High-efficient adsorption of phosphates from water by hierarchical CuAl/Biomass Carbon fiber layered double hydroxide

Publication date: Available online 9 July 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Fengping Hu, Min Wang, Xiaoming Peng, Fengxian Qiu, Tao Zhang, Hongling Dai, Zhanmeng Liu, Zan CaoAbstractPhosphorus-contaminated wastewater is one of the main reasons for eutrophication. In this work, a hierarchical CuAl/Biomass Carbon fiber layered double hydroxide was synthesized successfully and applied to phosphates adsorption in simulated wastewater. The morphologies and structures of composites were characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FTIR) and Raman spectrum (RS) analyses. The influences of pH, dosage of adsorbent, competitive anions, initial phosphates concentration and contact time on adsorption progress were studied. The adsorption of phosphates reached equilibrium quickly at about 50 min and the removal efficiency reached 99.6%. The results indicated that the major adsorption mechanism included anion-exchange, electrostatic attraction and ligand exchange were occurred during phosphates adsorption process. The results indicated that the phosphates removal kinetics is well fitted pseudo-second order model, and the adsorption isotherm is well described by Langmuir model. In addition, the regeneration potential and reuse of spent as-prepared adsorbents experiments showed the composites possess highly recyclable ability. It could be suggested t...

Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - July 11, 2018 Category: Chemistry Source Type: research