Separation of lignin from beech wood hydrolysate using polymeric resins and zeolites – Determination and application of adsorption isotherms

Nitzsche, Roy; Gröngröft, Arne; Kraume, Matthias

doi:10.1016/j.seppur.2018.07.077

Cited by 45 publications

(28 citation statements)

References 36 publications

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“…Regarding the elimination of phenolic compounds from TABH by the resins, it was from 55% to 88%; this result is similar to other values reported in the literature (64-94%) [35][36][37][38]. Using the Dowex 1 × 8 resin at acid pH, the amount of phenolic compounds adsorbed was lower than at pH 7; a comparable result was observed by Martos et al [39].…”

Section: Elimination Of Growth Inhibitory Compounds From Tabhsupporting

confidence: 90%

Tequila Agave Bagasse Hydrolysate for the Production of Polyhydroxybutyrate by Burkholderia sacchari

et al. 2019

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Tequila agave bagasse (TAB) is the fibrous waste from the Tequila production process. It is generated in large amounts and its disposal is an environmental problem. Its use as a source of fermentable sugars for biotechnological processes is of interest; thus, it was investigated for the production of polyhydroxybutyrate (PHB) by the xylose-assimilating bacteria Burkholderia sacchari. First, it was chemically hydrolyzed, yielding 20.6 g·L−1 of reducing sugars, with xylose and glucose as the main components (7:3 ratio). Next, the effect of hydrolysis by-products on B. sacchari growth was evaluated. Phenolic compounds showed the highest toxicity (> 60% of growth inhibition). Then, detoxification methods (resins, activated charcoal, laccases) were tested to remove the growth inhibitory compounds from the TAB hydrolysate (TABH). The highest removal percentage (92%) was achieved using activated charcoal (50 g·L−1, pH 2, 4 h). Finally, detoxified TABH was used as the carbon source for the production of PHB in a two-step batch culture, reaching a biomass production of 11.3 g·L−1 and a PHB accumulation of 24 g PHB g−1 dry cell (after 122 h of culture). The polymer structure resulted in a homopolymer of 3-hydroxybutyric acid. It is concluded that the TAB could be hydrolyzed and valorized as a carbon source for producing PHB.

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Section: Elimination Of Growth Inhibitory Compounds From Tabhsupporting

confidence: 90%

Tequila Agave Bagasse Hydrolysate for the Production of Polyhydroxybutyrate by Burkholderia sacchari

et al. 2019

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“…The value of R L could indicate the shape of isotherm and nature of the adsorption process: favorable isotherm (0 < R L < 1), irreversible isotherm (R L = 0), linear isotherm (R L = 1), and unfavorable isotherm (R L > 1). The closer the R L value is to 0, the more favorable is the adsorption process 49 . In Fig.…”

Section: Effect Of the Initial Concentration Of Pb(ii)mentioning

confidence: 99%

Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

Nuithitikul

Phromrak

Saengngoen

2020

Sci Rep

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In this study, cashew nut shells (CNS), waste from a cashew nut processing factory, have been used as an adsorbent for Pb(II) ions in water. Treatments of CNS with 1 M of H 2 So 4 , HNO 3, and NaOH solutions were performed to modify their surfaces and improve their adsorption capacities. characterization of untreated and chemical-treated CNS was carried out using nitrogen adsorption isotherm, elemental (CHN) analysis, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX). In the study of Pb(II) removal, various models of adsorption kinetics and isotherms were evaluated against the experimental data. the results showed that H 2 So 4-treated cnS exhibited the highest adsorption capacity. the chemical treatment removes impurities, alters the surface functional groups and improves specific surface areas and pore volumes of native CNS significantly. Surface adsorption and intra-particle diffusion steps were found to substantially affect the overall adsorption process of Pb(II) on H 2 So 4-treated cnS. owing to its easy preparation and comparable adsorption capacity, H 2 So 4-treated cnS has the potential to be developed as a low-cost adsorbent for the removal of pb(ii) from contaminated water. Water is a natural resource necessary for living and sustaining our ecosystem. The increases in human population and industrial processes have released more polluted water into the environment unless proper treatments are implemented effectively. Owing to the water solubility of heavy metals under favorable pH/Eh conditions, water is inevitably contaminated with heavy metals, mostly discharged from several industries 1. Such contaminated water leads to environmental problems and accumulation of heavy metals in the food chain which finally returns to human beings. Numerous disorders and diseases are caused by the deposition of heavy metals. Ions of lead, mercury, cadmium and chromium have been reported to be at the top of the toxicity list 2. Lead (Pb) ions contaminated in water are highly toxic to humans and the environment. The sources of lead include the steel and metal alloy industries, welding and electroplating processes, and manufactures of batteries, pigments and ammunition 2-4. The accumulation of lead in the human body at a certain level can seriously destroy the nervous system, organs (i.e., heart, kidneys, and reproductive system) and tissues 5,6. The World Health Organization specifies the maximum concentration of lead ions in drinking water as 0.01 mg/L 7. Several methods have been introduced to remove heavy metal ions from contaminated water such as chemical precipitation, membrane filtration, ion-exchange, electrochemical methods, flotation, and adsorption. Many methods have drawbacks which are high capital and operating costs, the requirement of extra chemicals and high energy, generation of hazardous sludge, and low performance for diluted wastewater 8. Among these methods, adsorption is very attractive owing to its easy operat...

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“…Among all of them, adsorption is considered a highly effective and suitable process for the removal of phenols from industrial effluents [6] due to its simple design, user-friendliness, low operation and maintenance cost, and high remediation performance [7]. In the last decades, various adsorbents, such as carbon materials [8,9], clays [10], polymers [11], and silica [12], have been investigated for their adsorption of phenolic contaminants. However, due to its high production cost, low adsorption capability for different pollutants, limitation in industrial effluents' pH range, and low reusability, increasing interest has focused on developing new sustainable and eco-economical hybrid adsorbents that exhib a high removal and excellent reusability performance for various pollutants.Activated carbon (AC) is a widely used adsorbent for the remediation of contaminated organic wastewater due to its excellent surface characteristics (surface area and porous structure) and abundant oxygen functionalities [6,13].…”

mentioning

confidence: 99%

Sewage Sludge ZnCl2-Activated Carbon Intercalated MgFe–LDH Nanocomposites: Insight of the Sorption Mechanism of Improved Removal of Phenol from Water

Mu’azu

Zubair

Jarrah

et al. 2020

IJMS

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This work reports the synthesis of new layered double hydroxide (LDH) composites using sewage-based ZnCl2-activated carbon (AC) intercalated with MgFe (AC-MgFe-LDH) and an evaluation of their adsorptive performance for phenol removal from water. The effect of the AC loading on the final properties of synthesized composites was investigated via various characterization techniques. The results showed efficient decoration at 0.1–0.25 g AC loading within the layers of AC–MgFe composites LDH, which was reflected in the higher surface area (233.75 m2/g) and surface functionalities (OH, NO3, C-O-C, and MMO) yielding a significant improvement of the phenol removal efficiency. However, at higher contents, AC loading led to the breakage of the LDH structure and agglomeration, as indicated by the deterioration in the textural and structural properties. The isotherm and kinetic data were well fitted by the Langmuir and pseudo-second-order model, respectively, with a maximum obtained monolayer adsorption capacity of 138.69 mg/g. The thermodynamics results demonstrated that phenol adsorption is an endothermic process. The sorption mechanism of phenol molecules on the AC–MgFe composite was governed by chemical bonding with OH, C=O, and MMO groups and pore diffusion via π–π interactions. Superior phenol removal with excellent recyclability up to five cycles of the new AC–MgFe composite suggested its use as a potential adsorbent for effective phenol removal from water and wastewater streams.

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Separation of lignin from beech wood hydrolysate using polymeric resins and zeolites – Determination and application of adsorption isotherms

Cited by 45 publications

References 36 publications

Tequila Agave Bagasse Hydrolysate for the Production of Polyhydroxybutyrate by Burkholderia sacchari

Tequila Agave Bagasse Hydrolysate for the Production of Polyhydroxybutyrate by Burkholderia sacchari

Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

Sewage Sludge ZnCl2-Activated Carbon Intercalated MgFe–LDH Nanocomposites: Insight of the Sorption Mechanism of Improved Removal of Phenol from Water

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