scholarly journals Researching carbon varieties from season-caused shell for use of H2O2 properties to treat lead

2020 ◽  
Vol 4 (2) ◽  
pp. first
Author(s):  
Dao Minh Trung ◽  
Tram Thi Thanh Nguyen
Keyword(s):  
Heavy Metals ◽  
Functional Groups ◽  
Research Results ◽  
Chemical Mechanisms ◽  
Sem Image ◽  
Study Results ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Physical And Chemical ◽  
Ft Ir Spectroscopy

The study assumes lead wastewater treatment with initial concentration fixed at 30 ppm and research material, denatured coal prepared from macadamia seed shell activated by heating, and finally variable Coal calculation with H2O2 agent. The coal was modified by soaking coal in 25% H2O2 solution for 48 hours. Coal after denatured for adsorption results reached 266.26 mg/g, the research results show similarities with some previous studies. On the other hand, when analyzing the infrared spectrum of coal, the FT-IR spectroscopic results showed that after denatured coal, there were some functional groups such as OH-, C-O, C=O, C-N, functional groups capable of participating in the adsorption of heavy metals in wastewater. When observing the SEM image, the photo results of the material show that the surface of the material is rough, with many pores and different sizes evenly distributed on the surface. From SEM image results and FT-IR spectroscopy results show that the material has the ability to adsorb heavy metals by many physical and chemical mechanisms. Indeed, when researching the application of materials to the treatment of lead heavy metals in presumptive wastewater, the research results show that lead treatment efficiency reaches 94.05% when surveyed at the same optimal conditions at pH = 6 with dose of 0.4 g/L and duration of 60 minutes. The control shows that the study results are similar to some previous research results, from which it can be confirmed that the modified coal material is capable of Pb (II) treatment in wastewater.

scholarly journals MINERALOGICAL CHARACTERIZATION STUDIES ON UNBURNT CERAMIC PRODUCT MADE FROM ROCK RESIDUE ADDITIVES BY FT-IR SPECTROSCOPIC TECHNIQUE

2013 ◽  
Vol 22 ◽  
pp. 62-70 ◽  
Author(s):  
R. VIJAYARAGAVAN ◽  
S. MULLAINATHAN ◽  
M. BALACHANDRAMOHAN ◽  
N. KRISHNAMOORTHY ◽  
S. NITHIYANANTHAM ◽  
...  
Keyword(s):  
Qualitative Analysis ◽  
Functional Groups ◽  
Spectroscopic Technique ◽  
Ceramic Product ◽  
Minor Constituent ◽  
Mineralogical Characterization ◽  
Ceramic Samples ◽  
Ft Ir ◽  
Characterization Studies ◽  
Ir Spectroscopic

The usability of waste rock (rock residue) powder as an additive material in ceramic samples was investigated. Qualitative analysis was carried out to determine the major and minor constituent minerals present in ceramic bodies made from rock residue powder by using FT-IR spectroscopic technique. Further, the representative ceramic bodies are analyzed by FT-IR technique to yield more information about the functional groups and also to estimate the order or disorder of kaolinite structure.

scholarly journals Sensitivity and Calibration of the FT-IR Spectroscopy on Concentration of Heavy Metal Ions in River and Borehole Water Sources

2020 ◽  
Vol 10 (21) ◽  
pp. 7785
Author(s):  
Matthew Mamera ◽  
Johan J. van Tol ◽  
Makhosazana P. Aghoghovwia ◽  
Elmarie Kotze
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ir Spectroscopy ◽  
Water Sources ◽  
Partial Least Square ◽  
Least Square ◽  
Borehole Water ◽  
Ft Ir ◽  
Ir Calibration ◽  
Ft Ir Spectroscopy

Heavy metals in water sources can threaten human life and the environment. The analysis time, need for chemical reagents, and sample amount per analysis assist in monitoring contaminants. Application of the Fourier Transform Infrared (FT-IR) Spectroscopy for the investigation of heavy metal elements has significantly developed due to its cost effectiveness and accuracy. Use of chemometric models such as Partial Least Square (PLS) and Principle Component Regression Analysis (PCA) relate the multiple spectral intensities from numerous calibration samples to the recognized analytes. This study focused on the FT-IR calibration and quantification of heavy metals (Ag, Cd, Cu, Pb and Zn) in surveyed water sources. FT-IR measurements were compared with the atomic absorption spectrometer (AAS) measurements. Quantitative analysis methods, PCA and PLS, were used in the FT-IR calibration. The spectral analyses were done using the Attenuated Total Reflectance (ATR-FTIR) technique on three river and four borehole water sources sampled within two seasons in QwaQwa, South Africa (SA). The PLS models had good R2 values ranging from 0.95 to 1 and the PCA models ranged from 0.98 to 0.99. Significant differences were seen at 0.001 and 0.05 levels between the PLS and PCA models for detecting Cd and Pb in the water samples. The PCA models detected Ag concentrations more (˂0 mg L−1 on selected sites). Both the PLS and PCA models had lower detection only for Zn ions mostly above 45 mg L−1 deviating from the AAS measurements (<0.020 mg L−1). The FT-IR spectroscopy demonstrated good potential for heavy metal determination purposes.

scholarly journals FTIR analysis and the effects of alkyd/melamine resin ratio on the properties of the coatings

2009 ◽  
Vol 63 (6) ◽  
pp. 637-643 ◽  
Author(s):  
Suzana Cakic ◽  
Ljiljana Boskovic
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Curing Temperature ◽  
Ftir Analysis ◽  
Curing Time ◽  
Melamine Resin ◽  
Coating Properties ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Alkyd/melamine resin mixtures are mainly used in industrial baking enamels. The effects of the alkyd/butylated melamine resin ratio (from 90/10 to 50/50) and curing temperature (from 110 to 180?C) on the crosslinking and properties of the coating are presented in this paper. The curing reactions through functional groups of resins were monitored by FT-IR spectroscopy. The hardness, elasticity, degree of adherence and gloss were also determined. Optimal coating properties could be achieved with an alkyd/melamine resin ratio of 80/20, a curing temperature of 150?C and a curing time of 20 min.

scholarly journals Evaluating soil quality at a landfill: a study case from morocco (tangier)

2019 ◽  
Vol 9 (4) ◽  
pp. 317-325
Author(s):  
Ikram Chaer ◽  
Asmae El Cadi ◽  
Jamal Brigui ◽  
Khadija Ziat ◽  
Mohamed Khaddor
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Mineral Matter ◽  
X Ray Diffraction ◽  
Work Effort ◽  
Different Types ◽  
Ft Ir ◽  
Study Case ◽  
Ft Ir Spectroscopy

In recent decades, landfill sites have been a potential source of contamination, which can hurt the environment due to the accumulation of heavy metals and processed organic products. In the Tangier landfill, the different types of wastes are missing any prior treatment or any soil of protection. This behavior constitutes a risk factor of contamination for the soil and groundwater. Between the waste and soil, many physicochemical and biological reactions occur. The objective of this work effort is to derive a global and in-depth characterization of the organic and mineral matter of the soil samples from the Tangier landfill. The study of organic matter (OM) in soils helps to understand the evolution of soil contamination. Eight samples of soil have been studied using a range of chemical and physical analytical methods. FT-IR spectroscopy and X-ray diffraction analyses have used to investigate the nature of organic matter. The analysis of heavy metals in the soil showed that there is a significant presence of Pb, Cd, As, Cr and Zn quantities which are mainly due to industrial waste.

scholarly journals The Synthesis of silica nanoparticles from Vietnamese rice husk - Application for adsorption of heavy metals in industrial wastewater

2020 ◽  
Vol 4 (4) ◽  
pp. First
Author(s):  
Đào Thi Băng Tâm ◽  
Nguyễn Trung Độ ◽  
Lưu Kiến Quốc ◽  
Hà Thúc Chí Nhân
Keyword(s):  
Heavy Metals ◽  
Rice Husk ◽  
Environmental Remediation ◽  
Atomic Spectroscopy ◽  
X Ray Diffraction ◽  
Silica Nanomaterials ◽  
Important Solution ◽  
Ft Ir ◽  
Living Organisms ◽  
Ft Ir Spectroscopy

Heavy metals are known to be toxic, even at low content (ppm), for living organisms[1,2]. The presence of heavy metals and other pollutants in water continues to be a major concern and the removal of such contaminants is considered as an important solution for environmental remediation[3,4]. In this paper, we study the ability adsorption of  Pb2+ and Cd2+ heavy ionic metal on silica nanomaterials which was extracted and purified from Vietnamese rice husk. The structure of the materials was investigated by X-ray diffraction (XRD) and FT-IR spectroscopy. By Adsorption Atomic Spectroscopy (AAS) analysis, the results have demonstrated the time taken for attaining equilibrium adsorption is about 1.5 hours for both cases, and the adsorption capacity of Pb2+ and Cd2+ on silica are 21 and 24 mg/L, respectively.

scholarly journals Copper Enhanced Monooxygenase Activity and FT-IR Spectroscopic Characterisation of Biotransformation Products in Trichloroethylene Degrading Bacterium:Stenotrophomonas maltophiliaPM102

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Piyali Mukherjee ◽  
Pranab Roy
Keyword(s):  
Maximum Activity ◽  
Crude Enzyme ◽  
Monooxygenase Activity ◽  
Ammonium Sulphate Precipitation ◽  
Oxygenase Activity ◽  
Biotransformation Products ◽  
Ft Ir ◽  
Tce Degradation ◽  
Ir Spectroscopic ◽  
Ft Ir Spectroscopy

Stenotrophomonas maltophiliaPM102 (NCBI GenBank Acc. no. JQ797560) is capable of growth on trichloroethylene as the sole carbon source. In this paper, we report the purification and characterisation of oxygenase present in the PM102 isolate. Enzyme activity was found to be induced 10.3-fold in presence of 0.7 mM copper with a further increment to 14.96-fold in presence of 0.05 mM NADH. Optimum temperature for oxygenase activity was recorded at36∘C. The reported enzyme was found to have enhanced activity at pH 5 and pH 8, indicating presence of two isoforms. Maximum activity was seen on incubation with benzene compared to other substrates like TCE, chloroform, toluene, hexane, and petroleum benzene.KmandVmaxfor benzene were 3.8 mM and 340 U/mg/min and those for TCE were 2.1 mM and 170 U/mg/min. The crude enzyme was partially purified by ammonium sulphate precipitation followed by dialysis. Zymogram analysis revealed two isoforms in the 70% purified enzyme fraction. The activity stain was more prominent when the native gel was incubated in benzene as substrate in comparison to TCE. Crude enzyme and purified enzyme fractions were assayed for TCE degradation by the Fujiwara test. TCE biotransformation products were analysed by FT-IR spectroscopy.

scholarly journals Application of FT-IR Spectroscopy for Fingerprinting Bioactive Molecules in a Nutraceutical PROMEN, comparatively with Plantingredients

2013 ◽  
Vol 70 (1) ◽  
pp. 68
Author(s):  
Florina Csernatoni ◽  
Carmen Socaciu ◽  
Raluca Maria Pop ◽  
Florinela Fetea
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Food Supplement ◽  
Bioactive Molecules ◽  
Ft Ir ◽  
Fingerprint Region ◽  
Phenolic Derivatives ◽  
Ft Ir Spectroscopy

The aim of this study is to characterize and identify the main biomarkers of food supplement PROMEN by analysis of plant ingredients comparatively with the final product. Alcoholic extracts of plants were prepared at 15% plant content and purified fractions were analyzed by FTIR screening. The fingerprint region (1000 to 1500 cm-1) indicated the presence of specific functional groups to identify and monitor the phenolic derivatives.

Coordination of uranium(vi) with functional groups of bacterial lipopolysaccharide studied by EXAFS and FT-IR spectroscopy

2011 ◽  
Vol 40 (38) ◽  
pp. 9868 ◽  
Author(s):  
Astrid Barkleit ◽  
Harald Foerstendorf ◽  
Bo Li ◽  
André Rossberg ◽  
Henry Moll ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Bacterial Lipopolysaccharide ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Characterization and Thermal Properties of Sol-Gel Processed PMMA/SiO2 Hybrid Materials

2008 ◽  
Vol 55-57 ◽  
pp. 749-752
Author(s):  
A. Buasri ◽  
K. Liangraksa ◽  
T. Sirisom ◽  
N. Tangkachalakul
Keyword(s):  
Hybrid Materials ◽  
Hybrid Material ◽  
Sol Gel ◽  
Inorganic Materials ◽  
Pure Pmma ◽  
Interesting Phenomenon ◽  
Near Surface ◽  
Sem Image ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Hybrid organic-inorganic materials were fabricated using sol-gel technique using poly(methyl methacrylate) and methacrylic acid 3-(trimethoxysilyl)propyl ester (MAMSE) with 90/10, 80/20 and 70/30 (%w/w) ratios with tetrahydrofuran (THF) solvent. The thin films were then characterized using FTIR spectra, SEM, DSC and TGA thermograms. From the preliminary characterization, the hybrid material was found to have nano and ultra scale tight pore ranges. FT-IR spectroscopy uncovered all the signature peaks characteristic of silicate structures in the near-surface regions. Fingerprints of Si-O-Si groups in cyclic and linear molecular substructures are present. The SEM image clearly shows that hybrid materials have homogenous and smooth surface. DSC analysis of the material shows interesting phenomenon regarding glass transition temperature (Tg). The hybrid material was found to have higher Tg than pure PMMA. From TGA analysis, the hybrid materials were observed to have higher thermal stability than pure PMMA.

Crosslinking of Gelatin in the Reaction with Formaldehyde: An FT-IR Spectroscopic Study

1996 ◽  
Vol 50 (10) ◽  
pp. 1314-1318 ◽  
Author(s):  
T. Salsa ◽  
M. E. Pina ◽  
J. J. C. Teixeira-Dias
Keyword(s):  
Principal Component Regression ◽  
Principal Component ◽  
Potassium Bromide ◽  
Crosslinking Reaction ◽  
Spectral Changes ◽  
Principal Component Regression Analysis ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Kinetics Of ◽  
Ft Ir Spectroscopy

The reaction of an aqueous solution of formaldehyde with gelatin dispersed in a potassium bromide pellet is monitored in real time by FT-IR spectroscopy. Principal component regression analysis of the spectra recorded at different times is carried out. On the whole, the latter results and the observed spectral changes are in agreement with a previously reported interpretation for the kinetics of the crosslinking reaction of gelatin with formaldehyde, according to which the reaction is initialized by the lysine–methylol formation and is subsequently followed by arginine–methylol, which, in turn, reacts with lysine–methylol to originate arginine–lysine crosslinks.

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