Katyonlar Varlığında Karışık Mineralli Kilin Zeta Potansiyeli

Yıl 2016, Cilt: 1 Sayı: 1, 14 - 21, 08.06.2016

Yeliz Yükselen-aksoy , Abidin Kaya

Öz

Bu çalışmada, karışık mineralli
kil (KMK) örneğinin Na⁺, Li⁺, Ca²⁺ tuz
katyonları ve Zn²⁺, Cu²⁺, Al³⁺ metal
katyonları varlığında zeta potansiyeli değerleri ölçülmüştür.  Genel sonuçlar incelendiğinde, zeta
potansiyeli değerlerinin iki değerlikli ve üç değerlikli katyonların varlığında
daha pozitif olduğu görülmektedir.  Metal
iyonların varlığında KKM’nin zeta potansiyeli davranışının benzer olduğu
görülmektedir. Metal iyonların konsantrasyonundaki artış, pH 7 civarına kadar
zeta potansiyelini pozitif değerlere doğru olarak arttırmakta, ve pH 7
civarında zeta potansiyeli pozitif değerler almaktadır. Metal iyonları
genellikle iki adet sıfır yüklü nokta (syn)
meydana getirmiştir. KKM’nin zeta potansiyel değerleri saf montmorillonit ve
saf kaolin ile karşılaştırılmıştır.

Anahtar Kelimeler

Elektrokinetik dekontaminasyon, karışık mineralli kil, sıfır yük noktası, zeta potansiyeli

The Zeta Potential of a Mixed Mineral Clay in the Presence of Cations

Öz

In the present study, zeta potential of a mixed mineral
clay (MMC) was measured in the presence of salt cations; Na⁺, Li⁺
and Ca²⁺ and metal cations; Zn²⁺, Cu²⁺, and Al³⁺.  Results reveal that the zeta potential of the
MMC, in general, becomes more positive in the presence of divalent and
trivalent cations.  In presence of metal
ions the zeta potential of the MMC has similar trends, i.e., increase in the
concentration of these ions causes an increase in the zeta potential to the
positive values up to around pH 7, and then it becomes positive; and produces
generally two apparent pzcs (point of zero charges).  The zeta potential values of the MMC were
compared with those of pure montmorillonite and pure kaolinite.

Anahtar Kelimeler

Electrokinetic decontamination, mixed mineral clay, zero point of charge potential, zeta potential

Kaynakça

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