pH对湿地水环境中生物膜吸附铅和镉的影响

Abstract

Abstract: Pb and Cd adsorption on the surface coatings in the pH range from 4. 5 to 7.0, which were cultivated in a reed pond in Xianghai, was carried out. The data of Pb and Cd adsorption on the surface coatings fit both Freundlich and Langmuir isoth erms very well (n=5, p=0.01), and the maximum adsorption of Pb on the su rface co atings is one order of magnitude greater than that of Cd. Meanwhile, the maxim um adsorption of Pb and Cd on the surface coatings increases with increase of pH i n the solutions, showing significant linear correlation.

Key words: pH, aquatic environments in wetland, surface coatings, lead, cadmium, adsorption

CLC Number:

X132

DONG De-ming, LI Yu, HUA Xiu-yi, ZHANG Jing-jing, YANG Fan. Effect of pH on Pb and Cd Adsorption to Surface Coatings Developed in the Aquatic Environment of Wetland[J].J4, 2002, 40(03): 303-307.

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Effect of pH on Pb and Cd Adsorption to Surface Coatings Developed in the Aquatic Environment of Wetland

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