Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu<sup>2+</sup> in Water

Taotao Sun; Mian Muhammad Ahson Aslam; Guangquan Chen; Yuchen Ye; Wentao Xu; Changsheng Peng

doi:doi:10.11648/j.earth.20241304.14

Research Article |

| Peer-Reviewed

Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu²⁺ in Water

Taotao Sun

, Mian Muhammad Ahson Aslam

, Guangquan Chen

, Yuchen Ye

, Wentao Xu

, Changsheng Peng^*

Published in Earth Sciences (Volume 13, Issue 4)

Received: 9 July 2024 Accepted: 14 August 2024 Published: 20 August 2024

Views: Downloads:

Download PDF

Share This Article

Twitter
Linked In
Facebook

Abstract

This study investigates the potential of biochar produced via a solar pyrolysis system and its effectiveness in removing copper (Cu²⁺) ions from water, presenting a sustainable and energy-efficient method for biochar production and biomass recycling. Two common agricultural and livestock wastes, corn straw and cow dung, were used as raw materials to produce biochar. These materials underwent solar pyrolysis under limited oxygen conditions to produce biochar, which was then compared to biochar produced via traditional pyrolysis. The comparison involved elemental analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area and pore size analysis to highlight differences in their physical and chemical properties. Adsorption experiments were conducted to evaluate the adsorptive capacity of biochar for copper ions (Cu²⁺) from water, determining the optimal pH conditions and underlying adsorption mechanisms. The findings reveal that biochar produced through solar pyrolysis exhibits similar properties and Cu²⁺ adsorption capacities to those prepared by traditional methods. Specifically, cow dung biochar demonstrated a higher adsorption capacity for Cu²⁺ compared to corn straw biochar. The Cu²⁺ adsorption by corn straw biochar followed the Langmuir isothermal adsorption model and pseudo-second-order kinetic equation, whereas cow dung biochar conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic equation. By demonstrating the comparable efficacy of solar pyrolysis biochar in heavy metal adsorption, this study highlights its potential for sustainable environmental remediation and biomass utilization.

Published in	Earth Sciences (Volume 13, Issue 4)
DOI	10.11648/j.earth.20241304.14
Page(s)	151-162
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Biochar, Solar Pyrolysis, Wastewater Treatment, Copper Pollution, Adsorptive Removal

References

[1]	XIE S, YU C, PENG B, et al. A re-assessment of metal pollution in the Dexing mining area in Jiangxi province, China: current status, hydro-geochemical controls, and effectiveness of remediation practices [J]. International Journal of Environmental Science and Technology, 2022, 19(11): 10707-10722. https://doi.org/10.1007/s13762-021-03887-x
[2]	DEHGHANI M H, OMRANI G A, KARRI R R. Chapter 11 - Solid Waste—Sources, Toxicity, and Their Consequences to Human Health [M]//KARRI R R, RAVINDRAN G, DEHGHANI M H. Soft Computing Techniques in Solid Waste and Wastewater Management. Elsevier. 2021: 205-213. https://doi.org/10.1016/B978-0-12-824463-0.00013-6
[3]	EL-NEMR M A, AIGBE U O, HASSAAN M A, et al. The use of biochar-NH2 produced from watermelon peels as a natural adsorbent for the removal of Cu(II) ion from water [J]. Biomass Conversion and Biorefinery, 2024, 14(2): 1975-1991. https://doi.org/10.1007/s13399-022-02327-1
[4]	NICOLAOU E, PHILIPPOU K, ANASTOPOULOS I, et al. Copper Adsorption by Magnetized Pine-Needle Biochar [J/OL] 2019, 7(12). https://doi.org/10.3390/pr7120903
[5]	SUDARNI D H A, AIGBE U O, UKHUREBOR K E, et al. Malachite Green Removal by Activated Potassium Hydroxide Clove Leaf Agrowaste Biosorbent: Characterization, Kinetic, Isotherm, and Thermodynamic Studies [J]. Adsorption Science & Technology, 2021, 2021: 1145312. https://doi.org/10.1155/2021/1145312
[6]	WANG J, WANG S. Preparation, modification and environmental application of biochar: A review [J]. Journal of Cleaner Production, 2019, 227: 1002-1022. https://doi.org/10.1016/j.jclepro.2019.04.282
[7]	ZHOU S, YANG Y-X, CAO J-J, et al. Monitoring of copper adsorption on biochar using spectral induced polarization method [J]. Environmental Research, 2024, 251: 118778. https://doi.org/10.1016/j.envres.2024.118778
[8]	AHMAD M, RAJAPAKSHA A U, LIM J E, et al. Biochar as a sorbent for contaminant management in soil and water: A review [J]. Chemosphere, 2014, 99: 19-33. https://doi.org/10.1016/j.chemosphere.2013.10.071
[9]	TRAZZI P A, LEAHY J J, HAYES M H B, et al. Adsorption and desorption of phosphate on biochars [J]. Journal of Environmental Chemical Engineering, 2016, 4(1): 37-46. https://doi.org/10.1016/j.jece.2015.11.005
[10]	MANYà J J. Pyrolysis for Biochar Purposes: A Review to Establish Current Knowledge Gaps and Research Needs [J]. Environmental Science & Technology, 2012, 46(15): 7939-7954. https://doi.org/10.1021/es301029g
[11]	ROBERTS K G, GLOY B A, JOSEPH S, et al. Life Cycle Assessment of Biochar Systems: Estimating the Energetic, Economic, and Climate Change Potential [J]. Environmental Science & Technology, 2010, 44(2): 827-833. https://doi.org/10.1021/es902266r
[12]	ZENG K, GAUTHIER D, SORIA J, et al. Solar pyrolysis of carbonaceous feedstocks: A review [J]. Solar Energy, 2017, 156: 73-92. https://doi.org/10.1016/j.solener.2017.05.033
[13]	QUAN C, GAO N, SONG Q. Pyrolysis of biomass components in a TGA and a fixed-bed reactor: Thermochemical behaviors, kinetics, and product characterization [J]. Journal of Analytical and Applied Pyrolysis, 2016, 121: 84-92. https://doi.org/10.1016/j.jaap.2016.07.005
[14]	HU M, ZHU G, CHEN Y, et al. Enhanced co-pyrolysis of corn stalk and bio-tar into phenolic-rich biooil: Kinetic analysis and product distributions [J]. Journal of Analytical and Applied Pyrolysis, 2024, 177: 106358. https://doi.org/10.1016/j.jaap.2024.106358
[15]	ZHANG D, SUN Z, FU H, et al. Upgrading of cow manure by hydrothermal carbonization: Evaluation of fuel properties, combustion behaviors and kinetics [J]. Renewable Energy, 2024, 225: 120269. https://doi.org/10.1016/j.renene.2024.120269
[16]	ZHANG C, ZHANG Z, ZHANG L, et al. Evolution of the functionalities and structures of biochar in pyrolysis of poplar in a wide temperature range [J]. Bioresource technology, 2020, 304: 123002. https://doi.org/10.1016/j.biortech.2020.123002
[17]	ZHANG P, ZHANG X, YUAN X, et al. Characteristics, adsorption behaviors, Cu(II) adsorption mechanisms by cow manure biochar derived at various pyrolysis temperatures [J]. Bioresource Technology, 2021, 331: 125013. https://doi.org/10.1016/j.biortech.2021.125013
[18]	WANG Z, ZHENG H, LUO Y, et al. Characterization and influence of biochars on nitrous oxide emission from agricultural soil [J]. Environmental Pollution, 2013, 174: 289-296. https://doi.org/10.1016/j.envpol.2012.12.003
[19]	ZHU D, KWON S, PIGNATELLO J J. Adsorption of Single-Ring Organic Compounds to Wood Charcoals Prepared under Different Thermochemical Conditions [J]. Environmental Science & Technology, 2005, 39(11): 3990-3998. https://doi.org/10.1021/es050129e
[20]	PETERSON S C, JACKSON M A. Simplifying pyrolysis: Using gasification to produce corn stover and wheat straw biochar for sorptive and horticultural media [J]. Industrial Crops and Products, 2014, 53: 228-235. https://doi.org/10.1016/j.indcrop.2013.12.028
[21]	PARIYAR P, KUMARI K, JAIN M K, et al. Evaluation of change in biochar properties derived from different feedstock and pyrolysis temperature for environmental and agricultural application [J]. Science of The Total Environment, 2020, 713: 136433. https://doi.org/10.1016/j.scitotenv.2019.136433
[22]	TURUNEN M, HYVäLUOMA J, HEIKKINEN J, et al. Quantifying the pore structure of different biochars and their impacts on the water retention properties of Sphagnum moss growing media [J]. Biosystems Engineering, 2020, 191: 96-106. https://doi.org/10.1016/j.biosystemseng.2020.01.006
[23]	KIM K H, KIM J-Y, CHO T-S, et al. Influence of pyrolysis temperature on physicochemical properties of biochar obtained from the fast pyrolysis of pitch pine (Pinus rigida) [J]. Bioresource Technology, 2012, 118: 158-162. https://doi.org/10.1016/j.biortech.2012.04.094
[24]	CHEN G, WANG C, TIAN J, et al. Investigation on cadmium ions removal from water by different raw materials-derived biochars [J]. Journal of Water Process Engineering, 2020, 35: 101223. https://doi.org/10.1016/j.jwpe.2020.101223
[25]	CHUN Y, SHENG G, CHIOU C T, et al. Compositions and Sorptive Properties of Crop Residue-Derived Chars [J]. Environmental Science & Technology, 2004, 38(17): 4649-4655. https://doi.org/10.1021/es035034w
[26]	CHEN X, CHEN G, CHEN L, et al. Adsorption of copper and zinc by biochars produced from pyrolysis of hardwood and corn straw in aqueous solution [J]. Bioresource Technology, 2011, 102(19): 8877-8884. https://doi.org/10.1016/j.biortech.2011.06.078
[27]	KOMKIENE J, BALTRENAITE E. Biochar as adsorbent for removal of heavy metal ions [Cadmium(II), Copper(II), Lead(II), Zinc(II)] from aqueous phase [J]. International Journal of Environmental Science and Technology, 2016, 13(2): 471-482. https://doi.org/10.1007/s13762-015-0873-3
[28]	LOU K, RAJAPAKSHA A U, OK Y S, et al. Sorption of copper(II) from synthetic oil sands process-affected water (OSPW) by pine sawdust biochars: effects of pyrolysis temperature and steam activation [J]. Journal of Soils and Sediments, 2016, 16(8): 2081-2089. https://doi.org/10.1007/s11368-016-1382-9
[29]	FAN S, LI H, WANG Y, et al. Cadmium removal from aqueous solution by biochar obtained by co-pyrolysis of sewage sludge with tea waste [J]. Research on Chemical Intermediates, 2018, 44(1): 135-154. https://doi.org/10.1007/s11164-017-3094-1
[30]	REGMI P, GARCIA MOSCOSO J L, KUMAR S, et al. Removal of copper and cadmium from aqueous solution using switchgrass biochar produced via hydrothermal carbonization process [J]. Journal of Environmental Management, 2012, 109: 61-69. https://doi.org/10.1016/j.jenvman.2012.04.047
[31]	MENG J, FENG X, DAI Z, et al. Adsorption characteristics of Cu(II) from aqueous solution onto biochar derived from swine manure [J]. Environmental Science and Pollution Research, 2014, 21(11): 7035-7046. https://doi.org/10.1007/s11356-014-2627-z
[32]	POO K-M, SON E-B, CHANG J-S, et al. Biochars derived from wasted marine macro-algae (Saccharina japonica and Sargassum fusiforme) and their potential for heavy metal removal in aqueous solution [J]. Journal of Environmental Management, 2018, 206: 364-372. https://doi.org/10.1016/j.jenvman.2017.10.056
[33]	JIANG S, HUANG L, NGUYEN T A H, et al. Copper and zinc adsorption by softwood and hardwood biochars under elevated sulphate-induced salinity and acidic pH conditions [J]. Chemosphere, 2016, 142: 64-71. https://doi.org/10.1016/j.chemosphere.2015.06.079
[34]	YANG G-X, JIANG H. Amino modification of biochar for enhanced adsorption of copper ions from synthetic wastewater [J]. Water Research, 2014, 48: 396-405. https://doi.org/10.1016/j.watres.2013.09.050
[35]	SONG J, HE Q, HU X, et al. Highly efficient removal of Cr(VI) and Cu(II) by biochar derived from Artemisia argyi stem [J]. Environ Sci Pollut Res Int, 2019, 26(13): 13221-13234. https://doi.org/10.1007/s11356-019-04863-2
[36]	IDREES M, BATOOL S, KALSOOM T, et al. Animal manure-derived biochars produced via fast pyrolysis for the removal of divalent copper from aqueous media [J]. Journal of Environmental Management, 2018, 213: 109-118. https://doi.org/10.1016/j.jenvman.2018.02.003
[37]	KOŁODYŃSKA D, WNĘTRZAK R, LEAHY J J, et al. Kinetic and adsorptive characterization of biochar in metal ions removal [J]. Chemical Engineering Journal, 2012, 197: 295-305. https://doi.org/10.1016/j.cej.2012.05.025

Cite This Article

Plain Text BibTeX RIS

APA Style

Sun, T., Aslam, M. M. A., Chen, G., Ye, Y., Xu, W., et al. (2024). Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sciences, 13(4), 151-162. https://doi.org/10.11648/j.earth.20241304.14

Copy | Download

ACS Style

Sun, T.; Aslam, M. M. A.; Chen, G.; Ye, Y.; Xu, W., et al. Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sci. 2024, 13(4), 151-162. doi: 10.11648/j.earth.20241304.14

Copy | Download

AMA Style

Sun T, Aslam MMA, Chen G, Ye Y, Xu W, et al. Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sci. 2024;13(4):151-162. doi: 10.11648/j.earth.20241304.14

Copy | Download

@article{10.11648/j.earth.20241304.14,
  author = {Taotao Sun and Mian Muhammad Ahson Aslam and Guangquan Chen and Yuchen Ye and Wentao Xu and Changsheng Peng},
  title = {Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water
},
  journal = {Earth Sciences},
  volume = {13},
  number = {4},
  pages = {151-162},
  doi = {10.11648/j.earth.20241304.14},
  url = {https://doi.org/10.11648/j.earth.20241304.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20241304.14},
  abstract = {This study investigates the potential of biochar produced via a solar pyrolysis system and its effectiveness in removing copper (Cu2+) ions from water, presenting a sustainable and energy-efficient method for biochar production and biomass recycling. Two common agricultural and livestock wastes, corn straw and cow dung, were used as raw materials to produce biochar. These materials underwent solar pyrolysis under limited oxygen conditions to produce biochar, which was then compared to biochar produced via traditional pyrolysis. The comparison involved elemental analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area and pore size analysis to highlight differences in their physical and chemical properties. Adsorption experiments were conducted to evaluate the adsorptive capacity of biochar for copper ions (Cu2+) from water, determining the optimal pH conditions and underlying adsorption mechanisms. The findings reveal that biochar produced through solar pyrolysis exhibits similar properties and Cu2+ adsorption capacities to those prepared by traditional methods. Specifically, cow dung biochar demonstrated a higher adsorption capacity for Cu2+ compared to corn straw biochar. The Cu2+ adsorption by corn straw biochar followed the Langmuir isothermal adsorption model and pseudo-second-order kinetic equation, whereas cow dung biochar conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic equation. By demonstrating the comparable efficacy of solar pyrolysis biochar in heavy metal adsorption, this study highlights its potential for sustainable environmental remediation and biomass utilization.
},
 year = {2024}
}

Copy | Download

TY  - JOUR
T1  - Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water

AU  - Taotao Sun
AU  - Mian Muhammad Ahson Aslam
AU  - Guangquan Chen
AU  - Yuchen Ye
AU  - Wentao Xu
AU  - Changsheng Peng
Y1  - 2024/08/20
PY  - 2024
N1  - https://doi.org/10.11648/j.earth.20241304.14
DO  - 10.11648/j.earth.20241304.14
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 151
EP  - 162
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20241304.14
AB  - This study investigates the potential of biochar produced via a solar pyrolysis system and its effectiveness in removing copper (Cu2+) ions from water, presenting a sustainable and energy-efficient method for biochar production and biomass recycling. Two common agricultural and livestock wastes, corn straw and cow dung, were used as raw materials to produce biochar. These materials underwent solar pyrolysis under limited oxygen conditions to produce biochar, which was then compared to biochar produced via traditional pyrolysis. The comparison involved elemental analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area and pore size analysis to highlight differences in their physical and chemical properties. Adsorption experiments were conducted to evaluate the adsorptive capacity of biochar for copper ions (Cu2+) from water, determining the optimal pH conditions and underlying adsorption mechanisms. The findings reveal that biochar produced through solar pyrolysis exhibits similar properties and Cu2+ adsorption capacities to those prepared by traditional methods. Specifically, cow dung biochar demonstrated a higher adsorption capacity for Cu2+ compared to corn straw biochar. The Cu2+ adsorption by corn straw biochar followed the Langmuir isothermal adsorption model and pseudo-second-order kinetic equation, whereas cow dung biochar conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic equation. By demonstrating the comparable efficacy of solar pyrolysis biochar in heavy metal adsorption, this study highlights its potential for sustainable environmental remediation and biomass utilization.

VL  - 13
IS  - 4
ER  -

Copy | Download

Author Information

Taotao Sun

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China; Observation and Research Station of Seawater Intrusion and Soil Salinization, Laizhou Bay, Ministry of Natural Resources, Qingdao, China

Contact Email

http://orcid.org/0009-0004-2451-0336
Mian Muhammad Ahson Aslam

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China; Observation and Research Station of Seawater Intrusion and Soil Salinization, Laizhou Bay, Ministry of Natural Resources, Qingdao, China

Contact Email

http://orcid.org/0000-0001-8174-4439
Guangquan Chen

Observation and Research Station of Seawater Intrusion and Soil Salinization, Laizhou Bay, Ministry of Natural Resources, Qingdao, China

Contact Email

http://orcid.org/0000-0002-2531-3092
Yuchen Ye

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China

Contact Email

http://orcid.org/0009-0002-5052-6812
Wentao Xu

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China

Contact Email

http://orcid.org/0009-0001-9544-9921
Changsheng Peng

School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China

Contact Email

http://orcid.org/0000-0002-2429-0634

Download PDF

Sections

Plain Text BibTeX RIS

APA Style

Sun, T., Aslam, M. M. A., Chen, G., Ye, Y., Xu, W., et al. (2024). Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sciences, 13(4), 151-162. https://doi.org/10.11648/j.earth.20241304.14

Copy | Download

ACS Style

Sun, T.; Aslam, M. M. A.; Chen, G.; Ye, Y.; Xu, W., et al. Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sci. 2024, 13(4), 151-162. doi: 10.11648/j.earth.20241304.14

Copy | Download

AMA Style

Sun T, Aslam MMA, Chen G, Ye Y, Xu W, et al. Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water. Earth Sci. 2024;13(4):151-162. doi: 10.11648/j.earth.20241304.14

Copy | Download

@article{10.11648/j.earth.20241304.14,
  author = {Taotao Sun and Mian Muhammad Ahson Aslam and Guangquan Chen and Yuchen Ye and Wentao Xu and Changsheng Peng},
  title = {Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water
},
  journal = {Earth Sciences},
  volume = {13},
  number = {4},
  pages = {151-162},
  doi = {10.11648/j.earth.20241304.14},
  url = {https://doi.org/10.11648/j.earth.20241304.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20241304.14},
  abstract = {This study investigates the potential of biochar produced via a solar pyrolysis system and its effectiveness in removing copper (Cu2+) ions from water, presenting a sustainable and energy-efficient method for biochar production and biomass recycling. Two common agricultural and livestock wastes, corn straw and cow dung, were used as raw materials to produce biochar. These materials underwent solar pyrolysis under limited oxygen conditions to produce biochar, which was then compared to biochar produced via traditional pyrolysis. The comparison involved elemental analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area and pore size analysis to highlight differences in their physical and chemical properties. Adsorption experiments were conducted to evaluate the adsorptive capacity of biochar for copper ions (Cu2+) from water, determining the optimal pH conditions and underlying adsorption mechanisms. The findings reveal that biochar produced through solar pyrolysis exhibits similar properties and Cu2+ adsorption capacities to those prepared by traditional methods. Specifically, cow dung biochar demonstrated a higher adsorption capacity for Cu2+ compared to corn straw biochar. The Cu2+ adsorption by corn straw biochar followed the Langmuir isothermal adsorption model and pseudo-second-order kinetic equation, whereas cow dung biochar conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic equation. By demonstrating the comparable efficacy of solar pyrolysis biochar in heavy metal adsorption, this study highlights its potential for sustainable environmental remediation and biomass utilization.
},
 year = {2024}
}

Copy | Download

TY  - JOUR
T1  - Properties of Biochar Prepared by Solar Pyrolysis and Its Adsorption of Cu2+ in Water

AU  - Taotao Sun
AU  - Mian Muhammad Ahson Aslam
AU  - Guangquan Chen
AU  - Yuchen Ye
AU  - Wentao Xu
AU  - Changsheng Peng
Y1  - 2024/08/20
PY  - 2024
N1  - https://doi.org/10.11648/j.earth.20241304.14
DO  - 10.11648/j.earth.20241304.14
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 151
EP  - 162
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20241304.14
AB  - This study investigates the potential of biochar produced via a solar pyrolysis system and its effectiveness in removing copper (Cu2+) ions from water, presenting a sustainable and energy-efficient method for biochar production and biomass recycling. Two common agricultural and livestock wastes, corn straw and cow dung, were used as raw materials to produce biochar. These materials underwent solar pyrolysis under limited oxygen conditions to produce biochar, which was then compared to biochar produced via traditional pyrolysis. The comparison involved elemental analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area and pore size analysis to highlight differences in their physical and chemical properties. Adsorption experiments were conducted to evaluate the adsorptive capacity of biochar for copper ions (Cu2+) from water, determining the optimal pH conditions and underlying adsorption mechanisms. The findings reveal that biochar produced through solar pyrolysis exhibits similar properties and Cu2+ adsorption capacities to those prepared by traditional methods. Specifically, cow dung biochar demonstrated a higher adsorption capacity for Cu2+ compared to corn straw biochar. The Cu2+ adsorption by corn straw biochar followed the Langmuir isothermal adsorption model and pseudo-second-order kinetic equation, whereas cow dung biochar conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic equation. By demonstrating the comparable efficacy of solar pyrolysis biochar in heavy metal adsorption, this study highlights its potential for sustainable environmental remediation and biomass utilization.

VL  - 13
IS  - 4
ER  -

Copy | Download