Kinetics of Pb (II) adsorption on black carbon derived from wheat residue

Wang, Xue Song; Lu, Zhi Peng; Miao, Hua Hua; He, Wen; Shen, Hong Liang

doi:10.1016/j.cej.2010.11.089

Cited by 54 publications

(21 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A great variety of adsorbents have been developed and used for Pb removal, including activated carbon (Wang et al, 2010), nano-adsorbents (e.g., carbon nanotubes) and low-cost adsorbents (e.g., wood fibers, natural zeolite, clay and kaolinite) (Huang et al, 2009;Fu and Wang, 2011). Despite widespread use of these adsorbents in Pb removal, adsorption still has major limitations due to its high cost and low selectivity (Wang et al, 2011a). In addition, release of nano-adsorbents into air, water and soil likely cause potential toxicity to organisms (Wang et al, 2011b).…”

Section: Introductionmentioning

confidence: 99%

“…fractions and increasing aromatization(Keiluweit et al, 2010;Wang et al, 2013).Thirdly, the peak at 1600-1620 cm -1 assigned to C=O of carboxyl and ketones or C=C aromatic components, and seriously became weaker above 500 °C, because C=O was easy to rupture to form gas and liquid products(Lu et al, 2012;Wang et al, 2013).Finally, the bands at 1385 and 1315 cm -1 were attributed to stretching vibration of the phenolic -OH or C-O stretching of carboxylate anion(Wang et al, 2011a), which weakened with the increasing temperature and disappeared above 500 °C. These OFGs may be involved in coordination with Pb 2+ due to surface complexation with carboxyl (-COOH) and/or hydroxyl (-OH) functional groups.…”

mentioning

confidence: 96%

See 1 more Smart Citation

Investigating the mechanisms of biochar’s removal of lead from solution

Wang

Liu

Zheng

et al. 2015

Bioresource Technology

382

156

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 96%

Investigating the mechanisms of biochar’s removal of lead from solution

Wang

Liu

Zheng

et al. 2015

Bioresource Technology

382

156

View full text Add to dashboard Cite

“…To acquire the adsorption mechanism of lead(II) on these hybrid adsorbents, the experimental data were analyzed using six typical two-parameter kinetic equations (i.e. the Lagergren pseudo-first-order model and pseudosecond-order model [4,11,12], the Ritchie second-order model and modified second-order model [13,14], the Elovich model [14,15], and the intraparticle diffusion model [16]). …”

Section: Adsorption Capacity Of Lead(ii) Vs Adsorption Timementioning

confidence: 99%

Kinetic model investigation on lead(II) adsorption using silica-based hybrid membranes

Liu

Chen

2015

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TWith the rapid development of lead refineries and the wide application of leaded work in electrical industry, lead(II) pollution has deserved much attention. In this study, the kinetic models of lead(II) adsorption onto silica-based hybrid membranes as solid adsorbents were studied. To study the adsorption mechanism of heavy metal ions on these hybrid adsorbents, the experimental data were linearly fitted using six typical two-parameter kinetic equations (i.e. Lagergren pseudo-first-order and pseudo-second-order, Ritchie second-order and modified second-order, Elovich, as well as intraparticle diffusion models). It was found that the experimental results fitted well with Lagergren pseudo-second-order model, Elovich, and intraparticle diffusion models. These findings are very useful in the design and optimization of silica-based hybrid membranes for lead(II) removal from water by adsorption.

show abstract

“…The peak located at 1600 cm -1 was assigned to C=O of carboxyl and ketones or C=C aromatic components . The band at about 1450 cm -1 (aromatic C=C ring stretching) and the peak at 1400 cm -1 (corresponding to stretching vibration of the phenolic -OH or C-O stretching of carboxylate anion) (Silber et al 2010;Wang et al 2011) was lower in WBC than in BC. The broad band at 1300-900 cm -1 (with peak at 1104 cm -1 ) is assigned to Si-O-Si stretching vibration, and the two small bands at about 802 and 467 cm -1 indicate Si-O-Si vibrations (Silber et al 2010;Yang et al 2008).…”

Section: Acknowledgmentsmentioning

confidence: 99%

Contribution of Soluble Minerals in Biochar to Pb2+ Adsorption in Aqueous Solutions

Bian

et al. 2017

BioResources

View full text Add to dashboard Cite

Biochar is widely used as an adsorbent to remove heavy metals from aqueous solutions. To investigate the contribution of soluble minerals (mainly anions) to Pb 2+ removal in solution, wheat straw biochar was washed with deionized water to remove soluble minerals. Batch adsorption was conducted using washed biochar (WBC) and unwashed biochar (BC) to absorb Pb 2+ . After washing, the pH and ash content of biochar were reduced, while the specific surface area and total pore volume were increased. Adsorption kinetics of Pb 2+ onto BC and WBC were well fitted to the pseudo-second-order model (R 2 > 0.99). Pb sorption on BC and WBC were better fit with the Langmuir model (R 2 = 0.96 to 0.97) than the Freundlich model (R 2 = 0.71 to 0.87). The Langmuir maximum adsorption capacity of Pb on BC was 99.7 mg g -1 , which was 4.5-fold higher than that on WBC when the initial solution pH was 5.0. The concentration of SO4 2-, CO3 2-, SiO3 2-, and PO4 3-in the equilibrium solution was reduced by 69, 89, 97, and 41%, respectively, with the increase of initial Pb 2+ concentration. The difference of Pb 2+ adsorption capacity between BC and WBC proved that the soluble anions in biochar play an important role in Pb 2+ sorption onto biochar.

show abstract

Kinetics of Pb (II) adsorption on black carbon derived from wheat residue

Cited by 54 publications

References 22 publications

Investigating the mechanisms of biochar’s removal of lead from solution

Investigating the mechanisms of biochar’s removal of lead from solution

Kinetic model investigation on lead(II) adsorption using silica-based hybrid membranes

Contribution of Soluble Minerals in Biochar to Pb2+ Adsorption in Aqueous Solutions

Contact Info

Product

Resources

About