From disposal problem to valuable product: the route of sewage sludge as an adsorbent for congo red removal

Ali, Youssef Aoulad El Hadj; N’diaye, Abdoulaye Demba; Benahdach, Kaouthar; Ahrouch, Mohammadi; Lahcen, Abdellatif Ait; Silanpää, Mika; Stitou, Mostafa

doi:10.1007/s13399-023-03748-2

Cited by 2 publications

(2 citation statements)

References 50 publications

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“…Chitosan modified with activated carbon 5.99 [58] Sewage sludge 25.1 [59] Triazine based porous organic polymer 71.43 [60] Clay-chitosan composite 80.9 [61] Functionalized two-tier nanocomposite membrane 182.5 [62] Porous sheet from nylon fiber waste 188 [63] RBT…”

Section: Adsorbents Qm(mg/g) Referencesmentioning

confidence: 99%

Statistical Optimization of Operational Parameters on Congo Red Adsorption Using Upscaled Polystyrene

Regi,

Selvam

2024

Preprint

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Plastic pollution, particularly from non-biodegradable materials like polystyrene waste, remains a significant environmental concern. Additionally, water contamination with toxic dyes poses a grave threat to nature. To address these issues, waste polystyrene (thermocol) was chemically modified to create an effective dye adsorbent capable of removing harmful Congo Red (CR) dye from water-based media. Utilizing Box Behnken Design-Response Surface methodology (BBD-RSM), adsorption parameters such as adsorbent dose, pH, and contact duration were optimized. Remarkably high levels of adsorption were achieved under the following conditions: adsorbent dosage (0.02 g), pH (4), and contact duration (120 min), resulting in a removal efficiency of 98.9%. The pseudo-second-order model best described adsorption kinetics, and Langmuir isotherm analysis indicated a maximum adsorption capacity of 189.2 mg/g, with thermodynamic experiments confirming the endothermic nature of adsorption. Possible adsorption mechanisms for CR dye on adsorbent were suggested from the characterization results. To minimize solid waste from the CR-loaded adsorbent, it was processed with commercial Acrylonitrile Butadiene Styrene (ABS) through extrusion, yielding 3D printing filaments. Remarkably, these filaments maintained tensile strength and exhibited no dye leaching in aqueous environments. The synthesized adsorbent is effective in removing toxic dyes from water and offers a potential solution for managing Expanded Polystyrene (EPS) solid waste. This research contributes to sustainable practices by recovering waste materials and presents a promising approach for environmental remediation.

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Section: Adsorbents Qm(mg/g) Referencesmentioning

confidence: 99%

Statistical Optimization of Operational Parameters on Congo Red Adsorption Using Upscaled Polystyrene

Regi,

Selvam

2024

Preprint

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“…A secure landfill may cause land pollution and groundwater pollution [ 3 ]. The incineration of sludge produces a large amount of harmful waste gas that pollutes the atmospheric environment [ 4 ]. Sludge undergoing fermentation releases a large amount of odorous gas, harming the living environment [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Nano-Zero-Valent Zinc-Modified Municipal Sludge Biochar for Phosphorus Removal

Zhang

et al. 2023

Molecules

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Municipal sludge biochar (MSBC) can be used to absorb phosphorus in water for waste treatment. Nano-zero-valent zinc (nZVZ) was uniformly attached to MSBC to obtain a highly efficient phosphorus-absorbing composite material, nZVZ–MSBC. Characterization by FTIR, XPS, XRD, and BET showed that nZVZ was uniformly dispersed on the surface of the MSBC. Zinc loading was able to greatly improve the adsorption performance of MSBC for phosphorus. Adsorption experiments illustrated that the adsorption process conformed to the Langmuir model, and the maximum adsorption amount was 186.5 mg/g, which is much higher than that for other municipal sludge biochars. The adsorption process reached 80% of the maximum adsorption capacity at 90 min, and this gradually stabilized after 240 min; adsorption equilibrium was reached within 24 h. The optimum pH for adsorption was 5. The main adsorption mechanism was chemical adsorption, but physical adsorption, external diffusion, internal diffusion, and surface adsorption also played roles. The potential for application as an efficient adsorbent of phosphorus from water was confirmed. In addition, a novel strategy for municipal sludge disposal and resource utilization is provided.

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From disposal problem to valuable product: the route of sewage sludge as an adsorbent for congo red removal

Cited by 2 publications

References 50 publications

Statistical Optimization of Operational Parameters on Congo Red Adsorption Using Upscaled Polystyrene

Statistical Optimization of Operational Parameters on Congo Red Adsorption Using Upscaled Polystyrene

Nano-Zero-Valent Zinc-Modified Municipal Sludge Biochar for Phosphorus Removal

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