Novel aluminium (hydr) oxide-functionalized activated carbon derived from Raffia palm (Raphia hookeri) shells: Augmentation of its adsorptive properties for efficient fluoride uptake in aqueous media

The addition of powdered activated carbon (PAC) to activated sludge treatment systems to enhance removal of specific toxic organic compounds from wastewater was evaluated. Nine organic compounds encompassing a range of solubility, volatility, biodegradability, and adsorptive properties were studied. Kate and equilibrium investigations were conducted to quantify the removal mechanisms of volatilization, biodegradation, biosorption, and carbon adsorption. Results from steady-state bioreactor studies showed that the addition of less than 100 mg/ℓ powdered activated carbon to the influent did not enhance the removal of the biodegradable target compounds investigated: benzene, toluene, ethylbenzene, o-xylene, chlorobenzene, and nitrobenzene. Significantly improved removals of the poorly degradable and non-biodegradable compounds 1,2-dichlorobenzene, 1,2,4-trichlorobenzene, and lindane occurred at influent powdered carbon concentrations in the 12.5 to 25 mg/ℓ range. Influent powdered carbon concentrations of 100 mg/ℓ effected overall removals of greater than 90%. The addition of powdered activated carbon not only reduced effluent concentrations but also reduced the amounts of the volatile compounds stripped to the atmosphere.

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Producing Magnetic Nanocomposites from Paper Sludge for the Adsorptive Removal of Pharmaceuticals from Water—A Fractional Factorial Design

Nanomaterials ◽

10.3390/nano11020287 ◽

2021 ◽

Vol 11 (2) ◽

pp. 287

Author(s):

Luciana S. Rocha ◽

Érika M. L. Sousa ◽

María V. Gil ◽

João A. B. P. Oliveira ◽

Marta Otero ◽

...

Keyword(s):

Activated Carbon ◽

Factorial Design ◽

Fractional Factorial Design ◽

Metal Oxide Nanoparticles ◽

Aqueous Media ◽

Fractional Factorial ◽

Paper Sludge ◽

Synthesis Conditions ◽

Adsorptive Removal ◽

Iron Salts

In view of a simple after-use separation, the potentiality of producing magnetic activated carbon (MAC) by intercalation of ferromagnetic metal oxide nanoparticles in the framework of a powder activated carbon (PAC) produced from primary paper sludge was explored in this work. The synthesis conditions to produce cost effective and efficient MACs for the adsorptive removal of pharmaceuticals (amoxicillin, carbamazepine, and diclofenac) from aqueous media were evaluated. For this purpose, a fractional factorial design (FFD) was applied to assess the effect of the most significant variables (Fe3+ to Fe2+ salts ratio, PAC to iron salts ratio, temperature, and pH), on the following responses concerning the resulting MACs: Specific surface area (SBET), saturation magnetization (Ms), and adsorption percentage of amoxicillin, carbamazepine, and diclofenac. The statistical analysis revealed that the PAC to iron salts mass ratio was the main factor affecting the considered responses. A quadratic linear regression model A = f(SBET, Ms) was adjusted to the FFD data, allowing to differentiate four of the eighteen MACs produced. These MACs were distinguished by being easily recovered from aqueous phase using a permanent magnet (Ms of 22–27 emu g−1), and their high SBET (741–795 m2 g−1) were responsible for individual adsorption percentages ranging between 61% and 84% using small MAC doses (35 mg L−1).

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Statistical optimization of preparing marine macroalgae derived activated carbon/iron oxide magnetic composites for sequestering acetylsalicylic acid from aqueous media using response surface methodologys

Chemosphere ◽

10.1016/j.chemosphere.2018.10.069 ◽

2019 ◽

Vol 215 ◽

pp. 432-443 ◽

Cited By ~ 9

Author(s):

Kyung-Won Jung ◽

Brian Hyun Choi ◽

Kyung Guen Song ◽

Jae-Woo Choi

Keyword(s):

Activated Carbon ◽

Iron Oxide ◽

Acetylsalicylic Acid ◽

Response Surface ◽

Aqueous Media ◽

Statistical Optimization ◽

Marine Macroalgae ◽

Magnetic Composites ◽

Carbon Iron

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DEVELOPMENT MODEL FOR REMOVAL TOTAL IRON IN “GAMBUT WATER” FOR DRINKING WATER

Jurnal Riset Kimia ◽

10.25077/jrk.v1i2.69 ◽

2015 ◽

Vol 1 (2) ◽

pp. 170

Author(s):

Sutrisno ◽

Elizabeth Tjahjadarmawan ◽

Fifi

Keyword(s):

Drinking Water ◽

Activated Carbon ◽

Optimum Condition ◽

Aqueous Media ◽

Analytical Techniques ◽

Total Iron ◽

Calcium Hypochlorite ◽

Adsorption Technology ◽

Adsorption Processes ◽

Small Model

ABSTRACT This research is focused on characterization of activated carbon from solid waste CPO industries and applying for treatments of gambut water for iron removal in aqueous media. Key parameters in the present study include TSS, DO, pH and total phenol is also determinated. Methods of sampling and analytical techniques for measuring key parameters are by using extended method. The small model has been developed by combining of the composting and adsorption technology. The coagulant material such as filter alum, soda caustic, and calcium hypochlorite in any ratios are varied and the optimum condition is achieved. The activated carbon is used as adsorbent by using column model. The overall results show that after coagulation and adsorption processes the total iron, TSS, DO and pH are under threshold levels (Indonesian Regulation) and suitable for drinking water meanwhile other parameters are still uncovered in this investigation. Tentatively, it can be concluded that the proposed gambit water design has achieved the optimum condition. A further study on the improvement of the treatment design and service time for adsorption process is still in progress. Keywords : total iron, gambut water, activated carbon, combining model.

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