TY - JOUR
T1 - Integrated LIBS-Raman spectroscopy
T2 - A comprehensive approach to monitor microplastics and heavy metal contamination in water resources
AU - Vaisakh, P. S.
AU - Adarsh, U. K.
AU - Amrutha, K.
AU - Warrier, Anish Kumar
AU - Kartha, V. B.
AU - Unnikrishnan, V. K.
N1 - Funding Information:
The authors are thankful for the financial support from the Device Development Program, Department of Science & Technology ( DST ), Government of India, through the research project “Development of a miniaturized and portable Laser-Induced Breakdown Spectroscopy (LIBS) setup for fast identification and sorting of different plastic classes” (DST/TDT/DDP-26/2018) and Department of Atomic Energy ( DAE ), Board of Research in Nuclear Sciences ( BRNS ), Government of India (34/14/04/2014- BRNS ). Also, acknowledge the DST-Fund's support for improving the S&T infrastructure (FIST) program (SR/FST/PSI-174/2012). U. K. Adarsh is thankful to the Manipal Academy of Higher Education (MAHE) for the research fellowship provided.
Funding Information:
The authors are thankful for the financial support from the Device Development Program, Department of Science & Technology (DST), Government of India, through the research project “Development of a miniaturized and portable Laser-Induced Breakdown Spectroscopy (LIBS) setup for fast identification and sorting of different plastic classes” (DST/TDT/DDP-26/2018) and Department of Atomic Energy (DAE), Board of Research in Nuclear Sciences (BRNS), Government of India (34/14/04/2014-BRNS). Also, acknowledge the DST-Fund's support for improving the S&T infrastructure (FIST) program (SR/FST/PSI-174/2012). U. K. Adarsh is thankful to the Manipal Academy of Higher Education (MAHE) for the research fellowship provided.
Publisher Copyright:
© 2023 Elsevier Inc.
PY - 2023/8/15
Y1 - 2023/8/15
N2 - The increased use of plastic products and global industrial conditions have contaminated natural resources, especially water, with pollutants such as microplastics and trace elements, including heavy metals. Hence, continuous monitoring of water samples is an urgent requirement. However, the existing microplastic-heavy metal monitoring methodologies require discrete and sophisticated sampling approaches. The article proposes a multi-modal LIBS-Raman spectroscopy system for detecting microplastics and heavy metals from water resources with unified sampling and pre-processing approaches. The accomplishment of the detection process is using a single instrument by exploiting the trace element affinity of microplastics, which operates in an integrated methodology to monitor water samples for microplastic-heavy metal contamination. The polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET) plastic types dominate the identified microplastics from different sampling spots: in an estuary formed by the Swarna River near Kalmadi (Malpe) in Udupi district, and from River Netravathi in Mangalore, Dakshina Kannada District, Karnataka, India. The detected trace elements from microplastic surfaces include heavy metals such as Al, Zn, Cu, Ni, Mn, and Cr and other elements counting Na, Mg, Ca, and Li. The system could record concentrations of trace elements down to 10 ppm, and comparing results with the conventional technique of Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) confirms the ability of the system to detect trace elements from microplastic surfaces. In addition, comparing results with direct LIBS analysis of water from the sampling site shows better results in microplastic-based trace element detection.
AB - The increased use of plastic products and global industrial conditions have contaminated natural resources, especially water, with pollutants such as microplastics and trace elements, including heavy metals. Hence, continuous monitoring of water samples is an urgent requirement. However, the existing microplastic-heavy metal monitoring methodologies require discrete and sophisticated sampling approaches. The article proposes a multi-modal LIBS-Raman spectroscopy system for detecting microplastics and heavy metals from water resources with unified sampling and pre-processing approaches. The accomplishment of the detection process is using a single instrument by exploiting the trace element affinity of microplastics, which operates in an integrated methodology to monitor water samples for microplastic-heavy metal contamination. The polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET) plastic types dominate the identified microplastics from different sampling spots: in an estuary formed by the Swarna River near Kalmadi (Malpe) in Udupi district, and from River Netravathi in Mangalore, Dakshina Kannada District, Karnataka, India. The detected trace elements from microplastic surfaces include heavy metals such as Al, Zn, Cu, Ni, Mn, and Cr and other elements counting Na, Mg, Ca, and Li. The system could record concentrations of trace elements down to 10 ppm, and comparing results with the conventional technique of Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) confirms the ability of the system to detect trace elements from microplastic surfaces. In addition, comparing results with direct LIBS analysis of water from the sampling site shows better results in microplastic-based trace element detection.
UR - https://www.scopus.com/pages/publications/85160243390
UR - https://www.scopus.com/pages/publications/85160243390#tab=citedBy
U2 - 10.1016/j.envres.2023.116198
DO - 10.1016/j.envres.2023.116198
M3 - Article
C2 - 37209978
AN - SCOPUS:85160243390
SN - 0013-9351
VL - 231
JO - Environmental Research
JF - Environmental Research
M1 - 116198
ER -