during estuarine mixing of fresh water with saline water and due to the flocculation process, aportion of dissolved metals come into particulate phase, and the dissolved load decreases. this process plays an important role in self-purification of heavy metals in rivers. in this study, flocculation of cu, mn, ni, pb and zn during mixing of cheshme-kileh river water with caspian sea water has bee...

this paper is to study the preparation of islamic azad university-firouzkoh branch to apply knowledge management. statistical population under the study includes all experts, managers and deputies of different parts in islamic azad university-firouzkoh branch. a survey approach is used to do the research and a questionnaire to collect the data needed. by nature, the methodology is an applied on...

this research was conducted in continuous flow bench scale fixed activated sludge (fas) and anaerobic filter (af). the main objective of the research was to study the feasibility and efficiency of the mentioned systems for cr (vi) removal. in fas reactor, cr (vi) was adsorbed from influent to mlss in the range of 89 to 99 percent and the adsorption followed freundlich isotherm. in af reactor, c...

background: the primary agricultural product in egypt is the cotton crop. children and adolescents work seasonally in the cotton fields applying pesticides. objectives: to examine the effect of pesticide exposure on clinical and biochemical parameters in children and adolescents applying pesticides. methods: male children currently applying pesticides and aged between 9 and 19 years (n = 50) we...

aims: in biological wastewater treatment processes, a large amount of sludge is produced. stabilization of sludge is essential before disposal because of the risks to human health and environment. therefore, selecting an appropriate process for stabilization this sludge may efficiently decrease risks. the aim of this study was to examine the compound efficiency of the advanced fenton and ozonat...

the existence of shift for periodically correlated processes and its boundedness are investigated. spectral criteria for these non-stationary processes to have such shifts are obtained.

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