Please look at the following below links which may help you in your analysis:

http://www.softschools.com/formulas/chemistry/lead_ii_sulfide_formula/429/

https://www.sciencedirect.com/science/article/pii/0021979789901963

http://college.cengage.com/chemistry/general/ebbing/general_chem/8e/students/protected/solutions/ch18.pdf

Thanks

Thank Isam Eldin Hussein Elgailani so much

How PbS can come to soil or water from their sources?

I suggest that you check also: https://www.researchgate.net/post/Can_anyone_please_recommend_a_process_to_etch_PbS_film

PbS is soluble in aqua regia mixture.

Like in mining sector, the PbS (Galena) is dissolved in HCl and Nitric acid at a ratio of 3:1.

@How PbS can come to soil or water from their sources? Hameed Ullah.

All heavy metal compounds present in soil and water are soluble and mobile at a lower pH.

thank you Christopher Unyime Ebong