Advances in application of g–C3N4–based materials for treatment of polluted water and wastewater via activation of oxidants and photoelectrocatalysis: A comprehensive review

The paper summarizes the results of the studies on radiation purification of polluted water and wastewater conducted in the author's laboratory in cooperation with other institutions. The removal of heavy metals (cadmium, lead, chromium and mercury) from water and wastewater, the purification of wastewater from surfactant and petroleum products, molasses distillery slops, municipal wastewater in the aerosol flow, river water from colored natural organic pollutants, wastewater of dyeing complex and paper mill, the decomposition of some dyes, hydrogen peroxide, chlorine-containing organic compounds, formic acid, etc. were investigated in detail. As a rule, electron-beam treatment in combination with ordinary methods (biological, coagulation, adsorption, flotation, etc.) was used. The main attention is paid to the mechanism of purification of the studied systems. The role of redox reactions of primary products of water radiolysis and secondary short-lived species formed from pollutants, formation of precipitates capturing the pollutants etc. is discussed.

Download Full-text

Poly‐and perfluoroalkyl substances in water and wastewater: A comprehensive review from sources to remediation

Journal of Water Process Engineering ◽

10.1016/j.jwpe.2020.101393 ◽

2020 ◽

Vol 36 ◽

pp. 101393 ◽

Cited By ~ 5

Author(s):

Hoang Nhat Phong Vo ◽

Huu Hao Ngo ◽

Wenshan Guo ◽

Thi Minh Hong Nguyen ◽

Jianxin Li ◽

...

Keyword(s):

Perfluoroalkyl Substances ◽

Comprehensive Review ◽

Water And Wastewater

Download Full-text

Regeneration of Calcium Alginate and Chitosan Coated Calcium Alginate Sorbents to be Reused for Lead (II) Removal from Aqueous Solutions

Revista de Chimie ◽

10.37358/rc.17.9.5808 ◽

2017 ◽

Vol 68 (9) ◽

pp. 1992-1996 ◽

Cited By ~ 1

Author(s):

Noor Edin Mousa ◽

Claudia Maria Simonescu ◽

Rodica Elena Patescu ◽

Vasile Lavric ◽

Daniela C. Culita

Keyword(s):

Sorption Capacity ◽

Calcium Alginate ◽

Environmental Remediation ◽

High Selectivity ◽

Research Study ◽

Polluted Water ◽

Chemical Methods ◽

Fundamental Properties ◽

Water And Wastewater ◽

Physical And Chemical

The application of biopolymer-based sorbents in solving some environmental problems such as the removal and recovery of heavy metals from natural polluted water and wastewater has received lately a lot of attention due to their unique characteristics. The fundamental properties that recommend the usage of biopolymers-based sorbents for environmental remediation are: high selectivity and sorption capacity, renewability, safe manipulation, sorption capacity increase through simple physical and chemical methods, easy separation from treated water, and easy regeneration and reuse for repetitive sorption-desorption cycles. Accordingly, this research study has as purpose to present the results related to the usage of two types of alginate sorbents (calcium alginate and chitosan coated calcium alginate) in four repetitive lead(II) ions sorption-desorption cycles and to examine the influence of desorption agents on structural sorbent�s characteristics. The results obtained showed that both calcium alginate and chitosan coated calcium alginate are good stable sorbents to be used in lead(II) ions sorption-desorption cycles.

Download Full-text

Enzyme-based control of membrane biofouling for water and wastewater purification: A comprehensive review

Environmental Technology & Innovation ◽

10.1016/j.eti.2021.102106 ◽

2021 ◽

pp. 102106

Author(s):

Karolina Bachosz ◽

Minh T. Vu ◽

Long D. Nghiem ◽

Jakub Zdarta ◽

Luong N. Nguyen ◽

...

Keyword(s):

Wastewater Purification ◽

Comprehensive Review ◽

Membrane Biofouling ◽

Water And Wastewater

Download Full-text

Utilization of Calcined Gypsum in Water and Wastewater Treatment: Removal of Ibuprofen

JORDANIAN JOURNAL OF ENGINEERING AND CHEMICAL INDUSTRIES (JJECI) ◽

10.48103/jjeci1102018 ◽

2018 ◽

Vol 1 (2) ◽

pp. 78-83

Author(s):

Aiman Al-Rawajfeh

Keyword(s):

Setting Time ◽

Polluted Water ◽

Water And Wastewater Treatment ◽

First Order ◽

First Order Kinetics ◽

Study Results ◽

Water And Wastewater ◽

Percentage Removal ◽

Calcined Gypsum ◽

Micro Pollutants

Adsorption is a widely used technique for the removal of pharmaceutical organic micro-pollutants. In this article, calcined gypsum (CaSO4.0.5H2O) was utilized for the removal of ibuprofen medicine from polluted water. Several factors including the adsorbent dose, contact time, and temperature were studied. The influence of the ions in the solution on the precipitation of gypsum and its setting time was investigated because it significantly affects the percentage removal. The fast the setting time gypsum, the lower the percentage removal precipitate. From thermodynamic parameters, the negative values of ΔGo indicated a spontaneous and physisorption of ibuprofen onto the calcined gypsum surface. Kinetic study results showed that the adsorption of ibuprofen on gypsum follows pseudo-first-order kinetics.

Download Full-text

Removal of 4-chlorophenol from polluted water by aluminum–iron alloys

Water Science & Technology ◽

10.2166/wst.2019.349 ◽

2019 ◽

Vol 80 (6) ◽

pp. 1099-1106

Author(s):

Shangze Wu ◽

Ka Tang ◽

Jingqi Zhang ◽

Xi Chen ◽

Hanjun Hu ◽

...

Keyword(s):

Chemical Degradation ◽

Polluted Water ◽

Biological Degradation ◽

Mass Ratio ◽

Wastewater Remediation ◽

Promising Strategy ◽

Initial Ph ◽

Aeration Conditions ◽

Water And Wastewater ◽

In The Beginning

Abstract Chlorophenols are extremely toxic to the environment and recalcitrant to biological degradation. Herein chemical degradation of 4-chlorophenol (4-CP) from aqueous solutions by zero-valent aluminum (Al), zero-valent iron (Fe), Al and Fe mixtures (Al/Fe mass ratio 90/10, labeled as Al/Fe10) and Al-Fe alloy (Al/Fe mass ratio 90/10, labeled as Al-Fe10) were investigated. No removal was found for 50 mg·L−1 4-CP under anoxic conditions at initial pH 2.5 during a period of 10 hrs while 56%, 83%, 78% and 99% of 4-CP were removed by Fe, Al, Al/Fe10 and Al-Fe10, respectively under aeration conditions. The removal of 4-CP by Al/Fe10 mixtures was primarily in the Fe mode in the beginning 4 h and then transitioned to the Al mode. The removal of 4-CP by Al-Fe10 alloy was accomplished via two intermediate products, hydroquinone (HQ) and 4-chlorocatechol (4-CC), and it was speculated that reactive oxygen species and hydroxyl radicals (·OH) play an important role in the degradation of 4-CP and that Al-Fe intermetallic compounds might catalyze the reactions. This study demonstrates that alloying Al with Fe offers a promising strategy for developing new materials for water and wastewater remediation.

Download Full-text