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SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA

ZHANG Lei SONG Feng-bin

ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. 中国地理科学, 2005, 15(4): 343-347.
引用本文: ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. 中国地理科学, 2005, 15(4): 343-347.
ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. Chinese Geographical Science, 2005, 15(4): 343-347.
Citation: ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. Chinese Geographical Science, 2005, 15(4): 343-347.

SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA

基金项目: Under the auspices of the Key Project of Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX 1-SW- 19)
详细信息
    作者简介:

    ZHANG Lei (1978- ), male, a native of Laiwu of Shandong Province, Ph.D. candidate, specialized in soil contamination and prevention. E-mail: zhanglei@neigae.ac.cn

  • 中图分类号: X131.3

SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA

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出版历程
  • 收稿日期:  2005-05-20
  • 刊出日期:  2005-12-20

SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA

    基金项目:  Under the auspices of the Key Project of Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX 1-SW- 19)
    作者简介:

    ZHANG Lei (1978- ), male, a native of Laiwu of Shandong Province, Ph.D. candidate, specialized in soil contamination and prevention. E-mail: zhanglei@neigae.ac.cn

  • 中图分类号: X131.3

摘要: Four soils, phaeozem (PM), saline-alkali soil (SA), meadow albic bleached soil (MA) and dark brown forest soil (DB) from Northeast China were used to examine the sorption and desorption characteristics of Cd and pH influence on it. According to sorption experiment without pH control, the order of amount of absorbed Cd by soils was:SA>PM>DB>MA. The results from non-linear fitting method showed that Langmuir and Freundrich models were more adaptable than Temkin model in describing the sorption data. The maximum sorption amounts from Langmuir model were: PM>SA>MA>DB. Exponential equation for PM and SA and quadratic equation for MA and DB were suitable to fit the desorption data. The order of average desorption percentage was: MA>DB>PM>SA. The amounts of sorption by PM, DB and MA reached the maximum in pH 9.0, while sorption by SA was linearly increased in the experimental range of pH 3.3-11.4. In uniform pH, however, Cd sorption by SA was the minimum among four soils, which indicated that the more amounts of Cd absorbed by SA in isotherm sorption were ascribed to the higher soil pH. The higher sorption of Cd in PM resulted from the higher percentage of organic matter and clay components.

English Abstract

ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. 中国地理科学, 2005, 15(4): 343-347.
引用本文: ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. 中国地理科学, 2005, 15(4): 343-347.
ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. Chinese Geographical Science, 2005, 15(4): 343-347.
Citation: ZHANG Lei, SONG Feng-bin. SORPTION AND DESORPTION CHARACTERISTICS OF CADMIUM BY FOUR DIFFERENT SOILS IN NORTHEAST CHINA[J]. Chinese Geographical Science, 2005, 15(4): 343-347.

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