Enhanced removal of cadmium from wastewater by electro-assisted cementation process: A peculiar Cd reduction on Zn anode

Zhang, Wenjuan; Liu, Xia; Deen, Kashif Mairaj; Asselin, Edouard; Ma, Baozhong; Wang, Chengyan

doi:10.1016/j.cej.2022.139692

Cited by 17 publications

(4 citation statements)

References 41 publications

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“…149 Various thermodynamic parameters such as entropy change (DS°), enthalpy change (DH°), and free energy change (DG°) reveal the feasibility and nature of the adsorption process together with exothermic/endothermic nature. DS°and DH°can be determined by analyzing the intercept and slope of the plot (1/T vs. ln K) by employing eqn (11).…”

Section: Thermodynamic Aspectmentioning

confidence: 99%

“…Thus, numerous methods have been devised for the treatment of water containing various pollutants. These methodologies include flocculation, 10 cementation, 11 coagulation, 12 evaporation, 13 electrocoagulation, 14 ion exchange, 15 membrane filtration, 16 and adsorption. 17 However, these techniques are associated with certain limitations, notably their high cost and the challenge of managing sludge disposal following wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

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Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

Arif

2024

RSC Adv.

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Section: Thermodynamic Aspectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

Arif

2024

RSC Adv.

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“…Excess zinc (Zn) can also lead to adverse health effects, such as stomach cramps, skin irritation, and nausea [3]. Cd and Zn share similar chemical properties and often appear together as water pollutants [4]. Significant concentrations of cadmium and zinc metals have been found in urban stormwater [5].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Ammonia Carbonization of Rice Straw for Hydrochar to Separate Cd(II) and Zn(II) Ions from Aqueous Solution

Wang,

Wei,

Kong

et al. 2023

Polymers

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Hydrochar is considered to be a good adsorbent for the separation of metal ions from aqueous solutions. However, the yield of hydrochar from raw straw is generally low, because the hydrothermal carbonization occurs via dehydration, polymerization, and carbonization. In this work, various hydrochar samples were prepared from rice straw with nitrogen and phosphorus salt; moreover, toilet sewage was used instead of nitrogen, and phosphorus salt and water were used to promote the polymerization and carbonization process. The modified carbon was characterized using XRD, XPS, SEM, and FTIR, and the adsorption capacity was investigated. A significant increase in hydrochar yield was observed when toilet sewage was used as the solvent in the hydrothermal carbonization process. The adsorption capacity of N/P-doped rice straw hydrochar for Cd2+ and Zn2+ metal ions was 1.1–1.4 times higher than that those using the rice straw hydrochar. The Langmuir models and pseudo-second-order models described the metal adsorption processes in both the single and binary-metal systems well. The characterization results showed the contribution of the surface complexation, the electrostatic interaction, the hydrogen bond, and the ion exchange to the extraction of Cd2+ and Zn2+ using N/P-doped rice straw hydrochar.

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“…Por lo tanto, es de gran interés eliminar este contaminante de las aguas residuales. En consecuencia, se han propuesto varios tipos de procesos como posibles alternativas para resolver este problema tales como: la precipitación [6] [7], la coagulación [8], la cementación [9][10], la ultrafiltración [11] [12], la extracción con disolventes [13] [14], fotocatálisis [15], adsorción [16] [17] e intercambio de iones [18] [19]. Sin embargo, la remoción del mercurio sigue siendo un problema debido a la falta de tecnologías efectivas y económicas que minimicen el consumo de energía y reactivos al tiempo que aumenten la selectividad para la remoción del mercurio [20] [21].…”

Section: Introductionunclassified

Adsorción de mercurio sobre nanopartículas de hierro soportadas en fibra de Fique: cinética e isoterma de adsorción

Zea Ramírez,

Bastidas Gómez,

Sierra Ávila

2023

inycomp

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Se estudia la adsorción de iones de mercurio de una solución acuosa sobre un adsorbente (fibra de fique con nanopartículas de hierro). Se estudió el efecto del pH, la concentración inicial de iones de mercurio ([Hg+2]) y la carga de hierro (Fe % peso) en el material adsorbente. De las superficies de respuesta experimentales obtenidos se infiere que en la adsorción de mercurio predomina el mecanismo de quimisorción respecto a la fisisorción. Se utilizaron las isotermas de Langmuir y Freundlich para describir la adsorción física del mercurio; sin embargo, no lograron describir adecuadamente la mayoría de las isotermas experimentales obtenidas. Se estableció que la cinética de adsorción de mercurio en la superficie de la fibra de fique con nanopartículas de hierro se describe mediante un modelo de pseudo-segundo orden que involucra la quimisorción (reacción química) como mecanismo de control de la velocidad, lo que indica que el proceso de adsorción es irreversible. El pH no tiene ningún efecto aparente sobre la adsorción en el rango de pH 4 a 7; sin embargo, para un pH superior a 8, la capacidad de adsorción aumenta a medida que aumenta el valor del pH.

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Enhanced removal of cadmium from wastewater by electro-assisted cementation process: A peculiar Cd reduction on Zn anode

Cited by 17 publications

References 41 publications

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

Hydrothermal Ammonia Carbonization of Rice Straw for Hydrochar to Separate Cd(II) and Zn(II) Ions from Aqueous Solution

Adsorción de mercurio sobre nanopartículas de hierro soportadas en fibra de Fique: cinética e isoterma de adsorción

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