Effect of pH in Biosorption of Nickel from Aqueous Solutions by Using of Microbial and Biomass of Derived from Plants

نوع مقاله : مقاله پژوهشی


1 گروه مهندسی عمران، دانشگاه آزاداسلامی، واحد تنکابن، تنکابن، ایران.

2 گروه مهندسی شیمی، مرکز تهران شمال، دانشگاه پیام نور، تهران، ایران


Pollution of water by heavy metals is a major problem such as nickel. In previous interpretations, it is compared the processes of removal and recycling of nickel metal from industrial wastewater. Research question is that which method with which pH is more effective for removal of heavy metals? Results show that biosorption, as an environmentally friendly method, has a brilliant performance and is a low-cost internal method for wastewater treatment. The biological treatment of effluents is carried out by microbial and biomass of derived from plants to examine the conversion of effluent into a harmless state. In a certain range of pH due to the operating conditions and used adsorbent are caused the reduction of . Because most of the functional groups such as carboxyl and phosphate have a negative charge, they encounter nickel ions that have a positive charge, and this leads to a Electrostatic attraction is absorbed between ( ) cations and negatively charged coupling sites. Under alkaline conditions, adsorption decreases due to the interaction between hydroxide ( ) and nickel ( ) anions and sediment formation. Therefore, determining the optimal pH from low pH values until the formation of sediment is of great importance for operational processes.