New Lignin-Based Polymers for Ecological Rehabilitation

Shulga, Galia; Betkers, Tālrīts; Brovkina, Jūlija; Neiberte, Brigita; Verovkins, Anrijs; Belous, Olga; Ambrazaitene, Dalia; Žukauskaitė, Audronė

doi:10.1080/15421400801921926

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Chan, 2008). Moreover, Shulga et al (2008) observed that lignosulfonate develops a soil macrostructure that provides an excellent reinforcing effect to the soil matrix for withstanding wind and water erosion of desiccated sandy soils, thereby ensuring relatively long-term stability. Lignosulfonate is a lignin-based polymer compound documented by researchers (e.g.…”

Section: Properties Of Lignosulfonate As An Environmentally Sustainabmentioning

confidence: 99%

Stabilisation of an erodible soil using a chemical admixture

Vinod

Indraratna

Mahamud

2010

Proceedings of the Institution of Civil Engineers - Ground Impr

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Internal erosional behaviour of a lignosulfonate-treated dispersive soil has been studied using apparatus designed and built at University of Wollongong. The effectiveness of lignosulfonate-treated dispersive clay on its erosion resistance has been investigated and its advantages over traditional admixtures (cement) have been presented. Lignosulfonate is a non-toxic admixture that can stabilise certain erodible and dispersive soils effectively, without causing any adverse environmental impact on the ground unlike some traditional stabilisers. Test results show that the erosional parameters such as critical shear stress and coefficient of soil erosion are improved with the increase in the amount of lignosulfonate. Knowledge about the clay particles and lignosulfonate interaction mechanisms is pertinent for long-term environmental sustainability of treated soils, a factor which is poorly understood at microscopic level. Considering this, X-ray diffraction, and Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy were carried out on representative samples to understand the stabilisation mechanism at the particle scale level. The improvement of performance exhibited by the lignosulfonate-treated soil can be mainly attributed to the reduction of the doublelayer thickness by the neutralisation of surface charges of the clay particles and the formation of more stable particle clusters by polymer bridging. Internal erosional behaviour of a lignosulfonate-treated dispersive soil has been studied using apparatus designed and built at University of Wollongong. The effectiveness of lignosulfonate-treated dispersive clay on its erosion resistance has been investigated and its advantages over traditional admixtures (cement) have been presented. Lignosulfonate is a non-toxic admixture that can stabilise certain erodible and dispersive soils effectively, without causing any adverse environmental impact on the ground unlike some traditional stabilisers. Test results show that the erosional parameters such as critical shear stress and coefficient of soil erosion are improved with the increase in the amount of lignosulfonate. Knowledge about the clay particles and lignosulfonate interaction mechanisms is pertinent for long-term environmental sustainability of treated soils, a factor which is poorly understood at microscopic level. Considering this, X-ray diffraction, and Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy were carried out on representative samples to understand the stabilisation mechanism at the particle scale level. The improvement of performance exhibited by the lignosulfonate-treated soil can be mainly attributed to the reduction of the doublelayer thickness by the neutralisation of surface charges of the clay particles and the formation of more stable particle clusters by polymer bridging.the Institution of Civil Engineers Ground Improvement 163 February 2010 Issue GI1 Pages 43

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Section: Properties Of Lignosulfonate As An Environmentally Sustainabmentioning

confidence: 99%

Stabilisation of an erodible soil using a chemical admixture

Vinod

Indraratna

Mahamud

2010

Proceedings of the Institution of Civil Engineers - Ground Impr

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“…Wood pine sawdust -is a wood industry waste (composition, % of absolutely dry wood) cellulose -53.8%; hemicellulose -20.5%; lignin -26.9-28.2%; pentosans -10.7-11.2%; mannan -7.1%; galactan -1.5%; ash -0.2-0.23%; extractives -2.0% [39].…”

Section: Methodsmentioning

confidence: 99%

Specific features of sorption kinetics of heavy metal ions with polysaccharide materials from aqueous media

Никифорова

Natareev

Козлов

2017

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Specific features of sorption kinetics of heavy metal ions with polysaccharide materials from aqueous mediaCharakterystyczne cechy kinetyki sorpcji jonów metali ciężkich z materiałami polisacharydowymi z wodnych środowisk Abstract An investigation of sorption kinetics of heavy metal ions on polysaccharide materials has been performed. Traditionally, kinetic study of ion exchange sorption begins with a determination of the slowest stage of the proces, but the stage of chemical reaction between heavy metal ions and the sorbent functional groups can also make essential contribution. Results of kinetic studies were treated using different kinetic models and, experimental data are described most adequately with pseudo-second order kinetic model. It is determined that polysaccharide materials used in the studies have relatively good kinetic characteristics. Keywords: biomaterials, polymers, adsorption, metals, surfacesStreszczenie Przeprowadzono badania kinetyki sorpcji jonów metali ciężkich na materiałach polisacharydowych. Tradycyjnie badanie kinetyczne sorpcji jonowymiennej rozpoczyna się od określenia najwolniejszego etapu procesu, ale stan reakcji chemicznej pomiędzy jonami metali ciężkich a sorbentowymi grupami funkcyjnymi może mieć również istotny udział. Wyniki badań kinetycznych opisano różnymi modelami kinetycznymi, a najlepsze dopasowanie z danymi eksperymentalnymi uzyskano dla modelu kinetycznego reakcji pseudo drugiego rzędu. Ustalono, że materiały polisacharydowe stosowane w badaniach mają stosunkowo dobre właściwości kinetyczne.

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“…Furthermore, lignin is a precursor of humus substances in soil. Commercial technical lignins are widescale and low-cost by-products of pulp and paper mills, and their application for the production of soil improving agents is well known (Dong et al 2008;Shulga et al 2008a;Aimi et al 2009;Passauer et al 2012). It has been found that the interaction of the lignin-based soil conditioners with the mineral surface of soil particles has a complicated character and is realised via various types of binding, including the Van der Waals forces of attraction as well as electrostatic and electron-donor-acceptor interactions (Kullmann 1982).…”

Section: Introductionmentioning

confidence: 99%

Wood Processing by-Products Treated With the Lignin-Based Conditioner as Mulch for Soil Protection

Shulga

Betkers

Vītoliņa

et al. 2015

Journal of Environmental Engineering and Landscape Management

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Wood processing by-products such as bark of different wood species and hydrolysis lignin were applied as soil mulch. The lignin-based soil conditioner (LSC) representing a lignin-based polyelectrolyte complex with the different composition (a lignin/polymer mass ratio) was obtained under laboratory conditions and was intended to protect sandy soil from erosion by simultaneous application of a soil conditioner as an adhesive, mulch and plant seeds by hydroseeding. The study revealed the pronounced dependence of the properties of the treated wood-originated mulch on the wood species as well as on the composition, the applied concentration and the application rate of LSC. A comparison of the obtained results showed that the treated hydrolysis lignin was characterised by higher compressive strength, higher water resistance and lower moisture losses from sandy soil for a given LSC composition and application rate than the bark-based mulch. The conditioner concentrations don't have negative impact on the germination of seeds plants of the coastal dune zone.

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New Lignin-Based Polymers for Ecological Rehabilitation

Cited by 7 publications

References 6 publications

Stabilisation of an erodible soil using a chemical admixture

Stabilisation of an erodible soil using a chemical admixture

Specific features of sorption kinetics of heavy metal ions with polysaccharide materials from aqueous media

Wood Processing by-Products Treated With the Lignin-Based Conditioner as Mulch for Soil Protection

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