TY  - MGZN
AU  - Sole, M.
AU  - Gamisans, X.
AU  - Dorado, A.D.
AU  - Lao, C.
T2  - Water, air and soil pollution
Y1  - 2016
VL  - 227
IS  - 4, Article 128
SP  - 1
EP  - 9
DO  - 10.1007/s11270-016-2827-x
UR  - http://link.springer.com/article/10.1007%2Fs11270-016-2827-x
AB  - The removal of As(V) from aqueous solutions by leonardite loaded with ferric ions (Fe-leonardite) has been investigated. The influence of pH, contact time, and arsenate concentration on the adsorption process were evaluated. Batch kinetic studies showed that equilibrium time was reached at 24 h of contact time. Equilibrium data obtained with low initial arsenate concentrations (10-400 ppb) were fitted to both Langmuir and Freundlich models, and the maximum adsorption capacity was estimated to be 322 µg g-1. Arsenic sorption was evaluated in continuous mode to reproduce industrial applications and to determine the conditions where the process was controlled by either mass transfer or reaction rate. A maximum sorption capacity of 905 µg g-1 was obtained in continuous experiments. These results indicate that Fe-leonardite is a great potential material for removing arsenate at low initial concentrations from contaminated water. © Springer International Publishing Switzerland 2016.
TI  - Exploring arsenic adsorption at low concentration onto modified leonardite
ER  -