Adsorptive removal of Congo red by surfactant modified cellulose nanocrystals: a kinetic, equilibrium, and mechanistic investigation

Ranjbar, Damoon; Raeiszadeh, Milad; Lewis, Lev; MacLachlan, Mark J.; Hatzikiriakos, Savvas G.

doi:10.1007/s10570-020-03021-z

Cited by 57 publications

(29 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption of CR to lignin adsorbents might be due to interactions like hydrogen bonding between the carboxylic and hydroxyl groups of lignin and the sulfonic groups of CR [ 51 ], as well as some extent of physical adsorption [ 52 ]. The greater adsorption capacity of enzymatic hydrolysis residue (EHR) towards Congo red was likely because the presence of residual cellulose, which possessed electrostatic attraction, hydrogen bonding and hydrophobic interactions with CR [ 53 ]. Results indicated that lignin recovered from acidic organosolv pretreatment assisted by proper additive (e.g., 2-naphthol-7-sulfonate) and subsequent enzymatic hydrolysis were favorable adsorbents for textile dye removal from wastewater.…”

Section: Resultsmentioning

confidence: 99%

Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization

Chu

Tong

Chen

et al. 2021

Biotechnol Biofuels

View full text Add to dashboard Cite

Background Ethanol organosolv (EOS) pretreatment is one of the most efficient methods for boosting biomass saccharification as it can achieve an efficient fractionation of three major constituents in lignocellulose. However, lignin repolymerization often occurs in acid EOS pretreatment, which impairs subsequent enzymatic hydrolysis. This study investigated acid EOS pretreatment assisted by carbocation scavenger (2-naphthol, 2-naphthol-7-sulfonate, mannitol and syringic acid) to improve biomass fractionation, coproduction of fermentable sugars and lignin adsorbents. In addition, surface barrier effect of lignin on cellulose hydrolysis was isolated from unproductive binding effect of lignin, and the analyses of surface chemistry, surface morphology and surface area were carried out to reveal the lignin inhibition mitigating effect of various additives. Results Four different additives all helped mitigate lignin inhibition on cellulose hydrolysis in particular diminishing surface barrier effect, among which 2-naphthol-7-sulfonate showed the best performance in improving pretreatment efficacy, while mannitol and syringic acid could serve as novel green additives. Through the addition of 2-naphthol-7-sulfonate, selective lignin removal was increased up to 76%, while cellulose hydrolysis yield was improved by 85%. As a result, 35.78 kg cellulose and 16.63 kg hemicellulose from 100 kg poplar could be released and recovered as fermentable sugars, corresponding to a sugar yield of 78%. Moreover, 22.56 kg ethanol organosolv lignin and 17.53 kg enzymatic hydrolysis residue could be recovered as lignin adsorbents for textile dye removal, with the adsorption capacities of 45.87 and 103.09 mg g−1, respectively. Conclusions Results in this work indicated proper additives could give rise to the form of less repolymerized surface lignin, which would decrease the unproductive binding of cellulase enzymes to surface lignin. Besides, the supplementation of additives (NS, MT and SA) resulted in a simultaneously increased surface area and decreased lignin coverage. All these factors contributed to the diminished surface barrier effect of lignin, thereby improving the ease of enzymatic hydrolysis of cellulose. The biorefinery process based on acidic EOS pretreatment assisted by carbocation scavenger was proved to enable the coproduction of fermentable sugars and lignin adsorbents, allowing the holistic utilization of lignocellulosic biomass for a sustainable biorefinery. Graphic abstract

show abstract

Section: Resultsmentioning

confidence: 99%

Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization

Chu

Tong

Chen

et al. 2021

Biotechnol Biofuels

View full text Add to dashboard Cite

show abstract

“…The primary method for preparing CNCs is acid hydrolysis, which cleaves the cellulose fibers transversely. [ 121‐128 ] At present, sulfuric acid (64%) is the common solution for acid hydrolysis, but such high concentrations of sulfuric acid are damaging the environment. Therefore, some new methods, such as enzymatic hydrolysis, oxidization, as well as the ionic liquid hydrolysis are also implemented to prepare CNCs in the context of environmental protection.…”

Section: Preparation Of Mofs Cellulose Derivatives and Mof@cellulose Hybridsmentioning

confidence: 99%

Recent Progress in Metal‐Organic Frameworks@Cellulose Hybrids and Their Applications

et al. 2021

View full text Add to dashboard Cite

In recent years, metal‐organic frameworks (MOFs) are attracting increasing attention due to their charming properties. However, the intrinsic fragility, powdered crystalline state, and poor processibility of MOFs hinder their further application. By this, the designs of MOF‐based aerogels, hydrogels, membranes are effective ways to solve this problem. Graphene, silica, synthetic polymer and cellulose are the commonly used raw materials for fabricating MOF‐based aerogels, hydrogels, and membranes. Among them, cellulose and its derivatives are the best candidates to support the powdered MOFs from the perspectives of economy, environmental protection and property. This review focuses on discussing the advantages of MOF@cellulose hybrids in applications such as water treatment, antibacterial, gas separation and adsorption, energy storage, drug delivery, catalysis, and other smart composites. MOF@cellulose‐based aerogels, hydrogels and membranes can provide valuable guidance for investigating the practical application of MOFs in terms of processability, reusability, stability and easiness in handling.

show abstract

“…The parameter k f exhibited MWHC>WHC>WH behavior, thus intuiting that the active centers of MWHC are more dye-affine than those of WH and WHC. This, due to the protonation of the MWHC surface after modification (Ranjbar et al, 2020). The values of the Freundlich constant n are in the range 1-10, therefore the chemical bonds formed between the anions and the active centers are strong, decreasing the possibility of desorption (Mondal & Kar, 2018); this could be due to the importance in the formation of multilayers during adsorption [66].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis of adsorbents from wheat hulls, extracted cellulose and modified with Cetyl trimethyl ammonium chloride to remove Congo Red in aqueous solution

Villabona-Ortíz

Ortega‐Toro

Aguilar-Bermúdez

et al. 2021

RMIQ

View full text Add to dashboard Cite

Adsorptive removal of Congo red by surfactant modified cellulose nanocrystals: a kinetic, equilibrium, and mechanistic investigation

Cited by 57 publications

References 61 publications

Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization

Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization

Recent Progress in Metal‐Organic Frameworks@Cellulose Hybrids and Their Applications

Synthesis of adsorbents from wheat hulls, extracted cellulose and modified with Cetyl trimethyl ammonium chloride to remove Congo Red in aqueous solution

Contact Info

Product

Resources

About