During recent earthquakes in Nepal and several states of India it is observed that drinking water in many wells got contaminated (with salts, minerals, mud, drainage waste etc.). After a month also, water quality in several wells is not normalized. People need help. I request our scientific community for help to find out an economic solution. Based on the past experience and studies, civil engineers may provide feedback on good techniques. Please help. I think it is feasible to develop a filter cartridge in the shape of dognut of larger diameter (which can be placed in the well). Details have to be worked out.
Prior to drink water may be decontaminated by using copper made vessels that provide cheaper maintenance cost however initially its costly.
AS A STOP GAP MEASURE I WOULD PROPOSE DOSAGE OF ALUM (ALUMINIUM SULPHATE ) AND SODA ASH AS A COAGURANT AND STABILIZER TO PRECIPITATE FLOCS (FINE SUSPENDED MATERIAL FOLLOWED BY FILTRATION USING GRADED SAND MEDIUM IN A WATER TANK POT OR DRUM. THE PROCESS WILL BE FOLLOWED BY DISINFECTION USING CHEMICAL DISINFECTANT SUCH AS CALCIUM HYPOCHLORITE OR CHLORIDE OF LIME. THIS WILL ACHIEVED EFFECTIVELY BY ENGAGING THE SERVICES OF AN EXPERT ON GROUND ON ACTUAL DOSAGES.
REGARDS
MATOKE
No doubt after earth quake the ground water may be contaminated. Because before earth quake, fluctuation in water level take place in dug wells/bore wells. This is already reflected in pore pressure study at Koyana India. Some study have been carried out, about the water quality before and after earth quake. The concept of water rock interaction, take place in this concept. It is very difficult to know , what parameters have been increased or decreased in dug wells or bore well waters , until unless know the chemical quality of water of that particular well/ bore well. Thus the analysis of ground water samples are must and after that only the picture of contamination will be clear. It is noted, treatment for drinking water in post earth quake areas are based on the type of contamination occurred from which the technology will be inferred. Which come to know by intensive study of water chemistry.
It is expected that after earth quake water quality is affected due to presence of high suspended particulate matter and other contaminants. As an emergency measure water form ground water may be filtered through sand bed and activated charcoal of different particle size and chlorinated using hydrochloride with control dozing so the the residual chlorine does not exceed 15ppm. This will be helpful to control water borne diseases.
Some correction. Chlorinated with hypochloride delete hydrochloride. Sorry for mistake.
- Badges
- Science topic
- Similar topics
- Biological Science
- Biochemistry
- Biochemical Techniques
- Analytical Chemistry
- pH