Recent research on deep sea water (DSW) in the Xisha region of the South China Sea has unveiled promising insights that could reshape the water, sanitation, and drainage sectors. Conducted by the Guangzhou Marine Geological Survey (GMGS) and led by Xiaochen Fang from the Sanya Institute of South China Sea Geology, this investigation highlights the unique physical and chemical properties of deep sea water, which is increasingly recognized as a valuable resource for various industries.
The study, conducted in July 2022, examined vital parameters such as temperature, salinity, pH, and concentrations of dissolved oxygen and inorganic salts. Fang noted, “The quality of surface seawater in Xisha is excellent, meeting first-class seawater survey standards. This indicates a healthy marine environment, which is crucial for sustainable resource management.” However, the research also revealed that while surface layers had low concentrations of nutrient salts, these levels increased with depth, suggesting a rich reservoir of nutrients in deeper waters.
The implications of these findings extend beyond ecological health. With DSW containing high purity, nutrients, and trace elements, it has been identified as a potential game-changer for multiple sectors, including agriculture, aquaculture, and even cosmetics. Countries like Japan and South Korea have already tapped into DSW for its beneficial properties, and Fang’s research suggests that China could follow suit, particularly given the South China Sea’s vast reserves.
Fang emphasized the importance of local DSW resources, stating, “Chinese manufacturers currently rely heavily on imported deep sea water, which limits the development of our domestic industry. The SCS has the potential to provide high-quality DSW resources that could support various applications.” This local sourcing not only promises to enhance product quality but also fosters economic growth and reduces dependency on foreign resources.
As the study elucidates the horizontal and vertical changes in the physical and chemical properties of deep seawater, it lays the groundwork for future exploration and utilization strategies. The investigation provides crucial baseline data that can support desalination efforts and the comprehensive exploitation of seawater, potentially leading to innovations in water treatment and management.
The findings of this research, published in the journal ‘Water’ (translated from Chinese), serve as a clarion call for the water, sanitation, and drainage sectors to explore the untapped potential of deep sea water. As industries look for sustainable and renewable resources, the insights from this study could catalyze a shift towards more innovative and environmentally friendly practices.
For more information on this research and its implications, you can explore the Sanya Institute of South China Sea Geology.
