Lignin Removal by Adsorption to Fly Ash in Wastewater Generated by Mechanical Pulping

Andersson, Kerstin I.; Eriksson, Marie; Norgren, Magnus

doi:10.1021/ie202462z

Cited by 28 publications

(13 citation statements)

References 17 publications

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“…After settling, the supernatant was withdrawn from the beaker. Lignin residue was quantified by the UV absorbance of the sample at λ = 280 nm (Andersson et al 2012), as measured with a UV-vis spectrophotometer (HACH DR 6000). The color appearance was measured using an ADMI method (method 10048).…”

Section: Coagulation-flocculation Testmentioning

confidence: 99%

Applicability of Iron (III) Trimesic (Fe-BTC) to Enhance Lignin Separation from Pulp and Paper Wastewater

Pangkumhang¹,

Jutaporn²,

Sorachoti³

et al. 2019

JSM

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This study assesses the application of iron (III) trimesic (Fe-BTC) as a coagulant-flocculant to remove lignin from pulp and paper (P&P) wastewater. In this research, Fe-BTC was characterized by X-ray diffraction (XRD), while the functional groups of Fe-BTC and lignin were analyzed by Fourier transform infrared (FT-IR) spectroscopy. Scanning electron microscopy (SEM) determined the surface morphology of the material. The influential parameters affecting lignin removal included the initial lignin concentration, the quantity of Fe-BTC, and the pH which were investigated using a single batch mixing system. The experimental and optimum operational conditions were determined using Box-Behnken design (BBD). Fe-BTC dosage plays a major role in efficiently removing lignin, while the pH and initial lignin concentration had no significant effect. Greater than 80% removal efficiency could be achieved with a Fe-BTC dosage as low as 2 g/L. The proposed mechanism of lignin aggregation was that Fe molecules were released from unsaturated sites of Fe-BTC and then formed new bonds with O in the methoxy lignin group. The interaction between Fe-BTC and lignin was π-π stacking (benzene ring), which explains the formation of F-O bonds in the lignin sludge. ABSTRAK Kajian ini menilai penggunaan besi (III) trimesik (Fe-BTC) sebagai bahan penggumpal untuk menyingkirkan lignin daripada air sisa pulpa dan kertas (P&P). Dalam kajian ini, Fe-BTC dicirikan oleh pembelauan sinar-x (XRD) manakala kumpulan fungsian Fe-BTC dan lignin dianalisis melalui spektroskopi transformasi Fourier inframerah (FT-IR). MikroskopElektron Imbasan (SEM) menentukan morfologi permukaan untuk bahan. Parameter penting yang menyebabkan penyingkiran lignin adalah termasuk kepekatan pemula lignin, kuantiti Fe-BTC dan pH yang dikaji menggunakan sistem campuran kelompok tunggal. Syarat uji kaji dan pengoperasian optimum telah ditentukan dengan menggunakan reka bentuk Box-Behnken (BBD). Dos Fe-BTC memainkan peranan penting dalam menyingkirkan lignin dengan cekap, manakala pH dan kepekatan pemula lignin tidak menunjukkan kesan yang ketara. Lebih daripada 80% kecekapan penyingkiran boleh dicapai dengan dos Fe-BTC serendah 2 g/L. Mekanisme cadangan daripada pengagregatan lignin adalah bahawa Fe molekul dibebaskan dari unsatured tapak Fe-BTC dan kemudian membentuk ikatan baharu dengan O dalam kumpulan lignin metoksi. Interaksi antara Fe-BTC dan lignin ialah susunan π-π (gelang benzena) yang menjelaskan pembentukan ikatan F-O dalam enap-cemar lignin.Kata kunci: Fe-BTC; lignin; MOFs; pulpa dan kertas; rangka kerja logam-organik; reka bentuk Box-Behnken

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Section: Coagulation-flocculation Testmentioning

confidence: 99%

Applicability of Iron (III) Trimesic (Fe-BTC) to Enhance Lignin Separation from Pulp and Paper Wastewater

Pangkumhang¹,

Jutaporn²,

Sorachoti³

et al. 2019

JSM

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“…It was claimed that lignocelluloses and organic materials contribute to the COD of wastewater . As stated earlier, SL contained other organic materials (e.g.…”

Section: Resultsmentioning

confidence: 87%

“…Previous studies reported that the extraction of lignocelluloses from SLs would significantly reduce the chemical oxygen demand (COD) and turbidity of lignocellulosic wastewater effluents . The application of lignocelluloses extracted from SL as an energy source, fillers, flocculants, composites and resins were reported in the past.…”

Section: Introductionmentioning

confidence: 99%

PDADMAC as a flocculant for lignosulfonate of NSSC pulping process

Oveissi

Sitter

Fatehi

2016

Biotechnology Progress

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The spent liquor (SL) of neutral sulfite semi-chemical (NSSC) pulping process contains about 8 wt% lignocelluloses that can be extracted and used in the production of value-added materials. In this work, a flocculation process followed by centrifugation was considered for isolating lignosulfonate and hemicelluloses from SL. It was observed that, by adding 20 mg/g of polydiallyldimethylammuniom chloride (PDADMAC) with 100,000-200,000 g/mol molecular weight to SL, 45% of lignosulfonate and 39% of hemicelluloses were removed at 30°C. The lignocellulose removal was more efficient for the dual flocculation system of low and high molecular weights PDADMAC than for individual PDADMAC systems. Overall, 49% of lignosulfonate, 47% of hemicelluloses and 97% of turbidity were removed from SL from the dual system when 10 mg/g low molecular weight PDADMAC and 10 mg/g high molecular weight PDADMAC were added to the SL at 30°C, subsequently. The thermogravimetric analysis (TGA) of generated flocs showed that all samples had similar thermal behaviour and 13-16 wt% of flocs remained as ash after burning at 700°C in nitrogen. As the flocs are made of lignocellulosic materials and they are thermally stable, they could be used as fillers in paper board production. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:686-691, 2016.

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“…[43] Andersson et al reported that the predominant metals in a wood fly ash consisted mainly of calcium, potassium, manganese, and magnesium. [44] In another study, fly ash from wood combustion had significantly higher sodium, potassium, calcium, magnesium, and phosphorous contents than did coal fly ash. [6] The density of FA1 and FA2 fractions are given in Table 4.…”

Section: Resultsmentioning

confidence: 99%

“…Preliminary tests showed than fly ash fraction with a particle size larger than 2 mm was ineffective in adsorbing organics, and thus was excluded from this study. [44] In another study, fly ash from wood combustion had significantly higher sodium, potassium, calcium, magnesium, and phosphorous contents than did coal fly ash. [11] Table 3 lists various elements present in the biomass fly ash fractions of FA1 and FA2.…”

Section: Characterization Of Tmp Pressate and Biomass Fly Ash Samplesmentioning

confidence: 99%

Adsorption optimization of a biomass‐based fly ash for treating thermomechanical pulping (TMP) pressate using definitive screening design (DSD)

Cave

Fatehi

2018

Can J Chem Eng

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Wood chips are pretreated with steam or hot water prior to refining in a thermomechanical pulping (TMP) process. Currently, the resultant effluent (i.e., TMP pressate) must be treated in the wastewater treatment facility of the mill. Biomass fly ash is also generated in pulp mills as a residue from burning wood and other biomass in boilers. Fly ash utilization is currently limited and most of it is landfilled worldwide. In this study, biomass fly ash is used as an adsorbent for removing lignocelluloses from a TMP pressate. Biomass fly ash samples were fractionated, and the results showed that their carbon content decreased, but their metal content increased, as the particle size of the fly ash decreased. The main factors impacting the chemical oxygen demand (COD) and lignin concentration of a TMP pressate via treating with biomass fly ash samples (FA1 and FA2) were determined. Model equations and optimum conditions for these reductions were developed using definitive screening design (DSD). Generally, FA1 was considered a more effective adsorbent than FA2. The maximum COD removal from a TMP pressate (91.3 %) was achieved by using FA1 with a particle size of 0.43 mm at a dosage of 70 mg/g FA1/TMP pressate and a treatment time of 2 h. The maximum lignin removal from the TMP pressate (95 %) was obtained by using FA1 with a particle size of 0.11 mm at a dosage of 46.5 mg/g FA1/TMP pressate.

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Lignin Removal by Adsorption to Fly Ash in Wastewater Generated by Mechanical Pulping

Cited by 28 publications

References 17 publications

Applicability of Iron (III) Trimesic (Fe-BTC) to Enhance Lignin Separation from Pulp and Paper Wastewater

Applicability of Iron (III) Trimesic (Fe-BTC) to Enhance Lignin Separation from Pulp and Paper Wastewater

PDADMAC as a flocculant for lignosulfonate of NSSC pulping process

Adsorption optimization of a biomass‐based fly ash for treating thermomechanical pulping (TMP) pressate using definitive screening design (DSD)

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