ORIGINAL aswell as fast kinetics towards As(V) in their

ORIGINAL ARTICLEFast and selective adsorption of As(V) on preparedmodified cellulose containing Cu(II) moietiesAhmed M. Yousif a,*, Osama F. Zaid a, I.A. Ibrahim ba Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egyptb Central Metallurgical Research & Development Institute (CMRDI), Helwan 11421, EgyptReceived 23 September 2014; accepted 6 February 2015Available online 19 February 2015KEYWORDSCellulose;Adsorption;Arsenic;Water treatmentAbstract Arsenic is one of the major pollutants and a worldwide concern because of its toxicityand chronic effects on human health. The synthesis of copper containing modified cellulose(Cell-N-Cu) adsorbent was achieved. The adsorbent was used to purify different waters fromAs(V) at different experimental conditions using batch method. Kinetic and thermodynamic propertiesas well as the mechanism of interaction between As(V) and adsorbent active sites were discussed.The adsorption behavior of the obtained samples showed high adsorption capacity aswell as fast kinetics towards As(V) in their solutions. The maximum adsorption capacities ofAs(V) on Cell-N-Cu adsorbent were found to be 1.32 mmol/g. Regeneration and durability ofthe loaded adsorbent towards the successive reuse were also investigated. Fast and selective separationof As(V) from a real wastewater sample indicated that the investigated resin is potentiallyattractive for arsenic removal from different waste streams.ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This isan open access article under theCCBY-NC-NDlicense (http://creativecommons.org/licenses/by-nc-nd/4.0/).1. IntroductionArsenic is toxic and its presence in drinking water causes toxicand carcinogenic effects on human beings. It is reported thatlong-term drinking of arsenic contaminated water causes gastrointestinal,skin, liver, and nerve tissue injuries (Saha et al.,1999; ATSDR, 2002).United States Environmental Protection Agency (USEPA)in 2001 reduced the limit of arsenic in drinking water to10 mg/L from an earlier value of 50 mg/L (Zaspalis et al.,2007; Kundu and Gupta, 2007; Pagana et al., 2008). Duringthe last 20 years, naturally occurring arsenic was found to bewidespread in natural water in the USA, Argentina, Taiwan,China, Hungary, Vietnam, Chile, Bangladesh and India. Itwas estimated that some 35–77 million people were at extremerisk of groundwater arsenic poisoning in Bangladesh(Chakravarty et al., 2002; Souter et al., 2003; Singh et al.,2004; Kundu and Gupta, 2005).Arsenic exists in natural waters in both inorganic as well asorganic forms. The inorganic form of arsenic is more toxicthan its organic form. Inorganic arsenic exists in naturalwaters in two oxidation states, As(III) and As(V). As(III) isdominant in more reduced conditions whereas As(V) is* Corresponding author. Tel.: +20 10 4548447; fax: +20 482222753.E-mail address: [email protected] (A.M. Yousif).Peer review under responsibility of King Saud University.