Yıl 2019, Cilt , Sayı 17, Sayfalar 776 - 785 2019-12-31

İçme Suyu Kaynaklarındaki Trihalometan Oluşumunun İncelenmesi

Nizamettin ÖZDOĞAN [1] , Kadir ÖZDEMİR [2]


İçme suyu kaynakları doğal organik maddeler (DOM) içermektedir. Suda bulunan bu organik maddelerin dezenfeksiyon sürecinde klorla reaksiyona girmesi sonucu Trihalometan (THM) olarak adlandırılan klorlu yan ürünler oluşmaktadır. THM’lar kanserojen etkiye sahip bileşikler olmasından dolayı insan ve çevre sağlığı açısından son derece sakıncalıdır. Bu çalışmada, doğal organik madde içeren içme suyu kaynaklarının klorlanması sonucu meydana gelen toplam trihalometan oluşum potansiyeli (THMOP) ve trihalometan (THM) bileşiklerinin dağılımına etki eden başlıca faktörler incelenmiştir. Çalışma alanı ve içme suyu kaynağı olarak Terkos Gölü (İstanbul), Büyükçekmece Gölü (İstanbul), Ulutan Barajı (Zonguldak) seçilmiştir. Alınan ham su örneklerinde, doğal organik madde miktarı, Toplam Organik Karbon (TOK), 254 nm’de UV absorban (UV254) ve spesifik UV absorban (SUVA) parametrelerinin analizleri laboratuvar ortamında gerçekleştirilmiştir. En yüksek SUVA değerine sahip Terkos gölü ham sularında bulunan DOM’lerin organik karbonu, hidrofobik özellik gösteren fraksiyonlu bileşiklerden meydana gelirken, daha düşük değere sahip Büyükçekmece gölü ve Ulutan Barajı ham sularında bulunan DOM’in ise daha çok hidrofilik özellik gösteren organiklerden meydana geldiği tespit edilmiştir. Diğer yandan söz konusu içme suyu kaynaklarından alınan ham su örnekleri belirli Cl2/TOK oranlarına göre klorlanarak 2-168 saatlik reaksiyon süresine maruz bırakılmış ve sonunda meydana gelen THM miktarlarının analizleri EPA-551.1 metodunda yer alan sıvı-sıvı ekstraksiyon yöntemine göre gerçekleştirilmiştir. En yüksek THM konsantrasyonları (en yüksek SUVA değerine sahip organik karbonu hidrofobik yapıda olan) Terkos ham sularının klorlanması sonucu elde edilmiştir. Bu çalışmada ayrıca farklı pH, klor dozu ve reaksiyon süresinin klorlama sırasında meydana getirdiği THM ve THM türlerinin dağılımı üzerindeki etkileride gösterilmiştir. Özellikle alkali pH’larda daha yüksek THM oluşumları tespit edilmiş olup, aynı şekilde daha yüksek klor dozlarında ve bekletme sürelerinde daha yüksek THM oluşumlarının gözlenmesi bu çalışmanın elde edilen önemli sonuçlarından biri olmuştur.

Trihalometanlar, Klorlama, İçme suyu kaynakları
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Birincil Dil tr
Konular Mühendislik
Bölüm Makaleler
Yazarlar

Orcid: 0000-0001-5520-5124
Yazar: Nizamettin ÖZDOĞAN (Sorumlu Yazar)
Kurum: Zonguldak Bülent Ecevit Üniversitesi, Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
Ülke: Turkey


Orcid: 0000-0003-1464-7078
Yazar: Kadir ÖZDEMİR
Kurum: Zonguldak Bülent Ecevit Üniversitesi, Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
Ülke: Turkey


Tarihler

Yayımlanma Tarihi : 31 Aralık 2019

APA Özdoğan, N , Özdemi̇r, K . (2019). İçme Suyu Kaynaklarındaki Trihalometan Oluşumunun İncelenmesi . Avrupa Bilim ve Teknoloji Dergisi , (17) , 776-785 . DOI: 10.31590/ejosat.635926