Obtention and Characterization of Ferrous Chloride FeCl2·4H2O from Water Pickling Liquors

Alcaraz, Lorena; Sotillo, Belén; Marco, José F.; Fernández, Paloma; López, Félix A.

doi:10.3390/ma14174840

Cited by 6 publications

(3 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In all cases, the formation of highly crystalline halite (NaCl) was observed with reflections at 32° and 46° (2θ units). No peaks related to Fe(II) chloride were detected . Other peaks are detected and can be assigned to Fe hydroxides at 34–36° and 62–63°, especially in the chemical gardens generated with arginine in solution.…”

Section: Resultsmentioning

confidence: 92%

See 1 more Smart Citation

The Effect of the Presence of Amino Acids on the Precipitation of Inorganic Chemical-Garden Membranes: Biomineralization at the Origin of Life

et al. 2022

View full text Add to dashboard Cite

If life developed in hydrothermal vents, it would have been within mineral membranes. The first proto-cells must have evolved to manipulate the mineral membranes that formed their compartments in order to control their metabolism. There must have occurred a biological takeover of the self-assembled mineral structures of the vents, with the incorporation of proto-biological molecules within the mineral membranes to alter their properties for life’s purposes. Here, we study a laboratory analogue of this process: chemical-garden precipitation of the amino acids arginine and tryptophan with the metal salt iron chloride and sodium silicate. We produced these chemical gardens using different methodologies in order to determine the dependence of the morphology and chemistry on the growth conditions, as well as the effect of the amino acids on the formation of the iron-silicate chemical garden. We compared the effects of having amino acids initially within the forming chemical garden, corresponding to the internal zones of hydrothermal vents, or else outside, corresponding to the surrounding ocean. The characterization of the formed chemical gardens using X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis, and scanning electron microscopy demonstrates the presence of amino acids in these structures. The growth method in which the amino acid is initially in the tablet with the iron salt is that which generated chemical gardens with more amino acids in their structures.

show abstract

Section: Resultsmentioning

confidence: 92%

“…No peaks related to Fe(II) chloride were detected. 24 Other peaks are detected and can be assigned to Fe hydroxides at 34–36° and 62–63°, 25 especially in the chemical gardens generated with arginine in solution. These reflections can be seen also in samples generated with tryptophan in the tablet and in solution.…”

Section: Resultsmentioning

confidence: 99%

The Effect of the Presence of Amino Acids on the Precipitation of Inorganic Chemical-Garden Membranes: Biomineralization at the Origin of Life

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Thus, all the results obtained reveal that it is possible to obtain crystals of FeCl 2 . 4H 2 O of high purity and high stability from pickling liqueurs (Alcaraz et al, 2021) The crystallization technique is standard for the regeneration of pickling solutions with sulfuric acid, since at low temperature ferrous sulfate crystallizes very easily. Another alternative offered by crystallization is to add sulfuric acid to the spent pickling solution.…”

Section: Selective Metal Recovery Technologiesmentioning

confidence: 99%

Acid pickling of carbon steel

Anderez

López

2022

revmetal

View full text Add to dashboard Cite

This study reviews the possibilities of recovering the pickling waters from carbon and galvanised steel. Acid pickling with hydrochloric acid (HCl) is the most widely used chemical process to remove iron oxides from the metal surface without any significant attack on the steel itself. The acid pickling bath contains mainly ferrous chloride (FeCl2) produced by the reaction between the steel and free hydrochloric acid. However, zinc chloride (ZnCl2) is also found in the pickling of carbon steel parts prior to galvanisation, as the hooks and tools used to hang the carbon steel parts are also galvanised and reuse again polluting with Zn the pickling waters. Pickling water recovery or recycling technologies primarily seek the reuse of HCl in two ways. Partially by recovering the unreacted HCl or fully by breaking the FeCl2 bond through Pyrolysis technologies such as fluidised bed and spray roasting which in turn produces another iron oxide by-product. However, the most common by-product produced by pickling water recovery and recycling technologies is ferric chloride (FeCl3), as it is a coagulant widely used in wastewater treatment. However, if the pickling water contains ZnCl2 or other metals, the production of FeCl3 becomes unattractive and the pickling water is neutralised and deposited in landfill sites. This study also discusses a wide range of technologies capable of recovering all or part of the pickling water, including galvanic pickling water, that are usually excluded from circular economy strategies.

show abstract

A novel mechanochemical synthesis of ferromagnetic Fe3Al nanoparticles and preparation of its polyaniline nanocomposite

Mohammadi,

Kahani

2024

Intermetallics

View full text Add to dashboard Cite

Obtention and Characterization of Ferrous Chloride FeCl2·4H2O from Water Pickling Liquors

Cited by 6 publications

References 35 publications

The Effect of the Presence of Amino Acids on the Precipitation of Inorganic Chemical-Garden Membranes: Biomineralization at the Origin of Life

The Effect of the Presence of Amino Acids on the Precipitation of Inorganic Chemical-Garden Membranes: Biomineralization at the Origin of Life

Acid pickling of carbon steel

A novel mechanochemical synthesis of ferromagnetic Fe3Al nanoparticles and preparation of its polyaniline nanocomposite

Contact Info

Product

Resources

About