Evaluation of Gas Retention in Waste Simulants: Tall Column Experiments

2014 ◽  
Author(s):  
Philip Schonewill ◽  
Phillip Gauglitz ◽  
Rick Shimskey ◽  
Kayte Denslow ◽  
Michael Powell ◽  
...  
Keyword(s):  
Column Experiments

Rates of Aluminum Dissolution in Acid Sandy Soils Observed in Column Experiments

1992 ◽  
Vol 21 (3) ◽  
pp. 439-447 ◽  
Author(s):  
Hans J.M. Grinsven ◽  
Willem H. Riemsdijk ◽  
René Otjes ◽  
Nico Breemen
Keyword(s):  
Sandy Soils ◽  
Column Experiments

Application of iron-coated sand on the treatment of toxic metals

2004 ◽  
Vol 4 (5-6) ◽  
pp. 335-341 ◽  
Author(s):  
Jae-Kyu Yang ◽  
Yoon-Young Chang ◽  
Sung-Il Lee ◽  
Hyung-Jin Choi ◽  
Seung-Mok Lee
Keyword(s):  
Heavy Metals ◽  
Selective Adsorption ◽  
Complete Removal ◽  
Batch Adsorption ◽  
Column Experiments ◽  
Adsorption Behaviour ◽  
Optimum Amount ◽  
Initial Ph ◽  
New Treatment ◽  
Coated Sand

Iron-coated sand (ICS) prepared by using FeCl3 and Joomoonjin sand widely used in Korea was used in this study. In batch adsorption kinetics, As(V) adsorption onto ICS was completed within 20 minutes, while adsorption of Pb(II), Cd(II), and Cu(II) onto ICS was slower than that of As(V) and strongly depended on initial pH. At pH 3.5, ICS showed a selective adsorption of Pb(II) compared to Cd( II) and Cu(II) . However, above pH 4.5, near complete removal of Pb(II), Cd(II), and Cu(II) was observed through adsorption or precipitation depending on pH. As(V) adsorption onto ICS occurred through an anionic-type and followed a Langmuir-type adsorption behaviour. In column experiments, pH was identified as an important parameter in the breakthrough of As(V). As(V) breakthrough at pH 4.5 was much slower than at pH 9 due to a strong chemical bonding between As(V) and ICS as similar with batch adsorption behaviour. With variation of ICS amounts, the optimum amount of ICS at pH 4.5 was identified as 5.0 grams in this research. At this condition, ICS could be used to treat 200 mg of As(V) with 1 kg of ICS until 50 ppb of As(V) appeared in the effluent. In this research, as a new treatment system, ICS can be potentially used to treat As(V) and cationic heavy metals.

Phosphorus transport in saturated slag columns: experiments and mathematical models

1996 ◽  
Vol 34 (1-2) ◽  
pp. 153-160 ◽  
Author(s):  
S. H. Lee ◽  
S. Vigneswaran ◽  
K. Bajracharya
Keyword(s):  
Mathematical Models ◽  
Sorption Capacity ◽  
Algal Blooms ◽  
Sandy Loam ◽  
Dynamic Condition ◽  
Water Environment ◽  
Breakthrough Curves ◽  
Column Experiments ◽  
Phosphorus Transport ◽  
Waste Products

Excessive phosphorus (P as orthophosphate) is one of the major pollutants in natural water that are responsible for algal blooms and eutrophication. P removal by slag is an attractive solution if the P sorption capacity of slag is significant. To design an efficient land treatment facility, basic information on the behaviour of P in the media-water environment is required. In this study, detailed column experiments were conducted to study the P transport under dynamic condition, and mathematical models were developed to describe this process. The column experiments conducted with dust and cake waste products (slag) from a steel industry as adsorbing indicated that they had higher sorption capacity of P than that of a sandy loam soil from North Sydney, Australia. P transport in the dust and cake columns exhibited characteristic S-shaped or curvilinear breakthrough curves. The simulated results from a dynamic physical nonequilibrium sorption model (DPNSM) and Freundlich isotherm constants satisfactorily matched the corresponding experimental breakthrough data. The mobility of P is restricted by the adsorbents and it is proportional to the sorption capacity of them.

Tomographic analysis of reactive flow induced pore structure changes in column experiments

2009 ◽  
Vol 32 (9) ◽  
pp. 1396-1403 ◽  
Author(s):  
Rong Cai ◽  
W. Brent Lindquist ◽  
Wooyong Um ◽  
Keith W. Jones
Keyword(s):  
Pore Structure ◽  
Reactive Flow ◽  
Column Experiments ◽  
Structure Changes ◽  
Tomographic Analysis

Surface passivation model explains pyrite oxidation kinetics in column experiments with up to 11 bars p(O2)

2016 ◽  
Vol 75 (16) ◽  
Author(s):  
Marton Berta ◽  
Frank Dethlefsen ◽  
Markus Ebert ◽  
Karsten Gundske ◽  
Andreas Dahmke
Keyword(s):  
Oxidation Kinetics ◽  
Surface Passivation ◽  
Pyrite Oxidation ◽  
Column Experiments
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