Adsorption Kinetics of Pb2+ Removal from Aqueous Solutions Using Spent Batteries

Yıl 2014, Cilt: 4 Sayı: 1, 49 - 54, 31.03.2014

İsaiah Adesola Oke

Öz

Lead poison and lead in drinking water sources are common reports nowadays. This paper presents a report on removal of lead ion from aqueous solution using a household waste (used batteries). Spent batteries were collected, sectioned; carbon rods were removed and ground into powder. Powdered Carbon Rods (PCR) were sieved into different particle sizes. Adsorption properties of the adsorbent were studied using synthetic lead solutions and typical wastewaters with a particular attention to kinetics models and cost analysis. The study revealed that kinetic models can be grouped into two based on the values of correlation coef cient (R2) as adsorption kinetics models with R2 less than 0.96 and adsorption kinetics models with R2 greater than 0.96. The adsorption kinetic of Pb2+ onto PCR at different pH were 0.250 (l h-1), 0.375 (mg g-1) with R2 = 0.855 and 0.095(l h-1), 0.169(mg g-1) with R2= 0.992 at initial pH of 7.2 and 3.2 respectively for Pseudo rst-order. Applicability of the process to typical wastewaters and raw water samples showed that PCR can be used as an adsorbent for Pb2+ removal from aqueous solutions. The study concluded that the mechanism of adsorption of Pb2+ onto PCR as an adsorbent followed two-steps intra-particle and pore diffusion transport. The average costs of producing a kilogram of powdered carbon rods were found to be 0.875USD and 1.018 USD for public and generator electricity sources respectively. The cost producing PCR is dearer compared to the cost of producing empty fruit bunches (0.50USD kg-1), 0.068 USD kg-1 of powdered corn cob, cheaper compared to the cost of producing pencon shell based activated carbon (2.72 USD kg-1) and sugar cane based granular activated carbon by steam (3.12 USD kg-1).

Anahtar Kelimeler

Used batteries, PCR, adsorption properties, lead removal, adsorption kinetics

Atık Pilleri Kullanarak Sıvı Çözeltilerden Kaldırılan Pb2+’nin Adsorbsiyon Kinetiği

Öz

İçme su kaynaklarındaki kurşun ve kurşun zehri günümüzde yaygın olarak ifade edilmektedir. Bu
çalışma evsel bir atık (kullanılmış pil) kullanarak, sıvı çözeltiden kurşun iyonlarının kaldırılması üzerine bir bilgi
sunmaktadır. Kullanılmış piller toplanılıp kesitlerine ayrıldıktan sonra, karbon çubukları çıkarıldı ve öğütüldü.
Adsorbentlerin adsorpsiyon özellikleri kinetic modeller ve maliyet anazlileri dikkate alınarak, tipik kirleticiler
ve sentetik kurşun çözücüler kullanılarak çalışıldı. Korelasyon katsayısı değerlerine göre mevcut çalışma kinetic
modellerin iki şekilde gruplandırılabileceğini ortaya koydu. Farklı pH değerlerinde (7.2 and 3.2) PCR üzerine
Pb2’nin adsorpsiyon kinetiği, sırasıyla R2 = 0.855 de 0.250 (l/h), 0.375 (mg/g) ve R2 = 0.992 de 0.095(l/h),
0.169(mg/g) idi. Tipik kirleticiler ve ham su örnekleri, PCR’nin sulu çözeltilerden Pb2+’nin kaldırılması için bir
adsorbent olarak kullanılabileceğini gösterdi. Maliyet analizleri ortlama 1 kg karbon çubukları üretmenin ortak
ve ortak olmayan elektrik kaynakları için sırasıyla 0.875USD ve 1018 USD mal olacağını gösterdi. Çalışma, bir
adsorbent olarak PCR üzerine Pb2+ adsorbsiyon mekanizmasının iki adımda gerçekleştiği ortaya çıktı.

Anahtar Kelimeler

Atık piller, PCR, adsorbsiyon özellikleri, kurşun kaldırmı, adsorbsiyon kinetikleri

Kaynakça

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