Influence of H2SO4 and ferric iron on Cd bioleaching from spent Ni–Cd batteries

Velgosová, Oksana; Kaduková, Jana; Marcinčáková, R.; Palfy, Pavol; Trpčevská, Jarmila

doi:10.1016/j.wasman.2012.10.007

Cited by 47 publications

(23 citation statements)

References 15 publications

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“…These results are in accordance with previous reports by Kim et al (2005), Liang et al (2010), Velgosova et al (2013), and Jadhav and Hocheng (2014a). These authors suggested that Fe(III) plays a vital role in solubilization of metals.…”

Section: Resultssupporting

confidence: 93%

“…During Fenton process, Fe(III) ions are also produced along with hydroxyl radicals (Karimi et al 2012;Sekaran et al 2013). In past several researchers showed role of Fe(III) in metal solubilization (Kim et al 2005;Liang et al 2010;Velgosova et al 2013;Jadhav and Hocheng 2014a). Hence Fenton process can be used to treat metal-containing solid waste.…”

Section: Introductionmentioning

confidence: 99%

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Enzymatic bioleaching of metals from printed circuit board

Jadhav

Hocheng

2014

Clean Techn Environ Policy

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Enzymes are powerful tool that help to maintain an unpolluted environment through their use in waste management. Enzymatic bioremediation is potentially a rapid method for removal of pollutants. Therefore, the present study has been carried out to investigate the possibility of bioleaching of metals from printed circuit board (PCB) powder by enzymatic bio-Fenton process. To do this glucose oxidase enzyme was used for in situ production of hydrogen peroxide (H 2 O 2 ). The H 2 O 2 was further used in Fenton's reaction for conversion of Fe(II) into Fe(III). Effects of various parameters such as incubation time, temperature, pH, and shaking speed on conversion of Fe(II) into Fe(III) were assessed. This enzymatic bio-Fenton process was further applied for bioleaching of metals. The results showed that metal recovery increased with an increase in initial Fe(II) concentration. Maximum recovery of metals was achieved at 250 mM initial Fe(II) concentration. The metal recovery decreased with an increase in concentration of PCB powder. The present research put forth a novel method for bioleaching of metals.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Enzymatic bioleaching of metals from printed circuit board

Jadhav

Hocheng

2014

Clean Techn Environ Policy

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“…Velgosova et al [20] and Liang et al [21] also described similar chemical reactions (Reactions 1 and 2) for oxidation of Cd and Ni by Fe 3+ . This mechanism of oxidation of metals by Fe 3+ is supported by results of Kim et al [22] They carried out a chemical leaching experiment with CdS and Fe 3+ .…”

Section: Chemical Leaching Of Ni-cd Metals From Spent Batteriesmentioning

confidence: 77%

Removal of nickel and cadmium from battery waste by a chemical method using ferric sulphate

Jadhav

Hocheng

2013

Environmental Technology

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The removal of nickel (Ni) and cadmium (Cd) from spent batteries was studied by the chemical method. A novel leaching system using ferric sulphate hydrate was introduced to dissolve heavy metals in batteries. Ni-Cd batteries are classified as hazardous waste because Ni and Cd are suspected carcinogens. More efficient technologies are required to recover metals from spent batteries to minimize capital outlay, environmental impact and to respond to increased demand. The results obtained demonstrate that optimal conditions, including pH, concentration of ferric sulphate, shaking speed and temperature for the metal removal, were 2.5, 60 g/L, 150 rpm and 30 degrees C, respectively. More than 88 (+/- 0.9) and 84 (+/- 2.8)% of nickel and cadmium were recovered, respectively. These results suggest that ferric ion oxidized Ni and Cd present in battery waste. This novel process provides a possibility for recycling waste Ni-Cd batteries in a large industrial scale.

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“…Metals in the Ni-Cd batteries occur in metallic forms as well as in the form of hydroxides, oxohydroxides. The percentage of particular forms differs in anode and cathode [20,21]. To elucidate the significance of iron in Ni and Cd bioleaching from Ni-Cd batteries the metal dissolution from cathode in the same leaching systems as used for PCBs bioleaching and abiotic leaching is shown in Fig.…”

Section: Dissolution Of Metals From Ni-cd Batteriesmentioning

confidence: 99%

Closing the Loop: Key Role of Iron in Metal-Bearing Waste Recycling

Sedláková-Kaduková

Marcinčáková

Mražíková

et al. 2017

Archives of Metallurgy and Materials

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The role of iron in metal-bearing waste bioleaching was studied. Four various types of waste (printed circuit boards (PCBs), Ni-Cd batteries, alkaline batteries and Li-ion batteries) were treated by bioleaching using the acidophilic bacteria A. ferrooxidans and A. thiooxidans (separately or in mixture). Role of main leaching agents (Fe 3+ ions or sulphuric acid) was simulated in abiotic experiments. Results showed that oxidation abilities of Fe 3+ ions were crucial for recovery of Cu and Zn from PCBs, with the efficiencies of 88% and 100%, respectively. To recover 68% of Ni from PCBs, and 55% and 100% of Ni and Cd, respectively, from Ni-Cd batteries both oxidation action and hydrolysis of Fe 3+ were required. The importance of Fe 2+ ions as a reducing agent was showed in bioleaching of Co from Li-ion batteries and Mn from alkaline batteries. The efficiency of the processes has increased by 70% and 40% in Co and Mn bioleaching, respectively, in the presence of Fe 2+ ions. Based on the results we suggest the integrated biometallurgical model of metal-bearing waste recycling in the effort to develop zero-waste and less energy-dependent technologies.

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Influence of H2SO4 and ferric iron on Cd bioleaching from spent Ni–Cd batteries

Cited by 47 publications

References 15 publications

Enzymatic bioleaching of metals from printed circuit board

Enzymatic bioleaching of metals from printed circuit board

Removal of nickel and cadmium from battery waste by a chemical method using ferric sulphate

Closing the Loop: Key Role of Iron in Metal-Bearing Waste Recycling

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