Basicity Characterization of Imidazolyl Ionic Liquids and Their Application for Biomass Dissolution

Liu, Chao; Li, Youming; Hou, Yi

doi:10.1155/2018/7501659

Cited by 10 publications

(7 citation statements)

References 33 publications

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“…Sodium monochloroacetate (≥ 98%) was purchased from Sigma-Aldrich (Beijing, China). Ionic liquids [EMIM][Ac] were synthesized based on a published method (Liu et al 2018). Other reagents used in the experiment were analytical grade products.…”

Section: Methodsmentioning

confidence: 99%

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Modified lignin nanosphere adsorbent for lead and copper ions

Xie

Hou

2020

BioRes

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Heavy metal ions in wastewater have negative effects on humans and the environment. In this paper, the adsorption of lead and copper ions by modified eucalyptus lignin nanosphere (ECLNPs) was studied. The spherical alkali-lignin particles had a diameter of 50 nm, abundant carboxyl groups of 0.66 mmol/g, and relatively high adsorption performance. The equilibrium adsorption capacities of Pb(II) and Cu(II) by ECLNPs were 126.0 mg/g and 54.4 mg/g, respectively. Both Pb(II) and Cu(II) adsorptive processes fitted a pseudo-second-order kinetics model. In the simultaneous adsorption process of Pb(II) and Cu(II), ECLNPs had higher adsorptive selectivity for Pb(II) than Cu(II), and there was a competitive adsorption process between Pb(II) and Cu(II). This resulted from the lower hydration heat of Pb(II) in water, which leads to easier separation from water ligands. ECLNPs also showed good recyclability, with 16.6% and 21.1% loss in Pb(II) and Cu(II) adsorption capacity, respectively, after three consecutive adsorption-desorption cycles, which provides a feasible technical direction for the utilization of biomass resources and the treatment of water contamination.

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Section: Methodsmentioning

confidence: 99%

“…They have better mass transfer behavior based on improved diffusing and dispersing characteristics (Ge et al 2016). Moreover, lignin nanospheres, prepared using ionic liquid and antisolvent, reduce the water solubility of modified lignin (Liu et al 2018) but increase the chelation between carboxyl groups and ions (Zhao et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Modified lignin nanosphere adsorbent for lead and copper ions

Xie

Hou

2020

BioRes

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“…1-methylimidazole (>99 wt %, Acros, Guangzhou, China), bromoethane (>99 wt %, Aladdin, Guangzhou, China) and ethyl acetate (>99.9 wt%, Aladdin, Guangzhou, China) were used to prepare ionic liquids [EMIM][Ac] in-house according to a procedure available in the literature [21]. Lignin (alkali lignin, ≥99% purity) and sodium monochloroacetate were purchased from Sigma-Aldrich (Beijing, China).…”

Section: Methodsmentioning

confidence: 99%

Preparation of a Novel Lignin Nanosphere Adsorbent for Enhancing Adsorption of Lead

Liu

Hou

2019

Molecules

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Carboxymethyl lignin nanospheres (CLNPs) were synthesized by a two-step method using microwave irradiation and antisolvent. The morphology and structure of CLNPs were characterized by 31P-NMR, FTIR, and SEM, and the results showed that they had an average diameter of 73.9 nm, a surface area of 8.63 m2 or 3.2 times larger than the original lignin, and abundant carboxyl functional groups of 1.8 mmol/g. The influence of dosage, pH, contact time, and concentration on the adsorption of metal ions onto CLNPs were analyzed, and the maximum adsorption capacity of CLNPs for Pb(II) was found to be 333.26 mg/g, which is significantly higher than other lignin-based adsorbents and conventional adsorbents. Adsorption kinetics and isotherms indicated that the adsorption of lead ions in water onto CLNPs followed the pseudo-second-order model based on monolayer chemisorption mechanism. The main chemical interaction between CLNPs and lead ions was chelation. CLNPs also showed an excellent recycling performance, with only 27.0% adsorption capacity loss after 10 consecutive adsorption–desorption cycles.

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“…[25][26][27][28][29][30]. Since these heavy metals are too harmful for sea life and influence human health by causing serious diseases through the nutrition cycle [31][32][33]. Consequently, the heavy metals have high toxicity and they have to be removed before discharging into the aquatic environment.…”

Section: Figurementioning

confidence: 99%

The usage of lignin in two significant applications: As adsorbent surface of water pollutants and antioxidant of plastic polymers: short review

Fadhil¹,

Zageer²,

Faris³

et al. 2021

GSC Adv. Res. Rev.

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Since pollution is very serious problem threating the environmental eco-system around the world, but people do not usually treat this issue properly. Water is contaminated with different type of pollutants such as organic, inorganic, heavy metals, pesticides, dyes, phenols, and many other pollutants. Using adsorption phenomenon is very practical, easy and common method to remove pollutants from water. Owing to the significant properties of lignin such as high surface area, porosity, availability in huge amount, it was chosen to be used as an adsorbent surface of various pollutants. Herein it is going to review some of important literatures regarding that. Another serious problem that is threatening the marine eco-system, human health, and influence the global warming is the huge consumption of plastic polymers every year. Thus, reducing the consumption of plastic polymers is significantly matter. Lignin chemical structures are highly oxygenated and have several aromatic units, so by definition lignin can act as an antioxidant, free radical scavenger and photo-stabilizers. As the chemical structure of monomer moieties to form lignin are highly aromatic so it is suitable to work as UV- blocker to stop the photo-degradation of plastic.

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Basicity Characterization of Imidazolyl Ionic Liquids and Their Application for Biomass Dissolution

Cited by 10 publications

References 33 publications

Modified lignin nanosphere adsorbent for lead and copper ions

Modified lignin nanosphere adsorbent for lead and copper ions

Preparation of a Novel Lignin Nanosphere Adsorbent for Enhancing Adsorption of Lead

The usage of lignin in two significant applications: As adsorbent surface of water pollutants and antioxidant of plastic polymers: short review

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