Evaluation of the Properties of Diatomaceous Earth in Relation to Their Performance in the Removal of Heavy Metals from Contaminated Effluents

Marín-Alzate, Natalia; Tobón, Jorge Iván; Bertolotti, Bruno; Quintana, María; Flores, Elena

doi:10.1007/s11270-021-05045-y

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Nanoporous BSi is another solution to reduce potentially toxic elements (PTEs) bioavailability [501] and plant uptake [502]. Nanoporous silica materials immobilize PTEs, due to their high active surface area [63].…”

Section: Agricultural Use Of the Recovered Biofertilizersmentioning

confidence: 99%

Closing the Nutrient Loop—The New Approaches to Recovering Biomass Minerals during the Biorefinery Processes

Constantinescu-Aruxandei

Oancea

2023

IJERPH

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The recovery of plant mineral nutrients from the bio-based value chains is essential for a sustainable, circular bioeconomy, wherein resources are (re)used sustainably. The widest used approach is to recover plant nutrients on the last stage of biomass utilization processes—e.g., from ash, wastewater, or anaerobic digestate. The best approach is to recover mineral nutrients from the initial stages of biomass biorefinery, especially during biomass pre-treatments. Our paper aims to evaluate the nutrient recovery solutions from a trans-sectorial perspective, including biomass processing and the agricultural use of recovered nutrients. Several solutions integrated with the biomass pre-treatment stage, such as leaching/bioleaching, recovery from pre-treatment neoteric solvents, ionic liquids (ILs), and deep eutectic solvents (DESs) or integrated with hydrothermal treatments are discussed. Reducing mineral contents on silicon, phosphorus, and nitrogen biomass before the core biorefinery processes improves processability and yield and reduces corrosion and fouling effects. The recovered minerals are used as bio-based fertilizers or as silica-based plant biostimulants, with economic and environmental benefits.

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Section: Agricultural Use Of the Recovered Biofertilizersmentioning

confidence: 99%

Closing the Nutrient Loop—The New Approaches to Recovering Biomass Minerals during the Biorefinery Processes

Constantinescu-Aruxandei

Oancea

2023

IJERPH

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“…In addition, Louie [11] showed that the commonly used filter aids are diatomite and perlite. Diatomite, also known as diatomaceous earth, has been used as a filter aid for nearly a century [16][17][18][19][20][21]. Sulfuric acid plants usually use diatomite earth as a filter aid, but it is suspected that the high silica content of the inorganic diatomaceous earth can lead, through abrasion, to an early degradation of the filter cloths, so that the sulfur impurities are not properly removed anymore or the units' filter times need to be reduced.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Molten Sulfur Filtration during Sulfuric Acid Manufacturing for Phosphate Fertilizer Production in Morocco with Cellulose-Based Filter Aids

Essakhraoui,

Nyassi,

Boukhair

et al. 2023

Applied Sciences

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The filtration of liquid sulfur is a key operation in the production of sulfuric acid that is used for phosphate fertilizer production in Morocco and elsewhere. The purpose of the filtration process is to remove solid impurities from liquid sulfur, which could clog the sulfur burner spray nozzles, leading to the reduction of the lifetime of the sulfuric acid production unit. The standard life cycle operation for sulfuric acid units is 24 months, while due to clogging, this lifetime can be reduced to less than 18 months, which is obviously a tremendous economic disadvantage. In the liquid sulfur filtration process, a precoat made of diatomaceous earth is usually used. In this work, the performance of a standard diatomaceous earth filter aid was compared to the performance of two commercial, inexpensive, cellulose-based filter aids, namely, FILTER-900 and FILTER-1100, which are distinguished by their respective Dalton numbers (900 Da and 1100 Da). The experiments were realized using an industrial sulfur filtration device, and the results indicated that all three of the filter aids yielded similar performance in terms of the impurity content in the filtered liquid sulfur. The cellulose-based filter aids did, however, show a lower specific filter-aid consumption, accompanied by an increase in operating cycle times from 24 to 72 h. In addition, the use of the cellulose-based filters allowed for the relatively easy removal of the filter cake without damaging the filter cloths (which is often an issue with the diatomaceous earth filter aids). It was further noticed that the filtered liquid sulfur obtained using the cellulose-based filter aids remained uncontaminated by silicate, which is one of the main elements that can result in clogging of the sulfur spray nozzles. The first experimental data presented here are therefore promising, and further industrial tests as well as economic analysis for using cellulose-based filter aids in industrial sulfuric acid production are encouraged.

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Mitigation of OMW toxicity toward Enchytraeus albidus with application of additives

Trigui

Hackenberger

Stjepanović

et al. 2022

Environ Sci Pollut Res

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Evaluation of the Properties of Diatomaceous Earth in Relation to Their Performance in the Removal of Heavy Metals from Contaminated Effluents

Cited by 10 publications

References 26 publications

Closing the Nutrient Loop—The New Approaches to Recovering Biomass Minerals during the Biorefinery Processes

Closing the Nutrient Loop—The New Approaches to Recovering Biomass Minerals during the Biorefinery Processes

Enhancing Molten Sulfur Filtration during Sulfuric Acid Manufacturing for Phosphate Fertilizer Production in Morocco with Cellulose-Based Filter Aids

Mitigation of OMW toxicity toward Enchytraeus albidus with application of additives

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