Engineering and Technology Journal

The bentonite is an adsorbent material that is used frequently in industrial fields. bentonite was used with laser to treat wastewater, when laser is a new technique that has ability to remove the dye. Using of laser as a source to refresh with high efficiency has the important in industrial field.In this study laser diode with power 50 mw, He-Ne laser with power 10 mw and DPSSL with power 500 mw were used with the help of ultrasonic bath and H2O2 to promote the work of the laser. AFM and FTIR testing were made to bentonite to study the characteristics of it. Minitab program was used to facilitate calculations and choose the optimum parameters of experiments. The optimum input conditions of experiments to remove the dye from wastewater were chosen. The best concentration of bentonite is 4 g/l, the best temperature of wastewater is 42◦C, the best time of work is 27 min and the best concentration of H2O2 is 10%. It found from study that the increase of each parameters cause decrease in output concentration of wastewater. The accuracy of work was determined from Minitab program, it was 94.54%.

In the present work, specimens of polymeric composites were prepared from LDPE
with different wt% of TiO2 and Fe2O3 using a single screw extruder which operated at a
temperature of (150-170) Co. Results obtained reveal that after the addition of 7% of TiO2 to
LDPE, some of mechanical properties improved for example tensile strength increased from
(18.50 )MPa to (28.12) MPa tensile at break increased from (14.96) MPa to (26.02) MPa,
modulus of elasticity increased from (63) MPa to (193.98) MPa, hardness increased from
(48 ) to(75),while impact strength decreased from (0.18 ) to (0.02). After the exposure to
UV light all mechanical properties declined but pigment LDPE still has higher mechanical
properties unpigmented LDPE. Empirical equations were reached which could be used to
calculate one of the mechanical properties in terms of exposure time, weight percent of
pigment content and other mechanical properties.