in this research degradation and mineralization of ortho-toluidine (ot) in the wastewater of petrochemical industries was investigated by uv/tio 2 process in a batch recirculating photo reactor. the influence of different variables such as initial ph, amount of tio 2 and initial concentration of ot on the reaction rate was investigated. in optimum conditions (1.75 g/l of catalyst, ph at 7 and i...

background: investigating the performance of naturally operated treatment plants may be due to the fact that they cannot be operated as desired, or that they should be modified to achieve good performance e.g. for nutrients removal. the advantage of kinetic coefficient determination is that the model can be adjusted to fit data and then used for analyzing alternatives to improve the process. th...

phenols are toxic organic compounds and which badly affects the flora and fauna of thebiosphere because phenols are persistent pollutant found in wastewater from many industries. in presentresearch article the photocatalytic removal of o-nitro phenol by synthesized magnetic nanoadsorbents(mna) carried out under photocatalytic reactor. the mna were synthesized by co-precipitation methodrequired ...

Performance of a rotating biological contactor (RBC) in treating municipal wastewater from primary sedimentation basin and anaerobically treated industrial effluent from an upflow anaerobic sludge blanket (UASB) reactor was investigated. The 280-L six-stage RBC pilot was operated at different organic loading rates and biodisc speeds. The overall removal efficiencies of soluble BOD decreased wit...

In this study, cotton stalks from Xinjiang Alar were used as raw materials. Preparation of modified straw-based activated carbon by microwave-assisted pyrolysis using H3PO4 activator. The effects different impregnation ratios, microwave power and irradiation time on the yield straw its adsorption performance Ni2+ in simulated wastewater investigated Lagergren’s quasi primary secondary kinetic e...

The aim of the research was to evaluate effectiveness removal Cu and Pb ions by algae. experiments were carried out in presence two algal populations: a pure culture Raphidocelis subcapitata, mixed chlorophyta population. involved model study, wastewater from manufacture batteries, study process kinetics. pH 4.0, initial concentrations metal 95.4 mg/L for 48.3 Cu, respectively. maximum sorption...

background: there are many varieties of compounds in chemical and petrochemical wastewater. one of the important members of the chlorophenols (cps) family is ρ-chlorophenol. this pollutant is introduced into the environment through various human activities such as waste incineration, uncontrolled use of wood preservatives, pesticides, fungicides and herbicides, as well as via bleaching the pulp...

recently, the use of biological absorbent in removal of hazardous pollutants such as heavy metals has increased because of the decrease in sludge problems, economical issues, high efficiency and compatibility with the environment. this study was done over the biosorption of nickel by biosolids obtained from the municipal wastewater treatment in a batch reactor. the pretreatment of the biosolids...

Dyes are utilized in various industrial applications, and some businesses' effluents include hazardous dyes. Humans, aquatic creatures, the environment all harmed by As a result, adequately treated dyes that manage wastewater must be before being discharged into nearby bodies of water. Adsorption has proven to high cost-effective removing from wastewater. The sorbent material for dye removal ef...