Water treatment residuals containing iron and manganese oxides for arsenic removal from water – Characterization of physicochemical properties and adsorption studies

2016 ◽  
Vol 294 ◽  
pp. 210-221 ◽  
Author(s):  
Daniel Ociński ◽  
Irena Jacukowicz-Sobala ◽  
Piotr Mazur ◽  
Jerzy Raczyk ◽  
Elżbieta Kociołek-Balawejder
Keyword(s):  
Water Treatment ◽  
Physicochemical Properties ◽  
Manganese Oxides ◽  
Arsenic Removal ◽  
Water Treatment Residuals ◽  
Adsorption Studies ◽  
Iron And Manganese

scholarly journals Characterization and Arsenic Adsorption Behaviors of Water Treatment Residuals from Waterworks for Iron and Manganese Removal

2019 ◽  
Vol 16 (24) ◽  
pp. 4912 ◽  
Author(s):  
Huiping Zeng ◽  
Tongda Qiao ◽  
Yunxin Zhao ◽  
Yaping Yu ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Water Treatment ◽  
Arsenic Removal ◽  
Treatment Plant ◽  
Structural Features ◽  
Water Treatment Residuals ◽  
Arsenic Adsorption ◽  
Isotherm Equation ◽  
Manganese Removal ◽  
Iron And Manganese

Water treatment residuals (WTRs), obtained from a groundwater treatment plant for biological iron and manganese removal, were investigated and used as adsorbents for arsenic removal. The surface morphology and structural features of the WTRs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Brunauner–Emmett–Teller analysis (BET). Laboratory experiments were also carried out to test the adsorption capability and adaptability of WTRs on both As (III) and As (V) removal from the water. The results showed that the WTRs were mainly amorphous and had a large specific surface area of 253.152 m2/g. The maximum adsorption capacities, evaluated using the Langmuir isotherm equation, were 36.53 mg/g and 40.37 mg/g for As (III) and As (V), respectively. The pseudo-second-order model fitted the kinetic data better, with R2 more than 0.99 for both As (III) and As (V). The removal of As (V) decreased with the increase in pH, especially when the pH was above 9, whereas for As (III), the removal effectiveness almost remained constant at both acidic and neutral pHs. H2PO4− and SiO32− could strongly inhibit arsenic adsorption onto the WTRs, and the effect of other ions was little.

Monitoring of a pilot GFO filter for removal of low-concentration arsenic in water

2016 ◽  
Vol 11 (4) ◽  
pp. 702-711 ◽  
Author(s):  
Collivignarelli Maria Cristina ◽  
Canato Matteo ◽  
Sorlini Sabrina ◽  
Crotti Barbara Marianna
Keyword(s):  
Water Treatment ◽  
Ferric Oxide ◽  
Arsenic Removal ◽  
Arsenic Concentration ◽  
Specific Treatment ◽  
Cost Effective ◽  
Water Treatment Plants ◽  
Groundwater Arsenic ◽  
Treatment Stage ◽  
Iron And Manganese

Many water treatment plants (WTPs) were designed to remove ammonia, iron, and manganese simultaneously using biofilters. In some cases (especially in the Pianura Padana area, in Italy) such plants were designed without a specific treatment stage for arsenic removal because its concentration in the groundwater (i.e. 10 to 20 μg/L) was lower than the previous maximum contaminant level (MCL) of 50 μg-As/L; therefore, specific treatments for arsenic removal must be introduced or upgraded in WTPs. In this work, the results of a 19-month monitoring campaign are reported for a pilot granular ferric oxide (GFO) filter installed in an Italian WTP as a polishing stage. The aim was to investigate the performance of GFO with low arsenic concentrations. The results show that, if the groundwater arsenic concentration is close to the MCL, GFO treatment can be cost effective (approximately 80,000 bed volumes have been treated). It was confirmed that GFO can be effective for the removal of both As(III) and As(V) species.

Physicochemical Properties Related to Long-Term Phosphorus Retention by Drinking-Water Treatment Residuals

2005 ◽  
Vol 39 (11) ◽  
pp. 4280-4289 ◽  
Author(s):  
Konstantinos C. Makris ◽  
Willie G. Harris ◽  
George A. O'Connor ◽  
Thomas A. Obreza ◽  
Herschel A. Elliott
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Physicochemical Properties ◽  
Drinking Water Treatment ◽  
Phosphorus Retention ◽  
Water Treatment Residuals ◽  
Drinking Water Treatment Residuals

Optimization of Arsenic Removal Water Treatment System through Characterization of Terminal Electron Accepting Processes

2012 ◽  
Vol 46 (21) ◽  
pp. 11702-11709 ◽  
Author(s):  
Giridhar Upadhyaya ◽  
Tara M. Clancy ◽  
Jess Brown ◽  
Kim F. Hayes ◽  
Lutgarde Raskin
Keyword(s):  
Water Treatment ◽  
Arsenic Removal ◽  
Treatment System ◽  
Water Treatment System
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