Stevensite-based geofilter for the retention of tetracycline from water

Fernández, Raúl; Ruiz, A.; García‐Delgado, Carlos; González-Santamaría, Daniel E.; Antón-Herrero, Rafael; Yunta, Felipe; Poyo, Caudia; Hernández, Andrea; Eymar, E.; Cuevas, Jaime

doi:10.1016/j.scitotenv.2018.07.120

Cited by 27 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The clays exhibited similar behavior and characteristics to that of synthetic stevensite clay, suggested by the peaks at 2θ= 5.8° (12.8-15 Å), 19.8° (4.57 Å), and 34.6° (2.61 Å) [7,15,28]. The values found were also similar to those of natural stevensite clay, as observed in other studies [29][30][31]. The refraction at 2θ=60.6° (1.53 Å) observed is typical of trioctahedral smectite clay.…”

Section: Resultssupporting

confidence: 86%

Simple and fast process using hydrochloric acid for producing synthetic zinc-rich stevensite

Carvalho¹,

B²,

Silva-Valenzuela³

et al. 2022

Cerâmica

View full text Add to dashboard Cite

In the last decades, clays have been used in sectors such as health and cosmetics. This requires products that are increasingly pure and present homogeneous properties, hardly found in natural clays. The use of synthetic clays can be a solution. For this, it is necessary to explore techniques for their production. The main focus of this study was to synthesize a smectite clay in a simple, fast and economic way at low temperature and pressure, called static and dynamic methods. To regulate the pH of the reaction and bring it closer to the ideal synthesis conditions, two different acids were used: nitric acid (the most widely used in the literature) and hydrochloric acid (more accessible and cheaper). The results showed characteristics of uniform crystalline material with a porous structure similar to that of the smectite group. Small particle sizes of approximately 100 nm were observed by scanning electron microscopy. Stevensite clay was obtained by both synthesis methods using two different acids; the static method with hydrochloric acid stood out. The greater practicality in its development provides a more viable option for large-scale industrial production.

show abstract

Section: Resultssupporting

confidence: 86%

Simple and fast process using hydrochloric acid for producing synthetic zinc-rich stevensite

Carvalho¹,

B²,

Silva-Valenzuela³

et al. 2022

Cerâmica

View full text Add to dashboard Cite

show abstract

“…Among the few studies that have tested the dynamic adsorption of PPs onto clays, their adsorbent potential was systematically demonstrated. For example, the adsorption of tetracycline (zwitterionic at the investigated pH) onto stevensite under dynamic experiments reached three times the CEC of the raw clay mineral, highlighting the combined effect of cation exchange and other interaction mechanisms in such conditions (Fernández et al, 2018). Another study, performed with lower starting concentrations (i.e.…”

Section: Fixed-bed Adsorption Of Pps Onto Raw and Modified Clay Mineralsmentioning

confidence: 89%

Raw and modified clays and clay minerals for the removal of pharmaceutical products from aqueous solutions: State of the art and future perspectives

Thiebault

2019

Critical Reviews in Environmental Science and Technology

View full text Add to dashboard Cite

The occurrence of pharmaceutical products (PPs) within environmental compartments challenges the scientific community and water treatment operators to find suitable and practicable removal solutions. Clay minerals are among the oldest and cheapest adsorbents used for the removal of organic and inorganic pollutants. However, despite their significant adsorption properties, little is known about their potential to remove organic contaminants such as pharmaceutical products from wastewater effluents. Hence, based on the latest published articles this review aims to standardize the adsorption properties of clay minerals for the removal of PPs. Specifically, the charge state of PPs appears to play a key role in their adsorption mechanism. In order to overcome the limitations of batch experiments (i.e. idealized solutions, static conditions) and design of a field solution, the impact of external parameters on the adsorption capacities of clay minerals is reviewed. The effect of thermal treatment and acid activation of clay minerals is also assessed in order to better understand the consequences of such modifications on the adsorption properties of clay-based adsorbents. Finally, even if most authors agree on the potential of clay-based adsorbents for the removal of PPs from wastewater, there remain significant gaps in the existing literature that need to be filled, with the aim of forecasting the real potential of clay-based treatment for the removal of pharmaceutical products at industrial scale.

show abstract

“…As a relatively inexpensive adsorbent, clay minerals have attracted much attention due to their natural sources, widespread existence, and unique characteristics (Anastopoulos et al, 2018). In order to reduce the cost of recyclable adsorbents, Fernández et al (2018) developed a geofilter consisting of stevensite and sand, and studied its adsorption capacity for tetracycline in water. At tetracycline concentration of 1 g/L, NaNO 3 concentration of 0.1 mol/L, and pH 7, the adsorption capacity of tetracycline on geofilter can reach 590 mg/g.…”

Section: Othermentioning

confidence: 99%

Emerging pollutants—Part II: Treatment

Liu

Zhang

Chang

2019

Water Environment Research

View full text Add to dashboard Cite

Recently, emerging pollutants (EPs) have been frequently detected in urban wastewater, surface water, drinking water, and other water bodies. EPs mainly usually include pharmaceuticals and personal care products, endocrine-disrupting chemicals, antibiotic resistance genes, persistent organic pollutants, disinfection by-products, and other industrial chemicals. The potential threat of EPs to ecosystems and human health has attracted worldwide attention. Therefore, how to treat EPs in various water bodies has become one of the research priorities. In this paper, some research results on treatment of EPs published in 2018 were summarized.

show abstract

Stevensite-based geofilter for the retention of tetracycline from water

Cited by 27 publications

References 37 publications

Simple and fast process using hydrochloric acid for producing synthetic zinc-rich stevensite

Simple and fast process using hydrochloric acid for producing synthetic zinc-rich stevensite

Raw and modified clays and clay minerals for the removal of pharmaceutical products from aqueous solutions: State of the art and future perspectives

Emerging pollutants—Part II: Treatment

Contact Info

Product

Resources

About