NEW MATERIALS FOR WATER PURIFICATION FROM NATURAL

ORGANIC MATTERS

NATIONAL ACADEMY OF SCIENCES OF BELARUSINSTITUTE OF PHYSICAL ORGANIC CHEMISTRY

G.V. Medyak, V.I. Sokolova, A.A. Shunkevich, A.V. Bildyukevich*

COMPARATIVE STUDY OF GRANULAR

ORGANIC SCAVENGERS AND FIBAN FIBROUS ION EXCHANGERS IN SURFACE WATER PURIFICATION FROM NATURAL ORGANIC MATTERS (NOM)

DEVELOPMENT OF NEW PLANT DESIGN ACCORDING TO PROPERTIES OF NEW MATERIALS

THE AIMS OF THЕ RESEARCH ARE:

ADVANTAGES:

Comparison of the ordinary granular and fibrous ion

exchangers

HIGH SPEED OF ION EXCHANGE, SORPTION AND CATALYTIC PROCESSES

POSSIBILITY TO USE THIN (2-6 CM) FILTERING LAYERS

HIGH FLOW RATE HIGH CHEMICAL RESISTANCE AND OSMOTIC

STABILITY POSSIBILITY OF MULTIPLE REGENERATIONS

CHEMICALY ACTIVE TEXTILE MATERIALS FIBAN

APPLICATIONS: 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

Staple Nonwoven materials

Yarn and cartridges

Type of anion exchanger Matrix Basic functional

groupsCapacity,

meqv/gSwelling ,g H2O/g

FIBAN А-5 gel PAN N(CH3)2 5.54 1.50

FIBAN А-6 gel PAN

(C3H5О)(CH3)2 N+Cl-, N(CH3)2

3.23 1.22

FIBAN А-7 gel PAN

(C2H4OH)(CH3)2 N+Cl-, N(CH3)2

3.45 1.85

Purolite A-200macroporous PS-DVB (CH3)3 N+Cl- 4.00 1.20

Purolite A-501gel PA-DVB N(CH3)3

+Cl- 3.90 1.50

Purolite A-860Smacroporous PA-DVB N(CH3)3

+Cl- 4.00 1.50

Amberlite IRA-900macroporous PS-DVB N(CH3)3

+Cl- 4.40 2.10

MAIN CHARACTERISTICSOF ION EXCHANGERS

PS – polystyrene, DVB – divinylbenzene, PA – polyacrylic matrix, PAN – polyacrylonitrile

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

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

All ion exchangers were transformed into Cl-form The maximum COD value in the purified water was considered to be

3 mg О/l.

EXPERIMENTAL

WATER SOURCE*

RIVERColor, grade

COD, mg О/l

Content of Fe, ppb

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

The PolotaThe Western Dvina

The Svisloch

BELARUS

0

3

6

0 500 1000 1500 2000 2500 3000 3500

COD, mg O/l

BV

1

2

3

4

0

3

6

0 1000 2000 3000 4000

COD, mg O/l

BV

1

2

3

BREAKTHROUGH CURVES OF NOM FOR FIBROUS AND GRANULAR ION EXCHANGERS IN PROCESS

OF WATER PURIFICATION

0

3

6

0 500 1000 1500 2000 2500 3000

COD, mg O/l

BV

1

2

3B

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

Granular ion exchanger Purolite A-860S 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

1 – FIBAN А-5, 2 – Purolite A-860S, 3 – FIBAN A-6, 4 – FIBAN A-7

Type of anion exchangerCOD of the

initial water, mg О/l

Flow rate, BV/hour

Dynamic capacity, mg О/g

Volume of purified water,

BV

FIBAN А-7 15,4

72-80

190 2 743FIBAN А-5 11,9 99 1 473FIBAN А-6 11,9 59 805

Purolite A-200 11,9 0 0Amberlite IRA-900 11,9 0 0

Purolite A-501 11,9 51 1 026Purolite A-860S 15,4 141 1 807

FIBAN А-5 4,0184-197

46 3 365Purolite A-860S 4,0 15 1 640

FIBAN А-5 4,0369-393

44 2 445Purolite A-860S 4,0 0 0

RESULTS OF PURIFICATION OF WATER FROM THE POLOTA AND THE SVISLOCH RIVERS FROM NOM BY FIBROUS AND

GRANULAR ANION EXCHANGERS

BREAKTHROUGH CURVES (A) AND SORPTION HISTOGRAMS (B) OF NOM ONTO FIBROUS ION

EXCHANGER FIBAN A-5W IN CYCLES 1 - 5

0 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0

0

5

1 0

1 5

2 0

2 5

3 0

3 5

ВV

21

5

Color, degree А BColor, degree

0

200

400

600

800

1000

1200

1400

1600

1800

2000

1 2 3 4 5

cycle

High speed of sorption and desorption of NOM Deep water purification from NOM (up to COD 2-3 mg

О/l) at very high flow rates Thin layers of ion exchange materials Large filtration area in one apparatus New constructional ideas using different textile forms of

ion exchangers: staple, nonwoven materials, yarn, etc.

THE MAIN ADVANTAGES OF FIBROUS ION EXCHANGERS FIBAN FOR WATER TREATMENT:

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-5W staple

Cartridges made from FIBAN A-1yarn and nonwoven materials

Cartridgetype

Flow rate, l/h

COD of feed

water, gО/l

Degree of purification

onto COD, %

Volume of purified water*,l

10”Cartridges made from FIBAN A-5W yarn

180 18 72 153260 18,5 69 340

10”Cartridges made from nonwoven FIBAN A-5W and yarn (10:16)

210 16,7 73 300102 13,2 82 900

10”Cartridges made from nonwoven FIBAN A-5W

135 10,4 71 1600

RESULTS OF THE POLOTA RIVER WATER PURIFICATION

* up to COD = 3 mgО/l

DESIGN OF THE INDUSTRIAL ION EXCHANGE MODULE

FIBAN A-5 NONWOVEN MATERIAL

SPACER

STRIKER

PEFORATED INNER TUBE

FILTER SHELL

CLAMP

Shell head

RESULTS OF PURIFICATION OF THE INPUT WATER AT POLOTSK HPP BY HYBRID PROCESS:

ULTRAFILTRATION / ION EXCHANGE

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

CHARACTERISTICS INPUT WATER WATER AFTERULTRAFILTRATION

WATER AFTER UF AND ANION EXCHANGE

TREATMENT

pH 7,86-7,89 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

COD, mgО/l 23,79 19,42 1,8-2,0

WATER PURIFICATION PILOT PLANT

DRAFT PROJECT OF THE INDUSTRIAL INSTALLATION BASED ON THE CREATED

ELEMENT BASE

THANK YOU FOR YOUR ATTENTION