Single and competitive adsorption of Cd(II) and Pb(II) ions from aqueous solutions onto industrial chili seeds (C apsicum annuum ) waste

Castillo, Nahúm Andrés Medellín; Padilla-Ortega, Érika; Regules-Martínez, María C.; Leyva‐Ramos, Roberto; Ocampo-Pérez, Raúl; Álvarez, Candy Carranza

doi:10.1016/j.serj.2017.01.004

Cited by 58 publications

(25 citation statements)

References 27 publications

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“…Phenol adsorption with increasing aqueous concentration did not increase as sharply for spruce bark ACs as for pine bark ACs. The sharp rise of the pine bark curves (Figure 4) indicates a lesser quantity of competing ions for the adsorption sites [30], which is supported by the lower ash concentration of the pine bark ACs. Lower ash content delivers fewer dissolving (alkaline) ions to the solution.…”

Section: Removal Of Organic Contaminantsmentioning

confidence: 72%

Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal

et al. 2020

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The applicability of steam activated pine and spruce bark biochar for storm water and wastewater purification has been investigated. Biochar samples produced from the bark of scots pine (Pinus sylvestrus) and spruce (Picea spp.) by conventional slow pyrolysis at 475 °C were steam activated at 800 °C. Steam activation was selected as a relatively inexpensive method for creating porous biochar adsorbents from the bark-containing sidestreams of the wood refining industry. A suite of standard analytical procedures were carried out to quantify the performance of the activated biochar in removing both cations and residual organics from aqueous media. Phenol and microplastics retention and cation exchange capacity were employed as key test parameters. Despite relatively low surface areas (200–600 m2/g), the steam-activated biochars were highly suitable adsorbents for the chemical species tested as well as for microplastics removal. The results indicate that ultra-high porosities are not necessary for satisfactory water purification, supporting the economic feasibility of bio-based adsorbent production.

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Section: Removal Of Organic Contaminantsmentioning

confidence: 72%

Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal

et al. 2020

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“…In the bi-component systems, the removal of Cr(III) and Cd(II) was less than that of CV. Therefore, the CV showed a strong competitive effect in the adsorption of Cr(III) and Cd(II), while the Cr(III) and Cd(II) did not influence the adsorption of CV [52,53].…”

Section: Adsorption Isotherms In a Bi-component Systemmentioning

confidence: 92%

“…The mesh areas determined by each sorbate and to the total metal or dye uptake, respectively, are according to the EL or JS model. The adsorption experimental points in bi-component Cd(II)-CV and Cr(III)-CV systems for FA-H 2 O 2 and the three-dimensional graphical surface plot [52,53] are shown as forecast by the EL model in Figure 11a,b, and the JS model in Figure 11c,d. Furthermore, the forecast of equilibrium data points with the isotherm using the EL and JS models was found to be satisfactory, respectively, for Cd(II)/CV and Cr(III)/CV.…”

Section: Adsorption Isotherms In a Bi-component Systemmentioning

confidence: 99%

“…Furthermore, the forecast of equilibrium data points with the isotherm using the EL and JS models was found to be satisfactory, respectively, for Cd(II)/CV and Cr(III)/CV. These models were calculated as the best fit for bi-component adsorption models based on the EL and JS isotherms for modeling the binary adsorption of Cd(II)/CV and Cr(III)/CV, respectively, from aqueous solutions for FA-H 2 O 2 because it uses the single Langmuir isotherm parameters [52,53]. In this plot, the removal experimental points of Cd(II)/CV and Cr(III)/CV are shown together with the forecast isotherm using the EL and JS isotherms, respectively.…”

Section: Adsorption Isotherms In a Bi-component Systemmentioning

confidence: 99%

“…In this plot, the removal experimental points of Cd(II)/CV and Cr(III)/CV are shown together with the forecast isotherm using the EL and JS isotherms, respectively. Cd(II)/CV and Cr(III)/CV, respectively, from aqueous solutions for FA-H2O2 because it uses the single Langmuir isotherm parameters [52,53]. In this plot, the removal experimental points of Cd(II)/CV and Cr(III)/CV are shown together with the forecast isotherm using the EL and JS isotherms, respectively.…”

Section: Adsorption Isotherms In a Bi-component Systemmentioning

confidence: 99%

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Novel Application of Mineral By-Products Obtained from the Combustion of Bituminous Coal–Fly Ash in Chemical Engineering

2020

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The aim of this work was the chemical modification of mineral by-products obtained from the combustion of bituminous coal (FA) treated with hydrogen peroxide (30%), used as an adsorbent for the removal of Cr(III) and Cd(II) ions and crystal violet (CV) from a mixture of heavy metal and organic dye in a solution containing either Cr(III)–CV or Cd(II)–CV. Fourier transform infrared (FT-IR), thermogravimetric analysis (TG), scanning electron microscopy–energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD) analyses suggested that the mechanism of Cr(III)–CV or Cd(II)–CV sorption onto FA–H2O2 includes ion-exchange and surface adsorption processes. The effect of pH on the adsorption equilibrium was studied. The maximum adsorption was found for pH values of 9. The values of the reduced chi-square test (χ2/degree of freedom (DoF)) and the determination coefficient R2 obtained for the sorbate of the considered isotherms were compared. Studies of equilibrium in a bi-component system by means of the extended Langmuir (EL), extended Langmuir–Freundlich (ELF), and Jain–Snoeyink (JS) models were conducted. The estimation of parameters of sorption isotherms in a bi-component system, either Cr(III)–CV or Cd(II)–CV, showed that the best-fitting calculated values of experimental data for both sorbates were obtained with the JS model (Cr(III) or CV) and the EL model (Cd(II) or CV). The maximum monolayer adsorption capacities of FA–H2O2 were found to be 775, 570 and 433 mg·g−1 for Cr, Cd and CV, respectively. Purification water containing direct Cr(III) or Cd(II) ions and CV was made with 90%, 98% and 80% efficiency, respectively, after 1.5 h. It was found that the chemical enhancement of FA from coal combustion by H2O2 treatment yields an effective and economically feasible material in chemical engineering for the treatment of effluents containing basic dyes and Cr(III) and Cd(II) ions.

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Apple Tree Root‐Derived Biochar/Iron Oxide Triphasic Nanocomposite for Wastewater Treatment and Microwave Absorption

Mahmoodi,

Aslibeiki,

Ghosh

et al. 2024

Advanced Sustainable Systems

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In this work, two major sources of pollution: (1) Water pollution due to heavy metals, and (2) Electromagnetic wave (EMW) pollution, often regarded as the fourth category of pollution (after air, water, and soil pollution) are addressed. A unique bio‐based triphasic nanocomposite (Fe3O4/α‐Fe2O3/carbon) is synthesized and its superior properties are demonstrated to address both types of environmental pollution. The nanocomposite, derived from lightweight apple tree roots, is used for Pb (II) ion removal from aqueous solutions via adsorption and magnetic separation. The biomass‐derived highly porous biochar decorated with iron‐oxide showed adsorption efficiency of nearly 100% and corresponding capacity of 149 mg.g−1 under optimal conditions for initial Pb (II) concentration of 50 mg.L−1. Furthermore, a remarkable adsorption capacity of 731 mg.g−1 is achieved using lower amount of the adsorbent for a slightly lower efficiency (97%). In addition, the mesoporous composite showed excellent EMW absorption efficiency with effective absorption bandwidth of 7.8 GHz and reflection loss of −61.7 dB, arising from very good impedance matching, and high dielectric and magnetic losses. This work establishes the multifunctional properties of the synthesized composite, and addresses the UN Sustainable Development Goal (SDG) 6 (Clean water and sanitation) and SDG 13 (Climate action, including pollution management).

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Single and competitive adsorption of Cd(II) and Pb(II) ions from aqueous solutions onto industrial chili seeds (C apsicum annuum ) waste

Cited by 58 publications

References 27 publications

Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal

Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal

Novel Application of Mineral By-Products Obtained from the Combustion of Bituminous Coal–Fly Ash in Chemical Engineering

Apple Tree Root‐Derived Biochar/Iron Oxide Triphasic Nanocomposite for Wastewater Treatment and Microwave Absorption

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