UV and solar light photocatalytic removal of organic contaminants in municipal wastewater

2016 ◽  
Vol 51 (10) ◽  
pp. 1765-1778 ◽  
Author(s):  
Achisa C. Mecha ◽  
Maurice S. Onyango ◽  
Aoyi Ochieng ◽  
Tarek S. Jamil ◽  
Christoffel J. S. Fourie ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Municipal Wastewater ◽  
Solar Light ◽  
Photocatalytic Removal

Artificial Recharge of Groundwater with Reclaimed Municipal Wastewater: Current Status and Proposed Criteria

1992 ◽  
Vol 25 (12) ◽  
pp. 87-92 ◽  
Author(s):  
T. Asano
Keyword(s):  
Water Supply ◽  
Groundwater Recharge ◽  
Organic Contaminants ◽  
Municipal Wastewater ◽  
Artificial Recharge ◽  
Microbial Pathogens ◽  
Current Status ◽  
Water Supply Systems ◽  
Wastewater Reclamation ◽  
Trace Organic Contaminants

Current status and the proposed criteria for artificial recharge of groundwater with reclaimed municipal wastewater are discussed with special reference to controlling microbial pathogens and trace organic contaminants. The draft criteria have been developed by the State of California Interagency Water Reclamation Coordinating Committee, followed by the Groundwater Recharge Committee of the Department of Health Services (DHS). The proposed criteria are in the final review process and are expected to be adopted in late 1992 by the DHS as a part of the revised, state-wide Wastewater Reclamation Criteria. The discussions and the draft criteria presented in this paper facilitate the approval of groundwater recharge projects by identifying the nature and characteristics of groundwater recharge projects that do not jeopardize the public water supply systems including use of groundwater for potable water supply. These criteria are intended to provide uniform state-wide application of regulations on which to regulate and design groundwater recharge projects using reclaimed municipal wastewater as a source of recharge water.

scholarly journals Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals

2021 ◽  
Vol 7 (1) ◽  
pp. 197-211
Author(s):  
Daniel Sauter ◽  
Agata Dąbrowska ◽  
Robert Bloch ◽  
Michael Stapf ◽  
Ulf Miehe ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Organic Contaminants ◽  
Contact Time ◽  
Municipal Wastewater ◽  
Filter Material ◽  
Post Treatment ◽  
Treatment Goals ◽  
Municipal Wastewater Treatment

The removal of organic contaminants during post-treatment with deep-bed filters after ozonation in tertiary municipal wastewater treatment can be optimised by the choice of filter material and contact time.

Sodium Ligninsulfonate-assisted Synthesis of Lithium Bismuthate/bismuth Oxide Microspheres and Solar Light Photocatalytic Performance

2021 ◽  
Vol 13 ◽  
Author(s):  
C.H. Yu ◽  
Y.J. Mao ◽  
Z.Y. Xue ◽  
J.L. Kong ◽  
H.Y. Li ◽  
...  
Keyword(s):  
Waste Water ◽  
Bismuth Oxide ◽  
Photocatalytic Performance ◽  
Diffuse Reflectance Spectrum ◽  
Light Irradiation ◽  
Solar Light ◽  
Hydrothermal Temperature ◽  
Solar Light Irradiation ◽  
Duration Time ◽  
Photocatalytic Removal

Background: Great attention has been paid to the environmental pollution by organic dyes which are difficult to be degraded in natural environment and have been an unavoidable and urgent global problem. It is essential to develop green waste water treatment technology with high removal efficiency and low cost to protect surroundings and human health. Objective: The aim of the research is to synthesize lithium bismuthate/bismuth oxide microspheres with good photocatalytic performance for the removal of gentian violet (GV). Methods: Lithium bismuthate/bismuth oxide microspheres were successfully prepared by a sodium ligninsulfonate-assisted hydrothermal synthesis route. The lithium bismuthate/bismuth oxide microspheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform infrared spectroscopy (FTIR) and solid UV-vis diffuse reflectance spectrum. Results: XRD pattern and SEM observation show that the lithium bismuthate/bismuth oxide microspheres are composed of cubic LiBi12O18.50 and monoclinic Bi2O3 with the diameter of 250 nm-1 μm. Irregular microscale and nanoscale particles are formed under low hydrothermal temperature, low sodium ligninsulfonate concentration and short duration time. With increasing the sodium ligninsulfonate concentration, hydrothermal temperature and duration time, irregular particles are transferred into microspheres. Lithium bismuthate/bismuth oxide microspheres possess a band gap energy of 1.85 eV suggesting good visible light absorption ability. The photocatalytic removal ability for GV is enhanced by prolonging light irradiation time and microspheres dosage. GV solution with the concentration of 10 mg•L-1 is able to be totally degraded by 10 mg lithium bismuthate/bismuth oxide microspheres in 10 mL GV solution under solar light irradiation for 6 h. Conclusion: The lithium bismuthate/bismuth oxide microspheres show good photocatalytic removal ability toward GV in waste water under solar light irradiation.

scholarly journals Stable plasmonic Ag/AgCl–polyaniline photoactive composite for degradation of organic contaminants under solar light

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12726-12736 ◽  
Author(s):  
Hossam A. Ghaly ◽  
Amer S. El-Kalliny ◽  
Tarek A. Gad-Allah ◽  
Nour E. A. Abd El-Sattar ◽  
Eglal R. Souaya
Keyword(s):  
Organic Contaminants ◽  
Reduction Method ◽  
Solar Light ◽  
Precipitation Reaction

A series of novel plasmonic photocatalysts of Ag/AgCl–polyaniline (Ag/AgCl–PANI) were successfully synthesized by deposition–precipitation reaction followed by a photo-reduction method.

Photocatalytic removal of organic contaminants from water exploiting tuned bandgap photocatalysts

Desalination ◽  
2011 ◽  
Vol 275 (1-3) ◽  
pp. 160-165 ◽  
Author(s):  
Rajesh J. Tayade ◽  
H.C. Bajaj ◽  
R.V. Jasra
Keyword(s):  
Organic Contaminants ◽  
Photocatalytic Removal
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