Cost-effective ecofriendly nanoparticles for rapid and efficient indigo carmine dye removal from wastewater: Adsorption equilibrium, kinetics and mechanism

Application of modified water treatment residuals in water and wastewater treatment: A review

“…Developing stable nWTRs from bulk WTRs results in very promising and practical solution to remediate various environmental contaminants by increasing surface area and pore volume by 2–3 times [ 85 ]. Thus, nWTRs due to their smaller size have more active sites resulting in increased sorption capacity up to 30 times compared to powdered raw WTRs [ 84 , 86 , 87 ].…”

“…Also, Fe 3 O 4 @C exhibited good reusability, stability and recyclability with removal efficiency of 72.1% for MB even after five regeneration cycles [ 90 ]. El-Kammah et al [ 86 ] used WTR-based nanoparticles for adsorption of indigo carmine and found that due to the larger availability of active sites, maximum adsorption capacity of nWTRs (172.4 mg/g) was 5.6 times higher than that of the raw WTRs (30.86 mg/g).…”

“…It is reported that dye adsorption on modified WTRs is mainly attributed to electrostatic attraction, π–π interactions, van der Waals forces and, hydrogen bonding. El-Kammah et al [ 86 ] proposed that adsorption of anionic dye, Indigo carmine (IC) to WTR nanoparticles (nWTRs) was governed by three mechanism (a) Electrostatic attractions: Surface hydroxides on nWTRs will become protonated in acidic medium (pH > pH pzc ) and will attract negatively charged IC molecules, (b) Hydrogen bonding: IC molecules contain O and is a strong H donor which releases H. These H interacts with OH on the nWTRs surface and form hydrogen bond, (c) Formation of Al/Fe and IC complexes: Bonding of Al and Fe on nWTRs with nitrogen atoms on IC. Nuanhchamnong et al [ 118 ] studied the interaction of positively charged MB molecules with negatively charged –OH and C–O functional groups on rice husk-biochar WTR composite.…”

Phosphoric acid surface modified Moringa oleifera leaves biochar for the sequestration of methyl orange from aqueous solution: Characterizations, isotherm, and kinetics analysis

“…In recent years, several techniques e.g., chemical (Kumar et al, 2012), electrochemical (Araújo et al, 2014; Droguett et al, 2020; Suhan et al, 2020), biological (Bhatia et al, 2017; Sahoo et al, 2022), adsorption (El‐Kammah et al, 2022; Wong et al, 2020; Yagub et al, 2014), ozonation (Kasiri et al, 2013; Sheydaei et al, 2020), persulfate oxidation (Shuchi et al, 2021), solar/UV photocatalytic processes (Al‐Mamun et al, 2019; Al‐Mamun et al, 2021; Kader et al, 2022; Su et al, 2021) and nano‐based photocatalytic degradation (Akter et al, 2022; Kader et al, 2022; Rashid Al‐Mamun et al, 2022; Znad et al, 2018) have been applied for the treatment of textile wastewaters. Among these processes, the adsorption technique has been shown as one of the most efficient methods for treating wastewaters due to its low cost, availability, easy operation, and energy efficiency (Busetty, 2019; De Gisi et al, 2016).…”

Correlation of Phosphorus Adsorption with Chemical Properties of Aluminum-Based Drinking Water Treatment Residuals Collected from Various Parts of the United States

“…They have been mainly used either as soil amendments to increase their retention capacity and immobilize contaminants, such as arsenic [ 1 ], phosphorus [ 2 ], vanadium [ 3 ], and glyphosate [ 4 ], or as adsorbent media to remove phosphorus and heavy metals from stormwater runoff [ 5 , 6 , 7 ]. They have also been used in aquatic systems for metal immobilization [ 8 ] and wastewater for anion (P, Br, F, and Cr) and dye removal [ 9 , 10 ]. Modified WTRs have recently been used to activate peroxymonosulfate and degrade some pesticides and herbicides, such as imidacloprid [ 11 , 12 ] and atrazine [ 13 , 14 ].…”