Rishabh Raj

Indian Institute of Technology Kharagpur | IIT KGP · School of Environmental Science and Engineering

The presence of refractory micropollutants in natural waters poses significant environmental and health risks. Preferably, advanced oxidation techniques like electro-Fenton (EF) and bio-electro-Fenton (BEF) are used to mitigate micropollutants; nevertheless, their field-scale implementation is limited by prohibitive catalyst cost. As an alternative...

There is currently a critical gap in knowledge regarding the application of microbial electrochemical technologies (METs) in industrial wastewater treatment and resource recovery. Resource Recovery from Industrial Wastewater through Microbial Electrochemical Technologies fills this gap by offering a comprehensive guide for researchers, students, an...

Successful pilot-scale operation and commercialisation are critical benchmarks in the development of advanced biological and hybrid technologies. The most challenging issue at the pilot-level operation is performance drop, which is usually inversely proportional to the reactor size. In view of the aforementioned constraints, this chapter aims to el...

Heterogenous electro-Fenton (H-EF)-based technologies are incredibly potent in mitigating recalcitrant emerging contaminants from different wastewater matrices. The H-EF process facilitate Fenton’s oxidation at circumneutral pH and also enable catalyst recycling. However, heterogeneous solid catalysts are often synthesised from expensive and virgin...

Incessant industrialization, unconstrained urbanization, and an environmentally unsustainable lifestyle have exacerbated the unwarranted release of emerging contaminants (ECs) into aquatic ecosystems across the globe. Depending on their source of origin, ECs encompass a range of pollutants, including pharmaceuticals and personal care products, pest...

Discharge of endocrine-disrupting compounds such as methylparaben (MePa) into natural water bodies deteriorates the aquatic ecosystem. In this regard, electrochemical oxidation (EO) and electro-Fenton (EF) processes are acknowledged as effective methods to eliminate biorecalcitrant compounds from different wastewater matrices. In these systems, the...

The remediation of emerging contaminants (ECs) of concern, such as personal care products, antibiotics, endocrine-disrupting chemicals (EDCs), surfactants, pesticides, etc., is the need of the hour. Conventional wastewater treatment technologies such as activated sludge process, trickling filter, constructed wetlands, coagulation and flocculation,...

Discharge of emerging contaminants such as parabens in natural water bodies is a grievous concern. Among parabens, methylparaben (MP) is most prevalent due to its extensive usage in personal care and food products and has been purported to trigger hormonal-related diseases. In this regard, the bio-electro-Fenton (BEF) process garners attention for...

Calcium hydroxyapatite (HAp) is a naturally occurring material in bones of humans and calcareous animals. In the biomedical field, HAp has been extensively used due to their high biocompatibility and non-toxicity. These properties of HAp coupled with high surface area and adsorption capacity have prompted its application in wastewater remediation....

Microbial fuel cells (MFCs) have been the prime focus of research in recent years because of their distinctive feature of concomitantly treating and producing electricity from wastewater. Nevertheless, the electrical performance of MFCs is hindered by a protracted oxygen reduction reaction (ORR), and often a catalyst is required to boost the cathod...

Microbial fuel cells (MFCs) have gained considerable importance for the production of bioelectricity and other value-added products recovery along with the concomitant treatment of wastewater. However, the poor power output of MFC as a result of sluggish oxygen reduction reaction (ORR) remains one of the major setbacks of this green technology. App...

Third-generation biodiesel produced using carbon-neutral algal feedstock is a promising alternative to meet global energy demands. However, the economic viability of algae-derived biodiesel is severely impacted by poor lipid recovery...

The emission of CO2 from industrial (24%) and different anthropogenic activities, like transportation (27%), electricity production (25%), and agriculture (11%), can lead to global warming, which in the long term can trigger substantial climate changes. In this regard, CO2 sequestration and wastewater treatment in tandem with bioenergy production t...

Endocrine disrupting compounds (EDCs) are a class of emerging contaminants capable of interfering with the normal hormonal functioning of humans and other organisms. Even minute concentrations of EDCs in natural receiving water bodies can be minacious and are raising concern globally due to their connection with rising cases in reproductive, immune...

The discharge of emerging pollutants, such as beta-blockers (BB) has been recognized as one of the major threats to the environment due to the ecotoxicity associated with these emerging pollutants. The BB are prescribed to treat high blood pressure and cardiovascular diseases; however, even at lower concentration, these pollutants can pose eco-toxi...

With the plausible depletion of fossil fuels in the near future and its associated environmental impacts, researchers have instigated the search for eco-friendly renewable bioenergy. Moreover, the increase in water pollution by industrial and anthropogenic activities is another alarming global concern. In this regard, the production of renewable an...

Caffeine is one of the most widely detected and reported emerging contaminant in wastewater, groundwater as well as fresh and marine water bodies owing to its massive consumption, which has led to the bioaccumulation of caffeine in different aquatic environment. Hazardous effects of caffeine have been reported on aquatic biota, coral reefs, soil an...

Dealing with psycho-social aspects of rural groups for building toilets and make them utilize is a tedious task. The vivid aspects leading to open defecation and in order to find solutions for eradicating the same is being concentrated which is more likely prevailing in rural India. The survey was carried out in various villages of India to check t...