Adsorption studies on copper, cadmium, and zinc ion removal from aqueous solution using magnetite/carbon nanocomposites

Andelescu, Adelina A.; Nistor, Maria Andreea; Muntean, Simona Gabriela; Rădulescu-Grad, Maria Elena

doi:10.1080/01496395.2018.1457696

Cited by 41 publications

(29 citation statements)

References 37 publications

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“…Alorro et al [24] showed that gold ions adsorbed on magnetite due to higher standard reduction potential of Au than the open circuit potential (OCP) of magnetite, and also observed that small amount of Cu adsorbed even though the standard reduction potential of Cu is lower than OCP of magnetite. Since the standard reduction potential of gold cyanide complex ions decreased to −0.3 V versus SHE from 1.1 V versus SHE in chloride solution [26][27][28], it was expected that the remaining cyanide ions would prevent Au adsorption on the magnetite, whereas a few amounts of copper ions could be adsorbed due to the pH and difference of solution media [29][30][31][32]. The remaining copper ions can have a detrimental effect on the purity of gold in an electrowinning process of gold [33].…”

Section: Results Presented Inmentioning

confidence: 99%

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Bae

Lee

Kim

et al. 2019

Metals

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The removal of the cyanide and copper (Cu) from the waste printed circuit boards (WPCBs) cyanide leach solution through the alkaline chlorination using electro-generated hypochlorite (NaOCl) followed by magnetite (Fe3O4) adsorption is investigated. The efficiency of the destruction of cyanide and precipitation of Cu was increased with increasing the concentration of free available chlorine in NaOCl. More than 99% of free cyanide and 76% of Cu were removed under the following conditions: concentration of chlorine in electro-generated NaOCl, 5.2 g/L; volume ratio of NaOCl/leach solution, 1; pH, ~9.8; ambient temperature for 12 h. Then, magnetite adsorption for selective removal of remaining Cu (50.5 mg/L) was selected and more than 99% of copper ion was successfully removed with dosage 10g/100mL, shaking speed 150 rpm within 30 min. The results revealed that the alkaline chlorination using electro-generated NaOCl followed by magnetite adsorption could completely remove the cyanide and Cu, remaining Au in the final solution.

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Section: Results Presented Inmentioning

confidence: 99%

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Bae

Lee

Kim

et al. 2019

Metals

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“…Three activated carbon (AC) samples with different characteristics were prepared using chemical activation using the NaOH:carbonized sample ratios of 1:1, (Saini et al, 2017) Lotus seedpod-derived biochar 51.18 (Chen et al, 2018) Magnetite/carbon nanocomposites 76.67 (Andelescu et al, 2018 Figure 7. ln qe vs ln Ce linear plot of Freundlich isotherm of Cd(II) ion adsorption for NaOH:carbonized sample ratios of 3:1 (a), 2:1 (b) and 1:1 (c).…”

Section: Discussionmentioning

confidence: 99%

Powdered activated carbon prepared from Leucaena leucocephala biomass for cadmium removal in water purification process

Ibrahim

Amini

Sulaiman

et al. 2019

Arab Journal of Basic and Applied Sciences

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Activated carbons (ACs) were prepared from Leucaena leucocephala biomass. This is an agricultural solid waste by-product, as well as easily grown species available abundantly in Southeast Asia. In this work, activated carbon derived from Leucaena leucocephala biomass was prepared for sequestration of cadmium from aqueous solutions. The activated carbon was produced by a NaOH chemical activation process using NaOH:char ratios (w/w) of 1:1, 2:1 and 3:1 at 800 C. The activated carbon's BET surface areas were determined as 185, 595, and 776 m 2 g À1 for the NaOH:char ratios of 1:1, 2:1, and 3:1, respectively. At initial concentration of 30 mg/l, maximum cadmium adsorption was achieved within 40 min. The adsorbent also showed good sorption of cadmium at pH 7.0 with solution temperature of 30 C. Isothermic studies showed the adsorption process best fitted to Langmuir isotherm which indicates monolayer adsorption had happened while kinetic studies showed physisorption process was favorable, determined by pseudo-first order kinetic model. Maximum adsorption capacity was found to be 70.423 mg/g for NaOH:char ratios of 3:1.

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“…The combination of five biochar treatments was carried out in 10 replicates. Sample of 3 g was taken from each replicate to make carbofuran concentrations in the range of 2 to 20 mg/L (2,4,6,8,10,12,14,16,18,20 ). All these samples were thoroughly mixed and shaken for 24 hrs in an orbital shaker.…”

Section: Pot Trailsmentioning

confidence: 99%

“…The combination of five biochar treatments with carbofuran pesticide together was carried out in 10 replicates. The carbofuran concentrations were made in the range of 1 to 20 mg/L (2,4,6,8,10,12,14,16,18,20 ).All these samples were thoroughly mixed and shaken for 24 hrs in an orbital shaker till the equilibrium was achieved. An aliquot of 5 g of soil from each treatment was taken to determine the carbofuran concentration using UV/VIS spectrophotometer at 273 nm.…”

Section: Batch Sorption Processmentioning

confidence: 99%

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Irreversible sorption of carbofuran by moderately acidic soil amended with biochar

2020

Biointerface Res Appl Chem

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An ecofriendly technique to on farm burning of biomass by making biochar from agricultural waste was provided. Characteristic studies of biomass and biochar such as SEM, Ultimate and proximate analysis, pH, Cation exchange capacity, Water holding capacity, Electrical conductivity, Soil organic matter and Dry matter production were examined. Adsorption and desorption of carbofuran in soil were studied in batch experiment mode. From the experimental studies, it was observed that pH, Cation exchange capacity, Water holding capacity, Electrical Conductivity, Soil organic content and dry matter production increases with biochar addition. Adsorption Studies show that carbofuran adsorbed with control is 0.45 mg/g whereas with 3%BC it was 6.375 mg/g and desorption studies show that with 3% biochar carbofuran desorption is less. Hence Capsicum Annuam Biochar could be one of the promising option for improving the soil health as well as for adsorbing the pesticides.

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Adsorption studies on copper, cadmium, and zinc ion removal from aqueous solution using magnetite/carbon nanocomposites

Cited by 41 publications

References 37 publications

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Powdered activated carbon prepared from Leucaena leucocephala biomass for cadmium removal in water purification process

Irreversible sorption of carbofuran by moderately acidic soil amended with biochar

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