Malachite green adsorption on Fe3O4@pinecone biochar formed in an attempted CaFe2O4 deposition
Source abstract
Abstract
Highlights • Pinecone biochar (PCBC) made at 500 ºC was impregnated at pH 10.3 by aqueous CaCl2 and FeCl3 coprecipitation, then reheated at 500 ºC gave Fe3O4@PCBC, not CaFe2O4@PCBC. • FTIR, XRD, BET, EA, and SEM-EDS analyses confirmed Fe3O4 predominated on PCBC surfaces. • Supported metal ferrite syntheses in literature not confirmed by elemental and other analyses could be suspect. • The Langmuir isotherm best describes the thermodynamics; pseudo-first order kinetics occurred. • Electrostatic, hydrogen bonding, and van der Waals attractions vs Malachite Green (MG) speciation were studied for MG adsorption (pH 2-9) onto Fe3O4@PCBC. • Adsorption was spontaneous and endothermic (ΔGº278-323 K = -23.7, -27.5, -29.4, -32.2 and ΔHº278-323 K = 28.9 (kJ/mol)) and creates greater disorder (ΔSº278-323 K = 189.1 J/mol•K).
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Iron oxide chemistry and applications · Phosphorus and nutrient management
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (99)
Show source-provided references
1. General overview to understand the adsorption mechanism of textile dyes and heavy metals on the surface of different clay materials10.1016/j.arabjc.2023.105248 ↗
2. Removal of crystal violet dye by adsorption using bentonite – alginate composite10.1016/j.jece.2017.10.057 ↗
3. Textile finishing dyes and their impact on aquatic environs10.1016/j.heliyon.2019.e02711 ↗
4. Treatment of waters and wastewaters containing sulfur dyes: a review10.1016/j.cej.2012.12.102 ↗
5. Synthetic organic dyes as contaminants of the aquatic environment and their implications for ecosystems: a review10.1016/j.scitotenv.2020.137222 ↗
6. Process development for the degradation of textile azo dyes (mono-, di-, poly-) by advanced oxidation process - ozonation: experimental & partial derivative modelling approach10.1016/j.jenvman.2020.110397 ↗
7. Toxicity of malachite green on plants and its phytoremediation: a review
8. Microplastics and organics – a comparative study of sorption of triclosan and malachite green onto polyethylene10.2166/wst.2023.040 ↗
9. The modified pomegranate peel as an economical and highly effective adsorbent for malachite green dye removal from wastewater
10. Efficiency of various recent wastewater dye removal methods: a review10.1016/j.jece.2018.06.060 ↗
11. The gut microbiota: a new perspective on the toxicity of malachite green (MG)10.1007/s00253-019-10214-5 ↗
12. Toxic textile dyes accumulate in wild European eel Anguilla anguilla10.1016/j.chemosphere.2015.08.007 ↗
13. Spectroscopic studies on interaction of Congo red with ferric chloride in aqueous medium for wastewater treatment10.1080/01496395.2014.978474 ↗
14. Adsorption of rhodamine B and methylene blue dyes using waste of seeds of Aleurites Moluccana, a low cost adsorbent10.1016/j.aej.2016.03.017 ↗
15. Concentrate minimization and water recovery enhancement using pellet precipitator in a reverse osmosis process treating textile wastewater10.1016/j.jenvman.2018.05.057 ↗
16. Sonochemical-assisted synthesis of CuO/Cu2O/Cu nanoparticles as efficient photocatalyst for simultaneous degradation of pollutant dyes in rotating packed bed reactor: LED illumination and central composite design optimization10.1016/j.ultsonch.2017.08.007 ↗
17. Heterogeneous Fenton process by natural pyrite for removal of a textile dye from water: effect of parameters and intermediate identification10.1016/j.jtice.2015.06.015 ↗
18. Unraveling biochar surface area on structure and heavy metal removal performances of carbothermal reduced nanoscale zero-valent iron
19. Silver nanoparticles for wastewater management10.3390/molecules28083520 ↗
20. Preparation and highlighted applications of magnetic microparticles and nanoparticles: a review on recent advances10.1007/s00604-016-1928-y ↗
21. Magnetic cobalt and other types of ferrite nanoparticles: synthesis aspects and novel strategies for application in wastewater Treatment (Review)10.3390/app15020857 ↗
22. High adsorption capability and selectivity of ZnO nanoparticles for dye removal10.1016/j.colsurfa.2016.09.059 ↗
23. SnO2 nanoparticle-loaded activated carbon for simultaneous removal of Acid Yellow 41 and Sunset Yellow; derivative spectrophotometric, artificial neural network and optimization approach10.1016/j.saa.2015.06.008 ↗
24. One-step fabrication of a new outstanding rutile TiO2 nanoparticles/anthracite adsorbent: modeling and physicochemical interpretations for malachite green removal10.1016/j.cej.2021.131890 ↗
25. Preferential and enhanced adsorption of different dyes on iron oxide nanoparticles: a comparative study10.1021/jp109258f ↗
26. Adsorption of Safranin-O dye by copper oxide nanoparticles synthesized from Punica granatum leaf extract10.1080/09593330.2021.1914180 ↗
27. Kinetics and thermodynamics of reactive and vat dyes adsorption on MgO nanoparticles10.1016/j.cej.2012.05.071 ↗
28. Eco-friendly synthesis of Al2O3 nanoparticles: comprehensive characterization properties, mechanics, and photocatalytic dye adsorption study10.3390/coatings14070848 ↗
29. Effect of calcination temperature on morphology and phase transformation of MnO2 nanoparticles: a step towards green synthesis for reactive dye adsorption10.1016/j.chemosphere.2021.132472 ↗
30. A comparative study on the malachite green dye adsorption of chemically synthesized and green MgFe2O4 nanoparticles using gerbera floral waste extract10.1007/s11356-023-29779-w ↗
31. Enhanced cationic/anionic dyes removal in wastewater by green nanocomposites synthesized from acid-modified biomass and CuFe2O4 nanoparticles: mechanism, Taguchi optimization and toxicity evaluation
32. Synthesis of NiFe2O4 nanoparticles for removal of anionic dyes from aqueous solution10.1080/19443994.2015.1050701 ↗
33. MnFe2O4 decorated reduced graphene oxide heterostructures: nanophotocatalyst for methylene blue dye degradation10.1016/j.vacuum.2019.109150 ↗
34. PEG-assisted hydrothermal synthesis of CoFe2O4 nanoparticles with enhanced selective adsorption properties for different dyes10.1016/j.apsusc.2016.08.053 ↗
35. Experimental modelling studies on the removal of dyes and heavy metal ions using ZnFe2O4 nanoparticles10.1038/s41598-022-10036-y ↗
36. Reactive orange 12 dye adsorption onto magnetically separable CaFe2O4 nanoparticles synthesized by simple chemical route: kinetic, isotherm and neural network modeling10.2166/wpt.2021.064 ↗
37. One-pot hydrothermal synthesis of a carbon quantum dot/CaFe2O4 hybrid nanocomposite for carcinogenic Congo red dye degradation10.1039/D3RA00334E ↗
38. Enhancement removal of crystal violet dye using magnetic calcium ferrite nanoparticle: study in single- and binary-solute systems10.1016/j.cherd.2014.10.013 ↗
39. Mohan · 2022
40. Fabrication of engineered biochar-iron oxide from date palm frond for the effective removal of cationic dye from wastewater10.1016/j.jwpe.2023.104046 ↗
41. The potential of biochar-photocatalytic nanocomposites for removal of organic micropollutants from wastewater10.1016/j.scitotenv.2022.154648 ↗
42. Enhanced adsorption of bisphenol A and sulfamethoxazole by a novel magnetic CuZnFe2O4–biochar composite10.1016/j.biortech.2019.02.091 ↗
43. Enhancing cadmium removal efficiency through spinel ferrites modified biochar derived from agricultural waste straw10.1016/j.jece.2022.109027 ↗
44. Manganese ferrite modified biochar from vinasse for enhanced adsorption of levofloxacin: effects and mechanisms10.1016/j.envpol.2020.115968 ↗
45. Solar photodegradation of Rose Bengal in water on the spinel CaFe2O4
46. Enhanced persulfate activated sono-catalytic degradation of brilliant green dye by magnetic CaFe2O4 nanoparticles: degradation pathway study, assessment of bio-toxicity and cost analysis
47. A review on recent advances of biochar from agricultural and forestry wastes: preparation, modification and applications in wastewater treatment
48. A critical review on biochar production from pine wastes, upgradation techniques, environmental sustainability, and challenges10.1016/j.biortech.2023.129632 ↗
49. A critical review on biochar production from pine wastes, upgradation techniques, environmental sustainability, and challenges10.1016/j.biortech.2023.129632 ↗
50. Preparation and characterization of magnetic CaFe2O4 nanoparticles for efficient adsorption of toxic Congo Red dye from aqueous solution: predictive modeling by artificial neural network10.5004/dwt.2017.21361 ↗
51. Facile adsorptive removal of dyes and heavy metals from wastewaters using magnetic nanocomposite of zinc ferrite@reduced graphene oxide10.1016/j.inoche.2022.109912 ↗
52. Manganese ferrite modified agricultural waste-derived biochars for copper ions adsorption10.1016/j.biortech.2022.128303 ↗
53. Synthesis of novel magnesium ferrite (MgFe2O4)/biochar magnetic composites and its adsorption behavior for phosphate in aqueous solutions10.1016/j.biortech.2017.09.035 ↗
54. MgFe2O4 nanoparticles loaded on activated charcoal for effective removal of Cr (VI) – a novel approach10.1016/j.ceramint.2015.08.040 ↗
55. Efficient photocatalytic remediation of persistent organic pollutants using magnetically recoverable spinel manganese ferrite nanoparticles supported on activated carbon10.1016/j.materresbull.2024.112913 ↗
56. Fabrication of magnetic manganese ferrite-loaded sugar cane bagasse/peanut peel biochar adsorbents for the adsorptive removal of phosphorus from aqueous solution10.1038/s41598-025-08753-1 ↗
57. A facile synthesis and study of photocatalytic properties of magnetic CaFe2O4-CeO2 nanocomposites applicable for separation of toxic azo dyes
58. Impact of manganese ferrite (MnFe2O4) nanoparticles on growth and magnetic character of barley (Hordeum vulgare L.)10.1016/j.envpol.2018.08.096 ↗
59. Arsenate adsorption from water using a novel fabricated copper ferrite10.1016/j.cej.2012.06.006 ↗
60. A low-cost magnetic catalyst (MnFe2O4) for ciprofloxacin degradation via periodate activation: the synergistic effect of Mn and Fe10.1016/j.cej.2023.142562 ↗
61. Banana peel-derived biochar-modified Mg ferrite: a magnetically recoverable composite for adsorption-coupled photocatalytic degradation of crystal violet
62. Anhydride functionalised calcium ferrite nanoparticles: a new selective magnetic material for enrichment of lead ions from water and food samples10.1016/j.foodchem.2014.08.046 ↗
63. Size-dependent magnetic properties of calcium ferrite nanoparticles10.1016/j.jmmm.2013.02.016 ↗
64. Synthesis, characterization and in vitro cytotoxicity study of calcium ferrite nanoparticles10.1016/j.mssp.2013.07.016 ↗
65. Synthesis and characterization of metal (Mn,Zn) ferrite magnetic nanoparticles10.1016/j.matpr.2015.06.010 ↗
66. Facile synthesis of CaFe2O4 for visible light driven treatment of polluting palm oil mill effluent: photokinetic and scavenging study10.1016/j.scitotenv.2019.01.195 ↗
67. Influence of pyrolysis temperature and feedstock on carbon fractions of biochar produced from pyrolysis of rice straw, pine wood, pig manure and sewage sludge10.1016/j.chemosphere.2018.11.177 ↗
68. The effect of calcination temperature on the structural and magnetic properties of co-precipitated CoFe2O4 nanoparticles10.1016/j.jallcom.2017.05.048 ↗
69. Aqueous arsenic(V) remediation and redox transformation of arsenic(III) to arsenic(V) using Fe3O4/Douglas fir biochar10.1016/j.jclepro.2024.142254 ↗
70. Sustainable utilization of Fe3O4-modified activated lignite for aqueous phosphate removal and ANN modeling10.1016/j.envres.2024.119618 ↗
71. Linear and nonlinear isotherm, kinetic and thermodynamic behavior of methyl orange adsorption using modulated Al2O3@UiO-66 via acetic acid10.1016/j.jece.2021.106675 ↗
72. The adsorption of gases on plane surfaces of glass, mica and platinum10.1021/ja02242a004 ↗
73. Over the adsorption in solution
74. The survey of application of the linear and nonlinear kinetic models for the adsorption of nickel(II) by modified multi-walled carbon nanotubes10.1007/s13201-019-0978-9 ↗
75. Nonlinear analysis of the kinetics and equilibrium for adsorptive removal of Cd(II) by starch phosphate10.1080/01932691.2011.567179 ↗
76. Preparation of sulfonated carbon-based catalysts from murumuru kernel shell and their performance in the esterification reaction10.1039/D0RA03217D ↗
77. Lychee peels-derived biochar-supported CaFe2O4 magnetic nanocomposite as an excellent adsorbent for effective removal of nitrate and phosphate from wastewater10.1016/j.jece.2023.110991 ↗
78. Magnetic magnetite (Fe3O4) nanoparticle synthesis and applications for lead (Pb2+) and chromium (Cr6+) removal from water10.1016/j.jcis.2015.12.008 ↗
79. A facile synthesis and study of photocatalytic properties of magnetic CaFe2O4-CeO2 nanocomposites applicable for separation of toxic azo dyes
80. Synthesis and characterization of CaFe2O4 nanoparticles via co-precipitation and auto-combustion methods10.1016/j.ceramint.2017.08.203 ↗
81. Synthesis, characterization and thermo-kinetic analysis of sawdust biochar for adsorbent and combustion drives
82. Preparation of pickling-reheating activated alfalfa biochar with high adsorption efficiency for p-nitrophenol: characterization, adsorption behavior, and mechanism10.1007/s11356-019-04862-3 ↗
83. Pinecone biochar for the adsorption of chromium (VI) from wastewater: kinetics, thermodynamics, and adsorbent regeneration10.1016/j.envres.2024.119423 ↗
84. CaFe2O4@SiO2-Cu as a novel and highly efficient nanocatalyst for direct conversion of epoxides to β-acetoxy esters10.1038/s41598-024-77281-1 ↗
85. Teaching precipitation titration methods: a statistical comparison of Mohr, Fajans, and Volhard techniques10.1021/acs.jchemed.4c01037 ↗
86. Do you BET on routine? The reliability of N2 physisorption for the quantitative assessment of biochar’s surface area10.1016/j.cej.2021.129234 ↗
87. Rouquerol · 2013
88. Electromagnetic wave absorption properties of mesoporous Fe3O4/C nanocomposites10.1016/j.compositesb.2015.03.030 ↗
89. The point of zero charge and adsorption properties of natural magnetite10.1007/BF02519745 ↗
90. Exploration of adsorption efficiency and mechanism for malachite green removal by zinc chloride-modified cherry stone biochar: Experiment and density functional theory calculations10.1016/j.jece.2025.120775 ↗
91. Adsorption of malachite green by activated carbon derived from gasified Hevea brasiliensis root, Arab
92. Investigating the adsorption of malachite green and Methyl green onto synthesized Ni0.5Zn0.5Fe2O4 spinel ferrites10.1016/j.jece.2024.113413 ↗
93. Adsorption thermodynamics, kinetics and isosteric heat of adsorption of malachite green onto chemically modified rice husk10.1016/j.desal.2010.07.047 ↗
94. Synthesis of bimetallic Fe–Zn nanoparticles and its application towards adsorptive removal of carcinogenic dye malachite green and Congo red in water10.1016/j.molliq.2015.09.006 ↗
95. Removal of a cationic dye from aqueous solutions by adsorption onto bentonite clay10.1016/j.chemosphere.2005.10.033 ↗
96. Influence of the prepared activated carbon on cellulose acetate for malachite green dye removal from aqueous solution10.1007/s13233-023-00187-w ↗
97. One-pot synthesis of kaolinite–modified pomegranate hydrochar composite for enhanced malachite green removal10.1016/j.jece.2025.119379 ↗
98. Adsorption of malachite green dye from aqueous solutions using mesoporous chitosan–zinc oxide composite material10.1016/j.enceco.2020.07.005 ↗
99. Surface adsorption of malachite green dye from aqueous solution using novel synthesized adsorbent ZnO, Zn1-xFexO and Zn1-xCuxO nanoparticles10.1016/j.dwt.2025.101202 ↗