Irreversible adsorption/desorption of Naphthalene to lula sediments
Conference
·
OSTI ID:370234
- Rice Univ., Houston, TX (United States)
This paper is to investigate the adsorption/desorption irreversibility of a neutral organic hydrocarbon to a well-characterized sediment. In multiple batch adsorption/desorption experiments, the maximum concentration of naphthalene that resist desorption has been measured to be around 10{plus_minus}2 {mu}g/g for the sediments investigated in this study. The maximum concentration observed in this study is not in contradiction to the concentration that resist desorption in many literature reported field observations. When this maximum concentration is satisfied, the adsorption/desorption of naphthalene appears to be linear and reversible. The fraction of the adsorbed mass that becomes irreversibly sorbed varied with the initial naphthalene mass that is available for adsorption. Irreversible adsorption/desorption is not readily observable in high solid/solution ratio batch experiments as well as in soil column flow through experiments. The observed data is very unique that none of the existing theoretical model can be used to explain the data. Therefore, a new mechanism that causes irreversible adsorption/desorption is proposed and will be discussed.
- OSTI ID:
- 370234
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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