Asset Details
Do you wish to reserve the book?
CHARACTERIZATION OF FRESHWATER AND ESTUARINE HUMIC ACIDS BY MOLECULAR WEIGHT DISTRIBUTION
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
CHARACTERIZATION OF FRESHWATER AND ESTUARINE HUMIC ACIDS BY MOLECULAR WEIGHT DISTRIBUTION
Do you wish to request the book?
CHARACTERIZATION OF FRESHWATER AND ESTUARINE HUMIC ACIDS BY MOLECULAR WEIGHT DISTRIBUTION
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Dissertation
CHARACTERIZATION OF FRESHWATER AND ESTUARINE HUMIC ACIDS BY MOLECULAR WEIGHT DISTRIBUTION
1971
Overview
In this work gel chromatography has been applied to the study of humic acids dissolved in natural waters using samples at natural concentration. Through the use of specially devised ultracentrifuge techniques for the analysis of polydisperse mixtures, it has been possible to verify the absence of significant absorption effects during gel chromatography.The molecular weights of humic acids in all Florida gulf coast river waters examined showed a continuous distribution over the range of resolution of the gel, approximately 5000 to 300. The amount of humic acids with molecular weights greater than 5000 was from 5 to 13 percent on an organic carbon basis. The majority of the remaining material had molecular weights between 5000 and 1000. In 5 out of 7 cases in which humic acid rich fresh water mixed with sea water in estuaries, there was evidence for the loss from solution of a substantial fraction of the humic acids with molecular weights greater than approximately 5000. This loss was also observed in 2 out of 3 laboratory experiments in which humic acid containing fresh water was mixed with seawater. The formation of a flocculent brown precipitate in the laboratory experiments indicates that the high molecular weight humic acids were lost by precipitation.The majority of the humic acids in fresh water were found to be stable in mixtures with seawater, and are expected to exert an important influence on estuarine and nearshore seawater chemistry.
Publisher
ProQuest Dissertations & Theses
Subject
ISBN
1082906085, 9781082906084
