Adsorption of selected herbicides from aqueous solutions on activated carbon

Abstract

The adsorption of MCPA and 2,4-D on the activated carbon Filtrasorb 300 was studied. The adsorption isotherms of herbicides from aqueous solutions were measured over a wide range of solute concentrations and at different temperatures. The experimental equilibrium data were analyzed by the Langmuir-Freundlich isotherm taking into account the energetic heterogeneity of adsorption system. The effect of temperature and herbicide properties on its uptake was discussed. The thermal analysis was applied in order to find the differences in herbicide interactions with carbon surface. The kinetic dependences were measured and the relations between solute properties and adsorption rate were discussed.

Cyclic process of simazine removal from waters by adsorption on zeolite H-Y and its regeneration by thermal treatment

“…On the other hand, serious health effects may result to nervous system, eyes, brain and bone marrow and even carcinogenic, mutagenic and teratogenic effects may be promoted [1]. Harmfulness of agrochemicals is further enhanced by their mobility and persistence in the aqueous media [2].…”

“…The increasing concern is documented by many papers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], proposing various methods for agrochemicals removal: adsorption, sedimentation, membrane filtration, oxidation, photochemical or photocatalytic degradation, biochemical decomposition, and coagulation.…”

Adsorptive removal of herbicides from water over nitrogen-doped carbon obtained from ionic liquid@ZIF-8

“…Research on Cancer and the United States Environmental Protection Agency [7,8]. DUR and 2,4-D readily enter surface and ground waters through runoff and, as a result, are commonly detected in the waters of many countries throughout the world [9].…”

Modified halloysite as an adsorbent for prometryn from aqueous solutions

“…For many years, the studies on the use of adsorbents for the removal of various herbicides from water have been conducted. Common adsorbents in such methods are carbon activated in different ways (Tae-Young et al, 2005;Chingombe et al, 2006;Derylo-Marczewska et al, 2010;Gupta et al, 2011;Hotton et al, 2011;Moreno-Castilla et al, 2011) and nanotubes (Pyrzynska et al, 2007;Paul et al, 2011a;Pyrzynska, 2011). Adsorption of pesticides was also studied on zeolites (Senthilkumaar et al, 2010;Yonli et al, 2012), montmorillonites (Chang et al, 2005;Akçay et al, 2006;Bansal, 2009;Park et al, 2011), sepiolites (Cardoso and Valim, 2006), and silica gels (Prado and Airoldi, 2001;Prado et al, 2004;Akçay et al, 2005;Kovaios et al, 2011;Paul et al, 2011b;Koner et al, 2012).…”