Study of the possibility of regeneration of activated carbon spent in water treatment processes using the chemical regeneration and thermal reactivation

Samonin, V. V.; Podvyaznikov, M. L.; Соловьев, В. Н.; Kiseleva, V. L.; Khrylova, E. D.; Спиридонова, Е. А.

doi:10.1134/s1070427213080119

Cited by 10 publications

(5 citation statements)

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“…The adsorption equilibrium was analyzed using the Langmuir and Freundlich adsorption models. The Langmuir model was represented by the equation: 1 1…”

Section: The Study On the Methylene Blue Adsorption Capacity Of Activ...mentioning

confidence: 99%

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REGENERATION OF ACTIVATED CARBON AFTER ADSORPTION OF DYE USING PERACETIC ACID. PART 1: EFFECTS OF METAL IONS, pH, REGENERATION TIME, AND ACID CONCENTRATION

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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Активированный уголь нашел широкое применение в различных отраслях промышленности для очистки сточных вод от загрязнений. Однако с течением времени его эффективность снижается, поскольку активные центры на поверхности угля постепенно насыщаются загрязняющими веществами, присутствующими в воде. Поэтому основная цель данного исследования заключается в поиске потенциального метода восстановления насыщенного метиленовым синим (MB) активированного угля с использованием перуксусной кислоты (PAA) в качестве окислительного агента. Результаты исследования подтверждают эффективность PAA в разложении молекул MB. Кроме того, было отмечено, что наличие ионов кобальта (Co 2+ ) действует в качестве катализатора, существенно усиливая процесс окисления. Такой подход позволяет полностью удалить MB из активированного угля и восстановить его адсорбционную способность, не повреждая структуру угля и не образуя опасных побочных продуктов. Для определения оптимальных параметров процесса восстановления активированного угля исследователи тщательно изучали различные условия. Исследование показало, что наилучшие результаты достигаются при поддержании уровня pH в диапазоне от 6 до 7, использовании концентрации PAA 2,4 мМ, проведении реакции при комнатной температуре и продолжительности реакции 120 мин. При таких оптимальных условиях удалось достичь восстановительной эффективности впечатляющих 98%, что свидетельствует о высокой эффективности предложенного метода восстановления активированного угля, насыщенного метиленовым синим. Исходя из этих обнадеживающих результатов, можно сделать вывод о том, что перуксусная кислота (PAA) обладает огромным потенциалом в качестве окислительного агента для регенерации активированного угля.

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“…The adsorption equilibrium was analyzed using the Langmuir and Freundlich adsorption models. The Langmuir model was represented by the equation: 1 1…”

Section: The Study On the Methylene Blue Adsorption Capacity Of Activ...mentioning

confidence: 99%

“…However, its reusability is limited by the difficulty of regeneration. Various regeneration methods have been studied, including thermal, steam, biological, and chemical methods [1][2][3]. The thermal method involves three stages: (1) drying at 105 C, (2) pyrolysis in inert gas, and (3) gasification of the remaining organic compounds.…”

Section: Introductionmentioning

confidence: 99%

REGENERATION OF ACTIVATED CARBON AFTER ADSORPTION OF DYE USING PERACETIC ACID. PART 1: EFFECTS OF METAL IONS, pH, REGENERATION TIME, AND ACID CONCENTRATION

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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“…AC can be regenerated and it can recover at least 80% of its original adsorption capacity [11]. Several reactivation or regeneration technologies have been used to treat the exhausted activated carbon such as thermal [12][13][14], chemical [15][16][17], ultrasonic methods, microwave regeneration [18][19][20][21] ion-exchanged [22,23] and photo-oxidation [24,25].…”

Section: Introduction mentioning

confidence: 99%

Comparison of Two Water Regeneration Strategies for Activated Carbon Loaded with Hydrogen Sulphide Gas

Cosarsonas¹,

Rustum²,

García³

2016

MESE

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This work compares two different types of water regeneration methods, continuous washing and intermittent washing, that are applied to catalytically enhanced activated carbon previously loaded with hydrogen sulfide gas. The efficiency of the two regeneration methods was evaluated using Thermo Gravimetric Analysis (TGA), Coulorimetric titration using Karl Fisher reagent and apparent density "as is". The effectiveness of both methods in terms of regenerability, apparent density, and sulphur and organic loading was investigated. Results demonstrated that regeneration of the activated carbon by intermittent washing is more effective than by a continuous washing, as the former was able to remove more sulphur and organic loading from the activated carbon material than the latter, hence retaining its adsorption capacity.

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“…가열재생은 수처리 등 산업 공정에서 여러 오 염물질을 한번에 제거하여 효율적인 활성탄 재생 방법이지만, 활성탄의 흡착력을 약 5-10%가량 감소시키고, 약 800℃ 이상 의 고온을 사용해 높은 에너지 사용량으로 재생 비용이 높은 단점이 있다. 7,8) 이와 비교하였을 때, 화학적 재생법은 비용, 시간적인 측면에서 이점이 있어, 활성탄 및 오염물질에 따라 적합한 금속이나 금속염을 활성탄 표면에 함침시켜 화학적…”

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Improving Stormwater Runoff Quality using Wasted activated Carbon from a Household Water Purifier

Choi¹,

Shin²,

Chae³

et al. 2023

J Korean Soc Environ Eng

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Objectives : To recycle the wasted activated carbon from water purifiers and reuse stormwater runoff, this study evaluated water quality of stormwater runoff with regeneration using granular activated carbon containing commercial activated carbon for water treatment and wasted activated carbon from household water purifiers.Methods : The removal of total coliforms, chloride, BOD, T-N, T-P, turbidity, and pH in stormwater runoff were analyzed by down-flow column test using granular activated carbon with varied mixing ratios. In addition, chemical modification with ferrous sulfate and ultrasonic treatment were conducted to improve the removal efficiency of total coliforms, and turbidity.Results and Discussion : The optimal mixing ratio of granular activated carbon was 7:3 (GAC:WGAC), which showed high removal efficiency of 88.2% for total coliforms, 70.8% for chloride, 72.6% for BOD, 88.4% for T-N, 50.7% for T-P, and 85.9% for turbidity. The granular activated carbon with surface modification using a 0.2 M FeSO<sub>4</sub> solution with ultrasonic treatment demonstrated the highest removal efficiency, with a reduction of 11.8% in total coliforms, 29.2% in chloride, 12.1% in BOD, 20.3% in T-P, and 13.2% in turbidity, while T-N showed a decrease of 19.4% in removal efficiency.Conclusion : The granular activated carbon with a 7:3 mixing ratio showed highest removal efficiencies for all water quality parameters, while the total coliforms and turbidity did not meet the water quality standards for reclaimed water. This indicated that further physicochemical surface modification with FeSO<sub>4</sub> and ultrasonic treatment was needed to improve the removal performance and meet the water quality standards for reclaimed water. This approach explored in this study using wasted activated carbon should be continued in the area of resource and water circulation to properly utilize resources of wastes.

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Study of the possibility of regeneration of activated carbon spent in water treatment processes using the chemical regeneration and thermal reactivation

Cited by 10 publications

References 0 publications

REGENERATION OF ACTIVATED CARBON AFTER ADSORPTION OF DYE USING PERACETIC ACID. PART 1: EFFECTS OF METAL IONS, pH, REGENERATION TIME, AND ACID CONCENTRATION

REGENERATION OF ACTIVATED CARBON AFTER ADSORPTION OF DYE USING PERACETIC ACID. PART 1: EFFECTS OF METAL IONS, pH, REGENERATION TIME, AND ACID CONCENTRATION

Comparison of Two Water Regeneration Strategies for Activated Carbon Loaded with Hydrogen Sulphide Gas

Improving Stormwater Runoff Quality using Wasted activated Carbon from a Household Water Purifier

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