Struvite is known to form a hard scale in specific areas of wastewater treatment plants. Besides causing problems; struvite can also be used as a fertilizer. Good and reliable solubility data is essential for controlling the crystallisation of struvite. One of the important factors that affect the crystallisation of struvite is solution pH. Therefore, this study was undertaken to investigate in...

In vitro fermentations of pure cellulose by mixed ruminal microorganisms were conducted under conditions in which pH declined within ranges similar to those observed in the rumen. At low cellulose concentrations (12.5 g/L), the first-order rate constants (k) of cellulose disappearance were successively lower at initial pH values of 6.86, 6.56, and 6.02, but in each case the value of k was maint...

The effects of dietary pH and viscosity on larval development of the New World screwworm, Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae), were studied in the laboratory using a gel-based and a cellulose fiber-based media. The mean initial pH of the standard gelled diet was lower (6.5 +/- 0.3) than that of the standard cellulose fiber-based diet (6.8 +/- 0.6). As larval development ...

Introduction: Discharge of textile wastewater causes the reduction of sunlight penetration, interferes with the receiving waters ecology and damage the environment. The aim of this study was to determine the removal efficiency of reactive blue 19 dye from aqueous solutions by cuttlefish bone powder. Materials & Methods: This study was performed experimentally and in laboratory scale. In thi...

OBJECTIVE To assess the pH of regular and light cola-based drinks and energy drinks, and examine the acid neutralizing capacity by the addition of artificial saliva. MATERIALS AND METHODS Ten packages of each product purchased locally at different stores were evaluated. The pH was measured by a pH-electrode calibrated in standard buffer solutions. To assess the pH neutralizing capacity, 1 ml/...

introduction: cadmium is a heavy metal with high toxicity and is best known as a carcinogen element. for protecting human health and environment it is necessary to remove excess cadmium from industrial wastewater before discharging it to surface and ground water. in this study the efficiency of zinc oxides nanoparticles in cadmium removal from aqueous solution was evaluated. methods: this is a ...

in the present study, different activated carbons were prepared from carbonized african beech wood sawdust by potassium hydroxide activation. the activated carbons were characterized by brunauer–emmett–teller, scanning electron microscope, fourier transform infrared spectroscopy, and thermogravimetric analyzer. the phenol adsorption capacity of the prepared carbons was evaluated. the different ...

adsorption capacity of 4-chloro-2-nitrophenol (4c2np) onto nano-ti02 from aqueous solutions wasinvestigated in a batch system by considering the effects of various parameters like contact time, nano-tio2 dosage, initial ph and initial 4c2np concentration. optimum conditions for 4c2np adsorptionwere found to be initial ph z 2, nano-tio2 closer- 0.01 g and equilibrium time 1 h. the adsorptionkine...

The individual and interactive effects of initial pH, temperature and initial substrate concentration on the growth of Clostridium pasteurianum was investigated in this study. Statistics based experimental designs are applied to optimize the process parameters for biomass concentration. The biomass concentration (g/l) was evaluated at various levels of initial substrate concentration, temperatu...