Photodegradation of lignin from pulp and paper mill effluent using TiO2/PS composite under UV-LED radiation: Optimization, toxicity assessment and reusability study

Haghighi, Mohsen; Rahmani, Farhad; Kariminejad, Fatemeh; Sene, Rojiar Akbari

doi:10.1016/j.psep.2018.11.020

Cited by 43 publications

(10 citation statements)

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“…Unpaired electrons and oxygen vacancies can be also formed by doping with nonmetallic elements, which improves TiO 2 catalytic performance . Modified TiO 2 materials have been used both for degradation of lignin polymers and for conversion of lignin model compounds . A composite of TiO 2 with lignin‐based carbon was used as a photocatalyst for the conversion of lignin into high‐value chemicals, such as vanillin, 4‐hydroxybenzaldehyde, and benzoic acid .…”

Section: Catalysts For Photocatalytic Lignin Conversionmentioning

confidence: 99%

Photocatalytic Conversion of Lignin into Chemicals and Fuels

et al. 2020

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Lignin, an underutilized component of lignocellulosic biomass, is regarded as a rich reservoir for the production of aromatic chemicals and fuels. Despite extensive research in recent years, lignin's potential is far from being fully unlocked. Photocatalysis that uses sustainable solar energy to drive lignin conversion under mild conditions has been identified as a promising strategy and received growing research interest. This review aims to present a critical introduction to the photocatalytic conversion of lignin, including a summary of lignin conversion pathways and mechanisms, as well as the latest cutting‐edge innovations on photocatalyst design and reactor construction. Moreover, the screening of solvents and regulation of other key factors that are involved in photocatalytic lignin conversion are also elucidated and future perspectives and challenges for photocatalytic conversion of lignin into valuable products are discussed.

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Section: Catalysts For Photocatalytic Lignin Conversionmentioning

confidence: 99%

Photocatalytic Conversion of Lignin into Chemicals and Fuels

et al. 2020

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“…The RSM can be applied as one of the most practical ways for empirical modeling to scrutinize the relationship among empirical and estimated outputs (Haghighi et al 2019). The quadratic form was selected to represent the behavior of COD removal efficiency in range of the independent parameters.…”

Section: Resultsmentioning

confidence: 99%

“…The independent process variables were lignin concentration and based on ANOVA outputs all of parameters were significant. The highest COD removal (89%) was attained by 250 mL/min of flow rate and 50 ppm of lignin concentration after 120 min and with optimal condition of lignin concentration 5.1 ppm, 230 mL/min of volumetric flow rate during 72.5 min, lignin degradation performance was 93.98% (Haghighi et al 2019).…”

Section: Introductionmentioning

confidence: 93%

“…Given the electronic structure of semiconductors, by the photon absorption, afterwards the reaction between h + in valence band (VB) and water leads to produce ( Ȯ H ), which is a power oxidant to degrade a vast number of contaminates (Bahnemann 2004;Seyednezhad et al 2019;Sheikholeslami et al 2019). The use of TiO 2 in photocatalytic process still appears a leading choice due to its cost-effectiveness, nontoxicity, superior redox potentials, easy accessibility, and high photoactivity (Haghighi et al 2019). The mechanism of TiO 2 in photocatalytic phenomena is expressed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally by using 0.625 mM of HOCL as reactive oxidant the treatment efficiency was improved and the COD removal percentage increased up to 93% (Subramonian et al 2017). Haghighi et al (2019) evaluated the application of photodegradation by applying TiO2/PS composite under UV-LED irradiation and using RSM for its optimization. The independent process variables were lignin concentration and based on ANOVA outputs all of parameters were significant.…”

Section: Introductionmentioning

confidence: 99%

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Bach

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The main purpose of this study is to optimize the applicability of TiO 2 nanoparticles for paper mill and pulp wastewater treatment under solar irradiation using response surface methodology, provided by the software package DOE. The principle independent parameters were TiO 2 loading, pH, time and H 2 O 2 concentration, and COD removal efficiency was chosen as desire response. To evaluate the influence of the parameters on the outputs, the quadratic formulation was applied and for determining the validation of developed models analysis of variance was utilized. The results represented the greatest COD removal was achieved 82%, approximately at pH of 8.1, TiO 2 fraction of 0.83 g/L, H 2 O 2 concentration of 2.4 ml/L and the contact time of 196 min.

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Photocatalytic Degradation of Bisphenol A by TiO₂ Mineralized Using a Polystyrene‐Peptide Template

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et al. 2022

ChemistrySelect

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Biomineralization is an environment‐friendly strategy for producing inorganic materials, where nitrogen‐doped particles of controlled size can be synthesized. A peptide‐mediated biomineralization was investigated to produce TiO2 particles with enhanced photocatalytic activity. The heptapeptide, HKKPSKS, verified previously as exhibiting TiO2 mineralizing activity, was immobilized on the surface of functionalized polystyrene (PS) bead through N‐ethyl‐N‐(3‐dimethylamino‐propyl) carbodiimide hydrochloride‐N‐hydroxy‐succinimide (EDC−NHS) coupling, so that it acted as the nucleus to trigger TiO2 precipitation on its surface in ambient condition. During the calcination of PS−peptide−TiO2, the PS−peptide template both allowed the formation of porous‐structured particles, and generated nitrogen‐doped crystalline mixed phase (anatase/rutile) TiO2. More than 86 % of bisphenol A (BPA) was decomposed in the presence of optimally calcined TiO2 under visible light in 2 h, whereas commercial P25 catalyst degraded 48 % of BPA. After five cycles of repeated reactions for BPA degradation, the photocatalytic activity of TiO2 decreased by less than 10 %.

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Photodegradation of lignin from pulp and paper mill effluent using TiO2/PS composite under UV-LED radiation: Optimization, toxicity assessment and reusability study

Cited by 43 publications

References 50 publications

Photocatalytic Conversion of Lignin into Chemicals and Fuels

Photocatalytic Conversion of Lignin into Chemicals and Fuels

Application of TiO2 nanoparticle for solar photocatalytic oxidation system

Photocatalytic Degradation of Bisphenol A by TiO₂ Mineralized Using a Polystyrene‐Peptide Template

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Photodegradation of lignin from pulp and paper mill effluent using TiO2/PS composite under UV-LED radiation: Optimization, toxicity assessment and reusability study

Cited by 43 publications

References 50 publications

Photocatalytic Conversion of Lignin into Chemicals and Fuels

Photocatalytic Conversion of Lignin into Chemicals and Fuels

Application of TiO2 nanoparticle for solar photocatalytic oxidation system

Photocatalytic Degradation of Bisphenol A by TiO2 Mineralized Using a Polystyrene‐Peptide Template

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Product

Resources

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Photocatalytic Degradation of Bisphenol A by TiO₂ Mineralized Using a Polystyrene‐Peptide Template