Design and fabrication of nanocomposite-based polyurethane filter for‏ ‏improving municipal waste water quality and removing organic pollutants

Abstract

Nanotechnology has been used in different industries for years. In this study, polyurethane filter, modified with nano-sized polypyrrole–ZnO was used for wastewater quality improvement. The effect of coating method and influential parameters on polymer morphology was studied by Fourier transform infrared spectroscopy and scanning electron microscopy. The results revealed that the uniformly synthesized polymers are seed like. The size of synthesized nanoparticles was observed to be about 50–120 nm. The effect of the number of iterative filtration and the height of the filter on improving the quality of the waste water was investigated using central composite design. After filtration, spectroscopy method, gas chromatography method, and some other devices such as biochemical oxygen demand meter and salt meter were used to evaluate the quality of the waste water. The results indicated that the filter efficiency in optimizing parameters such as total dissolved solids, biochemical oxygen demand, chemical oxygen demand, color, salinity, hardness, pH, and organic compounds removal is desirable. After data modeling, the optimal thickness of the filter was 3.8 cm and the most appropriate iteration for filtration was eight times obtained using a graphical method. Results showed that the designed filter had an excellent ability to improve wastewater quality and can be used in water and wastewater refining instruments.

Adsorption and separation of carbon dioxide and methane on carbonaceous adsorbents

“…It can provide useful information on the interaction between adsorbents and adsorbates and the surface properties and affinity of the adsorbents [20]. There are many common adsorption models, such as Langmuir, Freundlich, Henry model [21][22][23][24]. Langmuir model has been utilized widely due to its simplicity.…”

Zein/EDTA/chlorophyll/nano-clay Biocomposite Sorbent: Investigation Physicochemical Properties Sorbent and Its Ability to Remove Contaminants of Industrial Wastewater

“…Heavy metals accumulate in human adipose tissue, muscle, bone, and joint. General muscle weakness, loss of appetite, nausea, inflammation of the mucous membranes of the eyes, nose and larynx, as well as skin lesions, reproductive problems, mental and neurological disorders and heart disease are the complications of exposure to heavy metals [3][4][5][6]. Nitrate is the most oxidizing form of nitrogen found in natural systems.…”

“…Fig 6. Three-dimensional columnar curves of the effect of biosorbent type and ultrasound on BOD, COD, TDS and salinity of industrial wastewater…”

Synthesis Fe3O4/Talc nanocomposite by coprecipition-ultrasonication method and advances in hexavalent chromium removal from aqueous solution

“…IARC has classified chromium (VI) as carcinogenic (Group 1) and chromium (III) as noncarcinogen (Group 3) (WHO, 2003). There are many methods that used generally to remove chromium and other heavy metal from water (Mahmoodi et al., 2019; Mostafavi et al., 2019), such as adsorption (Chávez-Guajardo et al., 2015; Deveci and Kar, 2013), filtration (Gherasim et al., 2011; Jayalakshmi et al., 2012), precipitation [(Golbaz et al., 2014), ion exchang (Alvarado et al., 2013; Kalantari et al., 2014), electrochemical treatment (Malkoc et al., 2006). In recent years, nanotechnology is a practical approach in treating wastewaters, too.…”