Removal of contaminants from water using Moringa oleifera Lam. as biosorbent: An overview of the last decade

Gomes, Hiago de O.; Freire, Paulo de Tarso Cavalcante; Nascimento, Ronaldo F.; Teixeira, Raimundo Nonato Pereira

doi:10.1016/j.jwpe.2022.102576

Cited by 19 publications

(8 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of all the kinetic models evaluated show that the pseudo-second order model presented the best R 2 values (between 0.986 and 0.999) for the adsorption of As, Cd, Pb, and Zn; similar values were reported for cassava peel biosorbents [ 57 ], Platanus orientalis Linn leaves [ 68 ], guava leaf [ 69 ], and rose stems [ 54 ]. The data indicate that there is chemical adsorption by the formation of chemical bonds, between the biosorbents and metal cations at the monolayer level [ 70 , 71 , 72 ], since there would be electron exchange between the sorbent and the adsorbate, through covalent and ion exchange bonds, which would allow for the initial formation of a single layer by the action of the active centers of the biosorbent, with the possibility of the subsequent formation of other layers by physisorption [ 57 , 71 ].…”

Section: Resultsmentioning

confidence: 99%

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

et al. 2022

View full text Add to dashboard Cite

The contamination of water resources by effluents from various industries often contains heavy metals, which cause irreversible damage to the environment and health. The objective was to evaluate different biosorbents from the weed Rumex acetosella to remove metal cations in wastewater. Drying, grinding and sieving of the stems was carried out to obtain the biomass, retaining the fractions of 250 to 500 µm and 500 to 750 µm, which served to obtain the biosorbents in natura (unmodified), acidic, alkaline, and mixed. Proximal analysis, PZC, TOC, removal capacity, influence of pH, functional groups, thermal analysis, structural characteristics, adsorption isotherms, and kinetic study were evaluated. The 250 µm mixed treatment was the one that presented the highest removal percentages, mainly due to the OH, NH, -C-H, COOH, and C-O functional groups achieving the removal of up to 96.14% of lead, 36.30% of zinc, 34.10% of cadmium and 32.50% of arsenic. For contact times of 120 min and an optimum pH of 5.0, a loss of cellulose mass of 59% at 328 °C and a change in the surface of the material were also observed, which allowed for obtaining a topography with greater chelating capacity, and the Langmuir and pseudo-second order models were better fitted to the adsorption data. The new biosorbents could be used in wastewater treatment economically and efficiently.

show abstract

Section: Resultsmentioning

confidence: 99%

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In our study, the sorption of MO onto activated biochar may follow three possible mechanisms e.g., (i) electrostatic attraction, (ii) π–π interaction, and (iii) H‐bonding (Eltaweil et al, 2021). The electrostatic interactions of amine groups (–NH 2 ), and P=O groups of activated biochar surface with anionic MO molecules (Singh et al, 2022; Yang et al, 2019a), H‐bonding (Kim et al, 2015), and π–π interaction of phenolic (Gomes et al, 2022), esters, and amine structures of activated biochar surface with MO molecules may result in the advanced sequestration of dye (Shaikh et al, 2022; Tran et al, 2017; Yaashikaa et al, 2020). The previously reported research with biomass‐derived biochar for the adsorption of MO was very efficient.…”

Section: Resultsmentioning

confidence: 99%

“…The electrostatic interactions of amine groups F I G U R E 7 Langmuir (blue) and Freundlich (red) fittings for MO adsorption by activated biochar (a, c, e, g, i) and raw biochars (b, d, f, h, j). MO, methyl orange (-NH 2 ), and P=O groups of activated biochar surface with anionic MO molecules (Singh et al, 2022;Yang et al, 2019a), H-bonding (Kim et al, 2015), and π-π interaction of phenolic (Gomes et al, 2022), esters, and amine structures of activated biochar surface with MO molecules may result in the advanced sequestration of dye (Shaikh et al, 2022;Tran et al, 2017;Yaashikaa et al, 2020). The previously reported research with biomass-derived biochar for the adsorption of MO was very efficient.…”

Section: Equilibrium Adsorption Modelingmentioning

confidence: 99%

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

Islam

Roy

Afrose

2022

Remediation Journal

View full text Add to dashboard Cite

Biochar is a promising engineering material to sequestrate organic pollutants from wastewater. In the current study, several surface-modified Moringa (M.) oleifera leaf biochars were prepared and utilized for the sorption of methyl orange (MO) dye from an aqueous solution. Raw biochar was produced by the carbonization of M. oleifera leaves at 350°C in a muffle furnace for 2 h. The surface-modified M. oleifera biochars were prepared at 400°C, 500°C, and 600°C using phosphoric acid (H 3 PO 4 ) at different combinations to improve the biochar pore structure, surface functional groups, and biochar stability. The highest surface area (267.15 ± 42.40 m 2 /g) of the modified biochar was achieved at 500°C with H 3 PO 4 to raw biochar ratio of 1.5. Surface morphological results revealed the formation of pores, troughs, and channels with the increasing activation temperature. The carbon (C) content (wt%) was maximum (79.61%) for activated biochar at 500°C. The presence of enhanced functional groups, e.g., hydroxyl, aliphatic carbon-hydrogen, carbonyl, ester, and phenol structures in surface-modified biochars was observed from FT-IR results. The Langmuir isotherm model was fitted to better describe the adsorption phenomenon for both surface-modified biochars and raw biochar compared to the Freundlich isotherm model. The highest adsorption capacity was

show abstract

“…The several different functions (food production, industrial, mining and drinking water supply) attributed to the utilization of water resources show the importance of water quality management and the need to implement it. Furthermore, proper water resource treatment favors reducing contaminants in the water supply and the safety of the population (Gomes et al, 2022). Water pollution has long been a global problem that has worsened due to rapid industrialization and population development (Cho et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Role of natural coagulants in the removal of heavy metals from different wastewaters: principal mechanisms, applications, challenges, and prospects

2022

Global NEST: The International Journal

View full text Add to dashboard Cite

<p>Industrial wastewater has become a great concern due to high concentrations of several hazardous contaminants, particularly heavy metals. Heavy metal contamination and its consequences for human health and the environment have gained interest in developing low-cost, long-term cleanup technologies. Biologically based wastewater treatment approaches being more effective than conventional treatment methods are getting more attention recently. Applying natural coagulants in wastewater treatments has progressively improved the coagulation-flocculation process efficiency. The main mechanism for heavy metals removal by coagulation is adsorption; therefore, natural coagulants perform better than chemical coagulants in heavy metals removal as natural coagulants contain biopolymers with active sites for heavy metals adsorption. This systematic review focuses on applying nature coagulants for heavy metals removal from different environmental systems. A systematic and comprehensive search for related articles on Web of Science, PubMed, and Scopus on the use of natural coagulant for heavy metal removal from wastewater was conducted up to May 2022. After examining, extracting and deleting duplicate records, 81 relevant articles containing data on types of natural coagulants, extraction methods of active compounds, mechanisms of metal removal by coagulation process, and the performance of natural coagulants for the removal of heavy metals have been reviewed. Their major findings with technical gaps and possible solutions are summarized. The review is novel as it summarizes the main findings of a series of previously published articles on the role of natural coagulants, particularly the removal of heavy metals. The review also identified gaps and research questions and suggested possible solutions for the successful practical application of natural coagulants in wastewater treatment.</p>

show abstract

Removal of contaminants from water using Moringa oleifera Lam. as biosorbent: An overview of the last decade

Cited by 19 publications

References 65 publications

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

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

Role of natural coagulants in the removal of heavy metals from different wastewaters: principal mechanisms, applications, challenges, and prospects

Contact Info

Product

Resources

About