Fractal dimension of humic acids in differents experimental condition

Química Nova

Reis, César¹  Mendonça, Eduardo Sá¹  Universidade Federal de Viçosa, Viçosa¹  Silva, Alessandro Costa da¹ 

关键词: humic acids;    fractals;    turbidimetry.;   

DOI  :  10.1590/S0100-40422003000300011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The determination of fractal dimension (D) of humic particles was achieved by the turbidimetric technique where diluted suspensions of humic acids, in different experimental conditions, were analyzed by spectrophotometry UV-Vis. The slope of the lines (b) was taken from the graphics (log t vs logl) to obtain D. The results show that the values of D changed according to pH (3.0, 5.0 and 7.0), temperature (25 and 5 oC) and shaking (magnetic and horizontal). In general, the value of D decreased with the increment of pH, increase of shaking and decrease of temperature.

【 授权许可】

Unknown