Organo-modified sericite in the remediation of an aquatic environment contaminated with As(III) or As(V)

Lee, Seung; Tiwari, Diwakar
January 2014
Environmental Science & Pollution Research;Jan2014, Vol. 21 Issue 1, p407
Academic Journal
The aim of this investigation was to obtain the hybrid material precursor to the naturally and abundantly available sericite, a mica-based clay; the materials were further employed in the remediation of arsenic from aqueous solutions. The study was intended to provide a cost-effective and environmentally benign treatment technology. The hybrid organo-modified sericite was obtained using hexadecyltrimethylammonium bromide (HDTMA) and alkyldimethylbenzylammonium chloride (AMBA) organic surfactants by introducing regulated doses of HDTMA or AMBA. The materials were characterized using infrared and X-ray diffraction analytical data, whereas the surface morphology was discussed by taking its SEM images. These materials were employed to assess the pre-concentration and speciation of As(III) and As(V) from aqueous solutions. The batch reactor data showed that increasing the sorptive concentration (from 1.0 to 15.0 mg/L) and pH (i.e., pH 2.0 to 10.0) caused the percent uptake of As(III) and As(V) to decrease significantly. The kinetic data showed that a sharp initial uptake of arsenic reached its equilibrium state within about 50 min of contact time, and the sorption kinetics followed a pseudo-second-order rate law both for As(III) and As(V) sorption. A 1,000 times increase in the background electrolyte concentration, i.e., NaNO, caused a significant decrease in As(III) removal, whereas As(V) was almost unaffected, which inferred that As(III) was adsorbed, mainly by the van der Waals or even by the electrostatic attraction, whereas As(V) was adsorbed chemically and formed 'inner-sphere' complexes at the solid/solution interface. The equilibrium state modeling studies indicated that the sorption data fitted well the Freundlich and Langmuir adsorption isotherms. Henceforth, the removal capacity was calculated under these equilibrium conditions. It was noted that organo-modified sericite possessed a significantly higher removal capacity compared to its virgin sericite. Between these two organo-modified sericite, the HDTMA-modified sericite possessed a higher removal capacity compared to the AMBA-modified sericite.


Related Articles

  • Distribution of arsenic between the particulate and aqueous phases in surface water from three freshwater lakes in China. Yang, Fen; Geng, Di; Wei, Chaoyang; Ji, Hongbing; Xu, Hai // Environmental Science & Pollution Research;Apr2016, Vol. 23 Issue 8, p7452 

    Total arsenic (As) in suspended particulate matter (SPM) of lacustrine ecosystems has been extensively documented, but knowledge on the distribution of As between the particle and aqueous phases in freshwater lakes remains largely unknown. The present study employed a rapid method to determine...

  • Synthesis and Properties of N-Alkyl- N, N-Dimethyl- N-( o-Hydroxymethyl)Benzylammonium Chlorides. Guo, Xiangfeng; Zhang, Yingying; Jia, Lihua; Liu, Yanyan; Zhu, Zhanbo; Zhang, Yu; Yang, Rui // Journal of Surfactants & Detergents;Sep2015, Vol. 18 Issue 5, p845 

    A series of N-alkyl- N, N-dimethyl- N-( o-hydroxymethyl)benzylammonium chlorides surfactants (DHBA- m) were synthesized using o-chloromethylbenzyl alcohol and N-alkyl- N, N-dimethyl tertiary amine as raw materials. The structure of the products was confirmed by FT-IR, H NMR, C NMR and MS. DHBA-...

  • The nonionic surfactant pollution profile of Israel's Mediterranean Sea coastal water. Zoller, U.; Hushan, M. // Water Science & Technology;2000, Vol. 42 Issue 1/2, p429 

    Studies the nonionic surfactant pollution profile of the coastal water in the Mediterranean Sea. Core components of detergent formulations; Pollution profile of sewage and wastewaters; Potential estrogenic health risk of the anthropogenic phenol-based nonionic ethoxylates.

  • The Adsorption of SDS on Ferro-Precipitates. Marsalek, R. // World Academy of Science, Engineering & Technology;2011, Issue 58, p534 

    The main aim of the paper is to evaluate ferroprecipitates as immobilization agents for removing selected surfactants from aqueous solutions. Two ferro-precipitates based on iron oxides were used. Adsorbents were varied both in elementary composition and mineral composition. Sodium dodecyl...

  • Removal of Phosphate from Aqueous Solutions Using a New Modified Bentonite-Derived Hydrogel. Rahni, Soghra; Mirghaffari, Nourollah; Rezaei, Behzad; Ghaziaskar, Hassan // Water, Air & Soil Pollution;Apr2014, Vol. 225 Issue 4, p1 

    A bentonite-based hydrogel was chemically modified to prepare a new effective adsorbent for the removal of phosphate from aqueous solutions using batch equilibrium experiments at the laboratory scale. The efficiency of the phosphate adsorption by the modified adsorbents followed the order:...

  • Mechanism for the formation of low aspect ratio of La(OH) nanorods in aqueous solution: thermal and frequency dependent behaviour. Kohli, P.; Kumar, Manish; Raina, K.; Singla, M. // Journal of Materials Science: Materials in Electronics;Dec2012, Vol. 23 Issue 12, p2257 

    La(OH) nanorods of length varying between 30 and 50 nm with aspect ratio of 2-5 were synthesized in aqueous solution using hydrazine hydrate in presence of mixture of cationic N-cetyl- N, N, N,trimethylammonium bromide (CTAB) and tetra- n-butylammonium bromide (TBAB) surfactants. The resultant...

  • Aggregation Behavior of Surface Active Dialkylimidazolium Ionic Liquids [CCim]Br ( n = 1-4) in Aqueous Solutions. Liu, Xuefeng; Hu, Jie; Huang, Yijun; Fang, Yun // Journal of Surfactants & Detergents;Jul2013, Vol. 16 Issue 4, p539 

    Four diakylimidazolium ionic liquids, namely 1-alkyl-3-dodecylimidazolium bromides ([CCim]Br) with the same dodecyl long-chain tail (C) and the short alkyl side chain (C, n = 1-4), were synthesized, and their molecule structures were confirmed by ESI-MS, H-NMR and elemental analysis. The...

  • Protocol for Studying Aqueous Foams Stabilized by Surfactant Mixtures. Boos, Julia; Drenckhan, Wiebke; Stubenrauch, Cosima // Journal of Surfactants & Detergents;Jan2013, Vol. 16 Issue 1, p1 

    Even though foams have been the subject of intensive investigations over the last decades, many important questions related to their properties remain open. This concerns in particular foams which are stabilized by mixtures of surfactants. The present study deals with the fundamental question:...

  • A gas phase method for the generation of aqueous submicron suspensions of poorly water soluble organic substances. Waldraff, A.; Schaber, K. // Chemical Engineering Research & Design: Transactions of the Inst;Oct2015, Vol. 102, p244 

    This work presents a novel process for the production of vapor-borne submicron organic particles and their transfer into an aqueous environment. A mixture of water and the organic substance is totally evaporated in a micro-structured evaporator. In a second step, the hot vapor mixture is rapidly...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics