Effect of nettle plant extract on the cementation of copper onto zinc in acidic sulfate solutions

Zaabar, Aida; Aitout, R.; Makhloufi, L.; Alilat, K.; Maziz, Salah; Saïdani, B.

doi:10.1016/j.hydromet.2013.03.004

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…The effects of different variables such as extraction temperature, solid/solvent ratio, water/ethanol ratio and extraction time, on the antioxidant activity, were studied using FFD. The conditions used in each experiment were settled according to the 2 4 FFD, as presented in Table I.…”

Section: Plant Materials Extractionmentioning

confidence: 99%

“…In this study, FFD methodology has been carried out to optimize the antioxidant activity of the samples. Two levels and four variables were used in this investigation, requiring 16 (2 4 ) experiments plus four experiments performed at the center point to evaluate the experimental error variance. The four selected factors were studied between a lower level coded (−1), a higher level coded (+1) and the center point coded (0).…”

Section: Experimental Designmentioning

confidence: 99%

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Anticorrosion action of the olive leaf compounds extracted under optimal parameters as determined with experimental design

Touazi

Bučko

Maizia

et al. 2023

JSCS

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In this study, an agricultural waste product was used to prepare a green corrosion inhibitor based on olive leaves (Olea Europaea Syslvestris). Firstly, an optimization study of antioxidant activity of Olea Europaea Syslvestris leaves monitored by the DPPH free radical trapping method, was carried out using full factorial design. In the second step, the extract obtained under optimal conditions was tested as a green corrosion inhibitor for steel in 0.5 mol dm?3 HCl, using gravimetric and electrochemical methods. The results obtained by various tech-niques showed that the extract acted as a mixed-type inhibitor. The adsorption of the inhibitor was spontaneous (?Gads = ?12.443kJ mol?1), through the mechanism of physical adsorption, and it obeyed the Langmuir adsorption isotherm. The highest corrosion inhibition efficiency of 92 % was obtained for 2.8 10?3 g cm?3of inhibitor, as measured by gravimetric method.

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Section: Plant Materials Extractionmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Anticorrosion action of the olive leaf compounds extracted under optimal parameters as determined with experimental design

Touazi

Bučko

Maizia

et al. 2023

JSCS

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“…Исследования показывают, что процесс цементации очень чувствителен к присутствию поверхностно-активных веществ и органических примесей [11][12][13][14]: снижается извлечение металлов из растворов, уменьшается крупность частиц цементата [15][16][17], что связывают с повышенным выделением водорода и пассивацией поверхности цементатора. Однако отдельные работы свидетельствуют о положительном влиянии некоторых органических соединений (экстракт крапивы, диэтилдитиокарбамат натрия) на скорость цементации меди цинком и снижение расхода цинка, в том числе на выделение водорода [18][19][20]. Поэтому большую роль для прогнозирования целесообразности применения реагентов играет предварительная оценка влияния используемых при выщелачивании органических реагентов на последующие стадии процесса.…”

Section: Introductionunclassified

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Kolmachikhina

Sviridov

Naumov

2020

Izv.VUZ. Tsvet. Met.

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The article focuses on the effect of sodium lignosulfonate (LS), anionic surfactants (sodium dodecylsulfate (SDS), sodium dodecylbenzene sulfonate (SDBS)), and their mixtures on the rate of copper cementation by zinc. The results obtained demonstrate a decrease in copper cementation rate with the increasing LS and SDBS concentrations. There was also excessive zinc consumption for copper ion cementation noted due to LS and SDBS anion adsorption on positively charged zinc cathodic areas of the cementing agent and the precipitate. This led to a decrease in the rate of copper particle nucleation, energy consumption for forming new copper nucleation centers, and conditions for hydrogen overpotential reduction. In addition, rising temperature led to a decrease in zinc consumption in the presence of LS. Surfactants under investigation may be ranked by the negative impact on copper ion cementation in an ascending order as follows: SDS < SDBS < LS. LS + SDS mixture testing showed its irregular effect on copper cementation rate at test temperatures. Experiments with LS and SDBS mixtures demonstrated a linear decrease in copper ion cementation rate with increasing SDBS concentration and simultaneously rising zinc consumption. Due to the negative impact of investigated reagents discovered, we proposed a method for removing organic impurities from solutions using multilayered aluminosilicates modified by cationic surfactants. The results obtained indicate the high effectiveness of organic impurity removal from solutions providing for a 50 % increase in cementation rate in the presence of LS + SDBS mixture together with a decrease in zinc consumption.

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“…The general reaction for a cementation process is given by [12] mNn ++ nM→nMm ++ mN (1) where N represents the noble metal and M the reductant metal. This process has been applied in metallurgy, to recover metals from dilute leach liquors [13][14][15][16][17][18]. It is also exploited in metal finishing industry to recover noble metals such as copper from some waste solutions, etc.…”

Section: Introductionmentioning

confidence: 99%

Removal of Copper From Wastewater By Cementation From Simulated Leach Liquors

Nassef¹,

El-Taweel²

2015

J Chem Eng Process Technol

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Every year, tons of precious and/or toxic metals are thrown away in industrial liquid effluents and most frequently directly in natural environment. The recovery of those metals in dilute solutions is an everyday problem associating both ecology and economy. Copper is among the most prevalent and valuable metal used by industry. Cementation is one of the most effective and economic techniques for recovering toxic and or valuable metals from industrial waste solution and from leach liquors obtained by leaching low grade copper ore. The present study was carried out to investigate the removal of copper metal ions from synthetic waste water by cementation using a rotating iron cylinder. The study covered the effect of different parameters in batch mode which are: Initial copper concentrations, pH values, rotational speed, and reaction temperature on the rate of cementation. The rate of cementation was found to increase with increasing rotational speed, temperature, and pH till a value of 2.1 and then starts to decrease .On the other hand as the initial copper ions concentration increases from 0.2 to 0.4 M the rate of copper ions removal increase. The rate of copper recovery ranged from 10% to 90% per hour depending on the operating conditions Rates of cementation which can be expressed in terms of the rate of mass transfer were correlated to the controlling parameters by dimensionless equation: Sh=0.18 SC0.33 Re0.961. This equation can be used in the design and operation of high-productivity cementation reactor.

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Effect of nettle plant extract on the cementation of copper onto zinc in acidic sulfate solutions

Cited by 7 publications

References 30 publications

Anticorrosion action of the olive leaf compounds extracted under optimal parameters as determined with experimental design

Anticorrosion action of the olive leaf compounds extracted under optimal parameters as determined with experimental design

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Removal of Copper From Wastewater By Cementation From Simulated Leach Liquors

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