Removal of methylene blue from water using okra (Abelmoschus esculentus L.) mucilage modified biochar

Biochar is an interesting adsorbent material due to its use is correlated with biomass waste utilization and also minimize environmental pollution from high amount of biomass by-product. Regarding to improve the biochar ability in water treatment, several surface modifications have been developed, one of them is modification using surfactant. In this study, sodium dodecylbenzene sulfonate (SDBS) was used to modify the surface of biochar prepared from pyrolysis of cassava peels (Manihot utilissima). Its performance in biochar modification to remove methylene blue (MB) dyes was compared with sodium dodecyl sulphate (SDS) surfactant for observing the important of – interactions mechanisms. The analysis of biochar and biochar-SDBS were conducted by using Fourier transform infrared (FTIR), CHNS elemental analysis, and scanning electron microscope (SEM). Furthermore, the adsorption experiments were conducted using UV-Vis spectrophotometer. It is known that modification using SDBS could increase the adsorption capacity of biochar not only from electrostatic interaction but also through – interactions mechanisms. In this respect, as the amount of SDBS mass increased, the adsorption capacity was also improved due to the modification produced more active cites on biochar. The maximum MB adsorption onto biochar-SDBS occurred at adsorbent mass of 15 mg with optimum pH value of 10. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Green and efficient biosorptive removal of methylene blue by Abelmoschus esculentus seed: Process optimization and multi-variate modeling

Journal of Environmental Management ◽

10.1016/j.jenvman.2017.05.045 ◽

2017 ◽

Vol 200 ◽

pp. 145-159 ◽

Cited By ~ 39

Author(s):

Ashish Kumar Nayak ◽

Anjali Pal

Keyword(s):

Methylene Blue ◽

Process Optimization ◽

Abelmoschus Esculentus

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Preparation of KOH and H3PO4 Modified Biochar and Its Application in Methylene Blue Removal from Aqueous Solution

Processes ◽

10.3390/pr7120891 ◽

2019 ◽

Vol 7 (12) ◽

pp. 891 ◽

Cited By ~ 4

Author(s):

Li Liu ◽

Yang Li ◽

Shisuo Fan

Keyword(s):

Methylene Blue ◽

Photoelectron Spectroscopy ◽

Textile Wastewater ◽

Physical Interaction ◽

Order Kinetic ◽

X Ray Diffraction ◽

X Ray ◽

Modified Biochar ◽

Quality Of Water ◽

Pseudo Second Order

Improperly treated or directly discharged into the environment, wastewater containing dyes can destroy the quality of water bodies and pollute the ecological environment. The removal of dye wastewater is urgent and essential. In this study, corn stalk was pyrolyzed to pristine biochar (CSBC) in a limited oxygen atmosphere and modified using KOH and H3PO4 (KOH-CSBC, H3PO4-CSBC, respectively). The biochars were characterized by surface area and pore size, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), as well as their behavior in adsorbing methylene blue (MB). Results indicated that the pore structure of CSBC became more developed after modification by KOH. Meanwhile, H3PO4-CSBC contained more functional groups after activation treatment. The pseudo-second-order kinetic and the Langmuir adsorption isotherm represented the adsorption process well. The maximum MB adsorption capacity of CSBC, KOH-CSBC, and H3PO4-CSBC was 43.14 mg g−1, 406.43 mg g−1 and 230.39 mg g−1, respectively. Chemical modification significantly enhanced the adsorption of MB onto biochar, especially for KOH-CSBC. The adsorption mechanism between MB and biochar involved physical interaction, electrostatic interaction, hydrogen bonding and π–π interaction. Hence, modified CSBC (especially KOH-CSBC) has the potential for use as an adsorbent to remove dye from textile wastewater.

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Multi-step preparation of Fe and Si modified biochar derived from waterworks sludge towards methylene blue adsorption

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.114297 ◽

2022 ◽

Vol 304 ◽

pp. 114297

Author(s):

Jiaran Xi ◽

Rui Zhang ◽

Lei Ye ◽

Xinyuan Du ◽

Xuebin Lu

Keyword(s):

Methylene Blue ◽

Methylene Blue Adsorption ◽

Modified Biochar ◽

Waterworks Sludge

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Preparation of Acid- and Alkali-Modified Biochar for Removal of Methylene Blue Pigment

ACS Omega ◽

10.1021/acsomega.0c03688 ◽

2020 ◽

Vol 5 (48) ◽

pp. 30906-30922

Author(s):

Can Liu ◽

Wendong Wang ◽

Rui Wu ◽

Yun Liu ◽

Xu Lin ◽

...

Keyword(s):

Methylene Blue ◽

Blue Pigment ◽

Modified Biochar

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An Efficient Strategy for Enhancing the Adsorption Capabilities of Biochar via Sequential KMnO4-Promoted Oxidative Pyrolysis and H2O2 Oxidation

Sustainability ◽

10.3390/su13052641 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2641

Author(s):

Siyao Bian ◽

Shuang Xu ◽

Zhibing Yin ◽

Sen Liu ◽

Jihui Li ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Manganese Oxides ◽

Pyrolysis Temperature ◽

Optimal Temperature ◽

High Adsorption ◽

Modified Biochar ◽

Oxidative Pyrolysis ◽

Adsorption Capacities ◽

H2o2 Oxidation

In this study, sequential KMnO4-promoted oxidative pyrolysis and H2O2 oxidation were employed to upgrade the adsorption capacities of durian shell biochar for methylene blue (MB) and tetracycline (TC) in an aqueous solution. It was found that the KMnO4/H2O2 co-modification was greatly influenced by pyrolysis temperature and the optimal temperature was 300 °C. Moreover, a low concentration of H2O2 enabled the improvement of the adsorption capabilities greatly with the catalysis of pre-impregnated manganese oxides, addressing the shortcoming of single H2O2 modification. The co-modified biochar exhibited high adsorption capabilities for MB and TC, remarkably surpassed KMnO4- and H2O2- modified biochars as well as pristine biochar. The increase of adsorption capabilities could be mainly contributed to the incorporation of MnOx and carboxyl by KMnO4-promoted oxidative decomposition and Mn-catalyzed H2O2 oxidation. This would provide a novel and efficient method for preparing highly adsorptive biochar using sequential KMnO4-promoted oxidative pyrolysis and H2O2 oxidation.

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A SEM and Light Microscope Study of the Epidermal Leaf Structures of the Carnivorous Plant, Sarracenia purpurea, L.

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100065833 ◽

1971 ◽

Vol 29 ◽

pp. 358-359

Author(s):

B. J. Panessa ◽

J. F. Gennaro

Keyword(s):

Methylene Blue ◽

Toluidine Blue ◽

Outer Surface ◽

Microscope Study ◽

Light Microscope ◽

Carnivorous Plant ◽

Sarracenia Purpurea ◽

Inner Surface

Tissue from the hood and sarcophagus regions were fixed in 6% glutaraldehyde in 1 M.cacodylate buffer and washed in buffer. Tissue for SEM was partially dried, attached to aluminium targets with silver conducting paint, carbon-gold coated(100-500Å), and examined in a Kent Cambridge Stereoscan S4. Tissue for the light microscope was post fixed in 1% aqueous OsO4, dehydrated in acetone (4°C), embedded in Epon 812 and sectioned at ½u on a Sorvall MT 2 ultramicrotome. Cross and longitudinal sections were cut and stained with PAS, 0.5% toluidine blue and 1% azure II-methylene blue. Measurements were made from both SEM and Light micrographs.The tissue had two structurally distinct surfaces, an outer surface with small (225-500 µ) pubescent hairs (12/mm2), numerous stoma (77/mm2), and nectar glands(8/mm2); and an inner surface with large (784-1000 µ)stiff hairs(4/mm2), fewer stoma (46/mm2) and larger, more complex glands(16/mm2), presumably of a digestive nature.

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