Adsorption of arsenate on titanium dioxide nanoparticles and bulk particles was studied at pH 4.5 and 7. Nanoparticle and bulk particle concentrations were 0.1–0.5 and 0.5–1.0 g/L, respectively. Initial Arsenic (As) (V) concentration ranged from 40 to 3,100 μg/L. Nanoparticles adsorbed more As (V) when normalized by mass, and bulk particles adsorbed more As (V) when normalized by surface area. At the same initial As (V) concentration, more As (V) was adsorbed at pH 4.5 than at pH 7. Adsorption data were best fitted with Freundlich isotherm model with r2 ranging from 0.97 to 0.99. Kinetic study showed that pseudo-second order model best describes the adsorption rate with r2 > 0.99. Simultaneous adsorption of single (As) and multiple metals (Zn, Cd, Pb) in San Antonio tap water was studied. Presence of multiple metals did not compete for As (V) adsorption sites in San Antonio tap water. The kinetic study showed an increased adsorption rate of As (V) in the presence of coexisting metals. Comparison of distribution coefficient (Kd) values with other works showed that TiO2 nanoparticles have 33–2,533 times greater Kd values than other nanoparticles and commercial activated carbon. Therefore, TiO2 nanoparticles could provide a better solution for the synergistic removal of arsenic and metals from water.
Get full access to this article
View all access options for this article.
References
1.
BacquartT., BradshawK., FrisbieS., MitchellE., SpringstonG., DefeliceJ., DustinH., and SarkarB. (2012). A survey of arsenic, manganese, boron, thorium, and other toxic metals in the groundwater of a West Bengal, India neighbourhood. Metallomics. 4, 653.
BrunauerS., EmmettP.H., and TellerE. (1938). Adsorption of gases in multimolecular layers. J. Am. Chem. Soc., 60, 309.
4.
ChanpiwatP., SthiannopkaoS., ChoK.H., KimK.W., SanV., SuvanthongB., and VongthavadyC. (2011). Contamination by arsenic and other trace elements of tube-well water along the Mekong River in Lao PDR. Environ. Pollut., 159, 567.
5.
CuiJ., DuJ., YuS., JingC., and ChanT. (2015). Groundwater arsenic removal using granular TiO2: Integrated laboratory and field study. Environ. Sci. Pollut. Res. Int., 22, 8224.
6.
DuttaP. K., RayA.K., SharmaV.K. and MilleroF.J. (2004). Adsorption of arsenate and arsenite on titanium dioxide suspensions. J. Colloid Interface Sci., 278, 270.
7.
EngatesK.E., and ShipleyH.J. (2011). Adsorption of Pb, Cd, Cu, Zn, and Ni to titanium dioxide nanoparticles: Effect of particle size, solid concentration, and exhaustion. Environ. Sci. Pollut. Res. Int., 18, 386.
8.
FergusonM.A., HoffmannM.R., and. HeringJ.G. (2005). TiO2-photocatalyzed As(III) oxidation in aqueous suspensions: Reaction kinetics and effects of adsorption. Environ. Sci. Technol., 39, 1880.
9.
FrisbieS.H., MitchellE.J., MasteraL.J., MaynardD.M., YusufA.Z., SiddiqM.Y., OrtegaR., DunnR.K., WestermanD.S., BacquartT., and SarkarB. (2009). Public health strategies for Western Bangladesh That address arsenic, manganese, uranium, and other toxic elements in drinking water. Environ. Health Perspect., 117, 410.
10.
FryxellG.E., LinY.H., WuH., and KemnerK.M. (2002). Environmental applications of self-assembled monolayers on mesoporous supports (SAMMS). Stud. Surface Sci. Catal., 141, 583.
11.
GiammarD.E., MausC.J., and XieL.Y. (2007). Effects of particle size and crystalline phase on lead adsorption to titanium dioxide nanoparticles. Environ. Eng. Sci., 24, 85.
12.
GuptaK.K., SinghN.L., PandeyA., ShuklaS.K., UpadayayS.N., MishraV., SrivastavaP., LallaN.P., and MishraP.K. (2013). Effect of anatase/rutile TiO2 phase composition on arsenic adsorption. J. Dispersion Sci. Technol., 34, 1043.
13.
HristovskiK., BaumgardnerA., and WesterhoffP. (2007). Selecting metal oxide nanomaterials for arsenic removal in fixed bed columns: From nanopowders to aggregated nanoparticle media. J. Hazard. Mater., 147, 265.
14.
HuJ., ChenG.H., and LoI.M.C. (2006). Selective removal of heavy metals from industrial wastewater using maghemite nanoparticle: Performance and mechanisms. J. Environ. Eng. Asce., 132, 709.
15.
HuJ.X., and ShipleyH.J. (2012). Evaluation of desorption of Pb (II), Cu (II) and Zn (II) from titanium dioxide nanoparticles. Sci. Total Environ., 431, 209.
16.
HuS., YanL., ChanT.S. and JingC.Y. (2015). Molecular Insights into Ternary Surface Complexation of Arsenite and Cadmium on TiO2. Environ. Sci. Technol., 49, 5973.
17.
JainC.K., and AliI. (2000). Arsenic: Occurrence, toxicity and speciation techniques. Water Res. 34, 4304.
18.
KanematsuM., YoungT.M., FukushiK., GreenP.G., and DarbyJ.L. (2012). Individual and combined effects of water quality and empty bed contact time on As(V) removal by a fixed-bed iron oxide adsorber: Implication for silicate precoating. Water Res. 46, 5061.
19.
LiY., CaiX., GuoJ., and NaP. (2014). UV-induced photoactive adsorption mechanism of arsenite by anatase TiO2 with high surface hydroxyl group density. Colloids Surfaces Physicochem. Eng. Aspects., 462, 202.
20.
LiangP., ShiT.Q., and LiJ. (2004). Nanometer-size titanium dioxide separation/preconcentration and FAAS determination of trace Zn and Cd in water sample. Int. J. Environ. Anal. Chem., 84, 315.
21.
MahajanR.K., WaliaT.P., LarkB.S., and Sumanjit. (2006). Analysis of physical and chemical parameters of bottled drinking water. Int. J. Environ. Health Res., 16, 89.
22.
MandalB.K., and SuzukiK.T. (2002). Arsenic round the world: A review. Talanta. 58, 201.
23.
MohanD., and PittmanC.U. (2007). Arsenic removal from water/wastewater using adsorbents—A critical review. J. Hazard. Mater., 142, 1.
24.
NicholasD.R., RamamoorthyS., PalaceV., SpringS., MooreJ.N., and RosenzweigR.F. (2003). Biogeochemical transformations of arsenic in circumneutral freshwater sediments. Biodegradation. 14, 123.
25.
ParaguayM.Z.L., CortesJ.A., Perez-RoblesJ.F., and Alarcon-HerreraM.T. (2014). Adsorption of Arsenite from Groundwater Using Titanium Dioxide. Clean Soil Air Water. 42, 713.
26.
PattanayakJ., MondalK., MathewS., and LalvaniS.B. (2000). A parametric evaluation of the removal of As(V) and As(III) by carbon-based adsorbents. Carbon. 38, 589.
27.
PenaM.E., KorfiatisG.P., PatelM., LippincottL., and MengX.G. (2005). Adsorption of As(V) and As(III) by nanocrystalline titanium dioxide. Water Res. 39, 2327.
28.
SavageN., and DialloM.S. (2005). Nanomaterials and water purification: Opportunities and challenges. J. Nanoparticle Res., 7, 331.
29.
ShipleyH.J., YeanS., KanA.T., and TomsonM.B. (2009). Adsorption of arsenic to magnetite nanoparticles: Effect of particle concentration, Ph, ionic strength, and temperature. Environ. Toxicol. Chem., 28, 509.
30.
StachowiczM., HiemstraT., and van RiemsdijkW.H. (2008). Multi-competitive interaction of As(III) and As(V) oxyanions with Ca2+, Mg2+, PO43-, and CO32- ions on goethite. J. Colloid Interface Sci., 320, 400.
31.
TupwongseV., ParkpianP., WatcharasitP., and SatayavivadJ. (2007). Determination of levels of Mn, As, and other metals in water, sediment, and biota from Phayao Lake, Northern Thailand, and assessment of dietary exposure. J. Environ. Sci. Health A Tox. Hazard. Subst. Environ. Eng., 42, 1029.
32.
USEPA (2001). 66 FR 6975-National Primary Drinking Water Regulations. Federal Register. 66, 6976.
33.
WaychunasG.A.,. KimC.S., and BanfieldJ.F. (2005). Nanoparticulate iron oxide minerals in soils and sediments: Unique properties and contaminant scavenging mechanisms. J. Nanoparticle Res., 7, 409.
34.
YantaseeW., WarnerC.L., SangvanichT., AddlemanR.S., CarterT.G., WiacekR.J., FryxellG.E., TimchalkC., and WarnerM.G. (2007). Removal of heavy metals from aqueous systems with thiol functionalized superparamagnetic nanoparticles. Environ. Sci. Technol., 41, 5114.
35.
YuL., PengX.J., NiF., LiJ., WangD.S., and LuanZ.K. (2013). Arsenite removal from aqueous solutions by gamma-Fe2O3-TiO2 magnetic nanoparticles through simultaneous photocatalytic oxidation and adsorption. J. Hazard. Mater., 246, 10.
36.
ZhuY.G., WilliamsP.N., and MehargA.A. (2008). Exposure to inorganic arsenic from rice: A global health issue? Environ. Pollut. 154, 169.
