Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.watres.2013.04.033
Title: Removal of microcystin-LR and microcystin-RR by graphene oxide: Adsorption and kinetic experiments
Authors: Pavagadhi, S.
Tang, A.L.L.
Sathishkumar, M. 
Loh, K.P. 
Balasubramanian, R. 
Keywords: Adsorption
Algal bloom
Cyanotoxin
Graphene oxide
MCLR
MCRR
Microcystin
Issue Date: 1-Sep-2013
Citation: Pavagadhi, S., Tang, A.L.L., Sathishkumar, M., Loh, K.P., Balasubramanian, R. (2013-09-01). Removal of microcystin-LR and microcystin-RR by graphene oxide: Adsorption and kinetic experiments. Water Research 47 (13) : 4621-4629. ScholarBank@NUS Repository. https://doi.org/10.1016/j.watres.2013.04.033
Abstract: Graphene oxide (GO) was employed in the present study for removal of two commonly occurring algal toxins, microcystin-LR (MC-LR) and microcystin-RR (MC-RR), from water. The adsorption performance of GO was compared to that of commercially available activated carbon. Further, adsorption experiments were conducted in the presence of other environmental pollutants to understand the matrix effects of contaminated water on the selective adsorption of MC-LR and MC-RR onto GO. The environmental pollutants addressed in this study included different anions (nitrate (NO3-), nitrite (NO2-), sulphate (SO42-), chloride (Cl-), phosphate (PO43-) and fluoride (F-)) and cations (sodium (Na+), potassium (K+), magnesium (Mg2+) and calcium (Ca2+)). GO showed very a high adsorption capacity of 1700μg/g for removal of MC-LR and 1878μg/g for MC-RR while the maximum adsorption capacity obtained with the commercial activated carbon was 1481.7μg/g and 1034.1μg/g for MC-LR and MC-RR, respectively. The sorption kinetic experiments revealed that more than 90% removal of both MC-LR/RR was achieved within 5min for all the doses studied (500, 700 and 900μg/L). GO could be reused as an adsorbent following ten cycles of adsorption/desorption with no significant loss in its adsorption capacity. © 2013 Elsevier Ltd.
Source Title: Water Research
URI: http://scholarbank.nus.edu.sg/handle/10635/91180
ISSN: 00431354
DOI: 10.1016/j.watres.2013.04.033
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