Preparation of Chitosan Beads for the Adsorption of Reactive Blue 4 from Aqueous Solutions

Vakili, Mohammadtaghi; Rafatullah, Mohd; Ibrahim, Mahamad Hakimi; Abdullah, Anas; Salamatinia, Babak; Gholami, Zahra

doi:10.5829/idosi.ijee.2016.07.02.06

Cited by 3 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Luego, a la mezcla se incorporan las nanopartículas magnéticas. Posteriormente, la mezcla en gel es liberada por medio de goteo en una solución de NaOH con agitación constante hasta que se formen las perlas (Vakili et al, 2016). Por último, se remueve la solución residual de NaOH, las perlas son lavadas hasta pH neutro y secadas hasta masa constante.…”

Section: Producción Y Modificación Del Bioadsorbente De Quitosanounclassified

Simulación de procesos y evaluación ambiental de la producción de un bioadsorbente modificado con quelantes y nanopartículas magnéticas

Bertel Pérez,

Cogollo Cárcamo,

González Delgado

2023

reveia

View full text Add to dashboard Cite

Las estrategias de valorización de residuos son clave para lograr una producción más sostenible dentro de la industria de mariscos. El quitosano es un biopolímero que cuenta con múltiples aplicaciones en sectores como agricultura, la industria alimentaria, cosmética, sistemas detratamiento de agua, entre otros. Los residuos de la industria de los mariscos pueden ser aprovechados en la síntesis de quitosano, convirtiéndose en una alternativa de valorización de residuos. Uno de los usos alternativos del quitosano es como precursor para la preparación de bioadsorbentes modificados con el fin de eliminar contaminantes. En este trabajo, se desarrolló la evaluación ambiental del proceso de obtención a escala industrial de un bioadsorbente de quitosano funcionalizado con nanopartículas de magnetita y un quelante (tiourea), con el objetivo de evaluar los posibles impactos ambientales. Se utilizó el software Aspen Plus ® para la simulación del proceso, que permite la cuantificación de flujos másicos y estimación de propiedades. El análisis ambiental se realizó utilizando el Algoritmo de Reducción de Residuos (WAR) a través del software WAR GUI. Los resultados mostraron que el proceso consume impactos ambientales potenciales (PEI), obteniendo un valor positivo de 1.870 PEI/h. Las categorías relacionadas con los impactos toxicológicos (HTPI, HTPE, TTP y ATP) presentaron menores valores que las relacionadas con impactos atmosféricos (GWP, ODP, PCOP y AP), siendo las de mayor contribución toxicidad humana por ingestión (HTPI) y la toxicidad potencial terrestre (TTP), categorías que se encuentran asociadas a la dosis letal media (LD50) de los compuestos involucrados en el proceso. Se determinó consumo de PEI usando como fuente energética gas natural.

show abstract

Section: Producción Y Modificación Del Bioadsorbente De Quitosanounclassified

Simulación de procesos y evaluación ambiental de la producción de un bioadsorbente modificado con quelantes y nanopartículas magnéticas

Bertel Pérez,

Cogollo Cárcamo,

González Delgado

2023

reveia

View full text Add to dashboard Cite

show abstract

“…The substances to be impregnated are added to the gel, and the gel mixture is then dripped into a sodium hydroxide solution. This dripping process induces a liquid phase separation between acetic acid and NaOH, resulting in the formation of beads [34]. Subsequently, the beads go through a washing system where they are brought to a neutral pH, and finally, they are dried to reduce their water content…”

Section: Production Of the Modified Chitosan Bioadsorbentsmentioning

confidence: 99%

Mass-Integration and Environmental Evaluation of Chitosan Microbeads Production Modified with of Thiourea and Magnetite Nanoparticles

González-Delgado,

Cogollo-Cárcamo,

Bertel-Pérez

2023

Processes

View full text Add to dashboard Cite

Bioadsorbents based on biopolymers modified with magnetic nanoparticles stand out for being non-toxic, effective, and easy to recover. Thus, the objective of the present work was to carry out a computer-aided environmental evaluation of the industrial-scale production of bioadsorbents from chitosan modified with iron nanoparticles and functionalized with thiourea as a chelating agent plus mass integration. The plant simulation was carried out in Aspen Plus, and for the mass integration of the process, a pinch analysis was used to determine the minimum target fresh and residual water amount, assuming two process stages: (1) the synthesis of magnetite nanoparticles, and (2) the production of chitosan-based bioadsorbents. The environmental assessment was performed using the waste reduction algorithm (WAR). The potential environmental impact (PEI) was quantified, taking into account the impact of the products and energy, obtaining a value below zero of −0.78 PEI/kg of the product. The photochemical oxidation potential (PCOP) stood out as the category with the greatest impact, mainly related to the use of ethanol during washing. The categories related to toxicological impacts (HTPI, HTPE, TTP, and ATP) had lower values than those related to atmospheric impacts (GWP, ODP, PCOP, and AP). The mass integration of the process resulted in fewer impacts in the HTPE category, as a consequence of the decrease in NaOH in the residual streams and the release of 0.297 PEI/kg of product in the ATP category caused by the presence of Al(OH)₃. It can be concluded that the mass integration managed to reduce up to 51% of the freshwater used in the processes, and it is a useful tool, as it slightly decreased the total potential impacts.

show abstract

“…Adsorption is one of the commonly used methods for the removal of pollutants due to easy application and economical saving potential. There are many adsorbents in use such as sawdust [4], rice husk [15], wood charcoal [16], wheat husk [17], chitosan beads [18,19], red mud [20], bagasse fly ash [21], and peat and bentonite [22]. Activated carbon due to its high adsorption capacity and fast adsorption kinetics is used as an adsorbent to remove a wide range of contaminants from various matrices [23].…”

Section: Introductionmentioning

confidence: 99%

Synergy of Granular Activated Carbon and Anaerobic Mixed Culture in Phenol Bioremediation of Aqueous Solution

Salehi

Kebria

2020

IJEE

View full text Add to dashboard Cite

The present study focused on the synergistic effects bioremediation of phenol in aqueous solution using combination of anaerobic mixed culture and Granular Activated Carbon (GAC) as a biological GAC (BGAC). Meanwhile, the effect of contact time and various phenol concentrations on adsorption and biosorption process investigated. The phenol concentration was analyzed using UV/Vis spectrophotometer. The morphology and structure of two adsorbents (GAC and BGAC) were characterized by FESEM and BET specific surface area analysis. The batch experiments using mixed bacterial culture, isolated from wood and paper factory wastewater, were adapted to high concentrations of phenol and employed in order to evaluate the tolerance and biosorption capability of microorganisms for phenol biodegradation. The synergetic effect of phenol removal using combination of GAC with an anaerobic biofilm indicated that the removal efficiency for concentration of 700, 800, and 1000 mg/l at initial stages increased to 4, 10, and 12%, respectively and while by increment of the retention time did not shown significant impact on the removal efficiency. These results conducted both desorption of adsorbates due to biotransformation in the aqueous solution and direct assimilation of adsorbates on GAC by the microorganism's biofilm. The adsorption data were fitted with pseudo-first-order and pseudosecond-order models and it was found that the pseudo-second-order model explains the adsorption kinetics more efficiently. The compatibility of the Freundlich and Langmuir adsorption models to equilibrium data were investigated. In fact, the Langmuir isotherm was found to be the best fitting isotherm.

show abstract

Preparation of Chitosan Beads for the Adsorption of Reactive Blue 4 from Aqueous Solutions

Cited by 3 publications

References 16 publications

Simulación de procesos y evaluación ambiental de la producción de un bioadsorbente modificado con quelantes y nanopartículas magnéticas

Simulación de procesos y evaluación ambiental de la producción de un bioadsorbente modificado con quelantes y nanopartículas magnéticas

Mass-Integration and Environmental Evaluation of Chitosan Microbeads Production Modified with of Thiourea and Magnetite Nanoparticles

Synergy of Granular Activated Carbon and Anaerobic Mixed Culture in Phenol Bioremediation of Aqueous Solution

Contact Info

Product

Resources

About