NATIONAL ACADEMY OF SCIENCES OF BELARUS INSTITUTE OF
NATIONAL ACADEMY OF SCIENCES OF BELARUS INSTITUTE OF PHYSICAL ORGANIC CHEMISTRY NEW MATERIALS FOR WATER PURIFICATION FROM NATURAL ORGANIC MATTERS G. V. Medyak, V. I. Sokolova, A. A. Shunkevich, A. V. Bildyukevich*
THE AIMS OF THЕ RESEARCH ARE: q COMPARATIVE STUDY OF GRANULAR ORGANIC SCAVENGERS AND FIBAN FIBROUS ION EXCHANGERS IN SURFACE WATER PURIFICATION FROM NATURAL ORGANIC MATTERS (NOM) q DEVELOPMENT OF NEW PLANT DESIGN ACCORDING TO PROPERTIES OF NEW MATERIALS
CHEMICALY ACTIVE TEXTILE MATERIALS FIBAN ADVANTAGES: q HIGH SPEED OF ION EXCHANGE, SORPTION AND CATALYTIC PROCESSES q POSSIBILITY TO USE THIN (2 -6 CM) FILTERING LAYERS q HIGH FLOW RATE q HIGH CHEMICAL RESISTANCE AND OSMOTIC STABILITY q POSSIBILITY OF MULTIPLE REGENERATIONS APPLICATIONS: q q Comparison of the ordinary granular and fibrous ion exchangers AIR PURIFICATION FROM TOXIC IMPURITIES IN INDUSTRY AND AGRICULTURE; SUPERFINE AIR PURIFICATION IN ELECTRONICS; INDIVIDUAL PROTECTIVE MEANS FOR HUMANS SKIN AND LUNGS; WATER PURIFICATION FROM HEAVY METALS, NITRATES, ARSENIC, ACIDS, DRINKING WARER PRODUCTION.
TEXTILE FORMS OF FIBROUS ION EXCHANGERS Yarn and cartridges Staple Nonwoven materials
MAIN CHARACTERISTICS OF ION EXCHANGERS Type of anion exchanger Matrix Basic functional groups Capacity, meqv/g Swelling , g H 2 O/g FIBAN А-5 gel PAN N(CH 3)2 5. 54 1. 50 FIBAN А-6 gel PAN (C 3 H 5 О)(CH 3)2 N+Cl-, N(CH 3)2 3. 23 1. 22 FIBAN А-7 gel PAN (C 2 H 4 OH)(CH 3)2 N+Cl-, N(CH 3)2 3. 45 1. 85 Purolite A-200 macroporous PS-DVB (CH 3)3 N+Cl- 4. 00 1. 20 Purolite A-501 gel PA-DVB N(CH 3)3+Cl- 3. 90 1. 50 Purolite A-860 S macroporous PA-DVB N(CH 3)3+Cl- 4. 00 1. 50 Amberlite IRA-900 macroporous PS-DVB N(CH 3)3+Cl- 4. 40 2. 10 PS – polystyrene, DVB – divinylbenzene, PA – polyacrylic matrix, PAN – polyacrylonitrile
EXPERIMENTAL q Water purification from NOM (humic and fulvic acids) was carried out using ion exchangers FIBAN and strong-base anion exchangers Purolite and Amberlite, recommended for water purification from organic matters q All tests were carried out in dynamic conditions: a column inner diameter 1. 2 cm, a bed height 4 -5 cm, 1. 2 g of dried to constant mass granular or finely cut fibrous ion exchangers q All ion exchangers were transformed into Cl-form q The maximum COD value in the purified water was considered to be 3 mg О/l.
WATER SOURCE* The Polota RIVER Color, grade COD, mg О/l The Western Dvina Content of Fe, ppb The Svisloch The Polota 80 -119 12 -15 0. 05 -0. 10 The Western Dvina 75 -106 14 -16 0. 08 -0. 09 The Svisloch 14 -23 4. 0 -4. 4 0. 01 -0. 02 *AFTER PRETREATMENT BY ULTRAFILTRATION BELARUS
BREAKTHROUGH CURVES OF NOM FOR FIBROUS AND GRANULAR ION EXCHANGERS IN PROCESS OF WATER PURIFICATION B The Western Dvina river flow rate 72 -80 BV/hour The Svisloch river flow rate 184 -197 BV/hour The Svisloch river flow rate 369 -393 BV/hour 1 – FIBAN А-5, 2 – Purolite A-860 S, 3 – FIBAN A-6, 4 – FIBAN A-7 Granular ion exchanger Purolite A-860 S can be comparative to fibrous ion exchangers FIBAN under the flow rate 80 BV/h, but when the flow rate is increased in 2. 5 and 5 times, the breakthrough of organic matters already occurs in the first portion of effluent
RESULTS OF PURIFICATION OF WATER FROM THE POLOTA AND THE SVISLOCH RIVERS FROM NOM BY FIBROUS AND GRANULAR ANION EXCHANGERS Type of anion exchanger COD of the initial water, mg О/l FIBAN А-7 15, 4 190 2 743 FIBAN А-5 11, 9 99 1 473 FIBAN А-6 11, 9 59 805 Purolite A-200 11, 9 0 0 Amberlite IRA-900 11, 9 0 0 Purolite A-501 11, 9 51 1 026 Purolite A-860 S 15, 4 141 1 807 FIBAN А-5 4, 0 46 3 365 Purolite A-860 S 4, 0 15 1 640 FIBAN А-5 4, 0 44 2 445 Purolite A-860 S 4, 0 0 0 Flow rate, BV/hour 72 -80 184 -197 369 -393 Dynamic capacity, mg О/g Volume of purified water, BV
BREAKTHROUGH CURVES (A) AND SORPTION HISTOGRAMS (B) OF NOM ONTO FIBROUS ION EXCHANGER FIBAN A-5 W IN CYCLES 1 - 5 Color, degree А B Color, degree 1 2 5 ВV cycle
THE MAIN ADVANTAGES OF FIBROUS ION EXCHANGERS FIBAN FOR WATER TREATMENT: q High speed of sorption and desorption of NOM q Deep water purification from NOM (up to COD 2 -3 mg О/l) at very high flow rates q Thin layers of ion exchange materials q Large filtration area in one apparatus q New constructional ideas using different textile forms of ion exchangers: staple, nonwoven materials, yarn, etc. THESE ADVANTAGES OF FIBROUS FIBAN ION EXCHANGERS MAKE THEM PROMISING FOR WATER PURIFICATION FROM NOM IN DIFFERENT BRANCHES OF INDUSTRY
APPLICATION OF FIBAN ION EXCHANGERS IN VARIOUS TEXTILE FORMS: STAPLE, NONWOVEN MATERIALS AND YARN Filter cartridge made from FIBAN A-5 W staple Cartridges made from FIBAN A-1 yarn and nonwoven materials
RESULTS OF THE POLOTA RIVER WATER PURIFICATION Cartridge type Flow rate, l/h COD of feed water, g. О/l Degree of purification onto COD, % Volume of purified water*, l 10”Cartridges made from FIBAN A-5 W yarn 180 18 72 153 260 18, 5 69 340 10”Cartridges made from nonwoven FIBAN A-5 W and yarn (10: 16) 210 16, 7 73 300 102 13, 2 82 900 10”Cartridges made from nonwoven FIBAN A-5 W 135 10, 4 71 1600 * up to COD = 3 mg. О/l
DESIGN OF THE INDUSTRIAL ION EXCHANGE MODULE STRIKER PEFORATED INNER TUBE FIBAN A-5 NONWOVEN MATERIAL SPACER FILTER SHELL CLAMP Shell head
RESULTS OF PURIFICATION OF THE INPUT WATER AT POLOTSK HPP BY HYBRID PROCESS: ULTRAFILTRATION / ION EXCHANGE INPUT WATER AFTER ULTRAFILTRATION WATER AFTER UF AND ANION EXCHANGE TREATMENT p. H 7, 86 -7, 89 7, 79 -7, 84 CONCENTRATION OF IRON, ppb 900 -1400 45 -53 43 COLOR, degree 255 -293 101 -120 1 TURBIDITY, mg/l 3, 2 -4, 35 0, 51 -0, 58 0 23, 79 19, 42 1, 8 -2, 0 CHARACTERISTICS COD, mg. О/l THE HYBRID PROCESS OF INPUT WATER PURIFICATION WAS SUGGESTED AND TESTED AT POLOTSK HPP. THE PROCESS INCLUDES DEAD-END ULTRAFILTRATION AND SORPTION BY STRONG-BASE FIBROUS ION EXCHANGER
DRAFT PROJECT OF THE INDUSTRIAL INSTALLATION BASED ON THE CREATED ELEMENT BASE WATER PURIFICATION PILOT PLANT
THANK YOU FOR YOUR ATTENTION
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