scholarly journals Nanocellulose and Polycaprolactone Nanospun Composite Membranes and Their Potential for the Removal of Pollutants from Water

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 683
Author(s):  
Hasbleidy Palacios Hinestroza ◽  
Hilary Urena-Saborio ◽  
Florentina Zurita ◽  
Aida Alejandra Guerrero de León ◽  
Gunasekaran Sundaram ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heavy Metal ◽  
Metal Removal ◽  
Tap Water ◽  
Cellulose Nanofibers ◽  
Heavy Metal Removal ◽  
Composite Membranes ◽  
Added Value ◽  
Turbidity Removal ◽  
Filtration System

A composite membrane based on polycaprolactone (PCL) and cellulose nanofibers (CNF) with different compositions was prepared using the electro-spinning method, with the objective of developing organic membranes with good mechanical properties to remove contaminants from water. Water is a resource of primary importance for life and human activities. In this sense, cellulose obtained from agave bagasse and polycaprolactone nanofibers was used to prepare membranes that were tested by filtering tap water. The membranes obtained presented a porosity and structure on a nanometric scale. The water quality variables evaluated after filtration with the PCL/CNF membranes showed 100% turbidity removal, 100% conductivity, and heavy metal removal of the order of 75% to 99% for iron and chromium. CNF comprises biowaste derived from tequila production, and it has added value. Electro-spun CNF and PCL membranes can be applied as a “green” and eco-friendly filtration system for water purification.

Pollutant removal efficiency of alternative filtration media in stormwater treatment

2006 ◽  
Vol 54 (6-7) ◽  
pp. 299-305 ◽  
Author(s):  
N. Seelsaen ◽  
R. McLaughlan ◽  
S. Moore ◽  
J.E. Ball ◽  
R.M. Stuetz
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Wood Ash ◽  
Pollutant Removal ◽  
Added Value ◽  
Metal Contaminants ◽  
High Concentration ◽  
Recycled Glass

Sorption experiments were used to assess the ability of various materials (sand, compost, packing wood, ash, zeolite, recycled glass and Enviro-media) to remove heavy metal contaminants typically found in stormwater. Compost was found to have the best physicochemical properties for sorption of metal ions (Cu, Zn and Pb) compared with sand, packing wood, ash, zeolite and Enviro-media. The compost sorption of these metal ions conformed to the linear form of the Langmuir adsorption equation with the Langmuir constants (qm) for Zn(II) being 11.2 mg/g at pH 5. However, compost was also found to leach a high concentration of dissolved organic carbon (DOC, 4.31 mg/g), compared with the other tested materials. Various combinations of sand, compost and other materials were observed to have excellent heavy metal removal (75–96% of Zn and 90–93% of Cu), with minimal DOC leaching (0.0013–2.43 mg/g). The sorption efficiency of the different Enviro-media mixes showed that a combination of traditional (sand) and alternative materials can be used as an effective medium for the treatment of dissolved metal contaminants commonly found in stormwater. The application of using recycled organic materials and other waste materials (such as recycled glass) also provides added value to the products life cycle.

Residual heavy metal removal by an algae-intermittent sand filtration system

1979 ◽  
Vol 13 (3) ◽  
pp. 305-313 ◽  
Author(s):  
D FILIP ◽  
V THOMASPETERS ◽  
E DEANADAMS ◽  
J MIDDLEBROOKS
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Sand Filtration ◽  
Filtration System

Preparation of PVdF/GO Nanofiber Composite Membranes and its Heavy Metal Removal Characteristics

Polymer Korea ◽  
2016 ◽  
Vol 40 (3) ◽  
pp. 489 ◽  
Author(s):  
Hwak-Yung Jeong ◽  
Won-Gi Jang ◽  
Jae-Han Yun ◽  
Hong-Sik Byun
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Composite Membranes ◽  
Nanofiber Composite

scholarly journals Removal of Heavy Metals from Wastewater Using Novel Polydopamine-Modified CNTs-Based Composite Membranes

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2120
Author(s):  
Faizah Altaf ◽  
Shakeel Ahmed ◽  
Muhammad Usman ◽  
Tahira Batool ◽  
Jaweria Shamshad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Composite Membranes ◽  
Low Concentrations ◽  
Removal Of Heavy Metals ◽  
Removal Efficiencies ◽  
Immense Potential ◽  
Maximum Removal

The presence of major heavy metals including Pb2+, Cu2+, Co2+, Ni2+, Hg2+, Cr6+, Cd2+, and Zn2+ in water is of great concern because they cannot degrade or be destroyed. They are toxic even at very low concentrations. Therefore, it is necessary to remove such toxicants from water. In the current study, polydopamine carbon nanotubes (PD-CNTs) and polysulfone (PS) composite membranes were prepared. The structural and morphological features of the prepared PDCN composite membranes were studied using FTIR, XRD, SEM, and EDS. The potential application of PDCNs for heavy metal removal was studied for the removal of Pb2+, Cr6+, and Cd2+ from wastewater. The maximum removal efficiency of 96.1% was obtained for Cr6+ at 2.6 pH using a composite membrane containing 1.0% PD-CNTs. The removal efficiencies decreased by 64.1 and 73.4, respectively, by enhancing the pressure from 0.50 up to 0.85 MPa. Under the same circumstances, the percentages of Pb+2 removal at 0.49 bar by the PDCNS membranes containing 0.5% and 1.0% PD-CNT were 70 and 90.3, respectively, and decreased to 54.3 and 57.0, respectively, upon increasing the pressure to 0.85 MPa. The results showed that PDCNS membranes have immense potential for the removal of heavy metals from water.

scholarly journals Fabrication of chelating diethylenetriaminated pan micro and nano fibers for heavy metal removal

2012 ◽  
Vol 18 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Majid Abdouss ◽  
Mousavi Shoushtari ◽  
Aminoddin Haji ◽  
Behnam Moshref
Keyword(s):  
Mechanical Properties ◽  
Heavy Metal ◽  
Ftir Spectroscopy ◽  
Process Parameters ◽  
Metal Removal ◽  
Aqueous Media ◽  
Heavy Metal Removal ◽  
Metal Chelating ◽  
Acrylic Fibers ◽  
Tga Analysis

In this study, commercial acrylic fibers were modified with diethylenetriamine to prepare metal chelating fibers. The effects of process parameters on the efficiency of the reaction were investigated. FTIR spectroscopy and TGA analysis were used to confirm the chemical changes made to the fibers during the reaction. The ability of the modified fibers for removal of Pb (II), Cu (II) and Ce (IV) ions from aqueous media was determined. The modified fibers showed a slight decrease in mechanical properties compared to raw ones. Furthermore, the acrylic micro fibers were electrospun to nanofibers and the ability of modified nanofibers for the adsorption of the metal ions was studied.

scholarly journals Biosand Filter (BSF): Types and Mechanisms behind Its Efficiency

2016 ◽  
pp. 87-102 ◽  
Author(s):  
Dao Janjaroen
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Developed Countries ◽  
Biosand Filter ◽  
Point Of Use ◽  
Filtration System ◽  
The World ◽  
Biological Contaminants

More than 760 million people around the world lack access to clean drinking water. A biosand filter was developed through the collaboration of research groups in developing and developed countries. This type of filter is considered a point-of-use filtration system that can be easily in-stalled at home, and has shown promising results. Thousands of these filters have been distributed and are currently in use in developing countries around the world, helping to alleviate poor water quality conditions. Although these filters have been proven to improve water quality in terms of biological contaminants, there are still concerns over their ability to remove heavy metal conta-minants. This review will outline basic and current research that may pave the way for BSF improvement in terms of heavy metal removal from groundwater.

Sign in / Sign up

Export Citation Format

Share Document