Azhan Ahmad

• Research scholar
• Indian Institute of Technology Kharagpur

The application of hybrid advanced oxidation processes (AOPs) is an efficacious way to remediate emerging contaminants from wastewater. In the present research work, a hybrid electrochemical oxidation and ultraviolet light–based persulfate activation processes (EO-UV/PS) were used to efficiently degrade sodium dodecyl sulfate (SDS) surfactant from...

A batch-scale electro-Fenton (EF) process was performed using graphite anode and waste battery-based Fe–Mn–Zn/C electrocatalyst coated on low-cost graphite felt cathode. The effectiveness of the EF's performance was evident with around 83.9 ± 4.1% removal of 20 mg/L of sodium-dodecyl sulfate surfactant (SDS) at an optimum current density (CD) of 5....

The present investigation demonstrates the effectiveness of a novel Zn-Al@HC photocatalyst supported by anaerobically digested food waste-derived hydrochar (HC) for the photocatalytic activation of persulphate (PS) and abatement of salicylic...

Developing efficient Fenton catalysts for the remediation of emerging pollutants is one of the challenges for researchers. Herein, a novel cathode catalyst via the utilization of waste electro-coagulated (ECO) sludge...

Trace organic contaminants like pharmaceuticals, pesticides, surfactants, and phenolic compounds impose a threat to human health as well as aquatic plants and animals. A significant source of these contaminants entering the aquatic ecosystem is through the discharge of sewage from households, veterinary, agricultural runoff, pharmaceutical industri...

The adaptation of unscientific waste management and improper discharge of effluent from pharmaceutical industry has led to the frequent occurrence of emerging contaminants in the environment. One such contaminant is salicylic acid, which is an anti-inflammatory drug and is highly toxic towards the aquatic environment. In order to treat salicylic ac...

The present investigation demonstrates a batch electrocoagulation (EC) process performance for the abatement of salicylic acid−laden wastewater. The electro−charge loading optimization was assessed using response surface methodology (RSM) with a central composite design (CCD) model. The EC at an optimum electro−charge loading of 20.69 F m −3 in the...

Ethylene glycol or 1,2-ethanediol (EG) is a persistent and toxic substance in the environment and extensively applied in petrochemical, surfactants, antifreeze, asphalt emulsion paints, cosmetics, plastics, and polyester fiber industries. Degradation of EG by using ultraviolet (UV) activated hydrogen peroxide (H2O2) and persulfate (PS) or persulfat...

The intensification of industrial activities and urbanization have significantly increased the discharge of huge amount of toxic and recalcitrant pollutants into the water bodies. Among these, persistent organic pollutants (POPs) are considered highly toxic to aquatic ecosystem as well as human and animals due to their pervasive and bio-accumulativ...

Over the last few years, mitigation of global warming has become a challenge for researchers. Therefore, CO2 conversion into energy-rich valuables and fuels can become a crucial strategy for abating the growing global CO2 emission. However, the CO2 molecule is highly stable, which requires large over potential for converting it to valuable chemical...

The current research demonstrates the efficiency of a low-cost MIL-53(Fe)-metal-organic framework (MOF) derived Fe3O4@C (MIL-53(Fe)@Fe3O4@C) electrocatalyst in a batch-scale electro-Fenton (EF) process for the degradation of salicylic acid (SA) from wastewater. The electrocatalyst was prepared from the combination of polyethylene terephthalate (PET...

Performance of a batch electrocoagulation/floatation (ECF) setup using punched aluminium electrodes for the remediation of salicylic acid in the presence of cetyl-trimethyl ammonium bromide (CTAB) surfactant is evaluated in this research. The operational parameters of ECF technology were optimized in this research and based on the optimized operati...

Persistent organic pollutants (POPs) like pharmaceuticals, personal care products, pesticides and surfactants are found at trace environmental concentrations and possess high toxicity toward aquatic and human life. Thus, it is essential to remove POPs from wastewater before it is discharged into the receiving water bodies. Conventional treatment te...

The ECs like antibiotics, personal care products, surfactants, herbicides and pesticides are frequently detected in trace concentrations and are not effectively removed through traditional wastewater treatment systems; hence, developing a suitable treatment system for the remediation of ECs is the need of the hour. In this regard, the present revie...

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...

Bioelectrochemical systems (BESs) are a unique group of wastewater remediating technology that possesses the added advantage of valuable recovery with concomitant wastewater treatment. Moreover, due to the application of robust microbial biocatalysts in BESs, effective removal of emerging contaminants can be accomplished in these BESs. Thus, this r...

The presence of emerging pollutants in the environment can pose potential risks to the natural ecosystem. Thus, the efficacious removal of emerging pollutants, like pharmaceuticals from wastewater have recently been a major area of concern for the researchers; since, these biorefractory compounds can bio-accumulate in living beings and can also tra...

Petrochemical industry is one of the major and rapidly growing industry that generates a variety of toxic and recalcitrant organic pollutants as by-products, which are not only harmful to the aquatic animals but also affects human health. The majority of the components of petrochemical wastewater (PW) are carcinogenic, genotoxic and phytotoxic in n...

Microbial fuel cell (MFC) is a type of bio-electrochemical system, which harvests bioelectricity by oxidizing the organic material present in the wastewater. Performance of a MFC relies on the both anodic and cathodic reaction kinetics. The oxygen reduction reaction (ORR) occurring on the cathode is a sluggish reaction, which majorly diminishes the...

Xenobiotics are newly identified contaminants, recently discovered to be present in the environment and possessing potential threat to different components of the ecosystems due to their inherent toxicity and endocrine-disrupting nature. Moreover, due to their recalcitrant nature, these emerging contaminants are not effectively removed by existing...

Xenobiotics are man-made, non-biodegradable compounds present in the environment at higher concentrations than usual. Phenols, dyes, surfactants, pesticides, pharmaceuticals are some of the xenobiotics. These pollutants have an adverse effect on the environment because of their toxicity, complex structure and carcinogenic nature and are not efficie...

Urine is not a waste but can be a raw source for struvite(MgNH4PO4.6H2O ),which can be used as a substitute of fertilizer, since direct usage of urine have demerits such as it is not easy to store large quantity of urine at a place prior to use, it is also not economic to transport collected urine in large volumes, it will have some soil-nutrient i...