Metal Ion Adsorption to Complexes of Humic Acid and Metal Oxides:  Deviations from the Additivity Rule

Multiple metal ions adsorption of Cu(II), Zn(II), Mn(II) and Fe(II) on humic acid with a batch method has been carried out at pH interaction of 3, 5, and 6. Concentration of metal ions in solution before and after interaction was analyzed with Atomic Absorption Spectrophotometer (AAS). Result showed that adsorption multiple metal ions of Cu(II), Zn(II), Mn(II), and Fe(II) on humic acid is optimum at pH 5. Adsorption energies of the multiple metal ions Cu(II), Zn(II), Mn(II), and Fe(II) on humic acid at pH 3, 5, and 6 are around 35.0 - 37.6 kJ/mole. In general, capacity of competition adsorption of the multiple metal ions has an order as follows; Cu(II) < Fe(II) < Zn(II) < Mn(II). Keywords: Humic acid, adsorption, multiple metal

Download Full-text

Benzo[a]pyrene and heavy metal ion adsorption on nanoplastics regulated by humic acid: cooperation/competition mechanisms revealed by molecular dynamics simulations

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2021.127431 ◽

2021 ◽

pp. 127431

Author(s):

Hao Feng ◽

Yingjie Liu ◽

Yan Xu ◽

Shixin Li ◽

Xia Liu ◽

...

Keyword(s):

Molecular Dynamics ◽

Heavy Metal ◽

Humic Acid ◽

Molecular Dynamics Simulations ◽

Metal Ion ◽

Heavy Metal Ion ◽

Ion Adsorption ◽

Metal Ion Adsorption ◽

Dynamics Simulations

Download Full-text

Preparation, characterization and application of CS@PDA@Fe3O4 nanocomposite as a new magnetic nano-adsorber for the removal of metals and dyes in wastewater

RSC Advances ◽

10.1039/d1ra03779j ◽

2021 ◽

Vol 11 (38) ◽

pp. 23679-23685

Author(s):

Xingjing Zhang ◽

Baohe Li ◽

Xiaoqian Han ◽

Nong Wang

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Heavy Metal Ion ◽

Ion Adsorption ◽

Metal Ion Adsorption

Synthesis of CS@PDA@Fe3O4 nanocomposite and heavy metal ion adsorption.

Download Full-text

Centrifugal Spinning of Lignin Amine/Cellulose Acetate Nanofiber for Heavy Metal Ion Adsorption

Fibers and Polymers ◽

10.1007/s12221-021-3210-0 ◽

2021 ◽

Author(s):

Lei Xia ◽

Hui Feng ◽

Quping Zhang ◽

Xiaohui Luo ◽

Pengfei Fei ◽

...

Keyword(s):

Heavy Metal ◽

Cellulose Acetate ◽

Metal Ion ◽

Heavy Metal Ion ◽

Ion Adsorption ◽

Metal Ion Adsorption ◽

Centrifugal Spinning ◽

Lignin Amine

Download Full-text

Impact of the degree of functionalization of graphene oxide on the electrochemical charge storage property and metal ion adsorption

RSC Advances ◽

10.1039/c4ra08862j ◽

2014 ◽

Vol 4 (107) ◽

pp. 62737-62745 ◽

Cited By ~ 27

Author(s):

Mahesh M. Kadam ◽

Omkar R. Lokare ◽

Kota V. M. K. Kireeti ◽

Vilas G. Gaikar ◽

Neetu Jha

Keyword(s):

Graphene Oxide ◽

Metal Ion ◽

Charge Storage ◽

Ion Adsorption ◽

Oxidizing Agent ◽

Metal Ion Adsorption ◽

Storage Property

The increase in oxygen functionalities on GO with increasing use of oxidizing agent results in (i) amplification of redox pseudocapacitive current and (ii) improves metal ion adsorption.

Download Full-text

Cadmium Ion Biosorption by the Thermophilic Bacteria Geobacillus stearothermophilus and G. thermocatenulatus

Applied and Environmental Microbiology ◽

10.1128/aem.00295-06 ◽

2006 ◽

Vol 72 (6) ◽

pp. 4020-4027 ◽

Cited By ~ 58

Author(s):

Adrian Hetzer ◽

Christopher J. Daughney ◽

Hugh W. Morgan

Keyword(s):

Metal Ion ◽

Functional Group ◽

Thermophilic Bacteria ◽

Toxicity Tests ◽

Ion Adsorption ◽

Geobacillus Stearothermophilus ◽

Cadmium Ion ◽

Thermophilic Microorganisms ◽

Gram Positive Bacteria ◽

Metal Ion Adsorption

ABSTRACT This study reports surface complexation models (SCMs) for quantifying metal ion adsorption by thermophilic microorganisms. In initial cadmium ion toxicity tests, members of the genus Geobacillus displayed the highest tolerance to CdCl2 (as high as 400 to 3,200 μM). The thermophilic, gram-positive bacteria Geobacillus stearothermophilus and G. thermocatenulatus were selected for further electrophoretic mobility, potentiometric titration, and Cd2+ adsorption experiments to characterize Cd2+ complexation by functional groups within and on the cell wall. Distinct one-site SCMs described the extent of cadmium ion adsorption by both studied Geobacillus sp. strains over a range of pH values and metal/bacteria concentration ratios. The results indicate that a functional group with a deprotonation constant pK value of approximately 3.8 accounts for 66% and 80% of all titratable sites for G. thermocatenulatus and G. stearothermophilus, respectively, and is dominant in Cd2+ adsorption reactions. The results suggest a different type of functional group may be involved in cadmium biosorption for both thermophilic strains investigated here, compared to previous reports for mesophilic bacteria.

Download Full-text