Mohammad Alizadeh Fard

Michigan Technological University | MTU · Department of Civil & Environmental Engineering

Poor mixing is considered to be the main reason for stagnation in water tanks. This can pose threats to public health. Internal tank piping with sprinklers (distributed outlets) has been previously proposed to avoid flow stagnation. This study is the first to use Computational Fluid Dynamics (CFD) modeling to investigate more cases and come up with...

Poor mixing in water storage tanks can cause stagnant zones that could pose negative public health effects. The present study uses Life Cycle Assessment to decide among the only three mixing options available, namely sprinkler, multiple inlets, and a mechanical mixer for the first time. These options were compared using different life-cycle assessm...

Background The aim of this study was to investigate the removal of Cr (VI) using Green-Graphene Nanosheets (GGN) synthesized from rice straw.Methods Synthesis of the GGN was optimized using response surface methodology and central composite design (CCD). The effect of two independent variables including KOH-to-raw rice ash (KOH/RRA) ratio and tempe...

Algae and bacteria can grow in water storage tanks when the water is stagnant. Although many variations of storage tank exist, many have the inlet and outlet pipes at the tank bottom. Stagnation occurs in the top portion of the tank from which water is not used since it is kept for emergencies only. A simple and passive method was developed in this...

Activated carbon was successfully prepared from Populous caspica wood by a thermochemical reduction method and modified by grafting amine groups. In the batch tests, pH, initial phosphate concentration, reaction time, and adsorbent dose were evaluated to remove phosphate (PO43–) from the aqueous phase. The response surface method was chosen to stud...

A new hydrothermal method was developed to prepare magnetic activated carbon nanocomposite to remove six micropollutants (Triclosan, Bisphenol-A, Tonalide, Metolachlor, Ketoprofen and Estriol) from water. These emerging pollutants are mainly coming from anthropogenic sources. Results indicated that the synthesized magnetic activated carbon was succ...

Poor mixing in storage tanks can cause stagnant zones that could pose negative public health effects. To eliminate stagnant zones in a cylindrical water storage tank, this study investigated the feasibility of a novel internal piping configuration consisting of a sprinkler-type inlet piping that distributed the incoming flow evenly across the water...

Electrofenton (EF) has been widely used to remove contaminants from aqueous solution, while Electrofenton-fenton (EFF), is a two stage process that employs partial electrolysis, needs further study. In addition, a combination of oxalate and persulfate with these systems (EF-Oxalate, EFF-Oxalate, EF-Persulfate, and EFF-Persulfate) could improve the...

Poor mixing in storage tanks can cause stagnant zones that could pose negative public health effects. To eliminate stagnant zones in a cylindrical water storage tank, this study investigated the feasibility of a novel internal piping configuration consisting of a sprinkler-type inlet piping that distributed the incoming flow evenly across the water...

Magnetic carbon nanotubes (MCNs) were synthesized using a new hydrothermal method. The new developed MCNs were evaluated for removal of Metolachlor, Bisphenol-A, Tonalide, Triclosan, Ketoprofen and Estriol from aqueous solutions. Using response surface methodology, a predicting removal model was developed based on solution pH, contact time, adsorba...

In this study, polyvinylpyrrolidone (PVP)-coated magnetite nanoparticles were synthesized to adsorb six emerging contaminants (Tonalide, Bisphenol-A, Triclosan, Metolachlor, Ketoprofen and Estriol) from aqueous solutions. The PVP-coated NPs were characterized by dynamic light scattering (DLS) measurements, thermal analysis, and X-ray diffraction. R...

The removal of BTEX (benzene, toluene, ethyl-benzene and p-xylene) from contaminated groundwater was evaluated by paper mill sludge-based activated carbon, prepared by chemical activation and pyrolysis.The effects of pH, time, adsorbent dosage and adsorbate concentration were studied through batch adsorption experiments. Selected physical and chemi...

This study investigates the disintegration of excess sludge produced in a membrane bioreactor (MBR) with electrocoagulation, electrofenton and electrofenton-Fenton processes. The optimum reaction times for electrocoagulation, electrofenton and electrofenton-Fenton processes were 120, 90 and 70 min, respectively. Technical and economical investigati...

The performance of a photo-reactor packed with titanium dioxide (TiO2) immobilized on glass beads, initiated by irradiation with natural and artificial ultraviolet (UV) sources, was evaluated in terms of the degradation efficiency of petroleum aromatic hydrocarbons. The effects of parameters such as pH, reaction time, hydrogen peroxide (H2O2) conce...

This study investigated the feasibility of nanoscale zero-valent iron(nZVI) as the source of catalytic ferrous iron for Fenton and photo-Fenton oxidation of petroleum aromatic hydrocarbons. The oxidation processes were able to degrade more than 99% of benzene, toluene, ethylbenzene, and xylene (BTEX) within 15min at pH 3.0, which the initial concen...

This work makes a comparison between electrocoagulation (EC), photoelectrocoagulation, peroxi-electrocoagulation and peroxi-photoelectrocoagulation processes to investigate the removal of chemical oxygen demand (COD) from pharmaceutical wastewater. The effects of operational parameters such as initial pH, current density, applied voltage, amount of...