Adsorption dynamics of chlorinated hydrocarbons from multi-component aqueous solution onto activated carbon

Pełech, Robert; Milchert, Eugeniusz; Wróbel, Rafał

doi:10.1016/j.jhazmat.2006.04.023

Cited by 23 publications

(15 citation statements)

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“…The stream of environmentally noxious wastewater is generated during the production of vinyl chloride The second stage of the wastewater purification is the adsorption on the fixed bed adsorbent (activated carbon), which decreases the level of pollutants concentration to 1mg per 1 Mg and below 3,4 . Application of the integrated system of purification consisted of the steam stripper and active carbon adsorber allows to recover and utilize approx.…”

Section: Separation Of Chloroorganic Compounds From the Wastewatermentioning

confidence: 99%

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Utilization of waste chloroorganic compounds

Myszkowski

Milchert

Bartkowiak

et al. 2010

Polish Journal of Chemical Technology

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Efficient methods of utilization of waste chloroorganic compounds coming from waste water and the waste streams formed e.g. in the production of vinyl chloride by dichloroethane method and in the production of propylene oxide by chlorohydrin method have been presented. First the separation of chloroorganic wastes by the adsorption methods has been described in the article. Three valuable methods of chlorocompounds utilization have been then discussed. The first one is isomerization of 1,1,2-trichloroethane to 1,1,1-trichloroethane as the valuable product with less toxicity than a substrate. The second method is ammonolysis of waste 1,2-dichloropropane and 1,2,3-trichloropropane. The third described method is chlorolysis. This method can be used for the utilization of all types of waste chloroorganics.

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Section: Separation Of Chloroorganic Compounds From the Wastewatermentioning

confidence: 99%

“…Desorbate is pumped back to the stripping column (3) and conducted together with the steam in the bottom of the column. The condensate is cooled and separated in the phase separator (4). The organic phase is collected from the separator and consists of the recovered chloroorganic compounds.…”

Section: Ammonolysismentioning

confidence: 99%

Utilization of waste chloroorganic compounds

Myszkowski

Milchert

Bartkowiak

et al. 2010

Polish Journal of Chemical Technology

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“…Activated carbon has long been identified as an efficient and cost effective adsorbent material for the removal of various types of pol-lutants including heavy metals [13 -15], phenols [16,17], dyes [18 -21], inorganic anions [22,23], and chlorinated hydrocarbons [24,25], from water and wastewaters. The application of activated carbon for the removal of organic complexing agents such as EDTA, CA (citric acid) and NTA (nitrilotriacetic acid) have all been reported in the literature [12,26,27].…”

Section: Introductionmentioning

confidence: 99%

Removal of EDTA from Aqueous Solutions Using Activated Carbon Prepared from Rubber Wood Sawdust: Kinetic and Equilibrium Modeling

Krishnan

Sreejalekshmi

Varghese

et al. 2010

CLEAN Soil Air Water

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Adsorptive removal of EDTA (ethylenediaminetetraacetic acid) from aqueous solution was studied using steam pyrolyzed activated carbon. Rubber wood sawdust, obtained from a local timber facility at Kodangavila, Trivandrum, Kerala, India was used as the precursor for the production of the activated carbon. Batch adsorption experiments were employed to monitor and optimize the removal process. The experimental parameters, i. e., solution pH, agitation time, initial EDTA concentration and adsorbent dosage, affecting the adsorption of EDTA onto sawdust activated carbon (SDAC) were optimized. The inner core mechanism for the interaction between EDTA and SDAC, which resulted in the adsorption process, was also discussed. The change in amount of EDTA adsorbed onto SDAC and CAC (commercial activated carbon) was compared over a wide range of pH (2.0 -8.0). The maximum removal of EDTA took place in the pH range of 4.0 -6.0 for SDAC and 5.0 -5.5 for CAC, which demonstrates the effectiveness of the former adsorbent. Kinetic as well as equilibrium studies were performed to determine the rate constant and adsorption capacity, respectively. The adsorption kinetic data was fitted with pseudo-first-order kinetics and the equilibrium data was shown to follow the Langmuir isotherm model. These observations explain the formation of a monolayer of EDTA on the surface of SDAC as confirmed by the slow approach to equilibrium after 4 h of contact time. The adsorption capacity of SDAC for the removal of EDTA was 0.526 mmol/g and is seen to be greater than that of CAC and other reported adsorbents (0.193 -0.439 mmol/g). Finally, it is clear that the production of steam pyrolyzed activated carbon in the presence of K 2 CO 3 greatly enhanced EDTA removal and resulted in a product with possible commercial value for wastewater treatment strategies.

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“…AC has a high surface area and wide pore distribution. The individual adsorption of chlorinated solvents [10][11][12][13] or surfactants [6,[14][15][16][17][18] onto AC has been reported. But in a co-existing solution, adsorption characteristics might be quite different.…”

Section: Introductionmentioning

confidence: 99%