caa a22 4500 463170504 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10450-007-9073-x doi (NATIONALLICENCE)springer-10.1007/s10450-007-9073-x Optimization of layered double hydroxide stability and adsorption capacity for anionic surfactants [Elektronische Daten] [Natasja Schouten, Louis van der Ham, Gert-Jan Euverink, André de Haan] Low cost adsorption technology offers high potential to clean up laundry rinsing water. From an earlier selection of adsorbents (Schouten etal. 2007), layered double hydroxide (LDH) proved to be an interesting material for the removal of anionic surfactant, linear alkyl benzene sulfonate (LAS) which is the main contaminant in rinsing water. The main research question was to identify the effect of process parameters of the LDH synthesis on the stability of the LDH structure and the adsorption capacity of LAS. LDH was synthesized with the co-precipitation method of Reichle (1986); a solution of M2+(NO3)2 and M3+(NO3)3 and a second solution of NaOH and Na2CO3 were pumped in a beaker and mixed. The precipitate that was formed was allowed to age and was subsequently washed, dried and calcined. The process parameters that were investigated are the concentration of the initial solutions, M2+/M3+ ratio and type of cations. The crystallinity can be improved by decreasing the concentration of the initial solutions; this also decreases the leaching of M3+ from the brucite-like structure into the water. The highest adsorption capacity is obtained for Mg2+/Al3+ with a ratio1 and2 because of the higher charge density compared to ratio3. Storing the LDH samples in water resulted in a reduction of adsorption capacity and a decrease in surface area and pore volume. Therefore, LDH is not applicable in a small device for long term use in aqueous surroundings. The adsorption capacity can be maintained during storage in a dry N2 atmosphere. Springer Science+Business Media, LLC, 2007 Layered double hydroxide nationallicence Stability nationallicence Anionic surfactant nationallicence Adsorption capacity nationallicence Schouten Natasja Wetsus, Centre for sustainable water technology, Agora 1, P.O. Box 1113, 8900 CC, Leeuwarden, The Netherlands aut van der Ham Louis Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands aut Euverink Gert-Jan Wetsus, Centre for sustainable water technology, Agora 1, P.O. Box 1113, 8900 CC, Leeuwarden, The Netherlands aut de Haan André Faculty of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands aut Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 523-532 0929-5607 13:5-6<523 2007 13 10450 https://doi.org/10.1007/s10450-007-9073-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9073-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schouten Natasja Wetsus, Centre for sustainable water technology, Agora 1, P.O. Box 1113, 8900 CC, Leeuwarden, The Netherlands aut NATIONALLICENCE 700 1- van der Ham Louis Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands aut NATIONALLICENCE 700 1- Euverink Gert-Jan Wetsus, Centre for sustainable water technology, Agora 1, P.O. Box 1113, 8900 CC, Leeuwarden, The Netherlands aut NATIONALLICENCE 700 1- de Haan André Faculty of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 523-532 0929-5607 13:5-6<523 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer