Application of as-synthesised MCM-41 and MCM-41 wrapped with reduced graphene oxide/graphene oxide in the remediation of acetaminophen and aspirin from aqueous system

Removal of cephalexin from artificial wastewater by mesoporous silica materials using Box-Behnken response surface methodology

“…6 and 7; the increasing of adsorbent dose leads to an increase in antibiotic adsorption. This behaviour is also expected as it was early reported [9,36] and also in the research conduct previously [9,36,49] that studied adsorption dyes and organic pollutant onto MCM-41 adsorbent, it was observed that the increase of MCM dosage resulted in increased contaminant removal [1,49]. The percentage of removal usually increases with the increase of adsorbent dosage to a limit of saturation of the adsorbent [1].…”

“…At pH 3.00, the amino group is protonated that generates a positive charge on the antibiotic. The negative charge of MCM-41 electrically attracts the positive charge of the antibiotic at pH 3.00 since the pH zpc is 2.29 [36]. Therefore, at pH 3.00, MCM-41 presents a superficial negative charge that attracts the cephalexin species at 3.0.…”

“…Various adsorbents have been recommended for the removal of pharmaceuticals such as activated carbon [18,19], zeolites [34], clays [35] and mesoporous silica [36,37]. Among mesoporous silica, the MCM-41 silica is a novel mesoporous that presents a large surface area and nanometer-sized pores (from 2.00 to 5.00 nm), high surface area (up to 1200 m 2 g -1 ), and large and identical pore size, tunable pore structure and environmental compatibility [38].…”

Functionalized Graphene-Based Materials as Innovative Adsorbents of Organic Pollutants: A Concise Overview

“…In this sense, Khan et al (2017) evaluated different adsorbent-adsorbate interaction behaviors involving pharmaceuticals. Pharmacological compounds, such as levofloxacin (Sun et al 2018;Dong et al, 2015), ciprofloxacin (Rostamian and Behnejad, 2018;Wang et al, 2016b;Fei et al, 2016;Ma et al, 2015), dorzolamide (Kyzas et al, 2014), tetracycline (Zhu et al, 2018;Lin et al, 2013;, ibuprofen (Banerjee et al, 2016), paracetamol (Shan et al, 2017), aspirin (Akpotu and Moodley, 2018;Al-Khateeb et al, 2014), amoxicillin (Kerkez-Kuyumcu et al 2016), among others, have had their adsorption onto graphene-based nanomaterials evaluated in several studies reported in the literature, as shown in Table 2. Different interaction natures between pharmaceuticals and GO are shown in Figure 6 and Figure 7a-d. π−π interactions, hydrogen bonding and hydrophobic interactions are present in the mechanisms of several compounds.…”

“…The most toxic and dangerous organic pollutants discharged into the environment, which have been object of study for adsorption onto graphene-based nanomaterials, are listed as follows: organic dyes (Das et al, 2018;Ganesan et al, 2018), polycyclic aromatic hydrocarbons , pharmaceuticals (Akpotu and Moodley, 2018;Rostamian and Behnejad, 2018), pesticides Maliyekkal et al, 2013), herbicides Wu et al, 2015), oil-derived products (Huang and Yan, 2018;Xia et al, 2018;Xiao et al, 2018) and volatile organic compounds (VOCs) . These compounds frequently present aromatic rings in their structure, hence they have the property to degrade and deliver carcinogenic and mutagenic products in water bodies and the atmosphere Carvallho et al, 2016).…”