Dear Dr. Karbassi,

One method for removal of hydrogen sulfide from water is to install a chlorine feeder and a sand filter. The hydrogen sulfide is oxidized by the chlorine and any insoluble sulphide particles that form are removed by a sand or crushed anthracite filter. Approximately 2 mg/L chlorine must be added to remove 1 mg/L hydrogen sulfide. If the treated water is supplied for drinking, it may be necessary to install a small cartridge filter containing activated carbon on the drinking water tap to eliminate the chlorine taste. A full sized carbon filter is often used to remove the chlorine from the distribution system. This is an excellent alternative for situations where the water contains some iron along with the hydrogen sulfide.

Dear colleague,

You can use hydraulic barrier to prevent such groundwater flow. This can be achieved through using surface water in the reservoir itself. 

Dear Prof. Kundu

Thank you very much for the information. The idea sounds good. Once we get into practical work, I will contact you for any possible consultancy. Most probably, chlorine changes the Eh of water and this change results in removal of H2S. 

Truly yours

karbassi

 Dear Prof. Ghodeif

Thank you for the suggestion. May I request you for more practical information on hydraulic barrier?

Truly yours

karbassi

Followed the replies.  I think they are appropriate and earnestly hope solves your problem.

Dear Navin

The sulfur content is about 5 mg/L. The ground water has found its way into the dam reservoir and has caused some corrosion on the facilities. We have to control the H2S in upper reaches before it enters into the dam. We are analyzing water for further determinations.

Truly yours

karbassi

Dear Naveen

Thank you for your suggestions.

Truly yours

karbassi