Optimization of Silver Nanoparticle Separation Method from Drilling Waste Matrices

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.

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…However, the particle size increased from 77 to 94–97 nm. Nanomaterials are being increasingly used in the oil and gas industry and two methods for extracting Ag NPs spiked into these materials, using a procedure similar to that used in the previous paper were compared by Gajec et al 272 After optimisation, which was fully described in the paper the authors concluded that for water samples centrifugation at 2800 rpm for 12 minutes, gave the best recoveries in terms of particle size and particle concentration whilst for solid wastes the CPE procedure, which is similar to that used in ref. 271 was most appropriate for extracting AgNPs spiked into solid waste material.…”

Analytical analysis of water and engine oil base nanofluid flow with the influence of viscous dissipation and variable viscosity on stretching surface

“…Nurul et al [8] investigated the Formation of Al 2 O 3 -SiO 2 /water hybrid nanofluids (HNFs) and the impact of surfactant on stability and dispersion. Some authors investigated silver nanoparticles, oil based nanofluids and boundary layer flow of a fluid particle dispersion [9][10][11][12][13][14][15][16][17][18][19][20]. Turkyilmazoglu et al [21] investigated the heat and flow produced concurrently by two movable revolving discs.…”

“…Some authors investigated silver nanoparticles, oil based nanofluids and boundary layer flow of a fluid particle dispersion [9–20]. Turkyilmazoglu et al.…”