-
Characterization of Clays from the “Sè” Region in the South of Benin Used to Make Ceramic Water Filters
Akuemaho Virgile Onésime Akowanou,
Martin Pépin Aina,
Sènandémi Edwige Reine Mahunon,
Benjamin Kouassi Yao
Issue:
Volume 5, Issue 6, December 2017
Pages:
90-95
Received:
22 October 2017
Accepted:
1 November 2017
Published:
24 November 2017
Abstract: Clay materials have been used for centuries by local populations in ceramic pottery. This research aimed to examine natural clay as raw material for the manufacturing of ceramic pot filters. Thus, three clay samples were collected from a quarry in “Sè”, located in the southwestern part of the Benin Republic. All the samples were characterized using granulometric analysis, X-ray Powder Diffraction (XRD), loss on ignition (LOI), cation exchange capacity (CEC), and measurement of Atterberg’s limits. N2 adsorption technique were used to define specific surface areas and the major elements composing the clays were determined. The chemical and mineralogical analysis indicates that all of the samples contain various amounts of quartz and kaolinite, followed by muscovite and vermiculite. They also indicate that the clay materials are silico-aluminous clays. CEC and N2 adsorption showed as expected a low CEC and specific surface because of the presence of quartz and kaolinite quartz. The analyzed samples reveal that clays are very plastic, with an organic matter content ranging from 7.8% to 9.8% (loss on ignition). TGA analysis showed that the suitable sintering temperatures is from 700°C and above. Based on their mineral composition and physical properties, the clays are suitable as raw material for ceramic industry, especially for ceramic water filters.
Abstract: Clay materials have been used for centuries by local populations in ceramic pottery. This research aimed to examine natural clay as raw material for the manufacturing of ceramic pot filters. Thus, three clay samples were collected from a quarry in “Sè”, located in the southwestern part of the Benin Republic. All the samples were characterized using...
Show More
-
Study of the Structure of Chitosan Succinate Bombyx mori
N. R. Vokhidova,
U. M. Mamasoliev,
S. M. Yugay,
S. Sh. Rashidova
Issue:
Volume 5, Issue 6, December 2017
Pages:
96-100
Received:
5 October 2017
Accepted:
9 November 2017
Published:
1 December 2017
Abstract: The first time water solubility derivates of chitosan Bombyx mori was obtain. By FTIR method it was established the fact of formation of chitosan succinate. Influence of synthesis condition to structure of chitosan succinate was shown. It is revealed that, gel formation of chitosan succinate depend on the formation of both polyelectrolytic complex and covalent bonds.
Abstract: The first time water solubility derivates of chitosan Bombyx mori was obtain. By FTIR method it was established the fact of formation of chitosan succinate. Influence of synthesis condition to structure of chitosan succinate was shown. It is revealed that, gel formation of chitosan succinate depend on the formation of both polyelectrolytic complex ...
Show More
-
Physicochemical Characterization and Pesticide Residue Analysis of Honey Produced in West Shewa Zone, Oromia Region, Ethiopia
Eyobel Mulugeta,
Wodaje Addis,
Lemessa Benti,
Miresa Tadese
Issue:
Volume 5, Issue 6, December 2017
Pages:
101-109
Received:
9 October 2017
Accepted:
30 October 2017
Published:
8 December 2017
Abstract: This study investigated physicochemical properties and pesticide residue levels of honey from West Shewa Zone, Ethiopia. The results of moisture, electrical conductivity, pH, free acidity, reducing sugar, sucrose, ash, and total solids were found to be 16.61–18.64%, 0.384–0.646 mS/cm, 3.77–4.22, 7.42–13.87 meq/kg, 61.38–72.87%, 6.84–15.94%, 0.030–0.095%, and 81.36–83.28%, respectively. Correlation analysis has shown moderate positive correlation at P < 0.01 between sucrose and ash (r = 0.555), and a strong negative correlation between moisture and total solids (r = -0.9171). Residues of 4,4-DDD, 4,4-DDT, Dieldrin, α-Endosulfan, and β-Endosulfan were detected, among 20 organochlorine pesticides analyzed. Most physicochemical parameters have been found within the acceptable range set by national and international standards except sucrose content from Ejere and Toke Kutaye. The estimated daily intakes (EDIs) of pesticides identified in samples were below acceptable daily intakes (ADIs), that indicate honey ingesting has a negligible influence to toxicological risk.
Abstract: This study investigated physicochemical properties and pesticide residue levels of honey from West Shewa Zone, Ethiopia. The results of moisture, electrical conductivity, pH, free acidity, reducing sugar, sucrose, ash, and total solids were found to be 16.61–18.64%, 0.384–0.646 mS/cm, 3.77–4.22, 7.42–13.87 meq/kg, 61.38–72.87%, 6.84–15.94%, 0.030–0...
Show More
-
Effect of Seasonal Variation in the Composition of Major and Trace Elements of Lake Chamo, Ethiopia
Adane Gebresilassie Hailemariam,
Belete Yilma Hirpaye
Issue:
Volume 5, Issue 6, December 2017
Pages:
110-120
Received:
29 September 2017
Accepted:
10 October 2017
Published:
11 December 2017
Abstract: Water samples was collected from five sampling sites namely; inlet-1, inlet-2, center, outlet-1 and outlet-2 of Lake Chamo. The concentration of certain major and trace metals Na, K, Mg, Ca, Cr, Co, Ni, Mn and Cu were determined in the water within the two consecutive season winter (dry) and spring (wet) season using atomic absorption spectrometer (AAS) and flame photometer (FP). The results revealed that the dissolved metal concentration in water were, Na ranged from 18 - 22, Mg 0.34-0.97, K 10-19, Ca 1.6 -5.5, Cr 0.61- 4.0, Co 1.50-3.8, Ni 0.78-1.10, Mn 1.01– 1.98 and Cu 0.53 -1.20 mg/L in the winter season and in the spring season Na ranged from 12- 17.5, Mg 0.51- 0.62, K 10- 13, Ca 1.5- 3.9, Cr 0.60- 1.20, Co 1.50- 3.80, Ni 0.78-1.10, Mn 1.01–1.9 and Cu 0.50- 0.78 mg/L. the physicochemical values in the winter season were, PH ranged from 9.39 - 9.45, TDS 815 - 910 mg/L, conductivity 1746 -1965 µS/cm, temperature 25.5 – 27.6°C, salinity 0.87 - 0.93ppt, turbidity 21.59 - 28.21 NTU and DO 6.37 mg/L - 8.24 mg/L and in the next season (spring), PH ranged from 9.30 - 9.40, TDS 865 – 920mg/L, conductivity 1739 - 1960µS/cm, temperature 25.8 – 29°C, salinity 0.81- 0.87ppt, turbidity 22.59 - 37.21 NTU and DO 6.27 mg/L - 8.24 mg/L.
Abstract: Water samples was collected from five sampling sites namely; inlet-1, inlet-2, center, outlet-1 and outlet-2 of Lake Chamo. The concentration of certain major and trace metals Na, K, Mg, Ca, Cr, Co, Ni, Mn and Cu were determined in the water within the two consecutive season winter (dry) and spring (wet) season using atomic absorption spectrometer ...
Show More
