Systematic studies on adsorption of lead on sea nodule residues

Kinetics and thermodynamics of lead (II) adsorption on lateritic nickel ores of Indian origin

“…The increase in adsorption could be due to changes in pore size or an increase in kinetic energy of the adsorbents. Such observations for adsorption of lead on iron oxide containing surfaces have been reported earlier [21,29,30]. The increase in % Pb(II) adsorption with increase in temperature suggests endothermic nature of adsorption which is attributable unequivocally to chemisorption [31].…”

“…Therefore, the search for novel materials with high efficiency to remove heavy metals from water and industrial effluents is of environmental and industrial interest. Waste products such as waste from bauxite refining (red mud), fly ash [19], blast furnace slag [20], manganese nodule leach residue [21] have been studied as adsorbents for the removal of Pb(II) ions. However, no work has been reported on the use of low and off grade ores for adsorption purposes.…”

Study on the adsorption of cadmium(II) from aqueous solution by D152 resin

“…Values b > 1 represents favorable adsorption conditions. In most cases, the exponent between 1 < b < 10 shows beneficial adsorption [22].…”

A zinc oxide-coated nanoporous carbon adsorbent for lead removal from water: Optimization, equilibrium modeling, and kinetics studies

“…In this context, the recovery of lead from water and wastewater has become a major topic of research in water treatment. Out of the wastewater treatment methods involving lead and other heavy metal ions, precipitation, coagulation-sedimentation, adsorption, reverse osmosis, and ion exchange, adsorption is considered quite attractive because of its ease of handling, its economy, and its effectiveness in treatment of a great variety of dissolved material (Agrawal et al 2005;Vukojevic Medvidovic et al 2006). Various adsorbents for the removal of heavy metal such as activated carbon (Seco et al 1997), sawdust of spruce (Urik et al 2009), carbon nanotube (Li et al 2005) and Leca (Malakootian et al 2009) have been explored.…”

“…Various adsorbents for the removal of heavy metal such as activated carbon (Seco et al 1997), sawdust of spruce (Urik et al 2009), carbon nanotube (Li et al 2005) and Leca (Malakootian et al 2009) have been explored. Current US EPA drinking water standard for lead is 0.05 mg/L (Agrawal et al 2005). Therefore, there is a considerable need to treat industrial effluents containing toxic heavy metals prior to discharge to protect public health and the necessity to exploit new high efficient adsorbents is great.…”