound water treatment standard additive is prepared, the mass concentration of the acrylic acid-hydroxypropyl acrylate-AMPS copolymer and the hydrolytic polymaleic anhydride of the fluorescence-labeled compound water treatment standard additive is 2.5kg/M3, 40g/M3 to 50g/M3 of fluorescence-labeled compound water treatment standard additive is added into industrial circulating cooling water and industrially circulated, and if the measured fluorescence value is less than 5470 plus or minus 100, then the fluorescence-labeled compound water treatment standard additive needs to be added. The content of the compound water treatment agent can be quantitatively monitored according to the fluorescence intensity of the circulating cooling water, so that the compound water treatment agent can be conveniently added in real time in order to guarantee the scale inhibition effect of a circulating cooling water system.

Method for detecting content of water treatment agent by adopting fluorescent tracer

The invention discloses a surface functionalized graphene material, a preparation method thereof, a detection method and a sensor. The preparation method comprises the following steps that oxidized graphene raw materials are subjected to freeze drying, and thus oxidized graphene powder is prepared; the oxidized graphene powder is dissolved in deionized water, formed first mixed liquid is subjectedto ultrasonic oscillation; thiourea or urea is added into each part of first mixed liquid, and thus second mixed liquid is formed and stirred; the second mixed liquid is subjected to hydrothermal reaction; the second mixed liquid subjected to the hydrothermal reaction is cooled to the room temperature firstly, and then sequentially subjected to centrifugation and washing with water, thus third mixed liquid is obtained, the third mixed liquid is subjected to vacuum drying, and thus a sulfur-doped graphene material or a nitrogen-doped graphene material is prepared. Thiourea or urea is utilizedto conduct surface controllable functionalization on oxidized graphene, thus functional groups are introduced into the surface of the oxidized graphene, the complexing effect of the functionalized graphene material and mercury ions in the water environment is improved, and the capacity of electrochemical response to the mercury ions is improved.

Surface functionalized graphene material, preparation method thereof, detection method and sensor

The invention discloses application of a fluorescently-labeled phosphino-acrylic acid and itaconic acid copolymer. The fluorescently-labeled phosphino-acrylic acid and itaconic acid copolymer is prepared by the steps of subjecting raw materials, including 4-bromine-1,8-naphthalic anhydride, ethanol and N,N-dimethyl-1,3-propylenediamine, to reaction to obtain 4-bromo-N-(3-N',N'-dimethylaminopropyl)-1,8-naphthalimide, reacting a mixed solution of the ethanol and ethylene glycol methyl ether with n-butylamine to obtain a product, reacting the product with allyl chloride to obtain 4-butylamino-N-(3-N',N'-dimethylaminopropyl)naphthalimide allyl chloride ammonium, and copolymerizing fluorescent monomers with sodium hypophosphite, itaconic acid and acrylic acid through one-step aqueous phase synthesis. The fluorescently-labeled phosphino-acrylic acid and itaconic acid copolymer has the advantages of easiness in acquisition of the raw materials and simplicity and convenience in preparation, and has fluorescent tracing, corrosion inhibition and scale inhibition functions.

Application of fluorescently-labeled phosphino-acrylic acid and itaconic acid copolymer

The present invention discloses a fluorescence labeled acroleic acid-sodium allylsulfonate copolymer and a method for preparing the same. The method comprises the following steps: 4-bromine-1,8-naphthalic anhydride, methylamine, N-methyl diethylenediamine, and the like are used as material and is subject to amidation reaction, amination reaction, and quaternization reaction to be synthesized, anda novel fluorescence monomer 4-(N'-methyl-1-diethylenediamine)-N-methyl-1,8-naphthalimide allyl chloride quaternary ammonium salt is obtained by synthesis; and then the fluorescence monomer is copolymerized with sodium hypophosphite, acroleic acid and sodium allylsulfonate to obtain the FC-AA-SAS product. The raw materials for synthesizing the fluorescence monomer and the polymer are easy to obtain and the reaction conditions are mild. When the product is used in circulating water, the thickness of a medicament in a circulating water system can be accurately, duly and quickly measured throughthe variation of the fluorescence intensity, and the on-line medicine addition and the quantitative control are realized. Therefore, the on-site operation is largely simplified, and the management level is improved. The functional groups, such as sulfonic group, phosphino group and the like, are introduced into molecules, and thus the polymer has a plurality of functions, such as fluorescent tracing, anti-precipitation, disgregation and the like.

Fluorescence labeling acrylic acid-sodium acrylic sulphonate co-polymer water treatment agent and preparation method thereof

The invention discloses a polycarbazole/nitrogen-doped graphene (PCZ/N-GE) modified electrode, a preparation method and application of the polycarbazole/nitrogen-doped graphene modified electrode. The polycarbazole/nitrogen-doped graphene modified electrode comprises a glassy carbon electrode as a substrate, a conducting polymer polycarbazole and nitrogen-doped graphene. According to the polycarbazole/nitrogen-doped graphene modified electrode, a PCZ/N-GE modified glassy carbon electrode is obtained by adopting a dispensing and polymerizing two-step method, so that two components, namely PCZ and N-GE, generate a remarkable synergistic effect to have a relatively high catalysis function to the reduction of paranitrophenol, and the reduction potential is increased remarkably. Used raw materials are easily available, and the dosage of chemicals is few. According to the preparation method, simplicity and rapidness are realized, and the repeatability is good. The prepared PCZ/N-GE modified electrode is good in environmental stability.

Polycarbazole/nitrogen-doped graphene modified electrode, preparation method and application of polycarbazole/nitrogen-doped graphene modified electrode

The invention discloses a fluorescently labeled phosphino-acrylic acid itaconic acid copolymer, and a preparation method and a purpose thereof. 4-bromo-1,8-naphthalic anhydride, ethyl alcohol and N,N-dimethyl 1,3-propane diamine are used as raw materials to obtain 4-bromo-N-(3-N',N'-dimethylamino propyl)-1,8-naphthalimide through reaction; then, ethanol and ethylene glycol monomethyl ether are used as a mixed solvent to take a reaction with n-butylamine to obtain a product; next, the product takes a reaction with allyl chloride to obtain 4-butyl amino-N-(3-N',N'-dimethylamino propyl) naphthalimide allylamine hydrochloride; next, fluorescent monomers, sodium hypophosphite, itaconic acid and acrylic acid are subjected to co-polymerization by a water phase one-step synthesis method to obtain the fluorescently labeled phosphino-acrylic acid itaconic acid copolymer. The fluorescently labeled phosphino-acrylic acid itaconic acid copolymer has the advantages that the raw materials can be easily obtained; the preparation method is simple and convenient; various functions such as a fluorescent tracing function, a corrosion inhibition function and a scale inhibition function are realized.

Fluorescently labeled phosphino-acrylic acid itaconic acid copolymer, and preparation method and purpose thereof

The invention discloses application of a fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of a water treatment agent. A preparation method of the fluorescent tracer type itaconic acid and aspartic acid copolymer comprises the steps of using 4-bromine-1,8-naphthalic anhydride, ethanol and N, N-dimethyl 1, 3-propane diamine as raw materials to obtain 4-bromine-N-(3-N', N'-dimethyl aminopropyl)-1, 8-naphthalimide first; and then using ethanol and ethylene glycol methyl ether as a mixed solvent to react with n-butylamine so as to obtain a product; enabling the product to react with allyl chloride to obtain 4-butylamino-N-(3-N', N'-dimethyl aminopropyl) naphthalimide diallyl ammonium chloride; and using a water-phase one-step synthesis method to copolymerize a fluorescent monomer FT, itaconic acid and aspartic acid to obtain a product. The application of the fluorescent tracer type itaconic acid and aspartic acid copolymer in the preparation of the water treatment agent, disclosed by the invention, has the advantages that a target has multiple functions such as a fluorescent tracer function and a scale inhibition and dispersion function, the formed scaleis easy to be flushed away by water, and better dispersion performance is shown.

Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent

The invention discloses a polycarbazole / nitrogen-doped graphene modified electrode, and a preparation method and application thereof. The electrode comprises a substrate of a glassy carbon electrode, a conductive polymer polycarbazole and nitrogen-doped graphene. The present invention uses a two-step method comprising dispensing and polymerization to obtain a PCZ / N-GE modified glassy carbon electrode, so the two components PCZ and N-GE produce a more pronounced synergistic effect to have strong catalysis on reduction of p-nitrophenol and significantly increased reduction potential. The invention has the advantages of easily available raw materials, small usage amount of medicines, and simpleness, rapidness and reproducibility of the preparation method; and the prepared electrode has good environmental stability.

Zhang Qiping

Papers

Fluorescence labeling acrylic acid-sodium acrylic sulphonate co-polymer water treatment agent and preparation method thereof

Polycarbazole/nitrogen-doped graphene modified electrode, preparation method and application of polycarbazole/nitrogen-doped graphene modified electrode

Fluorescently labeled phosphino-acrylic acid itaconic acid copolymer, and preparation method and purpose thereof

Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent

Application of polycarbazole / nitrogen-doped graphene modified electrode