Optimal Operating Conditions for Adsorption of Heavy Metals from an Aqueous Solution by an Agriculture Waste

Hummadi, Khalid Khazzal

doi:10.31699/ijcpe.2021.2.4

Cited by 14 publications

(14 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum equilibrium adsorption amounts of Cu 2+ , Ni 2+ , and Zn 2+ on a complete monolayer of MDP (q m ) are 82.4, 71.9, and 66.3 mg g − 1 , according to the Langmuir isotherm model (Table S1). These q m values are considerably higher than those reported in literature for the bio-adsorption of heavy metals on the date pits (DP)-based bio-adsorbents (Table 1, [33,70,71]) and also those for the roasted DP (without modi cation of ZnO, Tables 1), likely attributed to the modi ed characteristics of the DP upon loading of ZnO and the followed thermal treatment (vide infra).…”

Section: Adsorption Isotherm Studymentioning

confidence: 57%

“…(showing the adsorption capacities of 0.15 and 0.09 mmol g − 1 DP without any pretreatment for the removal of Cu 2+ and Cd 2+ ) [30] and the recent work by the authors (showing the adsorption capacities of 0.21, 0.15, and 0.13 mmol g − 1 Al-Zahdi Iraqi DP for the removal of Cu 2+ , Zn 2+ , and Ni 2+ ) [33].…”

Section: Introductionmentioning

confidence: 85%

“…S3-b). This could be related to the more amount of accessible adsorption sites on MDP, which were inside the big bio-adsorbent particles but are exposed to the external surface of the bio-adsorbent with a small particle size after crushing and grinding [33]. A further decreased particle size (< 200 µm) was not investigated, considering the signi cant di culty of the separation of the ne bio-adsorbent particles from the solution.…”

Section: Optimization Of Bio-adsorption Parametersmentioning

confidence: 99%

See 2 more Smart Citations

Bio-adsorption of heavy metals from aqueous solution using the ZnO-modified date pits

Hummadi

Zhu

2023

Preprint

Self Cite

View full text Add to dashboard Cite

The bio-adsorption of Cu2+, Ni2+, and Zn2+ in aqueous solution using the ZnO-modified date pits (MDP) as the bio-adsorbent are investigated. The fresh and used bio-adsorbents were characterized by FT-IR, SEM, BET, and XRD. The bio-adsorption parameters (including the pH of solution, the particle size of MDP, the shaking speed, the initial concentration of heavy metals, the dosing of MDP, the adsorption time, and the adsorption temperature) were screened and the data were used to optimize the bio-adsorption process and to study the bio-adsorption isotherms, kinetics, and thermodynamics. Two adsorption models (Langmuir isotherm model and Freundlich isotherm model) and three kinetic models (pseudo-first-order model, pseudo-second-order model, and intra-particle diffusion model) were applied to model the experimental data. Results show that the maximum adsorption amount of Cu2+, Ni2+, and Zn2+ on a complete monolayer of MDP are 82.4, 71.9, and 66.3 mg g-1, which are over 4 times of those of date pits-based bio-adsorbents reported in literature. The bio-adsorption of heavy metals on MDP is spontaneous and exothermic, and is regulated by chemical adsorption on the homogeneous and heterogeneous adsorption sites of MDP surface. This work demonstrates an effective modification protocol for the date pits-based bio-adsorbent for improved bio-adsorption performance.

show abstract

Section: Adsorption Isotherm Studymentioning

confidence: 57%

Section: Introductionmentioning

confidence: 85%

Section: Optimization Of Bio-adsorption Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Bio-adsorption of heavy metals from aqueous solution using the ZnO-modified date pits

Hummadi

Zhu

2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is well-known that the type of adsorbent significantly affects the adsorption process. Numerous studies have recommended a variety of adsorbents, including organic adsorbents, inorganic adsorbents, and agricultural wastes, such as activated carbon (Sulaymon et al, 2010), silica gel (Choudhary et al, 1982), and dates pits (Hummadi, 2021). Bead-shaped adsorbents made of biopolymers are the most effective in removing pollutants from water.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Feasibility of Modified Chitosan Beads for the Adsorption of Nitrate from an Aqueous Solution

Jamka¹,

Mohammed²

2023

J. Ecol. Eng.

View full text Add to dashboard Cite

The objective of the current work was to investigate the effectiveness and mechanism of nitrate removal from an aqueous solution by adsorption using metal (Zr 4+ )loaded chitosan and Bentonite beads (Cs-Bn-Zr). The study was carried out in a batch system, and the effect of the critical factors on the adsorption performance, such as contact time, initial nitrate anion concentration, and adsorbent dosage, were investigated. In addition, the adsorption equilibrium models of the Langmuir, Freundlich, and Temkin isotherms were evaluated. The modified adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and analysis with an energy-dispersive X-ray analyzer (EDX). The results demonstrated that at 0.2 g of CS-Bn-Zr adsorbent with an initial concentration of 50 mg/l and a contact time of 120 minutes, the maximum removal of nitrate ions was found to be 97.28%. The result demonstrated that the maximum adsorption capacity of nitrite ions on the manufactured bead was 110.46 mg/g. The Freundlich model was shown to be the most effective for the adsorbate of nitrate. The pseudo-first-order model fits the adsorption kinetic data well.

show abstract

“…30,31 Adsorption methods provided impressive results because of their inexpensive cost, straightforward design, immunity to toxicants, and efficiency at low adsorbent concentrations. 32,33 Agricultural waste and byproducts have been used as absorbents to treat industrial wastewater in various literary works 27,31,[34][35][36][37][38][39][40][41][42][43][44][45][46] due to the fact that the plant cells contain lignocellulose, cellulose, hemicellulose, lignin, and a slight amount of vitamins, protein, lipids, and ash can be used as biosorbents for pollutants removal. 47 These facts have motivated the present work to prepare low-cost adsorbent from auditable food waste to adsorbed cyanide from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of composite activated carbon from potato peel waste for cyanide removal from aqueous solution

Salman,

Rashid

2023

Env Prog and Sustain Energy

View full text Add to dashboard Cite

This research presents a response surface methodology (RSM) with I‐optimal method of DESIGN EXPERT (version 13 Stat‐Ease) for optimization and analysis of the adsorption process of the cyanide from aqueous solution by activated carbon (AC) and composite activated carbon (CuO/AC) produced by pyro carbonic acid microwave using potato peel waste as raw material. Pyrophosphate 60% (wt) was used for impregnation with an impregnation ratio 3:1, impregnation time of 4 h at 25°C, radiant power of 700 W, and activation time of 20 min. Batch experiments were conducted to determine the removal efficiency of cyanide from aqueous solution to evaluate the influences of various experimental parameters such as contact time, cyanide concentration, initial pH, and dosage of adsorbent on cyanide removal efficiency. The statistical analysis showed that the quadratic model was significant. The model very low probability value (p‐value < 0.0001) for activated carbon and composite activated carbon, and the analysis of variance showed a high coefficient of specification values of adjusted R2 (model accuracy with observation) and predicted R2 (model accuracy without observation). The optimum conditions suggested by the model for the process variable were 160 min, pH = 10, 10 mg/L, 0.1 g/50 mL, for time, pH, concentration, activated carbon, and composite activated carbon dose, respectively. The maximum removal efficiency at these conditions was 98.2% for AC and 99.35% for CuO/AC. The equilibrium adsorption data obtained were analyzed by Langmuir and Freundlich isotherm models and results showed that it was better described by the Freundlich model. Likewise, the data of adsorption kinetic was analyzed using two models: pseudo‐first‐order and pseudo‐second‐order. The results showed that adsorption kinetics was well performed by the pseudo‐second‐order model.

show abstract

Optimal Operating Conditions for Adsorption of Heavy Metals from an Aqueous Solution by an Agriculture Waste

Cited by 14 publications

References 22 publications

Bio-adsorption of heavy metals from aqueous solution using the ZnO-modified date pits

Bio-adsorption of heavy metals from aqueous solution using the ZnO-modified date pits

Assessment of the Feasibility of Modified Chitosan Beads for the Adsorption of Nitrate from an Aqueous Solution

Production and characterization of composite activated carbon from potato peel waste for cyanide removal from aqueous solution

Contact Info

Product

Resources

About