Performance of dissolved organic matter removal from membrane bioreactor effluent by magnetic powdered activated carbon

Ittisupornrat, Suda; Phihusut, Doungkamon; Kitkaew, Duangta; Sangkarak, Sirirat; Phetrak, Athit

doi:10.1016/j.jenvman.2019.109314

Cited by 18 publications

(3 citation statements)

References 44 publications

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“…Based on the PSO model results, it might be concluded that the ratio between the square of the number of vacant sites on the adsorbents and the occupancy rate of adsorption sites was linear . In addition, the better fit of data to the PSO model than that to the PFO model can be attributed to chemical absorption processes, such as hydrogen bonds and π–π interactions, which may be more dominant in the adsorption of organic matter to the adsorbent. ,, …”

Section: Resultsmentioning

confidence: 98%

“… 62 In addition, the better fit of data to the PSO model than that to the PFO model can be attributed to chemical absorption processes, such as hydrogen bonds and π–π interactions, which may be more dominant in the adsorption of organic matter to the adsorbent. 7 , 63 , 64 …”

Section: Resultsmentioning

confidence: 99%

“…62 In addition, the better fit of data to the PSO model than that to the PFO model can be attributed to chemical absorption processes, such as hydrogen bonds and π−π interactions, which may be more dominant in the adsorption of organic matter to the adsorbent. 7,63,64 The PSO rate constant (k 2 ) and initial sorption rate (H) for the adsorbents tested in this study displayed various ordering. The rate constants (k 2 ) of the PSO model and the initial sorption rate constants (H) followed the order of Norit SX Ultra > Norit SX F Cat ≥ Norit CA1 > AC Puriss and Norit SX Ultra > Norit SX F Cat > AC Puriss ≥ Norit CA1, respectively.…”

Section: Characterization Of Adsorbentsmentioning

confidence: 90%

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Impact of Natural Organic Matter Competition on the Adsorptive Removal of Acetochlor and Metolachlor from Low-Specific UV Absorbance Surface Waters

Yilmaz,

Altiparmak,

Dadaser-Celik

et al. 2023

ACS Omega

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Although activated carbon adsorption is a very promising process for the removal of organic compounds from surface waters, the removal performance for nonionic pesticides could be adversely affected by co-occurring natural organic matter. Natural organic matter can compete with pesticides during the adsorption process, and the size of natural organic matter affects the removal of pesticides, as low-molecular-weight organics directly compete for adsorbent sites with pesticides. This study aims to investigate the competitive impact of low-molecular-weight organics on the adsorptive removal of acetochlor and metolachlor by four commercial powdered activated carbons. The adsorption features of selected powdered activated carbons were evaluated in surface water samples collected from the influent stream of the filtration process having 2.75 mg/L organic matter and 0.87 L/mg-m specific UV absorbance. The adsorption kinetics and capacities were examined by employing pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models and modified Freundlich and Langmuir isotherm models to the experimental data. The competitive removal of acetochlor and metolachlor in the presence of natural organic matter was evaluated for varied powdered activated carbon dosages on the basis of UV and specific UV absorbance values of adsorbed organic matter. The adsorption data were well represented by the modified Freundlich isotherm, as well as pseudo-second-order kinetics. The maximum organic matter adsorption capacities of the modified Freundlich isotherm were observed to be 120.6 and 127.2 mg/g by Norit SX Ultra and 99.5 and 100.6 mg/g by AC Puriss for acetochlor-and metolachlorcontaining water samples, respectively. Among the four powdered activated carbons, Norit SX Ultra and AC Puriss provided the highest natural organic matter removal performances with 76 and 72% and 71 and 65% for acetochlor-and metolachlor-containing samples, respectively. Similarly, Norit SX Ultra and AC Puriss were very effective for adsorbing aromatic organics with higher than 80% specific UV absorbance removal efficiency. Metolachlor was almost completely removed by higher than 98% by Norit SX Ultra, Norit SX F Cat, and AC Puriss, even at low adsorbent dosages. However, an adsorbent dose of 100 mg/L and above should be added for all powdered activated carbons, except for Norit SX F Cat, for achieving an acetochlor removal performance of higher than 98%. The competition between low-molecular-weight organics (low-specific UV absorbance) and acetochlor and metolachlor was more apparent at low adsorbent dosages (10−75 mg/L).

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Adsorbentsmentioning

confidence: 90%

See 1 more Smart Citation

Impact of Natural Organic Matter Competition on the Adsorptive Removal of Acetochlor and Metolachlor from Low-Specific UV Absorbance Surface Waters

Yilmaz,

Altiparmak,

Dadaser-Celik

et al. 2023

ACS Omega

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Preparation of polyacrylamide–montmorillonite nanocomposite and its application in Cr(III) adsorption

Qiu

Komarneni

et al. 2020

J of Applied Polymer Sci

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The polyacrylamide–montmorillonite “water in water” (PAM‐MMT W/W) emulsion was prepared by dispersion polymerization method in the presence of organo‐montmorillonite (OMMT). Based on the analysis of the polymerization process, the structure of material was investigated using thermogravimetry, Fourier transform infrared spectroscopy, X‐ray diffractometry, scanning electron microscopy, and transmission electron microscopy experiments. Here, the dispersion was determined to be a blend of PAM W/W emulsion and PAM network interspersed by MMT particles, this unique structure of the material was considered to provide better adsorption ability compared to PAM without MMT. Therefore, a PAM‐MMT adsorbent was made from the PAM‐MMT W/W emulsion, and its adsorption capacity toward Cr(III), one of the heavy metal pollutants from the tannery waste was investigated. The PAM‐MMT nanocomposite was demonstrated to have good Cr(III) removal performance, the maximum adsorption capacity of the nanocomposite was found to be 59.74 mg/g at a pH of 5.5 and temperature of 70°C. Results show that pseudo‐second‐order kinetic model and Langmuir isotherm were applicable for Cr(III) adsorption.

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Hybrid membrane bioreactors for wastewater treatment

Tabraiz

Zeeshan

Asif

et al. 2023

Current Developments in Biotechnology and Bioengineering

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Performance of dissolved organic matter removal from membrane bioreactor effluent by magnetic powdered activated carbon

Cited by 18 publications

References 44 publications

Impact of Natural Organic Matter Competition on the Adsorptive Removal of Acetochlor and Metolachlor from Low-Specific UV Absorbance Surface Waters

Impact of Natural Organic Matter Competition on the Adsorptive Removal of Acetochlor and Metolachlor from Low-Specific UV Absorbance Surface Waters

Preparation of polyacrylamide–montmorillonite nanocomposite and its application in Cr(III) adsorption

Hybrid membrane bioreactors for wastewater treatment

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