Adsorption 1 Adsorption process 1 Adsorption separation 1 Adsorption studies 1 Decision trees 1 Gradient boosting 1 Heavy metals 1 Ions 1 Layered-double hydroxides 1 Learning simulation Machine learning 1 Machine learning models 1 Machine-learning 1 Mercury (metal) 1 Nanocomposites 1 Predictive models 1 Regression analysis 1 Regression modelling 1 Separation 1