Nanoporous activated carbon for fast uptake of heavy metals from aqueous solution

In this study, nano-adsorbent materials were synthesized from two different precursors by thermal activation technique. The first was the synthesizing of nano-zinc silicate from chemical reagents of zinc oxide and commercial silica gel. The second was the preparation of nano-pore size activated carbon from different biomass. The synthesized nano-adsorbent materials were characterized by different techniques; Surface Area, FTIR, XRD and SEM. The prepared nano-adsorbent materials were applied in the sorption and separation of some heavy metals from aqueous solution. These metals includes; Pb (II), Ni(II), Co(II), Mn(II) and Li(I). Some factors affecting on the sorption process (e.g. contact time and pH) were investigated. It was found that: the nano-zinc silicate (of ratio 1:1 thermally treated at 700 0C) and nano-pores activated carbon (prepared from saw dust impregnated with 70% H3PO4 overnight, then heated to 500 0C in presence of steam for 80 min.) were the best samples for sorption and separation of concerned heavy metals.

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Competitive Adsorption of Heavy Metals from Aqueous Solution onto Oxidized Activated Carbon Fiber

Water Air & Soil Pollution ◽

10.1007/s11270-018-3906-y ◽

2018 ◽

Vol 229 (8) ◽

Cited By ~ 7

Author(s):

Maria Selene Berber-Mendoza ◽

Jesús Ivan Martínez-Costa ◽

Roberto Leyva-Ramos ◽

Hector Javier Amezquita Garcia ◽

Nahúm Andrés Medellín Castillo

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Activated Carbon ◽

Carbon Fiber ◽

Competitive Adsorption ◽

Activated Carbon Fiber ◽

Oxidized Activated Carbon

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Biosorption of toxic heavy metals from aqueous solution by Ulva lactuca activated carbon

Egyptian Journal of Basic and Applied Sciences ◽

10.1016/j.ejbas.2016.07.005 ◽

2016 ◽

Vol 3 (3) ◽

pp. 241-249 ◽

Cited By ~ 60

Author(s):

Wael M. Ibrahim ◽

Asad F. Hassan ◽

Yahia A. Azab

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Activated Carbon ◽

Ulva Lactuca ◽

Toxic Heavy Metals

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Environmental Management: Pragmatic Suitability of Low Cost Activated Carbon in Lead (II)Ion Removal by Continuous Mode of Adsorption

Nature Environment and Pollution Technology ◽

10.46488/nept.2021.v20i04.053 ◽

2021 ◽

Vol 20 (4) ◽

Author(s):

R. Sivarethinamohan ◽

S. Sujatha

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Activated Carbon ◽

Natural Waters ◽

Activated Carbons ◽

Fixed Bed ◽

Adequate Treatment ◽

Initial Concentration ◽

Saturation Time ◽

Bed Height

Heavy metals such as chromium, lead, and arsenic are usually present in trace amounts in natural waters but many of them are toxic even at very low concentrations. An increasing quantity of heavy metals in our resources is currently an area of greater concern, especially since a large number of industries are discharging their metal containing effluents into freshwater without any adequate treatment. Activated carbons show a significant ability in removing heavy metal ions from an aqueous solution by adsorption, which has been examined by many researchers. Activated carbon derived from Manilkarazapota tree-wood (MZTWAC), which was found to be a suitable adsorbent for the removal of lead ions through continuous adsorption mode, was examined in this paper. A breakthrough curve has been plotted to find the effect of initial concentration and adsorbent bed height in the adsorption of lead (II)ion through MZTWAC. The breakthrough time and the saturation time increased as the initial concentration increased from 40 mg.L-1 to 60 mg.L-1. The saturation time was in the incremental mode when the bed height was increased from 5 cm to 7 cm bed thickness for 40 mg.L-1 concentration. Adams-Bohart’s model perfectly fits with this fixed-bed column in the removal of lead(II) from an aqueous solution using MZTWAC. Activated carbon derived from MZTWAC is better suited for the purpose of detoxifying metal-contaminated wastewater.

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