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Abstract

Marine oil spills are effectively controlled by chemical dispersants. However, the toxicity associated with it reduce its employment in marine environment. To overcome this limitation, the acute toxicity of choline based ionic liquids was evaluated as a potential low toxic variant for oil spill remediation. Further, the aggregation behavior of the individual as well as their binary mixtures was also evaluated by employing tensiometry technique. The half-lethal concentration, LC50on zebrafish (Danio rerio) of three choline based ionic liquids showed that the studied ionic liquids (ILs) fall in the range of “practically nontoxic” ( 100-1000 mg L-1).Various micellar properties showed that a synergistic interaction existed between all the binary mixtures (β < 0, f1and f2 <1). Moreover, the produced micelles were found to be spontaneous and thermodynamically stable with respect to all the mole ratio of ILs. Overall, these results showed the safe nature of the studied ILs for various application including oil dispersants.

Bahasa Abstract

Uji Toksisitas Akut dari Ionic Liquids (IL) Berbasis Kolin terhadap Ikan Danio rerio dan Perilaku Agresi dari Campuran Binernya. Tumpahan minyak bumi di laut diatasi secara efektif dengan dispersan yang berasal dari bahan kimia. Namun, karena toksisitas yang ditimbulkan oleh dispersan tersebut, penggunaan dispersan tersebut dikurangi dalam lingkungan laut. Untuk mengatasi keterbatasan ini, uji toksisitas akut dari ionic liquid (IL) berbasis kolin dievaluasi sebagai potensial toksik varian rendah untuk remediasi tumpahan minyak bumi. Selanjutnya, perilaku agregasi individu serta cempuran binernya juga dievaluasi menggunakan teknik tensiometri. LC50 dari zebrafish (Danio rerio) untuk tiga IL berbasis kolin menunjukkan bahwa cairan yang diteliti berada dalam kisaran “tidak beracun” (100–1000 mgL-1). Sifat-sifat micellar menunjukkan bahwa interaksi sinergis terdapat pada semua campuran biner (β < 0, f1and f2 <1). Selain itu, micelle yang diproduksi dengan semua rasio mol dari IL bersifat spontan dan stabil secara termodinamika. Secara keseluruhan, hasil ini menunjukkan bahwa IL yang diteliti bersifat aman untuk alam dan dapat digunakan dalam berbagai aplikasi termasuk dispersan untuk minyak bumi.

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