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Preparation of Tools and Materials In addition to the preparation of waste samples, the medium used in the form of Zobell media was also prepared.
High COD concentrations indicate the presence of organic materials contained in wastewater, both those that are easily decomposed and those that are difficult to decompose [6].
The decrease in COD concentration was caused by a bacterial oxidation process which breaks down organic and inorganic materials in the wastewater sample into carbon dioxide and water.
Materials Science and Engineering 1173 (2021): 2–13. https://doi.org/10.1088/1757-899X/1173/1/012018 [19] Sari E, Habiba S, Budiono A, and Kusuma R.
Journal Engineering 4 (2012): 1–10

Materials Review, 2006,20 (11) :404-408
Materials Review, 1997, 11 (2) :61-64
Journal of inorganic Materials, 2003,18(1):103-108
Materials Review, 2002, 16 (5): 17
Materials Review, 1997,11 (4) :53-56

Journal of Cleaner Production, 2005, 13(1): 1-17
Journal of Manufacturing Systems, 2014, 33(1):196-208
International Journal of Machine Tools and Manufacture, 1996, 36(9): 1059-1072
Advanced Materials Research, 2011, 188: 348-351
Mechanical Science and Technology, 2005, 24(3): 269-272.

Introduction Since 1980s, antibacterial materials have drawn more attention of scientists [1].
Harizanova: Solar Energy Materials & Solar Cells Vol.63 (2000), pp. 185
Yang: Journal of Material Science and Engineering Vol.21 (2003), pp. 379
Yang: Rare Metal Materials and Engineering Vol.33 (2004), pp. 52
Xu: Journal of Functional Materials and Devices Vol.32 (2001), pp. 649

Introduction Metal Matrix Composites (MMC) differs from common engineering materials in many ways but most significant difference is that the material does not exist until the component itself is made.
“Particle Distribution in Cast Metal Matrix Composites-Part I”, Journal of Materials Processing Technology, Vol.123, pp.251–257
“Production and Mechanical Properties of Al2O3-Particle Reinforced 2024 Aluminum Alloy Composites”, Journal of Materials Processing Technology, vol.161, pp.381–387
“Metallurgical and Mechanical Characterization of Stir Cast AA6061-T6–Alnp Composite”, Materials and Design, Vol.40, pp.52–58
“Manufacture of Aluminium Metal Matrix Composite (Al7075-SiC) by Stir Casting Technique”, Materials Today: Proceedings, pp.3403-3408

Kaolin is one of the most versatile materials used in industry.
Materials and Methods Kaolin pretreatment.
Ali: Journal of Association of Arab University for Basic and Applied Sciences Vol. 9 (2010), p. 2-5 [3] M.
Buhl: Journal of Association of Arab University for Basic and Applied Sciences Vol. 15 (2014), p. 35-42 [4] Z.
Diaz: Micropore and Mesopore Materials Vol. 215 (2015), p. 29-36 [7] J.

Several transition metals, such as Fe[1-4], Ni[5-6], Cu[7-9], Mn[10-11] etc. have been proposed as suitable materials for oxygen carriers in CLC.
In 1992 the MCM-41 of mesoporous silica materials were successfully synthesized.
Later, people with different surfactants, depending on the assembly line, have been successfully prepared SBA-15 mesoporous silica materials.
Due to the mesoporous material SBA-15 and its derivatives in structure performance advantages, it would be a new type of inorganic or inorganic/organic composite functional materials in catalysis.
Jerndal, et al: submitted to Journal of Chemical Engineering Science(2011), 4636 [6] Forero, C.

[5] Yan W Y.Materials Science and Engineering A, 2006,427(1-2):348-355
Materials Letters, 2005, 59 (6): 705-709
Materials Science and Engineering A, 2012, 546: 53-58 [14] Kocich R, Kursa M, Szurman I, Dlouhy A.
Materials Science and Engineering A. 2009, 512: 100-104 [17] Cheng X H, Li Z H.
Materials and Design, 2006, 27(4): 324-328

He, Ba1−xLaxFe12O19 (x = 0.0, 0.2, 0.4, 0.6) hollow microspheres: material parameters, magnetic and microwave absorbing properties, Journal of Materials Science: Materials in Electronics, 27(11) (2016) 11231-11240
Sözeri, Synthesis, characterization and magneto optical properties of BaBixLaxYxFe12-3xO19 (0.0≤x≤0.33) hexaferrites, Journal of Magnetism and Magnetic Materials, 416 (2016) 261-268
Jin, Synthesis, structure and magnetic properties of hexagonal BaFe12O19 ferrite obtained via a hydrothermal method, Journal of Materials Science: Materials in Electronics, 27(10) (2016) 10864-10868
Le, Growth of single crystals of BaFe12O19 by solid state crystal growth, Journal of Magnetism and Magnetic Materials, 416 (2016) 384-390
Zherebtsov, Experimental study and thermodynamic modeling of phase equilibria in the system BaO-Fe2O3, Materials Science Forum, 843 (2016) 16-21

Synthesis and Characterization of Hexagonal Boron Nitride Nanosheets Guo Chao1, Dong Limin1, 2, Gong Shijun1, Miao Chunyu1, Zhang Xianyou1, a 1College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China 2Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin China acorresponding author: zhangxianyou163@163.com Keywords: Hexagonal boron nitride; Nanosheets; Solid-phase sintering Abstract.
And the SEM images show the sheetlike materials with a diameter of about 500-900 nm, and the thickness is about 100 nm.
No diffraction peaks for other phases or materials are observed in XRD patterns, indicating a high purity and crystallinity of the final products.
Journal of Liao-dong University (Natural Sciences).
Journal of Crystal Growth, 311 (2009), 3682-3686