Adsorption and thermodynamic studies of Cu(II) and Zn(II) on organofunctionalized-kaolinite

Thermodynamics of the nickel and cobalt removal from aqueous solution by layered crystalline organofunctionalized barium phosphate

“…Similarly, natural clays [10,11], crysotile fibres [12], synthetic phyllosilicate [13], silicic acids [14], hydroxyapatite [15], and inorganic phosphates [16] are also very useful to be anchored.…”

“…The profitability of these chemically modified polymeric materials depends not only on the availability of the pendant molecules covalently bonded to the inorganic network, but also to the characteristics of the basic centres, in which the nitrogen atom is extensively used in many chemically immobilized surfaces [7][8][9][10][11][12][13][14][15][16][17]. One of the most useful properties associated with these chains is to explore the potential activity of the attached basic centres along the organic moieties for cation removal from aqueous and nonaqueous solutions, by obtaining the thermodynamic data of these cation/basic centre interactions at the solid/liquid interface [7][8][9][10]13,14,16].…”

Estudo da intercalação de compostos orgânicos em caulins na forma ácida

“…As camadas são mantidas juntas por um vértice em comum através de ligações hidrogênio entre os oxigênios dos tetraedros e as hidroxilas dos octaedros de alumínio [2,3]. Alguns autores afirmam que a capacidade de adsorção das argilas poderia ser melhorada através de modificações específicas baseadas em processos de intercalação com agentes orgânicos [4]. A alta área superficial, estabilidade química e mecânica, alta capacidade de troca catiônica (CTC), acidez de Brönsted e Lewis, entre outras, têm feito das argilas excelentes materiais de adsorção [5].…”

Performance of natural and modified smectite: kinetic and thermodynamics involving arsenic (V) adsorption

“…The plateau of the isotherm enables K L determination that reflected the affinity of the adsorbate on the surface. The b or N s value is the upper limit and represents the maximum adsorption, determined by the number of reactive surface reactive sites [16][17]. The coefficient of determination values (r 2 ) were used in order to find the degrees of fit of the isotherm adsorption and kinetic models with the experimental data [18], as defined by equation B:…”