Kalsine Karadeniz midye kabukları kullanılarak kimyasal çöktürmeyle Kurşun, Nikel ve Bakır giderimi

Bu çalışmada, kalsine Karadeniz midye kabukları kullanılarak kimyasal çöktürmeyle atıksulardan ağır metallerin giderimi araştırılmıştır. Kullanılan midye kabuğu öncelikle toz haline getirilmiş daha sonra kalsinasyon ön işlemi uygulanarak kalsine midye kabuğu tozu elde edilmiş ve bu madde kurşun, nikel ve bakır ağır metallerinin giderimi çalışmalarında kullanılmıştır. Çalışmalarda ayrıca karşılaştırma amacıyla geleneksel kalsiyum hidroksit ve sodyum hidroksit kimyasallarının kimyasal çöktürme performansı da incelenmiştir. Tüm çöktürücü ajanlar için dozaj deneyleri ve başlangıç ağır metal konsantrasyonu deneyleri gerçekleştirilerek, en uygun arıtım koşulları belirlenmiştir. Deneyler neticesinde kalsine midye kabuğu tozu ile kurşun, nikel ve bakır ağır metallerinin arıtımında sırasıyla %98,79, %99,67 ve %99,37’lik yüksek arıtım verimleri elde edilmiştir. Kalsine midye kabuğu tozu ve diğer kimyasalların birbirlerine yakın dozajlarında etkili ağır metal gideriminin sağlanabildiği tespit edilmiştir. Midye kabuğu sağladığı bu yüksek verimlere karşın daha düşük nihai pH değerlerinin elde edilmesine neden olmuştur. Tüm bu hususlar bir arada değerlendirildiğinde kalsine midye kabuğu tozunun doğal bir materyal olması ve doğada bol miktarda bulunması nedeniyle diğer çöktürücü ajanlara bir alternatif olabileceği ortaya konmuştur.

Anahtar Kelimeler:

Kalsine midye kabuğu, kurşun, nikel, bakır, kimyasal çöktürme

Lead, Nickel, and Copper removal by chemical precipitation using calcined Black Sea mussel shells

In this study, removal of heavy metals from wastewaters by chemical precipitation using calcined Black Sea mussel shells was investigated. The mussel shell used was primarily powdered and then calcined mussel shell powder was obtained by applying calcination pretreatment, and this material was used in removal studies of lead, nickel, and copper heavy metals. The chemical precipitation performance of conventional calcium hydroxide and sodium hydroxide chemicals was also examined to make a comparison in the studies. The most suitable treatment conditions were determined by conducting dosage and initial heavy metal concentration experiments for all precipitating agents. As a result of experiments, high treatment efficiencies such as 98.79, 99.67 and 99.37% were achieved in treatment of lead, nickel, and copper heavy metals by calcined mussel shell powder, respectively. It has been determined that effective heavy metal removal can be achieved at close dosages of calcined mussel shell powder and other chemicals. Mussel shell caused to obtain lower final pH values despite providing these higher efficiencies. When all these factors are considered together, it has been exhibited that calcined mussel shell powder can be an alternative to other precipitating agents because it is a natural material and abundant in nature.

Keywords:

Calcined mussel shell, lead, nickel, copper, chemical precipitation,

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