Nanoscale zero-valent iron-impregnated agricultural waste as an effective biosorbent for the removal of heavy metal ions from wastewater

Kumar, P. Senthil; Saravanan, A.; Rajan, P Sundar; Yashwanthraj, M.

doi:10.1186/s40689-016-0014-5

Cited by 18 publications

(11 citation statements)

References 38 publications

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“…At last, ferrous ion was impregnated on to the RSS. The reduction of ferrous ion to ZVI was explained by the following equation [35]:

2 {normalFe}_{false(aq false)}^{2 +} + {normalBH}_{4 false(aq false)}^{-} + 2 {normalH}_{2} O + support false\to \frac{2 F {normale}^{normalo}}{suppor {normalt}_{false(s false)}} + {BO}_{2 (normalaq)}^{-} + 4 H_{(normalaq)}^{+} + 2 H_{2} (normalg)

…”

Section: Methodsmentioning

confidence: 99%

“…At last, ferrous ion was impregnated on to the RSS. The reduction of ferrous ion to ZVI was explained by the following equation [35]:…”

Section: Nzvi-rss Preparation and Characterisationmentioning

confidence: 99%

“…In a monetary perspective, the unutilised rubber seed shell (RSS) is impregnated with NZVI with the assistance of sonication process. This NZVI impregnated on a RSS (NZVI‐RSS) improves operation yet upgrades the soundness and lessens the hostility and troubles in isolating NZVI from treated effluent [35, 36].…”

Section: Introductionmentioning

confidence: 99%

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Sorption of Cu(II) ions by nano‐scale zero valent iron supported on rubber seed shell

Prabu

Parthiban²,

Kumar³

et al. 2017

IET nanobiotechnol.

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This study focused on synthesising nano-scale zero valent iron (NZVI) impregnated on a low-cost agro-waste material, rubber seed shell (RSS), by borohydride reduction method. The characterisation studies of NZVI-RSS were performed by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. The adsorption execution of NZVI-RSS for Cu(II) ions evacuation from synthetic wastewater was explored by batch studies. The optimum condition for the present adsorption system is as follows: Cu(II) ion concentration = 25 mg/l; solution pH = 6.0; contact time = 30 min; NZVI-RSS dose = 3 g/l; temperature = 30°C. The sorption data were best portrayed by pseudo-first-order and Freundlich models. The outcomes demonstrated the multilayer sorption of Cu(II) ions by NZVI-RSS. The Langmuir capacity was observed as 48.18 mg/g. Thermodynamic parameters, ΔG°, ΔH° and ΔS° were ascertained, and it was watched that the adsorption system was unconstrained and exothermic. The sticking probability for Cu(II) ions by NZVI-RSS was found to be high at lower temperature. At long last, the research inquire about reasoned that NZVI-RSS has demonstrated unrivalled adsorption capacity. Also NZVI-RSS is thought to be really green and financially amicable support for wastewater treatment.

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“…At last, ferrous ion was impregnated on to the RSS. The reduction of ferrous ion to ZVI was explained by the following equation [35]:

2 {normalFe}_{false(aq false)}^{2 +} + {normalBH}_{4 false(aq false)}^{-} + 2 {normalH}_{2} O + support false\to \frac{2 F {normale}^{normalo}}{suppor {normalt}_{false(s false)}} + {BO}_{2 (normalaq)}^{-} + 4 H_{(normalaq)}^{+} + 2 H_{2} (normalg)

…”

Section: Methodsmentioning

confidence: 99%

“…At last, ferrous ion was impregnated on to the RSS. The reduction of ferrous ion to ZVI was explained by the following equation [35]:…”

Section: Nzvi-rss Preparation and Characterisationmentioning

confidence: 99%

See 1 more Smart Citation

Sorption of Cu(II) ions by nano‐scale zero valent iron supported on rubber seed shell

Prabu

Parthiban²,

Kumar³

et al. 2017

IET nanobiotechnol.

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“…[ 6 ] Nickel (Ni) ions can trigger severe health problems, that is, renal disturbances, allergies, infertility, lung cancer, hepatitis, dermatitis, gingivitis, insomnia, nausea, and stomatitis. [ 7 ] Cadmium (Cd) is the most toxic pollutant which can damage lungs, kidneys, and liver. [ 8 ] Similarly, cobalt (Co), copper (Cu), manganese (Mn), iron (Fe), selenium (Se), zinc (Zn), and strontium (Sr) are directly considered to be toxic to biota when present is excessive quantities in the environment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Mechanism, and Performance Assessment of Zero‐Valent Iron for Metal‐Contaminated Water Remediation: A Review

Ullah

Faiz

Leng

2020

CLEAN Soil Air Water

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Recently, increased industrial and agriculture activities have resulted in toxic metal ions, which has increased public concern about the quality of surface and groundwater. Various types of physical, biological, and chemical approaches have been developed to remove surface and groundwater metal ions contaminants. Among these practices, zero‐valent iron (ZVI) is the most studied reactive material for environmental clean‐up over the last two decade and so. Although ZVI can remove the contaminants even more efficiently than any other reactive materials. However, low reactivity due to its intrinsic passive layer, narrow working pH, and the loss of hydraulic conductivity due to the precipitation of metal hydroxides and metal carbonates limits its wide‐scale application. The aim of this work is to document properties, synthesis, and reaction mechanism of ZVI for the treatment of metal ions from the surface and groundwater in recent 10 years (2008–2018). So far, different modified techniques such as conjugation with support, bimetal alloying, weak magnetic field, and ZVI/oxidant coupling system have been developed to facilitate the use of ZVI in various environmental remediation scenarios. However, some challenges still remain to be addressed. Therefore, development and research in this field are needed to overcome or mitigate these limitations.

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“…Nano zero-valent ironimpregnated (NZVI) has several advantageous with respect to removal of heavy metal from wastewater such as extreme removal capacity, large surface area, high reactivity and easy solid-liquid separation [28][29][30][31][32]. Recent investigations indicated that NZVI can be supported by surface stabilisers like polyvinyl alcohol [33], resin [34], activated carbon fibre [35], Chitosan [36], orange peelpith [29], pumice [32], cashew nut shell (CNS) [37,38] etc., to enhance their stability and dispersibility.…”

Section: Introductionmentioning

confidence: 99%

Nano‐zero valent iron impregnated cashew nut shell: a solution to heavy metal contaminated water/wastewater

Kumar¹,

Nair²,

Ramaswamy³

et al. 2018

IET nanobiotechnol.

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The present research is focused on the removal of Zn(II) ions from aqueous solution using nano zero-valent iron impregnated cashew nut shell (NZVI-CNS). The present system was investigated in batch mode operation. NZVI-CNS was prepared by the liquid-phase reduction process. The results showed that the NZVI-CNS exhibited superior adsorption capacity for the removal of Zn(II) ions. Adsorption isotherm and kinetic models were applied to explain the nature of the adsorption process. Adsorption kinetic data followed the pseudo-first order kinetic model. Moreover, the equilibrium adsorption data were best fitted with a Freundlich model. Langmuir monolayer adsorption capacity was calculated as 94.46 mg of Zn(II) ions/g of NZVI-CNS. The thermodynamic parameters explain that the present adsorption system was measured as feasible and spontaneous. This newly prepared adsorbent can be successfully applied for the different industrial wastewater treatment. Finally, the exploration asks about contemplated that NZVI-CNS has exhibited unrivalled adsorption limit. Additionally, NZVI-CNS is believed to be extremely green and monetarily neighbourly help for wastewater treatment. The results indicate that the feasible approach could be applied in agricultural waste biomass materials for the productive expulsion of heavy metals from aqueous solution and reusing agricultural wastes to facilitate their disposal problem.

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Nanoscale zero-valent iron-impregnated agricultural waste as an effective biosorbent for the removal of heavy metal ions from wastewater

Cited by 18 publications

References 38 publications

Sorption of Cu(II) ions by nano‐scale zero valent iron supported on rubber seed shell

Sorption of Cu(II) ions by nano‐scale zero valent iron supported on rubber seed shell

Synthesis, Mechanism, and Performance Assessment of Zero‐Valent Iron for Metal‐Contaminated Water Remediation: A Review

Nano‐zero valent iron impregnated cashew nut shell: a solution to heavy metal contaminated water/wastewater

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