Response of osteoblast-like MC3T3-E1 cells on bioactive titanium fabricated by a chemical treatment process using a calcium-phosphate slurry

2013 ◽  
Vol 102 (11) ◽  
pp. 3838-3845 ◽  
Author(s):  
Naofumi Ohtsu ◽  
Mitsuhiro Hirano ◽  
Hirofumi Arai
Keyword(s):  
Calcium Phosphate ◽  
Chemical Treatment ◽  
Treatment Process

scholarly journals The role of a chemical loop in removal of hazardous contaminants from coke oven wastewater during its treatment

2019 ◽  
Vol 17 (1) ◽  
pp. 1288-1300
Author(s):  
Anna Kwiecińska-Mydlak ◽  
Marcin Sajdak ◽  
Katarzyna Rychlewska ◽  
Jan Figa
Keyword(s):  
Chemical Treatment ◽  
Treatment Process ◽  
Oxygen Demand ◽  
Coke Oven ◽  
Main Role ◽  
Biological Processes ◽  
Coal Processing ◽  
Wastewater Treatment Process ◽  
Iron Based

AbstractCoke oven liquor is one of the most contaminated liquid streams generated by the coal processing industry, thus its proper treatment and utilization is crucial for sustainable and environmentally neutral plant operation. The conventional wastewater treatment process comprises of chemical and biological processes. Within the current research the detailed role of chemical treatment is described. Commercially available iron-based coagulants (PIX100, PIX100COP, PIX113, PIX116) were tested to understand their removal efficiency and impact on the stream parameters. The influence of iron dose in the range of 300-500 mgFe/L on the process performance was also examined.It was found that the main role of chemical treatment was to bind toxicants harmful to activated sludge microorganisms, i.e. free and complex cyanides and sulphides. Among the tested iron-based conventional coagulants ferrous salts were more efficient than ferric salts. It was also observed that efficiency of the process strongly depended on wastewater properties (especially in regard to pH, which should be in the range of 9-10) and the coagulant selection needed to be done individually for a given wastewater type. The removal rates of particular contaminants were diversified and for free cyanides, complex cyanides and sulphides they were in the range of 23-91%, -156-77% and -357-98%, respectively. The expected, simultaneous removal of chemical oxygen demand (COD) during the treatment was not observed and even the parameter value increased after the process due to probable formation of compounds less vulnerable to oxidation.

Improved Surface Characteristics and Contact Performance of Epitaxial p-AlGaN by a Chemical Treatment Process

2006 ◽  
Vol 23 (2) ◽  
pp. 432-435 ◽  
Author(s):  
Shao Jia-Ping ◽  
Han Yan-Jun ◽  
Wang Lai ◽  
Jiang Yang ◽  
Xi Guang-Yi ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Treatment Process ◽  
Surface Characteristics

scholarly journals The anisotropic structure of electro conductive leather studied by Van der Pauw method

2019 ◽  
Vol 2 (3) ◽  
pp. 136-144
Author(s):  
Aulon Shabani ◽  
Majlinda Hylli ◽  
Ilda Kazani ◽  
Pellumb Berberi ◽  
Orion Zavalani ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Electrical Resistance ◽  
Surface Resistance ◽  
Treatment Process ◽  
Electrode Placement ◽  
Conductive Materials ◽  
Measuring Surface ◽  
Van Der Pauw ◽  
Placement Technique ◽  
Van Der Pauw Method

Determining the surface resistance of electro conductive refined natural leather materials is in the focus of this paper. Natural leather samples are initially transformed to conductive by applying chemical treatment process known as polymerization. Due to the existence of various techniques for measuring electrical resistance of conductive materials, we are focused on measuring surface resistance by arranging four electrodes in the edges of square leather samples, also known as Van der Pauw method. Improving the results accuracy, we use a multi-variant electrode placement over the sample edges. The result is the average of all results gained for different placements. Moreover, we use this electrode placement technique to analyse the anisotropy of conductive samples. The results of this research provide important knowledge about leather chemical treatment and its electrical proprieties.

Public Health Evaluation of Advanced Reclaimed Water for Potable Applications

1999 ◽  
Vol 40 (4-5) ◽  
pp. 247-252
Author(s):  
Joan B. Rose ◽  
Samuel R. Farrah ◽  
Debra Friedman ◽  
Kelley Riley ◽  
Carl L. Hamann ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Treatment Process ◽  
Reclaimed Water ◽  
Similar Treatment ◽  
High Ph ◽  
Cryptosporidium Oocysts ◽  
Treatment Train ◽  
Potable Water Supply ◽  
The City ◽  
Enteric Protozoa

The City of Tampa in the Southwest portion of Florida is examining the development of an advanced treatment facility for supplementing their potable water supply with highly treated reclaimed water. Full-scale microbiological monitoring of a similar treatment train demonstrated that the high-pH chemical treatment process was an effective barrier for removal and inactivation of viruses (99.99%), bacteria (99.9999%) and enteric protozoa (99.9%). A constructed pilot plant and bench-scale studies of the high-pH chemical process demonstrated that the removal of Cryptosporidium oocysts was due to physical removal and no inactivation was shown with up to 180 minutes exposure at a pH of 11.2. Combination of high-pH chemical treatment and chlorination were also ineffective at kill of Cryptosporidium oocysts.

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