Removal of lead from aqueous solutions by adsorption with surface precipitation

A Thermodynamic and Kinetic Evaluation of the Adsorption of Pb(II) Ions Using Peanut (Arachis Hypogaea) Shell-Based Biochar from Aqueous Media

“…Similar results for the adsorption of Pb(II) ions onto different adsorbents have been reported in the literature, e.g., active carbon from palm oil mill effluent [24], cucumber peel [25], active carbon from cows' bones [3], active carbon from coconut shells [18], porous starch [13], agricultural waste-based ash and Fe nanoparticle-loaded ash [4], and polymer-modified carboxymethyl cellulose from wheat straw [17].…”

“…Activated carbon from walnut wood 58.82 [44] Solanum melongena leaf powder 71.42 [14] Brassica Compestris Stem (BCS) 78.50 [39] Sulphuric acid-treated palm tree leaves 88.61 [43] Activated carbons from dinde stones 92.90 [21] Activated carbon from palm oil mill effluent 94.34 [24] Citric acid modified rubber leaf powder 97.19 [22] Apple juice residue 108.0 [45] Monosodium glutamate modified rubber leaf powder 109.9 [22] Activated carbons from guava seeds 114.8 [21] Cucumber peel 133.6 [25] Spirodelapolyrhiza (L.) Schleiden biomass 137.0 [5] Eucalyptus camaldulensis -HNO 3 modified 138.8 [41] Tomato waste 152.0 [45] Chemically modified agricultural waste 166.7 [16] The dried aquatic plant, LemnaperpusillaTorr. 196.0 [46] Ash from rosacanina-l leaves 588.0 [4] Polymer-modified wheat straw carboxymethyl cellulose 822.1 [17] Nanoparticles loaded ash (nFe-A) using Rosa Canina-L leaves 833.0 [4] were in agreement with other studies, which also have shown that the Langmuir model provides a good fit for the adsorption of Pb(II) [3,4,13,17,18,25,39,42,43]. Using the equation for the Langmuir isotherm model, the maximum monolayer adsorption capacities (q max ) for 293, 303, and 313 K were calculated as 56.5, 53.2 and 50.8 mg/g, respectively.…”

“…Parameters of thethermodynamic model for the adsorption of Pb(II) by biochar. Groundnut hull 31.54 [20] Peanut shell activated carbon 35.50 [28] Peanut shell 38.91 [27] Phosphoric acid dehydrated carbon (Moistened carbon) 41.50 [42] Commercial activated carbon 47.20 [18] Active carbon from Cow bone 47.62 [3] Eucalyptus camaldulensis 52.63 [41] Activated carbons from tropical almond shells 53.10 [21] Biochar from peanut shell…”

“…Although the adsorption process is more efficient and less expensive than other conventional treatment methods, the cost of adsorption processes depend largely on the properties of the adsorbent, such as the ability to regenerate/reuse the adsorbent and its adsorption capacity. To decrease the amount of by-products and to improve the quality of the treated water, several studies have been carried out on the adsorption of heavy metal ions onto various adsorbent materials [3][4][5][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. In these studies, it was presented that the surface properties of adsorbent (the mean diameter of the pores, the distribution of the pores, polarity) directly affect the adsorption yield and adsorbent capacity [10].…”

A systematic investigation on synergistic electroplating and capacitive removal of Pb2+ from artificial industrial waste water

“…9D and E). [51][52][53][54] However, the Pb 4f spectrum also shows a second, much weak, pair of peaks centered at 136.3 eV and 141.2 eV, which can be attributed to metallic lead from the reduction of Pb 2+ during the charging process and not re-oxidized during the discharge process. 55,56 Therefore, based on characterization measurements, hydrocerussite is formed on the cathode during charging and this cannot be redissolved completely during the discharging process.…”