AboutDavid L. Russell, PE Expertise I`m a Chemical,Civil and Environmental Engineer and have a number of projects in all phases of the environment.
I have worked in the chemical industry and am active in professional societies, and am currently on an industrial wastes committee for the Water Environment Federation, and have taught courses in remediation in the US and abroad.
I have written one book on Remediation of petroleum Contaminated Sites, and have a second book on PRACTICAL WASTEWATER TREATMENT to be published by John Wiley in September, 2006. I've also written over 30 articles on various elements of environmental problems and cleanup. Most Recently, I have addressed a NATO Scientific and Techical Conference on Ecoterrorism, and have worked with the same group on remediation of sites contaminated with Chemical Warfare Agent materials and othe materials as well. . I can answer q`s about Chemical and Environmental Engineering, land development, air pollution, water pollution, soil and water cleanup, combustion, international environmental problems, industrial processes chemical processes. Civil and Environmental and Chemical Engineering. Overall, I have over 35 years of experience in this area. Note: I do not answer homework questions
Experience I love work in the third world and developing areas
because it is challenging and one can get a sense of accomplishment.
Question I might have sent this already, but I messed up. I'm a sixth grader and I'm doing a science project. It's required that we interview an expert. If you can, could you please answer my questions, if not, could you please let me know. Thank you
1. Are there any salts in rain, if so, what are they.
2. Why is the average salinity of seawater between 32 ppt and 38 ppt?
3. When measuring salinity, what are you really measuring?
4. When it rains, does the rain effect the water?
Answer 1, No rainwater does not have salts because it is formed by evaporation and condensation and the evaporation process leaves the salts behind.
2. I have no idea.
3. Salinity. It is a measure of the amount of salt. Depending upon the method, you might be measuring either sodium, or chloride or both, but seawater contains many other elements as well, and a straight test of sewater by evaporative measures will measure all the salts.
4. Think about that one for a moment. It depends upon the size of the container. If you have a small container which has salt water, and you add rainwater to it what will happen to the salt concentration.
Now, think about a very very large container. The same thing will happen but you might not be able to notice it because it is so large and the rainwater amount is so small. There is also the question of where did the moisture start from in the first place. Did the evaporated water which caused the clouds and the rain start from the sea? Probably so, given the relative volume of seawater on the planet as compared to fresh water. So where does that leave you? Back where you started. It's a cycle and the cycle is in rough equilibrium.
