Competitive Sorption of Metal Ions on Titanium Phosphate Sorbent (TiP1) in Fixed-Bed Columns: A Closed-Mine Waters Study

The first report on sorption behaviour of a titanium phosphate sorbent containing entirely –H2PO4 groups reveals a high exchange capacity and fast kinetics.

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Simulated Biosorption of Cd(II) and Cu(II) in Single and Binary Metal Systems by Water Hyacinth (Eichhornia crassipes) using Aspen Adsorption

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.49892 ◽

2017 ◽

Vol 16 (2) ◽

pp. 21 ◽

Cited By ~ 1

Author(s):

Adonis P. Adornado ◽

Allan N. Soriano ◽

Omar Nassif Orfiana ◽

Mark Brandon J. Pangon ◽

Aileen D. Nieva

Keyword(s):

Heavy Metal ◽

Water Hyacinth ◽

Eichhornia Crassipes ◽

Metal Uptake ◽

Process Analysis ◽

Fixed Bed ◽

Breakthrough Curves ◽

Competitive Sorption ◽

Metal System ◽

Binary Metal

Biosorption is becoming an attractive alternative for the removal of heavy metal from contaminated wastewaters since it offers low capital and operating costs. It has a great potential on heavy metal decontamination and the possibility of metal recovery. The study evaluated the performance of water hyacinth (Eichhornia crassipes) in a fixed bed column on sequestering heavy metals present in wastewaters. Column breakthrough curves at varying parameters were evaluated. The study used Aspen Adsorption® to simulate the biosorption process. Analysis of breakthrough curves for the single metal system shows that increasing both influent flow rate and initial metal concentration reduces the metal uptake of the column, while increasing bed height enhances the metal uptake of the column. Presence of both Cd(II) and Cu(II) in the system promotes competitive sorption processes. Analysis of the breakthrough curves for the binary metal system showed that copper ions adsorbed to the adsorbent are replaced by cadmium ions when the maximum capacity of the column is reached. This leads to the outlet concentration of Cu(II) exceeding its initial concentration. This phenomenon shows that Cd(II) has more affinity with E. crassipes than Cu(II).

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Influence of Metal Ions on Biomass Pyrolysis Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.278-280.440 ◽

2013 ◽

Vol 278-280 ◽

pp. 440-443

Author(s):

Rui Rui Xiao ◽

Wei Yang ◽

Guang Suo Yu

Keyword(s):

Metal Ions ◽

Fixed Bed ◽

Earth Metal ◽

Gas Production ◽

Fixed Bed Reactor ◽

Recombination Reaction ◽

Pyrolysis Process ◽

Biomass Pyrolysis ◽

Large Molecular Weight ◽

Alkaline Earth Metal Ions

In order to understand the behavior of biomass pyrolysis, a series of pretreatment biomass were prepared with acid-washing and metal impregnated methods. The effects of metal ions on the yields of tar, char and gas from straw pyrolysis were analyzed in our lab scale fixed-bed reactor. Alkali metal and alkaline earth metal ions affect biomass pyrolysis process and the products heavily. The decreasing metal ions result in declining yield of semi-char and increasing yields of tar and gas. Meanwhile, the pyrolysis temperature corresponding maxium yield of tar increases. There exist marked catalytic effect of potassium, calcium and magnesium cations on the cracking of large molecular weight parts of tar and semi-char formation via recombination reaction of tar. As cause a higher production of char while a decrease of tar and gas production.

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