BAKU  MAY 20 – 25, 2013

SORPTION OF URANYL-IONS FROM WATER SOLUTIONS

BY PHOSPHORYLATED WOOD SAWDUST

Jalal Naghiyev, Adil Garibov Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

B. Vahabzada, str. 9, Phone: (+994 12) 539 33 89,

E-mail: calalnaghiyev@mail.ru

New Challenges in the European Area: Young Scientist’s 1st International Baku Forum

Ministry of Youth and Sports of Azerbaijan Republic

Relevance of research

• Like other oil-producing territory of the Republic of Apsheron oil-producing contaminated natural radionuclides (uranium, thorium, radium, etc.) that are in formation water coming to the surface with oil.

• Produced water is pumped together with oil and is separated from it flows through channels in the artificial lake.

• As a result of deposition and accumulation of isotopes 235U, 238U, 226Ra, 228Ra и 224Ra and 224Ra and their degradation products are detected in large quantities in water, sediment and soil in oil production.

Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

Relevance of research

Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

• This leads to increased levels of gamma radiation in the areas of accumulation, so cleaning the contaminated areas of the radioactive isotope is an urgent task.

• Analysis of the formation water and sediment showed that the bulk of them from the radionuclides uranium and radium.

• In nature, in contrast to the compounds of thorium, radium and uranium compounds are much more soluble in water.

• Particularly dangerous water soluble uranium, mainly because of its chemical toxicity and less radiotoxicity

• Therefore, the study of clean water basins soils from uranium and fission products of great interest.

Relevance of research

Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

0.01

0.1

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1000000

0 1

0.01

0.1

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0 1

Activity found in groundwater

Have been identified the activity of natural radioactive isotopes in layer waters the real environmental situation

238U, 235U, 234U, 40K 226Ra, 228Ra və 224Ra kimi

radioaktiv elementlər

CU~μq/lCRa~pq/l

U-235 U-238 0.1 2.17 Bq/l

Ra-226 Ra-228 10.5 12.5 Bq/l

Synthesis of Sorbent

Fig. Modification of cellulose medium CCl4, with PCl3 and molecular oxygen. - With features. gr. ~ [PO(OH)2]

Synthesis of Sorbent

+CHCl3

Fig. Modification of cellulose medium CCl4, with PCl3 and molecular oxygen. - With features. gr. ~ [PO(OH)OR2]

1 - IR spectrum of cellulose

  2 - IR modified sorbent

IR spectrum of Sorbent

1

2

HPGe Gamma-spectrometer Canberra, US (HPGe- High Purity Germanium Detector)

HP Ge Spectrometer, CANBERRA

Alpha Spectrometr, CANBERRAHP Ge Spectrometer, CANBERRA

Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

Determining uranium in the solution by spectrometric methods

HPGe Detector

Nümunə

1. Tədqiqat işində 226Ra izotopunun həcmi aktivliyi HPGe Detektorlu Qamma Spektrometrində (Canberra),

2. Uran izotoplarının (234U, 235U və 238U) aktivliyi “Alpha Analyst” markalı Alfa Spektrometrində (Canberra),

3. Uran və radium izotoplarının birgə sorbsiyası zamanı məhlulda izotopların aktivlikləri isə TriCarb 3100 TR markalı Maye Sintilyasiya Sayğacında (Perkin Elmer) təyin edilmişdir.

Alpha Analyst” markalı Alfa Spektrometrində

Determination of uranyl ion concentration in solution according to activities of U 235 and Pa 234

m radionuclides

186186

186235

kevU

SA

10011001

1001234

keVPa

SA

235

235 235 235 235

2351

2

ln 2 U

U U U AUU

mA N N

T M

238

238 238 238 238

2381

2

ln 2 U

U U U AUU

mA N N

T M

238 238 238

238

235 235 235 235

1

2

1

2

U U U

U U U U

UA M T

m

m A M T

Dependence sorption uranyl ions from solution pH

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20.0

40.0

60.0

80.0

100.0

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

pH

Sor

bsiy

a də

rəcə

si, R

%

-10.0

10.0

30.0

50.0

70.0

90.0

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

pH

R %

Optimal pH

I- (UO2)2(OH)22+ II- (UO2)3(OH)5

+

pH 5

pH 7

Sorption of uranyl ion UO22+

Сорбции УранилаSorption of uranyl ion UO22+

The dependence of the static adsorption having a functional group ~[PO(OH)2] from the initial and equilibrium concentration of the ion uranyl

с функц. гр. ~[PO(OH)2]

0

100

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400

0 250 500 750 1000 1250 1500 1750 2000 2250

Concentration of uranyl-ion, mg/L

Ab

sorp

tion

cap

acity

of s

orbe

nt,

m

g/g

Cequ

Co- Initial concentration of a uranyl-ion

The sorption capacity of 350 mg / g

Langmuir isotherm

Се: концентрация урана оставшегося в растворе после сорбции мг/л

qe: количество урана сорбируемого сорбентом с единой массой мг/г

КL: постоянная сорбции сорбента (л/g)

аL: постоянная связанная с энергией сорбции (л/мг)

с функц. гр. ~[PO(OH)2]

y = 0.0027x + 0.1374

R2 = 0.9985

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1.0

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Ce

Ce

/q e

CeK

a

Kq

C

L

L

Le

e 1

Sorption Properties

Название сорбента

Постоянные изотермы

ФрейндлихаПостоянные изотермы

Ленгмюра

n KF R2

KL

l/q

aL

l/mq RL

Qmax

mq/q

Модификат целлюлозы с функциональной группой ~[PO(OH)2] 3.54 60.7 0.993 7.3 0.01965 0.0458 350Модификат целлюлозы с функциональной группой~[PO(OH)OR2] 1.55 17.4 0.995 6.0 0.00539 0.0669 960

1/n : гетерогенный фактор сорбента

qe: количество урана сорбируемого сорбентом с единой массой мг/г

КL: постоянная сорбции сорбента (л/g)аL: постоянная связанная с энергией сорбции (л/мг)

Qmax: максимальная сорбционная емкость сорбента, мг/г

Xlorfosforlaşdırılmış sellüloza uranın desorbsiyasının tədqiqi

Uranil saxlayan klinoptilolitindən uranın HCl və HNO3 turşusu ilə desorbsiya qrafiki

Habelə, uranın “sorbsiya↔desorbsiya” tsikllərinin sayı da tədqiq edilmişdir.

0

25

50

75

100

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2

Turşunun qatılığı, M

Des

orbs

iya

dərə

cəsi

, % HCl

HNO3

• Separation and cleaning uranium from ground water

• Other sources of uranium

Актуальность Исследования Recommendations for the practical application

• Uranium-rich rocks

•  Uranium-rich ground water

Institute of Radiation Problems of ANAS, Radiochemistry Laboratory

Separation and cleaning uranium from Uranium-rich rocks

Süxur

Na2CO3 məhlulu

Süxur

H2SO4 məhlulu

[(UO2)2CO3 ]-2 məhlulu [(UO2)2SO4 ]-2 məhlulu

So

rbe

nt

De

so

rbs

iya

[UO2]+2 məhlulu

UO3 U3O8 UO2

AZƏRBAYCAN RESPUBLİKASININ PREZİDENTİ YANINDA

ELMİN İNKİŞAFI FONDU

• Layihənin adı: №04/019

Təbii radioaktiv radium izotoplarını ayırmaq üçün yeni effektiv sorbentlərin alınması və onların sorbsiya qanunauyğunluqlarının tədqiqi

Separation and cleaning uranium from ground water

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1- İlkin lay suyu2- Mexaniki filtr3- Neft faza4- Neft tələsi5- Nasos6- Sorbsiya kalonu (Kationit)

7- Sorbentin əlavə olunan kran8- İşlənmiş Sorbentin çıxarıldığı kran 9- Sorbsiya kalonu (Anionit)10- Təmizlənmiş lay suyu

Thank you for Attention !