Citrate-modified Mg–Al layered double hydroxides for efficient removal of lead from water
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Lead contamination is a threat for the environment and human health due to lead non-degradability and non-detoxification. Therefore, methods for efficient removal of lead from contaminated waters are needed. Here, a novel material has been synthesised by surface functionalization of magnesium–aluminum layered double hydroxide with citrate (citric-LDH) and applied to the efficient removal of lead from aqueous solutions. Effects of ionic strength and temperature on the adsorption have been evaluated. Results show that lead adsorption by citric-LDH can be used for lead pollution cleanup. Adsorption kinetics were simulated using a revised model. Simulation results show that citric-LDH adsorb lead ions through a more efficient and time-dependent pathway, leading to the rapid and efficient removal of lead ions.
KeywordsLead ion removal Citric modified Layered double hydroxides Adsorption kinetic equation Wastewater Layer insertion
This work was supported by the National Natural Science Foundation of China (91326202, 21577032), the Fundamental Research Funds for the Central Universities (2016ZZD06, JB2016166).
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