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The biogenic silica produced through a thermochemical method was reacted with sodium hydroxide (NaOH) to form sodium silicate and the produced sodium silicate was titrated with 1 M citric acid to ...
Conclusions Overall, this study presents a novel continuous silica extraction method for the ecient recovery of silica from rice husk‑based bioreneries. Keywords Rice husk, Biogenic silica, Continuous extraction, Pilot‑scale, One‑pot treatment, Ball milling, Alkaline hydrothermal *Correspondence: Jin Hyung Lee [email protected]
Background Rice husk is the most silicon-rich renewable biomass and can be used as a raw material for producing silicon-based materials. With the increasing interest in utilizing rice husk as a renewable resource, the development of a robust silica extraction method is required. In this study, a one-pot alkali hydrothermal and ball-milling continuous silica …
Biogenic silica derived from Equisetum arvense was used as a carrier of an eco-friendly biocide consisting ... Materials and methods 2.1. Materials Neem bark extract (NBE) was used as biocide ...
The untreated biomasses were subjected to TG–DTA (Fig. 1). The rice husk from Italy (data not shown) exhibited a thermogram similar to rice husk from Cambodia. Three characteristic peaks can be identified in the thermograms of all untreated biomasses. Table 2 gives an overview of the weight losses (WL) for these three s…
E. myriochaetum was subject to conventional acid digestion to extract biogenic silica with a% yield remarkably higher (up to 3 times) than for other Equisetum sp. (i.e. E. Arvense). The surface area of the isolated silica was ∼400 m 2 /g, suitable for biotechnological applications. Biogenic silicon was obtained by magnesiothermic reduction.
To the best of our knowledge, it was never obtained in a such way. Apart from that, silica obtained by different methods were characterized by various methods. Materials, such as natural rubber filled with biogenic silica, can be interesting alternative for conventional ones, that require conducting often complicated and wasteful procedures.
Extraction methods include solvent extraction, distillation method, pressing and sublimation according to the extraction principle. ... high capacity and low cost of adsorbents such as silica gel and macroporous resins. The separation is based on the differences between the adsorption affinities of the natural products for the surface of the ...
Another rich source of biogenic silica is common horsetail (Equisetum arvense L.), containing up to 25% SiO2 in the dry matter. In this study, biogenic silica was obtained from …
Synthetic amorphous silica (SAS) can be produced by either a vapor-phase hydrolysis process, yielding pyrogenic (fumed) silica, or by a wet process, yielding hydrated silica (precipitated...
The initiation of silica formation by callose is the first example whereby any biomolecule has been shown to induce, as compared to catalyse, the formation ofsilica in an undersaturated solution of silicic acid. BackgroundThe horsetails (Equisetum sp) are known biosilicifiers though the mechanism underlying silica deposition in these plants remains largely …
The grain-size distribution of lake sediments is a crucial proxy for paleoclimate reconstruction, as it is closely related to the transport dynamics of clastic materials from the surrounding land. However, the presence of biogenic silica, particularly remains of diatom frustules, can significantly bias the grain-size distribution of lake-sediment samples. To remove …
Thus, this method of SiO 2 extraction was shown to be highly effective as well as being rather mild. SEM-EDX—Quantitative Analysis—of the Final Sample of Horsetail . The ... The common horsetail is considered to contain the highest percentage of amorphous ... This has been only possible due to the biogenic silica structures stabilizing such ...
A thermo-chemical treatment method was used to produce biogenic amorphous silica from South African sugarcane and maize residues. Different fractions of South African sugarcane (leaves, pith, and fiber) were processed for silica production. The biomass samples were leached with either 7 wt% citric acid or 7 wt% sulfuric acid at 353 K for 2 h prior to being …
Abstract Biomasses are a sustainable, CO 2 neutral source used in biorefining. Si-accumulating plants can be used for the production of biogenic silica in a biomass valorisation process. This study examines the production of high-grade porous silica from different plant parts like rice, oat and spelt husk, rice straw and horsetail using a generalized procedure for all. The …
Biogenic porous silica and silicon sourced from Mexican Giant Horsetail (Equisetum myriochaetum) and their application as supports for enzyme immobilization. Colloids and Surfaces B: Biointerfaces ...
The biogenic silica produced through a thermochemical method was reacted with sodium hydroxide (NaOH) to form sodium silicate and the produced sodium silicate was titrated with 1 M citric acid to ...
the measurement of biogenic silica (BSi) in sediments. Three modifications of thisbasic technique are commonly used: 1) A moderate strength base is used (2 M and the sample is digested for 5 hours after which the amount of Si extracted is measured (Mortlock & Froelich, 1989); 2) A weak base is used for the extraction solution (1% and the
Biogenic Silica in Plant Tissues: Comparison of 3 Extraction-Methods and Analysis with Spectrophotometry and ICP-OES (German Version) Matthias Birkicht See full PDF download Download PDF
Common horsetail plant is used in the treatment of osteoporosis, bone fracture repair, skin and hair treatment, improvement of cardiovascular problems, and relief of rheumatic pain due to its phenolic compounds and silicon element. In this study, the effect of water (), ethanol (90%), methanol (90%), and water–ethanol (50:50%) solvents on the extraction of …
Amorphous silica, e.g. biogenic silica (BSi), contained in diatoms and in sponge spicules was estimated by time course extraction from surficial sediment samples of 82 Florida lakes.
Tiron [4,5-dihydroxy-1,3-benzene-disulfonic acid disodium salt, (HO) 2 C 6 H 2 (SO 3 Na) 2] is currently used as a selective extractant for amorphous silica in soils. Because Si in the shoots is mostly composed of amorphous opaline silica particles (i.e. phytoliths), we tested the Tiron extraction procedure for plants. •
For HRP, loading onto biogenic silica via the glutaraldehyde immobilization technique (route B) was most effective. The loading of CiP showed a much higher peroxidase …
Following the same recipe, Bogireddy et al. [117] obtained biogenic amorphous silica from the stems of the giant horsetail, functionalized it with APTES and grown PtNPs on the obtained substrate ...
The present study summarizes the current literature on the presence and the structure of biogenic amorphous silica (BAS) in nature. Based on this review, it is shown that BAS is ubiquitous in ...
Another physical method of extraction—the ball mill process, is a mechanical technique that utilizes a rotating cylindrical chamber filled with balls to produce fine particles by reducing the size of the material through collision. ... Yadav M, Dwibedi V, Sharma S, George N (2022) Biogenic silica nanoparticles from agro-waste: properties ...
SUMMARY. Methods for determination of low levels of biogenic silica (0.2-0.4 mg SiO2) in aqueous samples after digestion with three wetalkaline extraction procedures compared favourably in both precision of replicates and recovery of silica utilized by diatoms in budgeted cultures. Leaching samples with 0.2 M NaOH for 10-15 min at 100°C was the least time …
Keywords Horsetail · Furan · Sugars compounds · Biogenic silica · Heat energy Introduction There are many types of silicon accumulating plants but their extraction yields differs greatly due to differences in the biochemical pathway of silicon uptake by the roots [1]. These plants include grasses such as maize, wheat and rice,
A single 100-min digestion technique at 100°C using 5% Na 2 CO 3 solution has been proposed for estimating the BSi in sediments and suspended matter (Kamatani, 1980; Kamatani and Takano, 1984), and this method evaluates dissolved silica from the coexisting aluminosilicates by analysis of aluminum extracted into the alkaline solution. Ragueneau and …
Synthetic amorphous silica (SAS) can be produced by either a vapor-phase hydrolysis process, yielding pyrogenic (fumed) silica, or by a wet process, yielding hydrated …
