Transcript Gp_Reyad
REMOVAL OF ARSENIC FROM
AQUEOUS SOLUTION BY
ADSORPTION WITH ACTIVATED
CARBON
GROUP MEMBERS:
Ajit Singh Patel
Kuldeep Singh
Reyad Ranjon Roy
BACKGROUND AND OBJECTIVE:
BACKGROUND:
Sources of arsenic
Why is its removal necessary?
Methods for removal
OBJECTIVE:
Removal of arsenic upto permissible limit.
Comparison of adsorption parameters
Study the effect of modification, pH, temperature and presence of co-ions.
Selection of efficient and economic method
METHODS:
The following types of activated carbon were used for :
Adsorption capacity and Isotherm study
Kinetic study
pH change, temperature variation, presence of co-ions
Coal derived activated carbon modified with NZVI
Bituminous based, coconut coal and wood based activated carbon
apricot stone based activated carbon hybrid adsorbents
Activated carbons with iron hydro(oxide) nanoparticles
Biomass waste (bean pods) derived activated carbon
china calgon activated carbon
Darco and norrit activated carbon
Charcoal activated carbon
Activated carbon from fibre cloths
Activated carbon from pine wood sawdust
FINDINGS:
modification of AC by iron gives higher removal and reduction in regeneration
frequency.
rapid adsorption and better removal efficiency by modification with Fe+3 than
Fe+2.
amount of iron present in water affects adsorption capacity as when amount
of Fe increases from 0 to 4.22% only then removal efficiency increases.
Oxidised AC gives very rapid and efficient removal upto less than 10
microgram/L As content.
the activated carbon, with higher value of ash content , was more effective
in removing As(V) .
Biomass(bean pods) derived AC provides very cheap removal of As(III). This
type of AC have higher efficiency than other for same specific Area .
Generally maximum adsorption capacity is found between pH 6-8 ,but
bituminous waste and coconut husk based AC gives maximum adsorption
capacity at pH 11.
coal derived AC which is modified with NZVI particles is superior for removal
of As(III) in available pH conditions for natural water.
Charcoal based AC is found to be best for the removal of As(V) in pH range
from 6 to 8.
SO42- and Cl- have more affinity to AC than arsenic.
Presence of common divalent cation like Mg+2,Ca+2 and Fe+2 increases the
removal % of arsenate whereas presence of Ag+ and Cu+ increases the removal
% of As(III) but decreases the removal % of As(V) considerably .
Adsorption by Fe+2 modified AC is endothermic while Adsorption by Fe+3
modified AC is found exothermic in case of apricot based AC. Some AC shows
insignificant change in adsorption capacity with temperature variation.
Issues and directions for further
research
For economic new waste produced materials such as from nutshell, peat etc.
should be used for the production of AC.
New modification method should introduce because Modified activated carbon
has more adsorption capacity than virgin activated carbon.
REFERENCES:
B K Mandal, Kazuo T. Suzuki, Arsenic round the world: a review, Graduate School of Pharmaceutical Sciences, Chiba Uniersity,
Chiba 263 -8522, Japan.
US EPA. Minor clarification of National Primary Drinking Water Regulation for arsenic. Proposed rule. Fed Regist
2002;67(246):78203–9.
A.M. Raichur, V. Panvekar, Removal of As(V) by adsorption onto mixed rare earth oxides, Sep. Sci. Technol. 37 (5) (2002) 1095–
1108.
S. Goldberg, Competitive adsorption of arsenate and arsenite on oxides and clay minerals, Soil Sci. Soc. Am. J. 66 (2) (2002)
413–421
M.-J. Kim, Separation of inorganic arsenic species in groundwater using ion exchange methods, Bull Environ. Contam. Toxicol.
67 (1) (2001) 46–51.
R. Mamtaz, D.H. Bache, Reduction of arsenic in groundwater by coprecipitation with iron, J. Water Supply (2001) 313–324.
R.C. Cheng, H.C. Wang, M.D. Beuhler, Enhanced coagulation for arsenic removal, J. Am. Water Works Assoc. 86 (9) (1994) 79–
90.
Cornell RM, Schwertmann U. The iron oxide. 1st ed. New York: VCH Publishers; 1996.
L. Cumbal, A.K. Sengupta, Arsenic removal using polymer-supported hydrated iron(III) oxide nanoparticles: role of Donnan
membrane effect, Environ. Sci. Technol. 39 (2005) 6508–6515.
Mohan D, Pittman Jr CU. Arsenic removal from water/wastewater using adsorbents – a critical review. J HazardMater
2007;142:1–53.
A. Özge, E. Özdemir, E. Bilgin, U Beker, Removal of As(V) from aqueous solution by activated carbon-based hybrid adsorbents:
Impact of experimental conditions, Chemical Engineering Journal 223 (2013) 116–128.
G. Ghanizadeh, M.H. Ehrampoush, M.T. Ghaneian, Application of iron impregnated activated carbon for removal of arsenic from
water, Iran. J. Environ. Health Sci. Eng. 7 (2010) 145–156.
E. Deliyanni, T.J. Bandosz, K.A. Matis, Impregnation of activated carbon by iron oxyhydroxide and its effect on arsenate
removal, J. Chem. Technol. Biotechnol.88 (2013) 1058–1066
K.D. Hristovski, P.K. Westerhoff, T. Möller, P. Sylvester, Effect of synthesis conditions on nano-iron (hydr)oxide impregnated
granulated activated carbon, Chem. Eng. J. 146 (2009) 237–243
A.Ö.A. Tuna, E. Özdemir, E.B. Simsek, U. Beker, Removal of As(V) from aqueous solution by activated carbon-based hybrid
adsorbents: impact of experimental conditions, Chem. Eng. J. 223 (2013) 116–128.
Q. Chang, W. Lin, W.-C. Ying, Preparation of iron-impregnated granular activated carbon for arsenic removal from drinking
water, J. Hazard. Mater. 184 (2010) 515–522.
P. Lodeiro, S.M. Kwan, J.T. Perez, L.F. González, C. Gérente, Y. Andrès, G. McKay, Novel Fe loaded activated carbons with
tailored properties for As(V) removal: adsorption study correlated with carbon surface chemistry, Chem. Eng. J. 215–216 (2013)
105–112.
W. Chen, R. Parette, J. Zou, F.S. Cannon, B.A. Dempsey, Arsenic removal by ironmodified activated carbon, Water Res. 41
(2007) 1851–1858.
S Zhang , X Li, J. Paul Chen, Preparation and evaluation of a magnetite-doped activated carbon fiber for enhanced arsenic
removal, Carbon 48 (2010)60-67
Z. Gu, J. Fan, B. Deng, Preparation and evaluation of GAC-Based iron containing adsorbents for arsenic removal, Environ. Sci.
Technol. 39 (2005) 3833–3843.
H.Zhua, Y.Jia, X.Wua, H Wang, Removal of arsenic from water by supported nano zero-valent iron on activated carbon, Journal
of Hazardous Materials 172 (2009) 1591–1596.
Z Liua, F S Zhanga, R Sasaib, Arsenate removal from water using Fe3O4-loaded activated carbon prepared from waste biomass,
Chemical Engineering Journal 160 (2010) 57–62
J.A. Arcibar-Orozco, D.B. Josue, J. C. R.Hurtado, J. R. R.Mendez , Influence of iron content, surface area and charge
distribution in the arsenic removal by activated carbons, Chemical Engineering Journal 249 (2014) 201–209
A.Yürüm, Z.Ö. K.Atakli , M. Sezen , R. Semiat, Y.Yürüm, Fast deposition of porous iron oxide on activated carbon by microwave
heating and arsenic (V) removal from water, Chemical Engineering Journal 242 (2014) 321–332.
Q.L. Zhang, Y.C. Lin, X. Chen, N.Y.Gao, A method for preparing ferric activated carbon composites adsorbents to remove
arsenic from drinking water, Journal of Hazardous Materials 148 (2007) 671–678.
A.Ö.A.Tuna, E.Özdemir, E.Bilgin, U.Beker, Removal of As(V) from aqueous solution by activated carbon-based hybrid
adsorbents: Impact of experimental conditions, Chemical Engineering Journal 223 (2013) 116–128.
A.V.V.Rodriguez, J.R.R.Mendez, Arsenic removal by modified activated carbons with iron hydro(oxide)nanoparticles, Journal of
Environmental Management 114 (2013)225e231
T. Budinova, D. Savova , B.Tsyntsarski, C.O. Ania, B. Cabal , J.B. Parra, N. Petrov, Biomass waste-derived activated carbon for
the removal of arsenic and manganese ions from aqueous solutions, Applied Surface Science 255 (2009) 4650–465