2013
DOI: 10.15376/biores.8.1.1147-1165
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Optimization of the Removal of Copper(II) Ions from Aqueous Solution on Chitosan and Cross-Linked Chitosan Beads

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Cited by 50 publications
(19 citation statements)
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“…O valor de 1/n estando entre 0 e 1, o processo de adsorção é descrito por quimissorção. Quanto mais próximo de 0, o valor de 1/n, mais heterogênea é a superfície da fase sólida 18 .…”
Section: Resultsunclassified
“…O valor de 1/n estando entre 0 e 1, o processo de adsorção é descrito por quimissorção. Quanto mais próximo de 0, o valor de 1/n, mais heterogênea é a superfície da fase sólida 18 .…”
Section: Resultsunclassified
“…Carvalho 32 encontrou um valor de qmax, usando o modelo de Langmuir, de 5,9185 mg de íons Cu(II) por grama de esfera de quitosana (GD = 78%) e no mesmo trabalho encontrou 6,7317 mg de íons Cu(II) por grama de esfera de quitosana com uma espécie de bactéria imobilizada. Ghaee et al 33 34 estudaram isotermicamente a adsorção de íons cobre(II) em grânulos esféricos de quitosana (75% < GD < 85%) e quitosana reticulada com glutaraldeído. Os autores encontraram valores de capacidade máxima de adsorção de 7,0025 mg g -1 , para os grânulos de quitosana, e de 8,6720 mg g -1 , para os grânulos de quitosana reticulada.…”
Section: Resultsunclassified
“…Hence, it was thought of important to study the effect of pH on the removal of Cu(II). Patrulea et al 5 reported that the protonation of the primary amine groups with positive charge in the acidic media effects the adsorption process by electrostatic repulsion of the cationic Cu(II) ions present in the medium. According to previously reported fi ndings, precipitation of Cu(II) ions as copper hydroxides, such as Cu(OH) + , Cu(OH) 2 , Cu(OH) 3 − , Cu(OH) 4 2− occurs at pH values higher than 5 and beyond this point the adsorption effi ciency results could be hampered because of the higher concentration of OH − ions in the medium 39 .…”
Section: Effect Of Phmentioning
confidence: 99%
“…Even though trace amounts of copper is nutritious, the higher concentrations exceeding the limit 1.5 mg L -1 can cause many severe diseases such as liver and kidney damage, intestinal distress and stomach ailments, cancer, nausea, vomiting, headache, diarrhea, respiratory diffi culties 3 . Excess of copper (II) leads to different types of cancers since it can be deposited in the brain, skin, liver and pancreas, and fi nally leading to death 4, 5 . In addition, Cu(II) in acidic pH can cause toxicological concerns to fi sh and other aquatic life even in trace quantities 6 .…”
mentioning
confidence: 99%