Physico-Chemical Treatment Influenced by Bacterial Membrane and Impact on Dye Adsorption Capacity

AbstractFenton-like system formed in a natural soil environment deemed to be significant in the aging process of biochar. Aged biochars have distinct physico-chemical and surface properties compared to non-aged biochar. The aged biochar proved to be useful soil amendment due to its improved elements contents and surface properties. The biochar aging process resulted in increased surface area and pore volume, as well as carbon and oxygen-containing functional groups (such as C=O, –COOH, O–C=O etc.) on its surface, which were also associated with the adsorption behavior of 2,4,6-trichlorophenol (2,4,6-TCP). The biochar aging increased the adsorption capacity of 2,4,6-TCP, which was maximum at pH 3.0. The 2,4,6-TCP adsorption capacity of aged-bush biochar (ABB) and aged-peanut shell biochar (APB) was increased by 1.0–11.0% and 7.4–38.8%, respectively compared with bush biochar (BB) and peanut shell biochar (PB) at the same initial concentration of 2,4,6-TCP. All biochars had similar 2,4,6-TCP desorption rates ranging from 33.2 to 73.3% at different sorption temperatures and times. The desorbed components were mainly 2,4,6-TCP and other degraded components, which were low in concentration with small molecule substance. The results indicated that the aged-biochar could be effective for the long-term remediation of naturally organic polluted soils.

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Understanding the mechanisms of cooperative physico-chemical treatment and mechanical disintegration of biomass as a route for enhancing enzyme saccharification

Biomass Conversion and Biorefinery ◽

10.1007/s13399-017-0289-z ◽

2017 ◽

Vol 8 (2) ◽

pp. 293-304

Author(s):

Roger Ibbett ◽

Sanyasi Gaddipati ◽

Greg Tucker

Keyword(s):

Chemical Treatment ◽

Mechanical Disintegration ◽

Physico Chemical ◽

Enzyme Saccharification

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Microwave carbonization of cotton fiber for the production of carbon materials

Perspektivnye Materialy ◽

10.30791/1028-978x-2021-11-54-68 ◽

2021 ◽

Vol 11 ◽

pp. 54-68

Author(s):

E. V. Matveev ◽

◽

A. I. Gajdar ◽

B. A. Lapshinov ◽

A. V. Mamontov ◽

...

Keyword(s):

Adsorption Capacity ◽

Fiber Surface ◽

Thermal Method ◽

Surface Layers ◽

Cotton Lint ◽

Microwave Exposure ◽

Carbonization Process ◽

Fiber Wall ◽

Physico Chemical ◽

Transverse Fractures

This article presents the results of comparative studies of the structural and physico-chemical features of cotton lint samples carbonized by the microwave method and the standard (thermal) method. The dependences of the temperature change of the samples during the microwave carbonization process are obtained. The heterogeneity of the morphology of the fiber surface along the cross-section of the microwave carbonized sample was revealed. It is shown that the structure of the surface layers is characterized by two mechanisms of fiber destruction: numerous brittle transverse fractures and coloring of the fibers in places of swellings (a sharp increase in their diameter) and fluffing of the surface into convoluted fibrils with a transverse size of 50 – 300 nm due to the destruction of the outer layers of the secondary fiber wall. In the central region, the destruction of fibers occurs by the formation of longitudinal interfibrillary slits and the delamination of the secondary fiber wall, which leads to the formation of pores with dimensions of 50 – 200 nm. It is established that during the microwave carbonization process, the central part of the sample is almost completely freed from impurities that are deposited on the fibers of the surface layers. It is shown that the integral adsorption capacity of the microwave carbonized sample is higher than the adsorption capacity of the sample carbonized by the thermal method (126 mg/g and 47 mg/g, respectively). It was found that during microwave exposure more than 10 minutes, regions with an adsorption capacity of ~ 350 – 450 mg/g appear in the carbonized material, that is comparable to the capacity of samples activated by the standard method.

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Combined biological and physico-chemical treatment of filtered pig manure wastewater: pilot investigations

Water Science & Technology ◽

10.2166/wst.2002.0412 ◽

2002 ◽

Vol 45 (12) ◽

pp. 79-87 ◽

Cited By ~ 8

Author(s):

S. Kalyuzhnyi ◽

V. Sklyar ◽

A. Epov ◽

I. Arkhipchenko ◽

I. Barboulina ◽

...

Keyword(s):

Chemical Treatment ◽

Inorganic Nitrogen ◽

Ammonia Removal ◽

Uasb Reactor ◽

Pig Manure ◽

Fluidised Bed ◽

Ambient Temperatures ◽

Effluent Quality ◽

Physico Chemical ◽

Final Effluent

Combined biological and physico-chemical treatment of filtered pig manure wastewater has been investigated on the pilot installation operated under ambient temperatures (15-20°C) and included: i) UASB-reactor for elimination of major part of COD from the filtrate; (ii) stripper of CO2 + fluidised bed crystallisator for phosphate (and partially ammonia) removal from the anaerobic effluents in the form of insoluble minerals - struvite (MgNH4PO4) and hydroxyapatite (Ca5(PO4)3OH); (iii) aerobic-anoxic biofilter for polishing the final effluent (elimination of remaining BOD and nutrients). Under overall hydraulic retention time (HRT) for the system of 7.8 days, the total COD, inorganic nitrogen and total phosphorous removals were 88, 65 and 74%, respectively. A decrease of the overall HRT to 4.25 days led to 91, 37 and 82% removals for total COD, inorganic nitrogen and total phosphorus removals, respectively. The approaches for further improvement of effluent quality are discussed.

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Physico-chemical treatment applied to compost liquor: Feasibility study

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2012.02.016 ◽

2012 ◽

Vol 18 (4) ◽

pp. 1522-1528 ◽

Cited By ~ 8

Author(s):

Jérémy Gagnaire ◽

Laurent Chapon ◽

Philippe Moulin ◽

Benoît Marrot

Keyword(s):

Feasibility Study ◽

Chemical Treatment ◽

Physico Chemical

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Physico-chemical treatment of pulping effluent: Characterization of flocs and sludge generated after treatment

Separation Science and Technology ◽

10.1080/01496395.2017.1292294 ◽

2017 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Kanhaiya Lal ◽

Anurag Garg

Keyword(s):

Chemical Treatment ◽

Physico Chemical

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Study on the adsorption of methylene blue from aqueous solution using hydrogel glucomannan/graphene oxide

Vietnam Journal of Catalysis and Adsorption ◽

10.51316/jca.2021.010 ◽

2021 ◽

Vol 10 (1) ◽

pp. 59-66

Author(s):

Son Le Lam ◽

Phu Nguyen Vinh ◽

Hieu Le Trung ◽

Tan Le Thua ◽

Nhan Dang Thi Thanh ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Graphene Oxide ◽

Adsorption Capacity ◽

Organic Dyes ◽

Dye Adsorption ◽

Order Kinetic ◽

Equilibrium Data ◽

Order Kinetic Model ◽

Pseudo Second Order

Glucomannan/graphene oxide (GM/GO) hydrogel was synthesized by using calcium hydroxide as the crosslinker. The synthesized material was characterized by using IR, XRD, SEM, EDX and RAMAN technology. The composite hydrogel was used for removal of organic dyes from aqueous solution. The results showed that the GM/GO hydrogel had a porous structure and a high adsorption capacity toward methylene blue (MB). The pseudo-second-order kinetic model could fit the rate equation of MB adsorption onto the GM/GO hydrogel. The adsorption of MB onto GM/GO hydrogel was a spontaneous process. In addition, the equilibrium adsorption isotherm data indicated that equilibrium data were fitted to the Langmuir isotherm and the maximum dye adsorption capacity was 198,69 mg.g-1. Moreover, the hydrogel was stable and easily recovered and adsorption capacity was around 97% of the initial saturation adsorption capacity after being used five times.

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Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground

10.20944/preprints201908.0076.v1 ◽

2019 ◽

Author(s):

Lorena Alcaraz ◽

María Esther Escudero ◽

Francisco J. Alguacil ◽

Irene Llorente ◽

Ana Urbieta ◽

...

Keyword(s):

Adsorption Capacity ◽

Activated Carbons ◽

Chemical Study ◽

Bet Surface Area ◽

Maximum Adsorption Capacity ◽

Solution Ph ◽

Microporous Material ◽

Physico Chemical ◽

Spent Coffee Ground ◽

Coffee Ground

This paper describes the physico-chemical study of the adsorption of dysprosium (Dy3+) in aqueous solution onto two types of activated carbons synthesized from spent coffee ground. KOH activated carbon is a microporous material with a specific BET surface area of 2330 m2·g-1 and pores with a diameter of 3.2 nm. Carbon activated with water vapor and N2 is a solid mesoporous, with pores of 5.7 nm in diameter and a specific surface of 982 m2·g-1. A significant dependence of the adsorption capacity on the solution pH was found, while it does not depend significantly neither on the dysprosium concentration nor on the temperature. A maximum adsorption capacity of 31.26 mg·g-1 and 33.52 mg·g-1 for the chemically and physically activated carbons, respectively, were found. In both cases, the results obtained from adsorption isotherms and kinetic study were better fit to a Langmuir model and a pseudo-second-order kinetics. In addition, thermodynamic results indicate that dysprosium adsorption onto both activated carbons is an exothermic, spontaneous and favorable process.

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