Immoblization of Thiol-Functionalized Nanosilica on the Surface of Poly(ether sulfone) Membranes for the Removal of Heavy-Metal Ions from Industrial Wastewater Samples

2014 ◽  
Vol 54 (1) ◽  
pp. 502-513 ◽  
Author(s):  
Ahmad Rezvani-Boroujeni ◽  
Mehran Javanbakht ◽  
Mohammad Karimi ◽  
Cyrous Shahrjerdi ◽  
Behrouz Akbari-adergani
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Wastewater Samples

scholarly journals MICROBIOLOGICAL AND SANITARY - CHEMICAL CHARACTERISTICS OF WASTEWATER FROM PHARMACEUTICAL COMPANY

2021 ◽  
pp. 40-53
Author(s):  
T. V. Gudzenko ◽  
O. G. Gorshkova ◽  
O. V. Voliuvach ◽  
T. V. Burlaka ◽  
I. P. Metelitsina
Keyword(s):  
Heavy Metal ◽  
Chemical Analysis ◽  
Klebsiella Pneumoniae ◽  
Metal Ions ◽  
Pharmaceutical Company ◽  
Heavy Metal Ions ◽  
Pathogenic Bacteria ◽  
Anionic Surfactants ◽  
Photometric Method ◽  
Wastewater Samples

Aim. Оssessment of wastewater from a pharmaceutical company according to sanitary-microbiological and chemical indicators to determine the method of treatment and remediation of them from pollutants and pathogens. Methods. In sanitary and bacteriological studies, classical microbiological methods were used to determine the total microbial number of pathogenic bacteria. Determination of the concentration of ammonium, nitrite and nitrate in wastewater samples from a pharmaceutical company was carried out spectrophotometrically using the chemical reaction of ions to Nessler's reagent, Griss reagent, and phenol sulfide acid. The content of heavy metal ions was determined by the method of electrothermal AAS using the device "Saturn-2", by the photometric method using 4-aminoantipyrine – phenol, by the extraction-photometric method – by surfactants, by the method of infrared spectrometry – by petroleum hydrocarbons. Results. It was experimentally confirmed that the total microbial count in wastewater samples from a pharmaceutical company slightly exceeded the standard value. The BGKP index and the E. coli index were within the normal range. The pathogenic bacteria Salmonella moscow and Klebsiella pneumoniae were found in the wastewater of pharmaceutical company. The contamination of pharmaceutical stock can be judged by the 8.5 times excess of the concentration of ammonium ions in them compared to the MPC. The results of chemical analysis of wastewater samples from a pharmaceutical company indicate their multicomponent composition.Of the heavy metal ions, ions of zinc, copper, lead, hexavalent chromium and cadmium were mainly detected. With the exception of cadmium ions, the concentration of heavy metal ions was 1.4–7.2 times higher than the MPC norm. Anionic surfactants predominated in pharmaceutical stocks – their concentration was 8.2 ± 0.7 mg/dm3. The level of phenolic and oil pollution of wastewater was minimal in comparison with the content of anionic surfactants, which could be caused by the activity of aboriginal strains of bacteria-destructors with a high phenolic capacity. Conclusion. The results of sanitary-microbiological and chemical analysis of wastewaters of a pharmaceutical company indicate their multicomponent nature and environmental hazard – they contain pathogenic bacteria Salmonella moscow and Klebsiella pneumoniae and pollutants of various nature: heavy metal ions Cu (II), Cr (VI) and Pb (II) at a concentration of 36.0 ± 14 μg/dm3, 3.0 ± 0.4 μg/dm3 and 14.0 ± 0.7 μg/dm3, respectively, and organic pollutants – phenol, oil products and anionic surfactants at a concentration of 0.003 ± 0.0006 mg/dm3, 0.81 ± 0.05 mg/dm3 and 8.2 ± 0.7 mg/dm3, respectively. Werecommend to carry out a comprehensive purification of wastewater from a pharmaceutical company from phenol, heavy metal ions [Cu (II), Cr (VI), Zn (II)], oil products, anionic surfactants and pathogens.

The adsorption of divalent heavy metal ions on (8,0) carbon nanotubes: The first-principles study

2020 ◽  
Vol 34 (32) ◽  
pp. 2050368
Author(s):  
Z. Zhu ◽  
L. An ◽  
T. Chen ◽  
X. Jia
Keyword(s):  
Carbon Nanotubes ◽  
Heavy Metal ◽  
Metal Ions ◽  
First Principles ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Density Functional ◽  
Physical Adsorption ◽  
Functional Theory ◽  
Sensing Material

In order to explore new ways to detect and remove heavy metal ions from industrial wastewater, the first-principles method based on density functional theory has been used to investigate the performance of carbon nanotubes (CNTs) in adsorbing divalent heavy metal ions which include Zn[Formula: see text], Cu[Formula: see text], Pb[Formula: see text] and Sn[Formula: see text]. Results show that the adsorption of Zn[Formula: see text] on CNTs is weak and only physical adsorption forms between them. However, for Cu[Formula: see text], Pb[Formula: see text] and Sn[Formula: see text], the final adsorption distance with CNTs is greatly decreased, and the adsorption energy and charge transfer amount with CNTs are significantly increased. In addition, the charge density of Cu[Formula: see text], Pb[Formula: see text] and Sn[Formula: see text] overlaps effectively with that of CNTs. These indicate the formation of strong chemisorption between these ions and CNTs. Therefore, CNTs could be used as a sensing material to detect and remove Cu[Formula: see text], Pb[Formula: see text] and Sn[Formula: see text] from wastewater. The research provides theoretical guidance for the application of CNTs in heavy metal ions treatment.

Heavy metal ions adsorption from dairy industrial wastewater using activated carbon from milk bush kernel shell

2015 ◽  
Vol 57 (31) ◽  
pp. 14565-14577 ◽  
Author(s):  
Tinuade J. Afolabi ◽  
Abass O. Alade ◽  
Monsurat O. Jimoh ◽  
Isaiah O. Fashola
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Industrial Wastewater ◽  
Heavy Metal Ions

scholarly journals Banana Rachis CNC/Clay Composite Filter for Dye and Heavy Metals Adsorption from Industrial Wastewater

2021 ◽  
pp. 44-56
Author(s):  
Md. Monjurul Islam ◽  
Md. Shafiqul Islam ◽  
Mohd. Maniruzzaman ◽  
Md. Minhaz-Ul Haque ◽  
Anika Amir Mohana
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Cellulose Nanocrystals ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Dye Adsorption ◽  
Before And After ◽  
Composite Filter ◽  
Hydrolysis Of ◽  
Adsorption Capability

This study demonstrates a successful processing and utilization of banana rachis cellulose nanocrystals (CNCs) dispersed clay composite filter which is capable of adsorbing dye and heavy metal ions namely Pb(II) and Cr(III) from industrial wastewater. The composite of different compositions was prepared by dispersing the cellulose nanocrystals, obtained by acid hydrolysis of banana rachis fibres, within the tri-ethyl amine treated clay. The CNC and treated clay were characterized by Fourier transform infrared (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM) analyses. Industrial wastewater containing a basic yellow2 dye and two heavy metal ions, Pb(II) and Cr(III), was passed through the prepared filters set in a column. The dye and metal ions adsorption capability of the filters were analyzed by determining the dye and metal ions concentration into the water before and after passing through the composite filter. The concentration of dye and metal ions in water was determined by a UV-visible spectrophotometer and an atomic absorption spectrophotometer, respectively. It was found that the dye adsorption capacity of the composite filters was about 50 mg per gram of composite as well as Pb(II) and Cr(III) ions adsorption capacities of the composite filters were ˃10.0 mg and ˃12.4 mg respectively per gram of the composite when CNC content in the composite was ˃30 wt.%. It was also found that the metal ions adsorption capability of the composite filter was improved with increasing CNC content in the composites.

Coal ash as adsorbent for heavy metal ions in standard solutions, industrial wastewater and streams

2011 ◽  
Vol 11 (1-2) ◽  
pp. 129-132 ◽  
Author(s):  
Majlinda N. Daci ◽  
Nexhat M. Daci ◽  
Lulzim Zeneli ◽  
Salih Gashi ◽  
Dafina Hoxha
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Coal Ash ◽  
Standard Solutions
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