Study of electroflotation method for treatment of wastewater from washing soil contaminated by heavy metals

Mota, Izabel de Oliveira da; Castro, José Adilson de; Casqueira, Rui de Góes; Oliveira, Angelo Gomes de

doi:10.1016/j.jmrt.2014.11.004

Cited by 64 publications

(12 citation statements)

References 24 publications

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“…The application of microbubbles as flotation carriers, in fine mineral beneficiation processes, could be a promising approach for solving challenges of fine particle flotation [17]. The technique of electroflotation largely originated in the ex-USSR [18,19]. This technique is innovative, but the most common is electrocoagulation.…”

Section: Flotation-introductionmentioning

confidence: 99%

From Microbubbles to Nanobubbles: Effect on Flotation

2021

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Attachment of particles and droplets to bubbles—the latter being of various fine sizes and created by different techniques (as described in detail)—forms the basis of flotation, a process which indeed was originated from mineral processing. Nevertheless, chemistry often plays a significant role in this area, in order for separation to be effective, as stressed. This (brief) review particularly discusses wastewater treatment applications and the effect of bubble size (from nano- to micro-) on the flotation process.

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Section: Flotation-introductionmentioning

confidence: 99%

From Microbubbles to Nanobubbles: Effect on Flotation

2021

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“…Different methods have been developed and used for the treatment of wastewater. Some of the adopted techniques include centrifugation (Peeters, 2015), filtration (Cardenas et al., 2016), flotation (de Oliveira da Mota et al., 2015), oxidation and evaporation (Li et al., 2016), distillation (Ji, 2018), ion exchange (Tan et al., 2017), precipitation (Sun et al., 2017), electrolysis (Huang et al., 2016), electrodialysis (Akhter et al., 2018), adsorption (Guillaume et al., 2018), crystallization (Lu et al., 2017), micro and ultra-filtration (Pinto et al., 2017), sedimentation and gravity separation, reverse osmosis (Venzke et al., 2017) and coagulation (Mousa and Hadi, 2016). Adsorption is a process which is widely used to remove pollutants from fluids.…”

Section: Introductionmentioning

confidence: 99%

Potential of using kaolin as a natural adsorbent for the removal of pollutants from tannery wastewater

Mustapha

Ndamitso

Abdulkareem

et al. 2019

Heliyon

127

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In the present work, kaolin sample from Gbako Local Government, Niger State, Nigeria was used as an adsorbent for the removal chloride, COD, BOD, sulphate, chromium, cadmium, zinc and the reduction of total alkalinity in tannery wastewater. The kaolin sample was pretreated to enhance its adsorption capacity and then characterized using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), High Resolution Electron Microscopy (HRSEM), High Resolution Transmission Electron Microscopy (HRTEM), Energy Dispersive Spectroscopy (EDX), Selective Area Electron Diffraction (SAED) and Brunauer Emmett-Teller (BET). The specific surface area, pore volume and pore diameter of the kaolin were 17 m2/g, 0.018 cm3/g and 3.587 nm, respectively. The adsorption methods of the parameters onto the kaolin were investigated as functions of contact time, adsorbent dosage and temperature. Equilibrium isotherms for the adsorption parameters were carried out experimentally and the adsorption data correlated very well with Jovanovic and Redlich-Peterson models. Furthermore, the adsorption kinetics followed the Avrami model. From the results of the study it was established that kaolin from Gbako, Nigeria can serve as an economic, safe and effective natural adsorbent for the pollutants removal from tannery wastewater.

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“…Conventional methods for removing lead include physical and chemical treatments such as coagulation/flocculation (Pang et al, 2011), ion exchange (Abo‐Farha et al, 2009), membrane filtration (Gao et al, 2014), chemical precipitation (Chongad et al, 2016), and electrochemical treatment (de Oliveira da Mota et al, 2015). Physical and chemical methods have the advantages of observable effects and fast speeds for the remediation of areas with severe lead pollution.…”

Section: Introductionmentioning

confidence: 99%

Removal of lead ions in an aqueous solution by living and modified Aspergillus niger

Hao

Yang

et al. 2020

Water Environment Research

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An indigenous lead‐tolerant fungal strain was isolated from lead‐contaminated soil and identified as Aspergillus niger, via 18S rRNA gene sequencing. We determined the adsorption and accumulation of Pb(II) by living A. niger and the adsorption of Pb(II) via modified A. niger. This strain resisted and removed 96.21%–100% Pb(II) ranging from 2 to 8 mmol/L Pb(II). Pb‐containing particles were observed outside of the cell, and lead was detected inside the cell under scanning electron microscopy and transmission electron microscopy. The process of measuring the adsorption ability of modified fungal biomass, freeze‐dried, high‐temperature, and alkali‐treated fungal samples was analyzed; they adsorbed 25.02%, 8.76%, and 15.05% Pb(II) under 8 mmol/L Pb(II) in 43, 10, and 10 hr, respectively. These three types of modified A. niger fit the pseudo‐second‐order model equation well. Practitioner points Isolation and identification of effective Pb(II) removal strain from the soil around Dexing lead‐zinc mine. The ability of living and modified Aspergillus niger to remove Pb(II) in an aqueous environment was evaluated. Lead distributions inside and outside the cell were analyzed by SEM and TEM. Kinetic models for modified biomass adsorbing Pb(II) were made for describing adsorption process.

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Study of electroflotation method for treatment of wastewater from washing soil contaminated by heavy metals

Abstract: Please cite this article in press as: de Oliveira da Mota I, et al. Study of electroflotation method for treatment of wastewater from washing soil contaminated by heavy metals. J Mater Res Technol. 2014. http://dx.

Cited by 64 publications

References 24 publications

From Microbubbles to Nanobubbles: Effect on Flotation

From Microbubbles to Nanobubbles: Effect on Flotation

Potential of using kaolin as a natural adsorbent for the removal of pollutants from tannery wastewater

Removal of lead ions in an aqueous solution by living and modified Aspergillus niger

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