Sulu Çözeltide Arseniğin Nanokompozit Tabanlı Elektrokimyasal Algılanmasının Geliştirilmesi

Year 2023, Volume: 18 Issue: 2, 503 - 510, 01.09.2023

Ömer Sadak

https://doi.org/10.55525/tjst.1341662

Abstract

İçme sularının ağır metallerle kirlenmesi, küresel çevre ve halk sağlığı için ciddi tehdit oluşturmaktadır. Şu anda yaklaşık 20 ülkede içme suyunda bulunan ve EPA yönergelerinden daha yüksek arsenik seviyeleri rapor edilmiştir. Arsenik oldukça zehirlidir, geniş çapta dağılmıştır ve yer kabuğunda bulunur. Suda hem organik hem de inorganik formda bulunur. Arseniğin çevreye salınım kaynakları, endüstriyel atıklar, pestisitler, odun koruyucu maddeler, fosil yakıtların yanması ve madencilik faaliyetleri yoluyla farklı şekillerde ortaya çıkmaktadır. Şu anda Arsenik, endüktif olarak eşleşmiş plazma kütle spektrometrisi (ICPMS), grafit fırınlı atomik absorpsiyon spektrometrisi (GFAAS) ve ICPMS'li yüksek performanslı sıvı kromatografisi (HPLC) dahil olmak üzere çok çeşitli yöntemler kullanılarak belirlenmektedir. Bununla birlikte, bu yöntemler yavaş, pahalıdır ve çalışması için yetenekli insanlar gerektirir. Alternatif olarak, elektrokimyasal sensörler, çok düşük konsantrasyonlarda ağır metallerin tespiti için potansiyel olarak güçlü bir analitik teknik olarak kabul edilmiştir. Ayrıca ağır metallerin yerinde ve sürekli olarak izlenmesine olanak tanır. Bu çalışmada, ciddi çevre ve sağlık sorunlarına neden olan Arsenik'in tespiti için altın nanopartikül ve iletken polimerlerden (polidiallildimetilamonyum klorür (PDDA) ve polistiren sülfonat (PSS)) işlevselleştirilmiş grafenden yapılmış bir nanokompozit kullanılmıştır.

Keywords

Elektrokimyasal Sensörler, Arsenik, Ağır metaller

Development of a Nanocomposite-Based Electrochemical Sensing of Arsenic in Aqueous Solution

Abstract

Contamination of drinking water with heavy metals is a serious threat to the global environment and public health. Currently, approximately 20 countries have been reported for arsenic levels present in drinking water that are higher than the EPA guidelines. Arsenic is highly toxic, widely dispersed and found in the earth’s crust. It can be found in inorganic as well as organic compounds in water. Arsenic is released into the environment in a variety of ways, including industrial effluents, pesticides, wood preservative chemicals, combustion of petroleum and coal, and mining operations. Currently, Arsenic is determined using a wide variety of methods that include inductively coupled plasma mass spectrometry (ICPMS), high-performance liquid chromatography (HPLC) with ICPMS and graphite furnace atomic absorption spectrometry (GFAAS). Nevertheless, these methods are slow, expensive and require skilled people to operate. Alternatively, electrochemical sensors have been potentially recognized as a powerful analytical method for the detection of heavy metals at very low concentrations. It also allows on-site and continuous monitoring of heavy metals. A nanocomposite consisting of gold nanoparticles and conducting polymers (polydiallyldimethylammonium chloride (PDDA) and polystyrene sulfonate (PSS)) functionalized graphene was used in this study to detect arsenic, which causes major environmental and health concerns.

Keywords

electrochemical sensors, arsenic, heavy metals

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