Introduction
The level of environmental pollution in the environment is increasing daily due to the rapid urbanization and the continuous population world increasing. [1]. There have been numerous reports of a great variety of organic compounds being detected at low concentrations (ng L-1) in liquid effluent (water, wastewater, groundwater or even drinking water). These compounds appears as a new class of organic pollutants environmental (emerging contaminants), coming from pharmaceutical, personal care products, herbicides, dyes and organics compounds [2]. This emerging contaminant, such as alkyl-phenols, analgesic, antibiotic, antidepressant, antineoplastic, beta blocker, hormones/steroids can cause adverse health effects in humans and/or organism. Therefore is important to the society to protect water supplies from acute contamination, so an effective method to eliminate this environmental pollutant must be developed.
Adsorption is a method simplest and effective to remove pollutants in liquid effluent or wastewater. Carbon nanomaterials present great adsorption capacities for a huge spectrum of organic and inorganic compounds [3, 4]. Different structures of carbon nanomaterials are considered: carbon nanotubes (single or multiwalled nanotubes), platelet, fishbone, ribbon, carbon nanofibers etc., being their capacity adsorption different. This research shows a preliminary characterization of different nanomaterials which will be used as organic adsorbent agent.
Materials and methods
Raman spectroscopy, FTIR, SEM, TEM, Z potential and AFM were used to characterize carbon nanomaterials studied: carboxylic multiwalled carbon nanotubes (c-MWCNT; multiwalled carbon nanotubes (MWCNT); activated carbon (AC); carbon nanofibers (CNF) and graphene oxide.
Result and discussion
Figure 1 shows the variation of potential Z as a function of pH, both in aqueous solution and in 10-3 M KCl solution. Table 1 shows the values of the isoelectric point for each nanomaterial. The morphological aspects of the studied nanomaterials observed by TEM is showed in Figure 2.
References
[1] Bao C., Fang C.L. (2012).Water Resource Management 26, 531–552.
[2] Saxena G., Chandra R., Bharagava R.N. (2017). Reviews of environmental contamination and toxicology 240, 31-69.
[3] Kyzas G.Z., Matis K.A. (2015). Journal of Molecular Liquids, 203,159-168.
[4] Zyzas G.Z., Fu J., Lazaridis N.K., Bikiaris D.N., Matis K.A. (2015). Journal of Molecular Liquids, 209, 87-93.
