Competition and complexation of heavy metal ions and humic acid on zeolitic MCM-22 and activated carbon

AbstractThe generation of humic colloids of Am(III) has been investigated in Gorleben groundwaters containing different amounts of humic substances. Dissolved organic carbon (DOC) in these groundwaters consists mainly of humic acid and fulvic acid, which is present in a colloidal form through aggregation with trace heavy metal ions of groundwater constituents. Concentrations of these heavy metal ions are proportional to the DOC concentration. The generation of Am(III) pseudocolloids through geochemical interactions with humic colloids in different groundwaters is quantified by ultrafiltration as well as ultracentrifugation by the aid of radiometric concentration measurements. The speciation of dissolved Am(III) species in groundwaters is carried out by laser induced photoacoustic spectroscopy (LPAS).

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Preparation and Characterization of Nanoporous Activated Carbon Derived from Prawn Shell and Its Application for Removal of Heavy Metal Ions

Materials ◽

10.3390/ma12020241 ◽

2019 ◽

Vol 12 (2) ◽

pp. 241 ◽

Cited By ~ 17

Author(s):

Jian Guo ◽

Yaqin Song ◽

Xiaoyang Ji ◽

Lili Ji ◽

Lu Cai ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Heavy Metal Ions ◽

Ph Value ◽

Average Pore Size ◽

High Specific Surface Area ◽

Koh Activation ◽

Average Pore ◽

Effects Of Ph

The aim of this study was to optimize the adsorption performance of activated carbon (AC), derived from the shell of Penaeus vannamei prawns, on heavy metal ions. Inexpensive, non-toxic, and renewable prawn shells were subjected to carbonization and, subsequently, KOH-activation to produce nanoporous K-Ac. Carbonized prawn shells (CPS) and nanoporous KOH-activated carbon (K-Ac) from prawn shells were prepared and characterized by FTIR, XRD, BET, SEM, and TEM. The results showed that as-produced K-Ac samples were a porous material with microporous and mesoporous structures and had a high specific surface area of 3160 m2/g, average pore size of about 10 nm, and large pore volume of 2.38 m3/g. Furthermore, batches of K-Ac samples were employed for testing the adsorption behavior of Cd2+ in solution. The effects of pH value, initial concentration, and adsorption time on Cd2+ were systematically investigated. Kinetics and isotherm model analysis of the adsorption of Cd2+ on K-Ac showed that experimental data were not only consistent with the Langmuir adsorption isotherm, but also well-described by the quasi-first-order model. Finally, the adsorption behaviors of as-prepared K-Ac were also tested in a ternary mixture of heavy metal ions Cu2+, Cr6+, and Cd2+, and the total adsorption amount of 560 mg/g was obtained.

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Preparation of activated carbon from Tunisian olive-waste cakes and its application for adsorption of heavy metal ions

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2008.06.041 ◽

2009 ◽

Vol 162 (2-3) ◽

pp. 1522-1529 ◽

Cited By ~ 248

Author(s):

R. Baccar ◽

J. Bouzid ◽

M. Feki ◽

A. Montiel

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Heavy Metal Ions ◽

Olive Waste

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Adsorption of Heavy Metal Ions onto Insolubilized Humic Acid

Journal of Colloid and Interface Science ◽

10.1006/jcis.1995.1207 ◽

1995 ◽

Vol 171 (2) ◽

pp. 490-494 ◽

Cited By ~ 80

Author(s):

Hideshi Seki ◽

Akira Suzuki

Keyword(s):

Heavy Metal ◽

Humic Acid ◽

Metal Ions ◽

Heavy Metal Ions

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Porous carbon nanosheets functionalized with Fe3O4 nanoparticles for capacitive removal of heavy metal ions from water

Environmental Science Water Research & Technology ◽

10.1039/c9ew00472f ◽

2020 ◽

Vol 6 (2) ◽

pp. 331-340 ◽

Cited By ~ 4

Author(s):

Cuijiao Zhao ◽

Xinlei Wang ◽

Shengbo Zhang ◽

Na Sun ◽

Hongjian Zhou ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Porous Carbon ◽

Fe3o4 Nanoparticles ◽

Heavy Metal Ions ◽

Porous Graphitic Carbon ◽

Capacitive Deionization ◽

Efficient Removal ◽

Carbon Nanosheets

Porous graphitic carbon nanosheets functionalized by ultrafine Fe3O4 NPs and amino-functionalized activated carbon were developed to construct a hybrids capacitive deionization for efficient removal of multiple heavy metal ions in water.

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