ÇİNKO-NİKEL ALAŞIM KAPLAMA ATIKSULARININ KİMYASAL ARITABİLİRLİĞİNİN ARAŞTIRILMASI

Çeliğin galvanizlenmesi, çelik yüzeyini korozyondan korumak için uzun yıllardır uygulanan önemli bir endüstriyel işlemdir. Çinko-nikel alaşım kaplama, diğer çinko alaşım kaplama teknolojilerine kıyasla daha iyi mekanik özelliklere, daha yüksek korozyon direncine sahip olduğundan birçok endüstride yaygın olarak tercih edilmektedir. Ağır metal kaplama endüstrisi proseslerinde kullanılan çeşitli kimyasallar ve hammaddeler sonucunda bu endüstriden kaynaklanan atıksular ciddi bir çevre sorunu yaratmaktadır. Bu sebeple ağır metal kaplama endüstrisinden kaynaklanan atıksularda çevre üzerinde toksik etkiye sahip olduğu bilinen kirleticiler deşarj limitleriyle sınırlandırılmıştır. Atıksularda ağır metallerin kontrolüne yönelik artan talep, daha etkili ve daha ekonomik arıtma yöntemlerinin araştırılmasına yol açmıştır. Bu çalışmada, Bursa Nilüfer Organize Sanayi Bölgesi içerisinde faaliyet gösteren tesise ait, çinko-nikel kaplama atıksularının Diplexin Zn-07 koagülantı ile arıtılabilirliği incelenmiştir. Yapılan çalışmalar sonucunda atıksuyun pH’ı %48’lik NaOH ile 8,51 değerine getirildiğinde, 0,14 mL Diplexin Zn-07 koagülantının dozlanmasıyla %98,65 çinko giderme verimi, %99,33 nikel giderme verimi elde edilmiştir. 1 m3 atıksuyun arıtılması için kullanılan kimyasalların maliyeti 1,83 Euro olarak hesaplanmıştır.

Anahtar Kelimeler:

Çinko-Nikel Alaşım Kaplama Atıksuları, Atıksu Arıtma, Metal Kaplama Endüstrisi Atıksuları, Kompleks Olarak Bağlı Ağır Metal İçeren Atıksuların Arıtılması, Diplexin Zn-07, Maliyet

Investigation of Chemical Treatability of Zinc-Nickel Alloy Plating Wastewater

Galvanizing of steel is an important industrial process that has been used for many years to protect the steel surface from corrosion. Zinc-nickel alloy plating is widely preferred in many industries because it has better mechanical properties and higher corrosion resistance compared to other zinc alloy plating technologies. Various chemicals and raw materials used in heavy metal coating industry processes and wastewater from this industry create a serious environmental problem. For this reason, pollutants known to have toxic effects on the environment are limited to the discharge limits for wastewater originating from the heavy metal coating industry. Control of heavy metals in wastewater has become important and has led to the research for more efficient and economical treatment methods. In this study, the treatability of zinc-nickel coated wastewater of the facility operating in Bursa Nilüfer Organized Industrial Zone with Diplexin Zn-07 coagulant was investigated. As a result of the studies, the pH of the wastewater was brought to a value of 8.51 with %48 NaOH. 0.14 mL of Diplexin Zn-07 coagulant was dosed. Thus, 98.65% zinc removal efficiency and 99.33% nickel removal efficiency were obtained. The cost of chemicals used to treat 1 m3 of wastewater is calculated as 1.83 Euros.

Keywords:

Zinc-Nickel Alloy Plating Wastewater, Wastewater Treatment, Metal Plating Industry Wastewater, Treatment of Complexly Bound Heavy Metal Containing Wastewater, Diplexin Zn-07, Cost,

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