Arsenik Kirliliği Bakımından Harran Ovası Yeraltı Sularının Değerlendirilmesi

Öz

Suda özellikle yeraltı suyunda arsenik (As) kirliliği, majör sağlık sorunlarına yol açmaktadır. Arsenik konsantrasyonu içme suyunda düşük konsantrasyonda bulunsa bile ciddi sağlık etkilerine sebep olabilir ve bunun sonucunda son zamanlarda As giderim metotları önem kazanmıştır. Bu çalışmada, Ortadoğu’nun en büyük yeraltı suyu rezervlerine sahip olan Harran Ovası’nda yer alan on kuyuda Ekim ve Mart aylarında As konsantrasyonu izlenmiştir. Bu çalışmanın temel amacı, As ile kirlenmiş bir yeraltı suyunun doğru arıtım metoduyla iyileştirilmesi için uygun arıtım metodunu seçmektir. Analizlere göre, As konsantrasyonunu sınır değerini (10 ppb) aşan hiçbir kuyu yoktur. Sonuçlar göstermektedir ki, Ekim ayındaki As konsantrasyonu Mart ayındakinden daha düşüktür. Mart ayında, en yüksek As konsantrasyonu Yaygılı kuyusunda 4,12 ppb olarak tespit edilmiştir. Ozanlar kuyusu Ekim ve Mart aylarında <0,5 ppb değerleriyle en düşük As konsantrasyonuna sahiptir. Ekim ayında en yüksek As konsantrasyonu 2,39 ppb olup Çamlıdere kuyusundadır. Çamlıdere ve Yaygılı kuyuları için As giderim metotları araştırılmış ve giderim metotları (koagülasyon ve flokülasyon, adsorpsiyon, membran prosesleri, ileri oksidasyon prosesleri, elektrokoagülasyon, biyoçar) tartışılmıştır. Değerlendirmenin sonunda, en iyi As giderim metodunun avantajları düşünüldüğünde biyoçar uygulaması olabileceği öngörülmektedir.

Anahtar Kelimeler

• Arsenik,biyoçar,yeraltısuyu,Harran Ovası,giderim metotları

Assessment of Harran Plain Groundwater in Terms of Arsenic Contamination

Öz

Arsenic (As) contamination in water, especially in groundwater, has led to major health problems. Due to the recognition that As at low concentrations in potable water causes crucial health effects, As removal methods have gained significant importance in recent years. In this study, As concentration was monitored in October and March in ten observation wells located in Harran Plain, which has the largest groundwater reserves in the Middle East. The main aim of this study is to select the proper treatment method for remediation of a groundwater resource polluted with As. According to the analyses, there was no well that exceeded the limit for As concentration (10 ppb). The results revealed that As concentrations in October were lower than in March. In March, the highest As concentration was observed in Yaygılı well with the value of 4.12 ppb. Ozanlar well had the lowest As concentration with the value of <0.5 ppb. In October, the highest As concentration was 2.39 ppb in Çamlıdere well. For Çamlıdere and Yaygılı wells, As removal methods (coagulation and flocculation, adsorption, membrane processes, advanced oxidation processes, electrocoagulation, biochar) were investigated and discussed. As a result of the assessment, it was estimated that the best available As removal method could be biochar application considering its advantages.

Anahtar Kelimeler

• Arsenic,biochar,groundwater,Harran Plain,removal methods

Kaynakça

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