Removal of chromium (III) from wastewater by electrocoagulation method

Shahriari, Toktam; Bidhendi, Gholamreza Nabi; Mehrdadi, Naser; Torabian, Ali

doi:10.1007/s12205-014-0642-8

Cited by 14 publications

(4 citation statements)

References 34 publications

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“…4 b y 4c, shows that the best efficiencies were obtained at

, where a maximum chromium removal value of

was achieved with a current intensity of

amperes and a time of

minutes. This result is consistent with the values reported by Shahriari, who obtained the highest chromium removal efficiency at an optimum

, who reported that the hydroxide produced formed a gelatinous sediment of iron hydroxide and then a cosediment of iron and chromium was formed [ 30 ]. Chromium

at acidic pH, lower than

, remains in its ionic form, as OH- radicals increase, they form complexes with chromium, reaching higher pH, this causes the precipitation of chromium hydroxide (Covarrubias, C. et al ,2005; Basaldella, E, 2007).…”

Section: Resultssupporting

confidence: 92%

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Aguilar-Ascón,

Marrufo-Saldaña,

Neyra-Ascón

2024

Heliyon

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“…4 b y 4c, shows that the best efficiencies were obtained at

, where a maximum chromium removal value of

was achieved with a current intensity of

amperes and a time of

minutes. This result is consistent with the values reported by Shahriari, who obtained the highest chromium removal efficiency at an optimum

, who reported that the hydroxide produced formed a gelatinous sediment of iron hydroxide and then a cosediment of iron and chromium was formed [ 30 ]. Chromium

at acidic pH, lower than

Section: Resultssupporting

confidence: 92%

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Aguilar-Ascón,

Marrufo-Saldaña,

Neyra-Ascón

2024

Heliyon

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“…The maximum permissible limits for Ni(II), Cu(II), and COD in water are 0.2 mg/L, 2 mg/L, and 200 mg/L, respectively (Sponza & Karaoǧlu, 2002). Several methods including coagulation (Shahriari, Bidhendi, Mehrdadi, & Torabian, 2014), advance oxidation processes (Marinho, Cristóvão, Boaventura, & Vilar, 2019), flotation (Deliyanni, Kyzas, & Matis, 2017), ion exchange (Siu, Koong, Saleem, Barford, & McKay, 2016), precipitation (Rabii, Bidhendi, & Mehrdadi, 2012), solvent extraction (Kul & Oskay, 2015), membrane filtration (Yurekli, 2016;Zhu, Sun, Gao, Fu, & Chung, 2014), adsorption (Abbas et al, 2016;Inyang et al, 2016;Jain, Garg, Kadirvelu, & Sillanpää, 2016;Sarma, Gupta, & Bhattacharyya, 2019;Sizirici et al, 2018), and biological processes (Gunatilake, 2015) have been used for the removal of toxic materials from wastewaters. Among them, the adsorption process as an effective economical method has been reported for the removal of heavy metal ions and COD from aqueous solutions (Inyang et al, 2016;Jain et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of sewage sludge‐based carbon/TiO₂/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

Khosravi

Mehrdadi

Bidhendi

et al. 2019

Water Environment Research

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The removal of heavy metal ions and organic materials from wastewater due to their toxicity is necessary. In the present study, the titanium dioxide/zinc oxide (TiO2/ZnO) nanocomposite has been coated on the sewage sludge carbon (SSC) surface and its application was investigated for the adsorption of Ni(II), Cu(II), and chemical oxygen demands (COD) reduction from aqueous solutions and industrial wastewaters in Eshtehard, Iran. The effect of adsorption parameters in a single system such as TiO2/ZnO ratio, TiO2/ZnO concentration, pH, adsorbent dosage, contact time, ionic strength, temperature, and initial concentrations of Ni(II), Cu(II), and COD was investigated on the adsorption capacity of synthesized SSC/TiO2/ZnO adsorbent. The pseudo‐second order and Redlich–Peterson isotherm models were best described the kinetic and equilibrium data of Ni(II), Cu(II), and COD sorption. The maximum monolayer sorption capacities of Ni(II), Cu(II), and COD were found to be 62.3, 75.1, and 1,120.3 mg/g, respectively. The central composite design was used to investigate the interaction effects of pH and initial concentrations of Ni(II), Cu(II), and COD on the simultaneous removal of Ni(II), Cu(II), and COD from aqueous solutions in a ternary system. The potential of synthesized SSC/TiO2/ZnO adsorbent was investigated for Ni(II), Cu(II), and COD adsorption from industrial wastewaters of Iran. Practitioner points The novel sewage sludge carbon/TiO2/ZnO adsorbent was synthesized. Adsorption of Ni(II), Cu(II), and chemical oxygen demands (COD) from industrial wastewaters was investigated. Maximum Ni(II), Cu(II), and COD sorption capacities were 62.3, 75.1, and 1,120.3 mg/g. Simultaneous removal of Ni(II), Cu(II), and COD was investigated in a ternary system.

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“…One of the famous methods of heavy metals removal from wastewaters is electrocoagulation [7][8][9][10]. Due to this method it can be possible to remove the metal ions such as Cu 2+ , Cr 6+ , Cr 3+ , Ni 2+ and Zn 2+ .…”

Section: Introductionmentioning

confidence: 99%

Treatment of electroplating wastewaters

et al. 2020

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In this article, the specificity of wastewaters formed at electroplating plants and problem of its treatment is considered. The purpose of this research is to suggest the technological scheme of wastewater treatment, for one of the typical electroplating plants. Standard research methods were used: gravimetrical, photometrical and fluorimetrical methods of liquid analysis to achieve this goal. This article presents the method of electroplating wastewater treatment, based on chemical precipitation, including addition of the various reagents for removing heavy metals from the effluents. Because of the laboratory research, the effects of pollutants removal are 91% (total iron) and 94.6% (suspended solids). These effects were achieved by the technological scheme that includes averaging and mixing several technological effluents, their chemical precipitation with NaOH, Ca(OH)2 and flocculant during an hour.

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Removal of chromium (III) from wastewater by electrocoagulation method

Cited by 14 publications

References 34 publications

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Synthesis of sewage sludge‐based carbon/TiO₂/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

Treatment of electroplating wastewaters

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Removal of chromium (III) from wastewater by electrocoagulation method

Cited by 14 publications

References 34 publications

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Enhanced chromium removal from tannery wastewater through electrocoagulation with iron electrodes: Leveraging the Box-Behnken design for optimization

Synthesis of sewage sludge‐based carbon/TiO2/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

Treatment of electroplating wastewaters

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Synthesis of sewage sludge‐based carbon/TiO₂/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater