2018
DOI: 10.1080/01496395.2018.1523192
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Competitive adsorption of heavy metal ions (Pb2+, Cu2+, and Ni2+) onto date seed biochar: batch and fixed bed experiments

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Cited by 59 publications
(25 citation statements)
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“…Therefore, at a pH value > 9.5, TIGC is expected to exist in the deprotonated form with small amount of the zwitterionic form, while at pH < 2.8, TIGC would be in the protonated form with small amount of the zwitterionic form, and at a 2.8 < pH < 9.5, the three forms of TIGC exist together with the zwitterion form being dominant. On the other hand, BCDP (burnt at 500 °C) has been reported to have a point-of-zero-charge (pH PZC ) of ~ 6.35 [ 38 , 61 , 62 ]. Therefore, at high pH values (> 6.35), the adsorbent surface will be negatively charged.…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, at a pH value > 9.5, TIGC is expected to exist in the deprotonated form with small amount of the zwitterionic form, while at pH < 2.8, TIGC would be in the protonated form with small amount of the zwitterionic form, and at a 2.8 < pH < 9.5, the three forms of TIGC exist together with the zwitterion form being dominant. On the other hand, BCDP (burnt at 500 °C) has been reported to have a point-of-zero-charge (pH PZC ) of ~ 6.35 [ 38 , 61 , 62 ]. Therefore, at high pH values (> 6.35), the adsorbent surface will be negatively charged.…”
Section: Resultsmentioning
confidence: 99%
“…The concentration of Dy(III) in the mixed solution was measured by the ICP-OES at a wavelength of 353.17 nm. The adsorption capacities Q t (mg g − 1 ) were calculated by the following formula (Mahdi et al 2018) (1) Where C 0 and C t (mg L − 1 ) are initial concentration and the residual concentration of Dy(III) in mixed solution, respectively. V (L) is the volume of Dy(III) stock solution, and m (g) is the mass of aerogel.…”
Section: Adsorption Experimentsmentioning
confidence: 99%
“…The lower adsorption capacity of the Ni (II) ion is related to that, the higher hydration energy of this ion compared to the Pb (II) ion (2105.0 kJ / mol for Nickel and 1500.6 kJ / mol for Lead) [65 ], [66]. Furthermore, the lower adsorption capacity of the Ni (II) ion may also be due to its lower covalent binding index (5.63) compared to the Pb (II) ion (11.1), so that Lead has a greater tendency to form covalent bonds with adsorbent ligands [67]…”
Section: Thermodynamic Parametersmentioning
confidence: 99%