Adsorption of salicylic acid on bentonite and kaolin and release experiments

Bonina, Francesco; Giannossi, Maria Luigia; Medici, Luca; Puglia, Carmelo; Summa, Vito; Tateo, Fabio

doi:10.1016/j.clay.2006.07.008

Cited by 72 publications

(41 citation statements)

References 18 publications

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“…Clays are commonly used as excipients, shielding and adsorbent agents, in the domain of pharmaceuticals' production [29,30]. In their natural forms, clays have no affinity for adsorption of organics.…”

Section: Introductionmentioning

confidence: 99%

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The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin

Rakić¹,

Rajić²,

Daković³

et al. 2013

Microporous and Mesoporous Materials

102

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Section: Introductionmentioning

confidence: 99%

“…Clay raw materials are often used because of their properties such as high resistance to atmospheric conditions, geochemical purity, easy access to their deposits and low price [27][28][29][30]. Clays are commonly used as excipients, shielding and adsorbent agents, in the domain of pharmaceuticals' production [29,30].…”

Section: Introductionmentioning

confidence: 99%

The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin

Rakić¹,

Rajić²,

Daković³

et al. 2013

Microporous and Mesoporous Materials

102

View full text Add to dashboard Cite

“…octahedral at clay edges, indicating a sorption mechanism similar to NA (Wu et al 2013a). The interactions between SA and clays showed that most of the drug uptake by bentonite occurred within the first hour, whereas the sorption by kaolin started relatively later (4 days after the treatment) and achieved equilibrium after 19 days (Bonina et al 2007). …”

Section: Introductionmentioning

confidence: 95%

What happens when pharmaceuticals meet colloids

et al. 2015

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Pharmaceuticals (PCs) have been widely detected in natural environment due to agricultural application of reclaimed water, sludge and animal wastes. Their potential risks to various ecosystems and even to human health have caused great concern; however, little was known about their environmental behaviors. Colloids (such as clays, metal oxides, and particulate organics) are kind of substances that are active and widespread in the environment. When PCs meet colloids, their interaction may influence the fate, transport, and toxicity of PCs. This review summarizes the progress of studies on the role of colloids in mediating the environmental behaviors of PCs. Synthesized results showed that colloids can adsorb PCs mainly through ion exchange, complexation and non-electrostatic interactions. During this process the structure of colloids and the stability of PCs may be changed. The adsorbed PCs may have higher risks to induce antibiotic resistance; besides, their transport may also be altered considering they have great chance to move with colloids. Solution conditions (such as pH, ionic strength, and cations) could influence these interactions between PCs and colloids, as they can change the forms of PCs and alter the primary forces between PCs and colloids in the solution. It could be concluded that PCs in natural soils could bind with colloids and then co-transport during the processes of irrigation, leaching, and erosion. Therefore, colloid-PC interactions need to be understood for risk assessment of PCs and the best management practices of various ecosystems (such as agricultural and wetland systems).

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“…Kaolinite is often used as an active pharmaceutical ingredient and excipient in pharmaceutics (Carretero andPozo, 2009, 2010). Due to the low cation exchange capacity (always lower than 10 mmol/100 g) (Ma and Eggleton, 1999) and the low specific surface area of kaolinite (approximately 10 to 20 m 2 /g) (Castellano et al, 2010), the drugs only adsorbed onto the external surfaces (Bonina et al, 2007;Mallick et al, 2008), and did not intercalate into the hydrogenbonded interlayer. This drawback of a low kaolinite loading capacity, has severely limited the application of kaolinite as a drug carrier in pharmaceutics.…”

Section: Introductionmentioning

confidence: 99%