Nowadays desalination is one of the main resources to obtain water in many areas. The most advanced method for water filtration is reverse osmosis. In this system, water is injected into semimembranes by using power pumping, and its salt water is taken away from the solution. This paper has tried to offer guidelines to use the pressure created in situ of harvesting water, instead of utilizing power pump, which produces the necessary pressure for the reverse osmosis. These guidelines have been divided into 2 main groups: Using the created natural pressure, and the other way is using the pressures that are caused by the constructions built for harvesting water.

As an important step in effectively reducing seismic risk and the vulnerability of the city of Mobarakeh to earthquakes, a site effect microzonation Study was conducted. Seismic hazard analysis for a return period of 475 years was carried out. Data from 10 borings was collected and analyzed, geophysical surveys were conducted and seismology and geoelectric measurements taken in more than 17 stations through out the city. The study area was divided into a grid of 500 × 500 m 2 elements and the sub-surface ground conditions were classified into 5 representative geotechnical profiles. Electric resistivity was measured in close to 17 geotechnical boreholes and surface and sub-surface sediments were collected and analyzed. Site response analyses were carried out on each representative profile using 30 different base rock input motions. Distribution maps of site periods and peak ground acceleration and old and new texture buildings through out the city were developed, providing a useful basis for land-use planning in the city.

Herein, firstly zeolite was modified with Na + and Fe 3+ ions and then immobilized on polyethylene surface to construction of modified zeolite coated surface (MZCS). The prepared MZCS was characterized by using XRD, ATR-FTIR, SEM and EDXA techniques and its ability toward phosphate removal was examined and compared with unmodified zeolite coated surface (ZCS). Affecting parameters on phosphate removal were investigated and our results showed the ZCS and MZCS achieved to 32.4% and 70.6% phosphate removal ability after 2 h, for 25.0 ppm phosphate at pH 7.0, respectively. The phosphate adsorption results very well fitted in the Langmuir isotherm model for both the ZCS and MZCS. The maximum adsorption capacity as 6.317 and 7.097 mg/g was observed for the ZCS and MZCS, respectively. Finally, the application of the ZCS and the MZCS for phosphate removal from wastewater and its effect on microalgae growth was tested in two media with three replications. Observed results were presented and discussed here.

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