Elemental evaluation confirmed that heavy metals reminiscent of titanium, nickel, copper, zinc, barium, and lead are current in a lot larger concentrations within the black crust, that are deposits from exterior air pollution sources like building actions, highway mud, and emissions from cement factories. | Photo Credit: FILE PHOTO
The research, titled ‘Characterization of Red Sandstone and Black Crust to Analyze Air Pollution Impacts on a Cultural Heritage Building: Red Fort, Delhi, India’,analysed the crimson sandstone used within the construction and samples of black crust.. Researchers concluded the black crust “might be a results of atmospheric deposition linked to air pollution.”
The researchers collected a restricted variety of samples from the Red Fort’s fortification wall and Zafar Mahal, specializing in each degraded areas with seen black crusts and non-degraded crimson sandstone. Elemental evaluation confirmed that heavy metals reminiscent of titanium, nickel, copper, zinc, barium, and lead are current in a lot larger concentrations within the black crust, that are deposits from exterior air pollution sources like building actions, highway mud, and emissions from cement factories.
Regarding conservation, the research pointed that preventive conservation measures might help decelerate the crust formation. “The formation of a black crust is a progressive phenomenon that often begins with a skinny black layer or deposit, which could be eliminated with out considerably damaging the stone’s integrity, at the very least within the early levels.” It really helpful a upkeep cleansing program for essentially the most affected areas and the applying of stone protectives to stop or at the very least decelerate the formation of the black crust
Published – September 16, 2025 01:38 am IST








