Removal Of Nickel Research Articles

Agricultural waste material Cotton Stack Activated Carbon as a suitable adsorbent for removing nickel (Ni++) ions, a heavy metal, from aqueous solutions: Synthesis, Characterization, and Isotherm Study.

Activated carbon (AC) produced from the cotton stack with activating zinc chloride (CSZn) in muffle fernane under nitrogen atmosphere in 600°C. The chemical activation has increased its surface area. It shows a strong capacity of adsorption for the removal of nickel from an aqueous solution due to its enhanced porous structure and higher pHpzc value. The ability was studied using a variety of variables, such as varying the pH, concentration, temp, time of contact, and dose of adsorbent, and optimal conditions were found at pH 8, 10 mgL-1,90 min, 40°C and 200mg respectively. The removal of 75% of the Ni++ ion at a starting concentration of adsorbent at 100 mg was observed. The experimental adsorption results suit the Langmuir isotherm in the isotherm investigations fairly well. The efficient and affordable generation of activated carbon utilizing cotton stack agro-waste may be the solution for the issue of disposing of agricultural trash.

Adsorption of toxic metals from landfill leachate onto guinea fowl eggshells in the era of green chemistry

One of the best and most affordable ways to remove harmful metals from water is by adsorption. This study investigated the efficiency of guinea fowl (Numida meleagris) eggshells as a low-cost adsorbent for cadmium (Cd) and nickel (Ni) removal from landfill leachate. In replicas, 100 mL wastewater was added to each of the weighed adsorbent dosages (1 g, 1.5 g, 2 g, 2.5 g, 3.0 g, and 3.5 g) in a flat-bottom flask and agitated for 60 minutes at pH of 7.82 and temperature 24 °C. The adsorption efficacy of cadmium and nickel by guinea fowl eggshells were 90.5% to 96.5% and 96.1% to 99.3%, respectively. The maximum adsorption capacity of cadmium was 4.89 × 10-2 mg/g and an adsorption equilibrium (KL) 22.74 mg/L. The Langmuir isotherm model was better fitted to the results of the experiment than the Freundlich isotherm model.

Bio-sorbent from castor oil polyurethane foam containing cellulose-halloysite nanocomposite for removal of manganese, nickel and cobalt ions from water

In order to mitigate the contamination of water with heavy metals, caused by mining dam failures in Brumadinho and Mariana in Brazil, eco-friendly bio-based castor oil polyurethane foams, containing a cellulose-halloysite green nanocomposite were prepared. Polyurethane foams containing none (PUF-0), 5%wt (PUF-5), and 10%wt (PUF-10) of the nanocomposite were obtained. The application of the material in aqueous media was verified through an investigation of the efficiency of adsorption, the adsorption capacity, and the adsorption kinetics in pH= 2 and pH= 6.5 for manganese, nickel, and cobalt ions. An increase of 5.47 times in manganese adsorption capacity was found after only 30 min in contact with a solution having this ion at pH= 6.5 for PUF-5 and 11.38 times for PUF-10 when both were compared with PUF-0. Adsorption efficiency was respectively 68.17% at pH= 2 for PUF-5% and 100% for PUF-10 after 120 h, while for the control foam, PUF-0, the adsorption efficiency was only 6.90%.

Synthesis and adsorption capacity of biochar derived from Tamarindus indica shell for the removal of heavy metal

<p>Tamarindus indica shell biochar is employed as an alternate adsorbent precursor for the removal of heavy metal ions from aqueous solutions. It investigated the Tamarindus indica shell biochar's capacity to absorb chromium (Cr), copper (Cu), and Lead (Pb). This study showed the extensive explored how biosorption experimental limitations counting primary metal attentiveness, adsorbent dosage, temperature, and contact time affect the process. The complete analysis of the Tamarindus indica shell's adsorption capability with respect to chromium, copper, and nickel removal was conducted using a batch adsorption procedure. Determining the amount of heavy metal removal in the aqueous solution proceeded by Gas Chromatography (GC). The experimental data analyzed using the Yoon Nelson and Thomson models to regulate the equilibrium isotherms. The optimal parameters for the overall adsorption model were determined by using ANOVA. Investigate the adsorbent's surface area to determine the presence of heavy metal presents using SEM, XRD, and FTIR techniques. Each researched heavy metal's adsorption capability is listed below: Cr = 6.07 mg/L, Cu = 5.53 mg/L and Pb = 5.497mg/L with a removal percentage of 64%, 92% and 78%, respectively. The results showed that biochar generated from Tamarindus indica shells is an effective adsorbent for removing copper from aqueous solutions but not a viable biosorbent for removing chromium. Also, the regenerated column's adsorption capability was examined. The outcomes of the research demonstrated that bio-char, which produced from Tamarindus indica shell can be employed as an efficient and reasonably priced adsorbent to remove heavy metal ions from aqueous solutions.</p>

Efficient adsorption of nickel and chromium(VI) from aqueous solutions using lignocellulose nanofibers: Kinetics, isotherms, and thermodynamic studies

Abstract The entry of heavy metals due to industrial activities into the environment is one of the major problems in this century. Nickel and chromium(VI) are the toxin elements that are used in various industries. In this study, lignocellulose nanofiber was purchased from the Nano-Novin Polymer Company (Gorgan, Iran) and used as an adsorbent for the removal of nickel and chromium(VI) ions from aqueous solutions in a batch system. The effects of pH, initial concentration, adsorbent dose, contact time, and temperature were investigated. The adsorption mechanism was determined by Langmuir, Freundlich, kinetic, and thermodynamic models. Investigation of equilibrium isotherms nickel and chromium(VI) showed that the isotherm fitted well with the Freundlich model. The pseudo-second-order model with the larger correlation coefficient had a greater fitness against experimental data in the kinetic studies. Thermodynamic parameters of both nickel and chromium such as Gibbs free energy, enthalpy, and entropy were calculated which indicated spontaneous, endothermic, and random processes, respectively. Lignocellulose nanofiber can be suggested as a good adsorbent that is highly capable of adsorbing nickel and chromium(VI) from aqueous solutions.

Molecular dynamics simulations of the nickel removal from crude oil by neutral and charged spherical polymer brushes

Nickel in crude oil adversely affects the refining process for rapidly deactivating the hydrogenation and cracking catalysts. Polymer brushes bearing high-density ligands have shown promising nickel removal ability. In this work, submicron polybutadiene (PB) grafted by polyacrylamide (PAM@PB) was prepared and characterized by the transmission electron microscope, dynamic light scattering, and elemental analysis, which was also compared with the PB latex grafted by polyacrylic acid (PAA@PB) synthesized in our previous work. The nickel removal rates by both brushes were evaluated through the electric desalination process. Theresults show that the nickel removal capacity of PAA@PB is higher than that of PAM@PB. By the molecular dynamics simulations, the stretching and competitive chelation of polymer brush models PAA@PB-M and PAM@PB-M were investigated. Charged polyacrylic acid brushes usually have a higher thickness layer and a lower ligand density under the electrostatic repulsion and hydrogen bonding. The electrostatic interaction plays a more important role than the van der Waals interactions on nickel removal. PAA@PB-M is more attractive against Ni2+ ions than PAM@PB-M. The inevitable formation of stable sandwiched π-π stacking structures between Ni2+ ions and multiple porphyrin rings causes great difficulty in nickel removal during the electric desalination process. Adding protons to the oil phase can reduce the formation of the sandwiched structures and further improve nickel removal rates. In this paper, molecular dynamics simulation is innovatively applied to the mechanism of demetallization of polymer brushes, revealing the differences in structure and demetallization between charged and neutral polymer brushes, which provides guidance for the design of core–shell polymer brushes with high demetallization efficiency.

Yeast-As Bioremediator of Silver-Containing Synthetic Effluents.

Yeast Saccharomyces cerevisiae may be regarded as a cost-effective and environmentally friendly biosorbent for complex effluent treatment. The effect of pH, contact time, temperature, and silver concentration on metal removal from silver-containing synthetic effluents using Saccharomyces cerevisiae was examined. The biosorbent before and after biosorption process was analysed using Fourier-transform infrared spectroscopy, scanning electron microscopy, and neutron activation analysis. Maximum removal of silver ions, which constituted 94-99%, was attained at the pH 3.0, contact time 60 min, and temperature 20 °C. High removal of copper, zinc, and nickel ions (63-100%) was obtained at pH 3.0-6.0. The equilibrium results were described using Langmuir and Freundlich isotherm, while pseudo-first-order and pseudo-second-order models were applied to explain the kinetics of the biosorption. The Langmuir isotherm model and the pseudo-second-order model fitted better experimental data with maximum adsorption capacity in the range of 43.6-108 mg/g. The negative Gibbs energy values pointed at the feasibility and spontaneous character of the biosorption process. The possible mechanisms of metal ions removal were discussed. Saccharomyces cerevisiae have all necessary characteristics to be applied to the development of the technology of silver-containing effluents treatment.

Removal of nickel ions from aqueous solution using treated rice husk: an adsorption study

This article deals with the biosorption of nickel metal on the surface of rice husk and its acid treated form under batch experimentations. Various parameters were studied such as time, concentration of synthetic solution, pH and bio sorbent dose to determine the effect of adsorption of nickel metal on the surface of rice husk. Equilibrium time was found to be 92 min. The amount of nickel adsorbed increased with increase in their contact time. It was found that acid treated rice husk has good ability to remove highest amount of nickel in comparison with raw form of rice husk. The percentages for the removal of nickel was achieved as 86% and 66% for treated and raw form of rice husk respectively. It could be concluded that the removal efficiency was enhanced by increasing wastewater initial concentration in the first percentage of adsorption and then decreased due to saturation of rice husk particles.

Characteristics of activated carbon derived from Camellia oleifera cake for nickel ions adsorption

This study used Camellia oleifera cake to prepare activated carbon (AC) for nickel removal from aqueous solutions. After carbonization at 700 °C for 2h, activation was subsequently carried out with four different activators (Na2CO3, KOH, NaOH, H3PO4). The results showed that the four ACs had well-developed microporous structures. The AC with NaOH activation had the highest specific surface area of 512.18 m2 g−1, and the largest pore volume of 0.356 cm3 g−1. The adsorption of Ni(II) on the ACs showed that the removal ratio of Ni2+ reached 95.7% at 25 °C on AC with Na2CO3 activation when the input amount was 5 g L−1, while AC with NaOH as activator had the highest Ni2+ removal ratio of 86.75% when the input amount was 1g L−1 at 25 °C. In addition, the adsorption capacity of AC was increased when the temperature rose between 25 and 60 °C. Compared to pseudo-first-order (PFO) model, the adsorption of Ni2+ on ACs is better suited by pseudo-second-order (PSO) model, and the ion precipitation in chemical adsorption is proved as adsorption mechanism.

Prospects of a hot spring-originated novel cyanobacterium, Scytonema ambikapurensis, for wastewater treatment and exopolysaccharide-enriched biomass production.

The present work performs the polyphasic characterization of a novel cyanobacterial species Scytonema ambikapurensis isolated from an Indian hot spring and evaluates its wastewater bioremediation potential. While the physicochemical analyses of the wastewater indicated high load of nutrients and metals, the wastewater bioremediation experiment performed using the test cyanobacterium denoted the removal of 70 and 86% phosphate, 49 and 66% sulfate, 96 and 98% nitrate, 91 and 92% nitrite, 95 and 96% ammonia, 66 and 72% chloride, 79 and 81% zinc, 68 and 80% nickel, 81 and 90% calcium, and 80 and 90% potassium from the autoclaved and un-autoclaved wastewater, respectively, after 20days of culturing. The kinetics study of zinc and nickel removal from wastewater revealed that the cyanobacterium employed sequential biosorption (by following pseudo-second-order kinetics model) and bioaccumulation methods to remove these two metals. The quality of the autoclaved and un-autoclaved wastewater was further improved by the cyanobacterium through reduction of hardness by 74 and 81%, respectively. In wastewater, the cyanobacterium not only enhanced its biomass, chlorophyll and carbohydrate contents, but also produced small amount of released and high capsular exopolysaccharide (EPS). The FTIR and TGA analyses of capsular EPS unraveled that it was a negatively charged sulfated biomolecule having thermostability up to 240°C, which suggested its possible use as excellent emulsifying, viscosifying, and biosorption agent. The credibility of this EPS as biosorption agent was ascertained by evaluating its metal chelating ability. Finally, the experimental data denoting the ability of S. ambikapurensis to bioremediate wastewater and simultaneously produce EPS was statistically validated by PCA1-pollutant removal model and the PCA2-cellular constituent model, respectively. Briefly, the study discloses that the cyanobacterium has huge biotechnological and industrial importance as it bioremediates wastewater and simultaneously produces thermostable exopolysaccharide.

Corrigendum to “In-situ synthesis of 3D multifunctional graphene-based layered double oxide composite for the removal of nickel and acid orange” [Colloids Surf. A: Physicochem. Eng. Asp. 657 (2023) 130533

Corrigendum to “In-situ synthesis of 3D multifunctional graphene-based layered double oxide composite for the removal of nickel and acid orange” [Colloids Surf. A: Physicochem. Eng. Asp. 657 (2023) 130533

Nickel removal from an industrial effluent by electrocoagulation in semi-continuous operation: Hydrodynamic, kinetic and cost analysis

In the nickel and cobalt production plant located in Punta-Gorda Cuba, an effluent liquor is obtained with several pollutants species of Ni(II)–NH3–CO2–SO2–H2O system. In previous studies the performance of electrocoagulation (EC) for the nickel removal from this effluent was demonstrated on a lab-scale and bench-scale. In this research, geometric, electrical and equilibrium parameters used as criteria for scaling-up the EC process were evaluated through hydrodynamic, kinetic and operating cost analysis. For this purpose, four semi-continuous stirred-tank electrochemical reactors of equal sized with 200 L useful volume were design. Based on the residence time distribution (RTD) curve, the hydrodynamic behavior of EC systems followed multi-branch tanks-in-series model. Experimental mean residence time was of 92 min and hydraulic efficiency 92% for a liquor flow rate 2 L∙min−1, due to the presence of short-circuit, internal recirculation and 3% dead zone. Then, at the operating parameters: nickel concentration 277 ± 52 mg L−1, current density 6.26 mA cm−2, pH 8.40 ± 0.28 and temperature 50 ± 2 °C, the maximum nickel removal was 97.8% with an operating cost $1.008 kg−1 Ni. Combination of RTD model and the conversion time kinetic model (CTV) was presented to predict the removal efficiency with successful outcomes, and the time for complete conversion was 23.3 min under control of chemical reaction. The precipitate presented a nickel concentration of 35.71 ± 2.13%, aluminum 6.05 ± 0.83%, true density 2836 ± 449 kg m−3 and typical layered structure. These results suggest the opportunity for the projection of an industrial production unit of double lamellar hydroxide and reduce the adverse environmental impact.

Follow-Up Application of <i>Spondias Mombin</i> Modified Nano-Sorbent for Trace Metals Remediation

Environmental pollution, specifically soil contamination by trace metals, is a significant problem that has caused widespread concern around the globe due to its grave negative effects on the fragile ecosystem. Zero-valent iron nano-compound modified with <i>Spondias mombin</i> leaves extract was employed in the removal of Zinc (Zn), Chromium (Cr), Lead (Pb), and Nickel (Ni) from contaminated soil. The metal compositions in both plant and soil were evaluated using Atomic Absorption Spectrophotometer (AAS). The result showed that the pH conditions for optimum removal efficiency (%) of Zn (70.53%), Pb (98.89%), and Ni (99.99%) were in the range of 7 < pH ≤ 12 while Cr (98.67%) was in the range of 3 < pH ≤ 7. The result revealed that the adsorbent dosage for optimum removal efficiency (%) was 0.2 g for Cr (99.99%) and Pb (98.89%) while 0.8 g for Zn (57.51%), and Ni (99.99%). The optimum contact time was 15 min for Cr (99.99%) and Pb (86.38%) while 120 min for Zn (52.43%) and Ni (99.99%). The modified nano-compound showed higher removal efficiency (%) for Ni (99.99%) under the same condition. This study has revealed that the modified adsorbent can serve as an effective and efficient eco-benign matrix for soil remediation.

Nickel ion removal system using activated carbon: A theoretical investigation

We investigate the electronic and structural properties of two activated carbon models interacting with a Ni2+ ion via theoretical calculations. Interaction distances, charge transfer, adsorption energy, electrostatic potential maps, and density of states are applied in this work to support which activated carbon model is more favorable for nickel removal from the environment. We show that the existence of a defect in the activated carbon molecular structure causes a considerable change in the properties of the system, including its nickel ion removal feature via the adsorption process.

MOF based coated adsorption system for water desalination and cooling integrated with Pre-treatment unit

Recently, the adsorption technologies received significant interest for water purification and desalination application as well as for clean cooling production, since they offer an environmentally friendly solution using low-grade energy compared to the conventional systems. In this work, a hybrid adsorption system based on combining a pre-treatment unit for heavy metal removal with a desalination and cooling unit is experimentally investigated. Activated carbon and zeolite in powder and beads forms have been used in pre-treatment unit as adsorbent materials for the removal of iron, lead, manganese and nickel from ground water, while a coating form of aluminium fumarate MOF adsorbent material is used in heat powered adsorption heat pump for desalination and cooling unit. For the formation of activated carbon/zeolite beads, 45 % polymer loading showed the highest efficiency for the removal of the heavy metals which reached 87 % of iron. After taking the purified water from the pretreatment unit, the desalination and cooling unit produced higher than 260L/day of distilled water and 6.9 kW of cooling power with a coefficient of performance of 0.26 using a coating thickness of 0.75 mm on the wire finned tube heat exchanger adsorber beds. With the hybrid system, a practical mitigation of the accumulation of some chemical compounds on the evaporator surface with continuous operation was achieved. The effect of evaporator and condenser chamber volumes are investigated to minimize the compactness of the MOF adsorption heat pump. This hybrid adsorption system demonstrates a promising solution for pure water and cooling production over the conventional available ones.

Highly effective removal of nickel ions from wastewater by calcium-iron layered double hydroxide.

Water pollution due to heavy metals has become a universal environmental problem. Ni(II) is a common heavy metal ion in polluted wastewater, which has high toxicity and carcinogenicity. In this study, the structure of a calcium-iron layered double hydroxide (Ca-Fe-LDHs) was synthesized and characterized by FTIR, XRD, SEM and XPS. Then, Ni(II) ion was effectively removed by Ca-Fe-LDHs and its mechanism for this materials was described. The maximum adsorption capacity of Ni(II) for Ca-Fe-LDHs was 418.9mg‧g-1 when the initial concentration of Ni(II) was 1g/L. The adsorption and removal of Ni(II) by Ca-Fe-LDHs was attributed to the action of hydroxyl groups on the hydrotalcite, generating surface capture. Ni(OH)2)0.75(H2O)0.16(NiCO3)0.09, Ni(OH)2, NiO, NiSO4 and other precipitates were generated on its surface. And a small amount of Ni-Fe-LDHs was generated through isomorphic transition before hydrolysis. Therefore, surface capture and isomorphic transition enhanced the removal efficiency of Ni(II) with Ca-Fe-LDHs, making Ca-Fe-LDHs as a potential material for effective removal of Ni(II).

Determination of optimal operating conditions for AC-powered electrocoagulation process coupling green additive Tartaric Acid to remove Ni2+: Pyomo and RSM approach

A novel Python-based open-source optimization framework, namely Pyomo (Python optimization modeling objects), alongside a conventional optimization method, RSM (response surface methodology), was utilized to determine the optimal operating conditions of an alternating current-powered electrocoagulation (ACPE) process for nickel removal. In this regard, four mutable operating factors, current density (5–9 mA/cm2), initial nickel concentration (200–400 mg/L), initial pH of the solution (5–9), and electrolysis time (30–60 min), along with a fixed amount of an additional eco-friendly substance, Tartaric Acid (155 mg/L) were considered. Metal removal efficiency (OF1) and operating costs (OF2) were monitored and evaluated as objective functions with the aim of maximization and minimization, respectively. Experiments were conducted according to the central composite design (CCD), and validation outcomes established a reasonable agreement between the predicted models and the experimental data. The multi-objective optimization process yielded two sets of 30-optimal-solution obtained through Pyomo and RSM. Accordingly, the proposed solutions by the Pyomo were found to be more flexible and eclectic, supplying the local decision maker(s) with a diverse spectrum of optimal operating conditions. Adding TA was also effective in reducing electrical energy consumption by up to 46%.

Controlling metal ion migration in contaminated groundwater with Iraqi clay barriers for water resource protection.

This study investigates the effectiveness of using Iraqi clay as a low-permeability layer to prevent the migration of lead and nickel ions in groundwater-aquifers. Tests of batch operation have been conducted to determine the optimal conditions for removing Pb2+ ions, which were found to be 120 minutes of contact time, a pH of 5, 0.12 g of clay per 100 mL of solution, and an agitation of 250 rpm. These conditions resulted in a 90% removal efficiency for a 50 mg L-1 initial concentration of lead ions. To remove nickel ions with an efficiency of 80%, the optimal conditions were 60 minutes of contact time, a pH of 6, 12 g of clay per 100 mL of solution, and an agitation of 250 rpm. Several sorption models were evaluated, and the Langmuir formula was found to be the most effective. The highest sorption capacities were 1.75 and 137 mg g-1 for nickel and lead ions, respectively. The spread of metal ions was simulated using finite element analysis in the COMSOL multiphysics simulation software, taking into account the presence of a clay barrier. The results showed that the barrier creates low-discharge zones along the down-gradient of the barrier, reducing the rate of pollutant migration to protect the water sources.

Synthesized activated carbon derived from discarded styrofoam and effectively removal of nickel (II) from aqueous solutions

Synthesized activated carbon derived from discarded styrofoam and effectively removal of nickel (II) from aqueous solutions

Biosorption for Nickel Removal with Microbial and Plant-Derived Biomasses: A Review Study

Biosorption for Nickel Removal with Microbial and Plant-Derived Biomasses: A Review Study