Comparison between Total Determination and Extractable Heavy Metals from River Sediments using Conventional and Microwave Accelerated Leaching Tests

A rapid microwave-assisted acid extraction method based on the use of diluted HNO3-H2O2followed by ICP-MS analysis for simultaneous determination of trace elements in coal samples

“…In addition, Wang et al [10,21] reported elemental recoveries of 77-186% when coal samples were digested using microwave and concentrated acidic solutions (HNO 3 -H 2 O 2 and HNO 3 only) without HF, HCl and HClO 4 addition. Due to the growing interest towards the implementation of 'Green Chemistry' principles, several studies revealed the use of diluted inorganic acids for extraction of trace elements in solid matrices and recoveries of 89-117% were attained [22][23][24][25][26][27][28][29]. The current study aimed at developing a sample preparation method based on the use of diluted HNO 3 -H 2 O 2 mixture and microwave radiation for rapid extraction of trace elements in coal samples prior to ICP-MS determination.…”

Investigation of selenium and arsenic in coal-mining associated rocks and sediments using ultrasonic and sequential extractions techniques

“…fast way of desorbing inorganic 58,73,77 and organic pollutants 78 from sediments, soil and biological samples. 79,80 Ultrasound extraction is also an aseptic method and it has been suggested that high frequency ultrasound (20 kHz) in low volumes (200 mL) of bacterial suspensions resulted in a continuous reduction of bacterial cell numbers.…”