Fixed-bed adsorption of tannery wastewater pollutants using bottom ash: An optimized process

Mouhri, Ghita El; Merzouki, Mohammed; Kachkoul, Rabie; Belhassan, Hajar; Miyah, Youssef; Amakdouf, Halima; Elmountassir, Rabea; Lahrichi, Anissa

doi:10.1016/j.surfin.2020.100868

Cited by 17 publications

(15 citation statements)

References 48 publications

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“…There are various opportunities for capitalizing on the fly ash by-product, according to its chemical and technological properties [10], including: in ceramics [14], in geopolymers [15,16], in the agricultural sector [17], for adsorption [18,19], in catalysis [2], and as zeolites [20,21]. Fly ash is a pozzolanic mixture resulting from the combustion of coal at temperatures between 650 and 800 °C [15,22,23].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Performance assessment of five adsorbents based on fly ash for removal of cadmium ions

Buema

Lupu

Chiriac

et al. 2021

Journal of Molecular Liquids

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Section: Accepted Manuscriptmentioning

confidence: 99%

Performance assessment of five adsorbents based on fly ash for removal of cadmium ions

Buema

Lupu

Chiriac

et al. 2021

Journal of Molecular Liquids

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“…Recently, various low-cost adsorbents derived from agricultural waste, industrial by-products or natural materials, have been intensively investigated. Some of these materials include bottom ash [9], palm ash [10], zeolite [11], marine sand and saw dust [12,13], limestone and activated carbon [14], Walnut shells [15], and diatomaceous earth materials [16].…”

Section: Introductionmentioning

confidence: 99%

“…Most of these applications were tested on batch experiments and focused on synthetic wastewater; Limited work has been reported for the applicability of eggshell materials for the treatment of real wastewater or more specifically for the treatment of municipal landfill leachate [32]. Furthermore, little attempts were conducted as well in a form of column experiments [9,12]. The motivation of this work is to use calcined eggshell (CES) as a natural adsorbent in a form of continuous flow column experiment to serve as a more cost effective alternative to the current high cost adsorbents used in leachate treatment and thus may open a new vision toward landfill leachate treatment technologies.…”

Section: Introductionmentioning

confidence: 99%

A coagulation-flocculation process combined with continuous adsorption using eggshell waste materials for phenols and PAHs removal from landfill leachate

Jaradat

Shtayat

Odat

2021

Environmental Engineering Research

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A sequential treatment consisting of coagulation/flocculation followed by transport column experiment was adopted and used in this work for the treatment of landfill leachate containing phenols and polycyclic aromatic hydrocarbons (PAHs). Coagulation experiment was performed in a standard jar test apparatus using alum as coagulant material. In column experiments, natural eggshell material was used as filter media after calcinations at 750<sup>o</sup>C either separately or combined with granular activated carbon (GAC). Alum addition at a predetermined optimum dose (3.5 g/L) caused a reduction in total suspended solids (TSS), chemical oxygen demand (COD), total phenols, and total (PAHs) by 82%, 32%, 24%, and 34% respectively. Specific PAHs analysis revealed higher binding affinity of more hydrophobic PAHs toward particles with 50% reduction than those of less hydrophobic PAHs with only 6% reduction. The results obtained from the transport column experiments indicate that calcined eggshell (ESC) particularly when applied as a mixture with GAC can be used as promising adsorbent for both phenols and PAHs. 95% of phenols and PAHs were removed during the first 1,500 pore volumes (PV) of column operation while > 80% were obtained at the end of the experiment (3,500 PV).

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“…Utilisation of such coagulants as alum increases the operational costs of the treatment and limits the practicality of the process. Hence, the interest in using durable agents from renewable sources such as agro-industrial waste, as it is a widely available material at low cost and capable of replacing chemical agents [El Mouhri et al, 2021].…”

Section: Introductionmentioning

confidence: 99%

Contribution to the Treatment of Urban Wastewater in the City of Fez by Coagulation and Flocculation Using a Biodegradable Reagent

Elmansouri¹,

Lahkimi²,

Benaabou³

et al. 2022

J. Ecol. Eng.

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This study includes two parts; the first one, concerns evaluation of the physicochemical and microbiological quality of the urban wastewater of the city of Fez, through a space-time dynamics. In turn, the second part deals with the contribution to the treatment of these effluents, by a new biodegradable reagent in the process of physicochemical treatment (coagulation flocculation). For this purpose, the sampling of urban wastewater was carried out 4 months (September, December, February and June 2019), at a rate of two samplings per period on 4 specific sites along the river Fez, the degree of contamination of which differs from one site to another, according to space and time. The diagnostic of these stations showed a high level of pollution that is difficult to biodegrade. Indeed, this pollution can cause negative effects not only on the environment but also on human's health. In order to take long-term action against the low quality of water and to replace certain inorganic coagulants, alternative processes for water treatment using cactus powder were set up. The characterization of results showed that the urban effluent has a high load in terms of electrical conductivity (EC), dissolved oxygen, chemical oxygen demand (COD), as well as concentrations of faecal coliforms, streptococci and staphylococci. In addition, the purifying power revealed that the removal rate of COD reaches maximum values of 38% and 58% forlimeand the mixture of lime with cactus powder, respectively.

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Fixed-bed adsorption of tannery wastewater pollutants using bottom ash: An optimized process

Cited by 17 publications

References 48 publications

Performance assessment of five adsorbents based on fly ash for removal of cadmium ions

Performance assessment of five adsorbents based on fly ash for removal of cadmium ions

A coagulation-flocculation process combined with continuous adsorption using eggshell waste materials for phenols and PAHs removal from landfill leachate

Contribution to the Treatment of Urban Wastewater in the City of Fez by Coagulation and Flocculation Using a Biodegradable Reagent

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