Removal of methylene blue (basic dye) by coagulation-flocculation with biomaterials (bentonite and Opuntia ficus indica)

Journal of Water Process Engineering, Journal Year: 2022, Volume and Issue: 49, P. 102952 - 102952

Published: June 24, 2022

Language: Английский

---

A review on selective dye adsorption by different mechanisms

Journal of environmental chemical engineering, Journal Year: 2022, Volume and Issue: 10(6), P. 108639 - 108639

Published: Sept. 27, 2022

Language: Английский

---

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

Environmental Chemistry Letters, Journal Year: 2023, Volume and Issue: 21(4), P. 2337 - 2398

Published: May 4, 2023

Access to drinkable water is becoming more and challenging due worldwide pollution the cost of treatments. Water wastewater treatment by adsorption on solid materials usually cheap effective in removing contaminants, yet classical adsorbents are not sustainable because they derived from fossil fuels, can induce secondary pollution. Therefore, biological sorbents made modern biomass increasingly studied as promising alternatives. Indeed, such biosorbents utilize waste that would otherwise pollute systems, promote circular economy. Here we review biosorbents, magnetic sorbents, other cost-effective with emphasis preparation methods, types, mechanisms, regeneration spent adsorbents. Biosorbents prepared a wide range materials, including wood, bacteria, algae, herbaceous agricultural waste, animal waste. Commonly removed contaminants comprise dyes, heavy metals, radionuclides, pharmaceuticals, personal care products. Preparation methods include coprecipitation, thermal decomposition, microwave irradiation, chemical reduction, micro-emulsion, arc discharge. Adsorbents be classified into activated carbon, biochar, lignocellulosic clays, zeolites, peat, humic soils. We detail isotherms kinetics. Regeneration supercritical fluid desorption. also discuss exhausted adsorbent management disposal. found agro-waste remove up 68–100% while wooden, herbaceous, bacterial, marine-based 55–99% metals. Animal waste-based 1–99% The average removal efficiency modified around 90–95%, but some treatments, cross-linked beads, may negatively affect their efficiency.

Language: Английский

---

Facile Synthesis and Life Cycle Assessment of Highly Active Magnetic Sorbent Composite Derived from Mixed Plastic and Biomass Waste for Water Remediation

ACS Sustainable Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 10(37), P. 12433 - 12447

Published: Sept. 7, 2022

Plastic and biomass waste pose a serious environmental risk; thus, herein, we mixed with plastic bottle (PET) to produce char composite materials for producing magnetic better separation when used in water treatment applications. This study also calculated the life cycle impacts of preparation adsorbent material 11 different indicator categories. For 1 functional unit (1 kg pomace leaves as feedstock), abiotic depletion fossil fuels global warming potential were quantified 7.17 MJ 0.63 CO2 equiv production materials. The (MPBC) was then remove crystal violet dye from its aqueous solution under various operational parameters. kinetics isotherm statistical theories showed that sorption CV onto MPBC governed by pseudo-second-order, Langmuir models, respectively. quantitative assessment capacity clarifies produced exhibited an admirable ability 256.41 mg g-1. Meanwhile, recyclability 92.4% demonstrated after 5 adsorption/desorption cycles. Findings this will inspire more sustainable cost-effective sorbents, including those derived combined streams.

Language: Английский

---

Papaya peel waste carbon dots/reduced graphene oxide nanocomposite: From photocatalytic decomposition of methylene blue to antimicrobial activity

Journal of Bioresources and Bioproducts, Journal Year: 2023, Volume and Issue: 8(2), P. 162 - 175

Published: Jan. 20, 2023

Carbon dots (CDs) have gained unprecedented attention as a novel luminescent zero-dimensional carbon nanomaterial owing to their diverse industrial applications. Herein, we reported the sustainable synthesis of fluorescent CDs from papaya peel waste, acting natural originator. As-prepared and reduced graphene oxide (RGO) were fabricated in composites through facile one-step hydrothermal method. Synthesized RGO/CDs (RC) nanocomposites characterized using spectroscopic, diffraction, electron-microscopic techniques. Nanocomposites with variable RGO CD mass ratios tested for photodegradation textile dye methylene blue (MB). The highest photocatalytic activity (degradation efficiency 87% 135 min) was obtained nanocomposite containing 2꞉1 ratio (RC2). sheets acted media electron acceptors, promoting fast transfer separation photoinduced electrons during excitation, thus preventing recombination holes. Based on agar well diffusion assay, exhibited excellent antibacterial than other materials against Bacillus subtilis (Gram-positive) Pseudomonas aeruginosa (Gram-negative) bacterium. largest inhibition zone area (22 mm), i.e., antimicrobial activity, Gram-positive strains. Taken together, synergistic effect enhanced performance synthesized material.

Language: Английский

---

Methylene blue removal from aqueous solutions using a biochar/gellan gum hydrogel composite: Effect of agitation mode on sorption kinetics

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 232, P. 123355 - 123355

Published: Jan. 20, 2023

Language: Английский

---

Adsorption of food dyes from aqueous solution on a sweet potato residue-derived carbonaceous adsorbent: Analytical interpretation of adsorption mechanisms via adsorbent characterization and statistical physics modeling

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148982 - 148982

Published: Jan. 24, 2024

Language: Английский

---

Assessing cationic dye adsorption mechanisms on MIL-53 (Al) nanostructured MOF materials using quantum chemical and molecular simulations: Toward environmentally sustainable wastewater treatment

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 55, P. 104081 - 104081

Published: July 29, 2023

Language: Английский

---

Bacterial biofilm attachment to sustainable carriers as a clean-up strategy for wastewater treatment: A review

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 63, P. 105368 - 105368

Published: May 16, 2024

Wastewater treatment using biofilm technology with sustainable carriers contributes towards the circular bioeconomy. The use of renewable biological materials and wastes as novel supports promotes material valorisation reusability, decreasing depletion natural resources generation waste emissions. This manuscript presents a comprehensive review bacterial used in wastewater rehabilitation. They include organic inorganic from sources such clays, volcanic rocks, stones, bamboo luffa fibers waste-based wood husk, coconut corncob, tire rubber, cigarette filter rods, textile wastes, among others. characteristics application performance carrier to remove several toxic pollutants nutrients typically found domestic or industrial effluents, batch experiments reactors were analyzed. Cell attachment formation mechanisms are discussed. Processing approaches surface modifications referred presented. emphasizes economic environmental benefits compared traditional ones. survey is tune need explore that included within principles economy, allowing more environment friendly cost-effective water treatment.

Language: Английский

---

Graphene oxide impregnated activated carbon derived from coconut shell through hydrothermal carbonization for cationic dye removal: Adsorptive performance, kinetics, and chemistry of interaction

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 437, P. 140655 - 140655

Published: Jan. 1, 2024

Language: Английский

---