Zinc recovery from purified electric arc furnace dust leach liquors by chemical precipitation

Xanthopoulos, Panagiotis; Agatzini-Leonardou, S.; Oustadakis, P.; Tsakiridis, P.E.

doi:10.1016/j.jece.2017.07.023

Cited by 42 publications

(14 citation statements)

References 13 publications

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“…From the observation in Table 7 an immediate conclusion is drawn, the parameters that are found in greater abundance in the first leaching is the value of the CrTotal although lower in the first balance due to the decrease in PH and the consequent partial dilution, since in the 2nd leaching it grows instead of decreasing. As expected in the second leaching, there is generally a decrease in the concentration of leached species [34,35].…”

Section: Leaching Analysissupporting

confidence: 77%

Mechanical-strength characteristics of concrete made with stainless steel industry wastes as binders

Cintas

Barnett²,

Pérez-García

et al. 2019

Construction and Building Materials

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Section: Leaching Analysissupporting

confidence: 77%

Mechanical-strength characteristics of concrete made with stainless steel industry wastes as binders

Cintas

Barnett²,

Pérez-García

et al. 2019

Construction and Building Materials

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“…The chemical precipitation (CP) removal method is mostly known to be employed for removing heavy metals from wastewater because of its cost-effective and simple operating process. [59][60][61] CP method consists of adjustment of the pH of wastewater to basic conditions at the beginning, the precipitating agent is then added, and the reaction of heavy metal ions with agents lead to insoluble precipitates. After this step, sedimentation, or filtration is used to separate precipitates.…”

Section: Chemical Precipitation and Ion Exchangementioning

confidence: 99%

Recent Progress, Challenges, and Opportunities of Membrane Distillation for Heavy Metals Removal

Aijaz

Karim

Omar

et al. 2022

The Chemical Record

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Water is essential for the presence of life on this earth. However, water contamination due to the presence of heavy/toxic metals is one of the serious environmental issues for living beings. Several methods have been devoted to separating or removing those heavy metals from wastewater. Among them, membrane distillation (MD) has become one of the most attractive approaches due to its higher rejection rate than processes driven by pressure, lower energy consumption than traditional distillation processes. MD has gained significant attention for removing heavy metals than other techniques like ion exchange and adsorption in the last two decades. This review provides insight knowledge to the reader and focuses on how heavy metals impact humans and the environment, sources of heavy metals, current and especially removal methods using the MD method. Moreover, recent studies, challenges, and opportunities on MD membrane modules and heavy metal removal systems are discussed. More importantly, in this review, we have identified the gaps and opportunities that are required for enhancing the MD approach and its practical suitability for heavy metal removals. MD module and system showed high performance, proving their possible applications to remove heavy metal ions in water/wastewater treatment.

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“…The final residue could be used in the cement industry. Instead of electrowinning, the zinc in the pregnant leachates can be precipitated [121].…”

Section: Sulfuric Acid Leachingmentioning

confidence: 99%

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Binnemans

Jones

Fernández

et al. 2020

J. Sustain. Metall.

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The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge. The review highlights that dusts and sludges are harder to valorize than slags, while the internal recycling of dusts and sludges in steelmaking is inhibited by their high zinc content. Although the objectives of treating BF sludges, BOF sludges, and EAF dust are similar, i.e., the removal of zinc and the generation of an Fe-rich residue to be returned to the steel plant, these three classes of by-products have specific mineralogical compositions and zinc contents. Because wide variations in the mineralogical composition and zinc content occur, it is impossible to develop a one-size-fits-all flow sheet with a fixed set of process conditions. The reason for the interest in EAF dust is its high zinc content, by far the highest of all steel by-products. However, EAF dust is usually studied from the perspective of the zinc industry. There are not only different concentrations of zinc, but also variations in the all-important ZnO/ZnFe2O4 (zincite-to-franklinite) ratio. In many chemical processes, only the ZnO dissolves, while the ZnFe2O4 is too refractory and reports to the residue. It only dissolves in concentrated acids, or if the dust is pre-treated, e.g., with a reductive roasting step. The dissolution of ZnFe2O4 in acidic solutions also brings significant amounts of iron in solution. Finally, due to its high potassium chloride content, sinter-plant dust could be a source of potassium for the fertilizer industry. Graphical Abstract

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Zinc recovery from purified electric arc furnace dust leach liquors by chemical precipitation

Cited by 42 publications

References 13 publications

Mechanical-strength characteristics of concrete made with stainless steel industry wastes as binders

Mechanical-strength characteristics of concrete made with stainless steel industry wastes as binders

Recent Progress, Challenges, and Opportunities of Membrane Distillation for Heavy Metals Removal

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

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