Enhanced adsorption of Cu(II) and Cd(II) by phosphoric acid-modified biochars

Peng, Hongbo; Gao, Peng; Chu, Gang; Pan, Bo; Peng, Jinhui; Xing, Baoshan

doi:10.1016/j.envpol.2017.07.004

Cited by 400 publications

(121 citation statements)

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“…This structural change could be attributed to the NaOH treatment. Similar findings were also found in other studies . The EDS peaks of Na were identified in NaOH/AC samples as shown in Figure B‐D, indicating the presence of NaOH in the NaOH/AC filter.…”

Section: Resultssupporting

confidence: 90%

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Wang

Nam

Gebreegziabher

et al. 2020

Engineering Reports

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Excessive exposure to hydrogen sulfide (H 2 S) and acetic acid (CH 3 COOH) gases is extremely dangerous in a confined space. An effective indoor air pollutant removal porous carbon filter was developed using NaOH impregnated on activated carbon (NaOH/AC) for the adsorption of H 2 S and CH 3 COOH. Activated carbon (NaOH/AC) filter was characterized using various methods, indicating good physical and chemical properties (especially -OH functional groups) for the adsorption of air pollutants. The prepared NaOH/AC filter was cured at different curing temperatures and residence times to understand the effect of the curing conditions on the adsorption performance. The best results were obtained with NaOH/AC filter cured at 100 • C for 20 minutes as it eliminated the initial concentration of 400 ppm of CH 3 COOH in 15 minutes and H 2 S in 30 minutes at 20 • C and 60% relative humidity. Isotherm and kinetic models were used to analyze the adsorption process. Langmuir isotherm and pseudo-second order kinetic models provided the best fit to the adsorption of CH 3 COOH and H 2 S on NaOH/AC filter. The adsorption mechanism was controlled by the intraparticle diffusion combined with film diffusion. The maximum adsorption capacity of NaOH/AC filter was 473 mg/g for H 2 S adsorption, and 550 mg/g for CH 3 COOH adsorption. In addition, the spent NaOH/AC filter was regenerated for reuse.This study is expected to develop low-cost and effective porous carbon filter using NaOH-modified activated carbon for indoor air purification.

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Section: Resultssupporting

confidence: 90%

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Wang

Nam

Gebreegziabher

et al. 2020

Engineering Reports

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“…5, 6 Therefore, to secure the biota (plants, animals and ecological environment), many researchers focus on the treatments of metal polluted wastewater via different methods and processes including adsorption, chemical precipitation, and electrochemical methods. [7][8][9][10][11][12][13] Among all water treatment technologies, adsorption is presumed to be effective and easy to carry out. [14][15][16] In addition to this, novel and efficient adsorbents have been synthesized and applied in various elds of production and life.…”

Section: Introductionmentioning

confidence: 99%

Appraisal of Cu(ii) adsorption by graphene oxide and its modelling via artificial neural network

et al. 2019

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“…4. The peaks centered at 284.8, 286.3 and 288.6 eV represented C-C, C-O and -CO 2groups, 34,35 respectively. Both biochars were consisted of C-C/ C]C, C-O and -CO 2groups.…”

Section: Biochar Characterizationmentioning

confidence: 99%

Enhancing the adsorption capability of areca leaf biochar for methylene blue by K₂FeO₄-catalyzed oxidative pyrolysis at low temperature

et al. 2019

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Enhanced adsorption of Cu(II) and Cd(II) by phosphoric acid-modified biochars

Cited by 400 publications

References 50 publications

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Appraisal of Cu(ii) adsorption by graphene oxide and its modelling via artificial neural network

Enhancing the adsorption capability of areca leaf biochar for methylene blue by K₂FeO₄-catalyzed oxidative pyrolysis at low temperature

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Enhanced adsorption of Cu(II) and Cd(II) by phosphoric acid-modified biochars

Cited by 400 publications

References 50 publications

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification

Appraisal of Cu(ii) adsorption by graphene oxide and its modelling via artificial neural network

Enhancing the adsorption capability of areca leaf biochar for methylene blue by K2FeO4-catalyzed oxidative pyrolysis at low temperature

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Enhancing the adsorption capability of areca leaf biochar for methylene blue by K₂FeO₄-catalyzed oxidative pyrolysis at low temperature