Optimization of Silver Nanoparticle Separation Method from Drilling Waste Matrices

Monika Gajec, Ewa Kukulska-Zając and Anna Król
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Monika Gajec: Oil and Gas Institute–National Research Institute, ul. Lubicz 25a, 31-503 Kraków, Poland
Ewa Kukulska-Zając: Oil and Gas Institute–National Research Institute, ul. Lubicz 25a, 31-503 Kraków, Poland
Anna Król: Oil and Gas Institute–National Research Institute, ul. Lubicz 25a, 31-503 Kraków, Poland

Energies, 2021, vol. 14, issue 7, 1-17

Abstract: Significant amounts of produced water, spent drilling fluid, and drill cuttings, which differ in composition and characteristics in each drilling operation, are generated in the oil and gas industry. Moreover, the oil and gas industry faces many technological development challenges to guarantee a safe and clean environment and to meet strict environmental standards in the field of processing and disposal of drilling waste. Due to increasing application of nanomaterials in the oil and gas industry, drilling wastes may also contain nanometer-scale materials. It is therefore necessary to characterize drilling waste in terms of nanomaterial content and to optimize effective methods for their determination, including a key separation step. The purpose of this study is to select the appropriate method of separation and pre-concentration of silver nanoparticles (AgNPs) from drilling wastewater samples and to determine their size distribution along with the state of aggregation using single-particle inductively coupled plasma mass spectrometry (spICP-MS). Two AgNP separation methods were compared: centrifugation and cloud point extraction. The first known use of spICP-MS for drilling waste matrices following mentioned separation methods is presented.

Keywords: silver nanoparticles; single-particle inductively coupled plasma mass spectrometry; drilling waste; separation; cloud point extraction; centrifugation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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