scholarly journals Production and Characterization of Paper Board Mill ETP Sludge Derived Hydrochar

2021 ◽  
pp. 1-8
Author(s):  
K. Sabarish ◽  
S. Paul Sebastian ◽  
M. Maheswari ◽  
P. Balasubramaniam ◽  
J. Ejilane
Keyword(s):  
Heavy Metals ◽  
Hydrothermal Carbonization ◽  
Sem Analysis ◽  
Molecular Surface ◽  
Point Of Zero Charge ◽  
Ftir Analysis ◽  
Porous Network ◽  
Structural Morphology ◽  
Zero Charge

Hydrothermal Carbonization an emerging technology for the conversion of biomass into carbon rich materials called as hydrochar. In this study, the paper board mill ETP sludge has been used for the production of hydrochar. The characterization of point of zero charge, Heavy metals, proximate and ultimate constituents, structural morphology (SEM), and molecular surface functionalities (FTIR) were also analysed. The results of Hydrochar showed slightly acidic pH (6.40), EC (1.33), and the pHPZC (point of zero charge) of 7.8 and the heavy metals content were found to be below detectable limit. FTIR analysis revealed that, the produced hydrochar have oxygen containing functional groups (-OH, C-O-C, -C=O). SEM analysis has the morphological features such as spongy, fuzzy and fluffy porous network on surfaces. These results of hydrochar can be act as an active adsorbent with further activation.

Characterization of multi-walled carbon nanotubes catalyst supports by point of zero charge

2011 ◽  
Vol 164 (1) ◽  
pp. 68-73 ◽  
Author(s):  
Sungchul Lee ◽  
Zhiteng Zhang ◽  
Xiaoming Wang ◽  
Lisa D. Pfefferle ◽  
Gary L. Haller
Keyword(s):  
Carbon Nanotubes ◽  
Point Of Zero Charge ◽  
Catalyst Supports ◽  
Zero Charge ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Production and Characterization of Rice Husk Biosorbent from Far North Cameroon

2019 ◽  
Vol 8 (2) ◽  
pp. 1
Author(s):  
Elie Kolwa Doboy ◽  
Henriette Zangue Adjia ◽  
Richard Kamga
Keyword(s):  
Phosphoric Acid ◽  
Specific Surface ◽  
Iodine Number ◽  
Rice Husk ◽  
Acid Treatment ◽  
Ph Value ◽  
Point Of Zero Charge ◽  
Far North ◽  
Zero Charge

The objective of this study is the production and the characterization of rice husk biosorbent. In fact, the biosorbent has been obtained by phosphoric acid treatment; its physicochemicals characteristics such as point of zero charge, specific surface, iodine number and chemicals functions have been determined. The analysis indicaded that, the point of zero charge is 8.7; for the pH value less than 8.7, the biosorbent surface is posotively charged and for pH value higher than 8.7, the biosorbent surface is negatively charged. The biosorbent iodine number is 1560.87±1 mg/g, it means that, the biosorbent is constituted in majority of microspores. Furthermore, the specific surface of biosorbent is 104.45±1m2/g, it is five times as big than untreated rice husk obtained by Dada and al., (2012). Acid treatment improve the porosity of biosorbent. Infrarouge spectrum present ether and aromatic functions.

scholarly journals Synthesis and Characterization of the Chitosan Silver Nanoparticle-Reinforced Borassus flabellifer Trichome- and Prosopis juliflora Wood-Based Nanocomposite for Environmental Application

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Ch. Nanda Krishna ◽  
Madhavi Katamaneni ◽  
Kalyan Chakravarti Yelavarti ◽  
B. Sobhan Babu ◽  
B. Ravi Kumar ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Spectroscopic Analysis ◽  
Prosopis Juliflora ◽  
Sem Analysis ◽  
Ftir Analysis ◽  
Environmental Application ◽  
Flexible Material ◽  
Characterization Study ◽  
Uv Visible

Wood is a wide flexible material appreciated extremely for its cost-effectiveness, great quantity, and biocompatibility. In addition, naturally existing materials possess prominent biomedical applications, and they can withstand efficiently when compared to other materials like glass, steel, and plastics. The present study revealed the prepared chitosan, silver nanoparticles incorporated with Borassus flabellifer trichome, and fabrication of Prosopis juliflora wood-based biomaterial. A characterization study was done by UV-visible spectroscopic analysis, FTIR analysis, and SEM analysis expressing and confirming a significant characteristic and morphological property of the prepared biomaterial.

Characterization of heavy metals in textile sludge with hydrothermal carbonization treatment

2021 ◽  
Vol 402 ◽  
pp. 123635
Author(s):  
Xueying Zhang ◽  
Jun Zhou ◽  
Zhenjia Xu ◽  
Peiru Zhu ◽  
Jiayang Liu
Keyword(s):  
Heavy Metals ◽  
Hydrothermal Carbonization ◽  
Textile Sludge

scholarly journals Modified biochar from Moringa seed powder for the removal of diclofenac from aqueous solution

2019 ◽  
Vol 27 (7) ◽  
pp. 7318-7327 ◽  
Author(s):  
Afrouz Bagheri ◽  
Emmanuel Abu-Danso ◽  
Jibran Iqbal ◽  
Amit Bhatnagar
Keyword(s):  
Aqueous Solution ◽  
Sem Analysis ◽  
Parent Material ◽  
Point Of Zero Charge ◽  
Maximum Adsorption Capacity ◽  
Ftir Analysis ◽  
Modified Biochar ◽  
Pseudo Second Order ◽  
Ph Conditions ◽  
Synthesized Materials

AbstractIn this study, Moringa seed powder (MSP) was pyrolyzed at 450 °C to synthesize Moringa seed powder biochar (MSPB) and treated with phosphoric acid (H3PO4) to synthesize phosphate-modified Moringa seed powder biochar (MSPB-HPO) as an adsorbent for the removal of diclofenac (Dfc) from aqueous solution. Fourier transform infrared (FTIR) analysis, energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and pH point of zero charge (pHpzc) were conducted to give more insight into the adsorbent’s properties. The SEM analysis showed the transformations in the surface morphology from the parent material to the synthesized materials after the thermal and acid treatment. EDS analysis revealed the variation in the elemental composition of the materials prior to and after adsorption of Dfc ions. The FTIR analysis showed changes and peak intensities of functional groups involved in Dfc removal. The pHpzc showed the charge carried by MSPB-HPO in different pH conditions. Isotherm data best matched the Sips model, and the pseudo-second-order model best described the adsorption kinetics. The maximum adsorption capacity of MSPB-HPO by Sips model was found to be 100.876 mg g−1.

scholarly journals Study on Solidification of Chromium-Containing Sludge With Alkali Slag Combined With Attapulgite

2021 ◽  
Author(s):  
Huirong Lin ◽  
Linghao Zeng ◽  
Pengpeng Zhang ◽  
Bingquan Jiao ◽  
YanChyuan Shiau ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Compressive Strength ◽  
Cementitious Materials ◽  
Ftir Analysis ◽  
Chemical Immobilization ◽  
Heavy Metal Leaching ◽  
Orthogonal Experiments ◽  
Leaching Toxicity ◽  
Solidified Body

Abstract In order to solve the harm of hazardous waste chromium-containing sludge to humans and the environment, this paper uses attapulgite to strengthen alkali slag to prepare cementitious materials to solidify/stabilize chromium-containing sludge. Single-factor and orthogonal experiments were used to optimize the preparation parameters of alkali slag cementitious materials. The compressive strength, heavy metal leaching toxicity, and microscopic characterization of chromium-containing sludge solidified body were tested to investigate the solidification effect and mechanism of chromium-containing sludge. The results show that: The best content of attapulgite is 4%. The compressive strength of the solidified body decreased with the increase of chromium sludge content, and the leaching concentration of Cr and Cu increased with the rise of chromium-sludge content. The addition of attapulgite enhanced the compressive strength. Compared with the original chromium-containing sludge, the leaching concentration of heavy metals in the solidified body is significantly reduced. The XRD and FTIR analysis showed that the solidified body might solidify/stabilize heavy metals by physical encapsulation of amorphous form and chemical immobilization. This research realizes the use of waste to treat waste and provides the possibility for the application of solidified products in construction.

scholarly journals Synthesis and Characterization of Water Dispersible Iron Oxide (�a-Fe2O3) Nanoparticles for Biomedical Applications

2020 ◽  
Vol 71 (10) ◽  
pp. 89-99
Author(s):  
Teodora Malaeru ◽  
Delia Patroi ◽  
Elena Enescu ◽  
Gabriela Georgescu ◽  
Eugen Manta ◽  
...  
Keyword(s):  
Aqueous Dispersion ◽  
Average Crystallite Size ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Ferromagnetic Behavior ◽  
Fe2o3 Nanoparticles ◽  
Structural Morphology ◽  
Water Dispersible ◽  
Ft Ir

In this study, L-lysine coated �a-Fe2O3 nanoparticles were synthesized by a chemical approach in two steps. In the first step �a-Fe2O3 nanoparticles were synthesized by a polyol-reduction method. XRD analysis confirmed the presence of cubic maghemite phase with an average crystallite size of 9.2 nm. SEM analysis showed that the prepared �a-Fe2O3 nanoparticles have a spherical structural morphology with the tendency of agglomeration and with size in the range 8.36- 10.69 nm. The �a-Fe2O3 nanoparticles were coated with L-lysine in the second stage in an aqueous dispersion with ultrasonication followed by a gentle heating at 40��C. FT-IR spectroscopy confirmed the presence of L-lysine on the nanoparticles surface and the Zeta potential also supported the coating of nanoparticles with a hydrophilic layer of amino acid (L-lysine) and a good stability in aqueous medium. Hysteresis loop shows a ferromagnetic behavior at room temperature for both samples.

Synthesis and Characterization of Chitosan/Hydroxyapatite Biocomposites Obtained by Reaction of Precipitation

2012 ◽  
Vol 727-728 ◽  
pp. 614-618 ◽  
Author(s):  
Rita de Cássia A. Leal ◽  
A.C.B.M. Fook ◽  
I.V.S.R. Nascimento ◽  
Marcus Vinícius Lia Fook
Keyword(s):  
Xrd Analysis ◽  
Sem Analysis ◽  
Tissue Response ◽  
Synthesis And Characterization ◽  
Ftir Analysis ◽  
New Bone Formation ◽  
Degradation Rates ◽  
Bone Graft Substitutes ◽  
Chitosan Biopolymer

There is a growing need for new biomaterials that can gain predictable and controlled tissue response, this is, that as bone graft substitutes should initiate new bone formation, after which they should get reabsorbed and replaced by bone tissue. This combination aims to improve the mechanical properties, degradation rates and absorption rates of biocompatibility and biodegradability. The aim of this study was to propose a synthetic route in which the HA was obtained by reaction of precipitation directly on evaluating the influence of chitosan biopolymer in the middle of precipitation in the characteristics of hydroxyapatite obtained. XRD analysis revealed the presence of HA phase with low crystallinity. In the FTIR analysis identified the characteristic bands of hydroxyapatite, as well as bands that characterize an interaction between chitosan and hydroxyapatite, as the band around 1050cm-1. SEM analysis of the biocomposites chitosan/HA, showed a dispersion of HA particles in chitosan, revealing a homogenous material and microporous.

scholarly journals Synthesis and Characterization of Hydrophilic gama-Fe2O3 Nanoparticles for Biomedical Applications

2019 ◽  
Vol 70 (6) ◽  
pp. 2026-2031
Author(s):  
Teodora Malaeru ◽  
Elena Enescu ◽  
Gabriela Georgescu ◽  
Delia Patroi ◽  
Eugen Manta ◽  
...  
Keyword(s):  
Heat Treating ◽  
Sem Analysis ◽  
Fe2o3 Nanoparticles ◽  
X Ray Diffraction ◽  
Raman Spectrometry ◽  
Structural Morphology ◽  
One Step ◽  
Ft Ir ◽  
Modified Polyol Method

The hydrophilic g-Fe2O3 nanoparticles coated with polyvinylpyrrolidone (PVP) were prepared in one step of the modified polyol method combined with an additional heat treating. The presence of maghemite (g-Fe2O3) phase was confirmed by using X-ray diffraction (XRD) and Raman Spectrometry on powder. FT-IR spectroscopy confirmed the presence of PVP on the nanoparticles surface and the Zeta potential also supported the coating of nanoparticles with a layer of PVP and a good stability in aqueous medium. SEM analysis showed that the prepared g-Fe2O3 nanoparticles have a spherical structural morphology with the tendency of agglomeration. Hysteresis loop shows a ferromagnetic behaviour at room temperature with a saturation magnetization up to 57 emu/g.

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