THERMAL SCIENCE
International Scientific Journal
PHOSPHORUS ISOTHERMAL ADSORPTION CHARACTERISTICS OF MULCH OF BIORETENTION
ABSTRACT
This study aims to identify mulch of bioretention which has high phosphorus sorption capacity. The phosphorus adsorption characteristics of five types of mulch of bioretention are studied by three isothermal adsorption experiments. Results show that the Langmuir eqution is suitable for describing absorption characteristics of five types of mulch. The positive values of Gibbs free energy for phosphorus indicate that the phosphorus biosorption by five mulches is a non-spontaneous process, and the values of mean sorption free energy of mulch are less than 8 kJ/mol, which proves that the adsorption process can be dominated by physical forces. The vermiculite is the better mulch of bioretention based on high phosphorus removal capacity.
KEYWORDS
PAPER SUBMITTED: 2012-05-27
PAPER REVISED: 2012-08-28
PAPER ACCEPTED: 2012-09-01
THERMAL SCIENCE YEAR
2012, VOLUME
16, ISSUE
Issue 5, PAGES [1358 - 1361]
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