Kinetics of heavy metal desorption from three soils using citric acid, tartaric acid, and EDTA

被引:15
|
作者
Wasay, S. A. [1 ]
Barrington, S. [1 ]
Tokunagal, S. [2 ]
Prasher, S. [1 ]
机构
[1] McGill Univ, Dept Bioresource Engn, Ste Anne De Bellevue, PQ H9X 3V9, Canada
[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan
关键词
heavy metals (Cr; Mn; Hg; Pb; Cd; Cu; Zn); citric acid; tartaric acid; EDTA; two reaction kinetics model;
D O I
10.1139/S07-004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Organic acids are relatively new soil heavy metal leaching agents requiring the development of desorption kinetics before being applied. The objective was to determine the heavy metal desorption rates for three heavily contaminated soils (clay loam, loam, and sandy clay loam), treated under optimum conditions with either citric acid, tartaric acid, or EDTA for comparison. A two-rate reaction (fast and slow) model was defined to describe desorption kinetics, where both first order rates were assumed irreversible and reversible, respectively. Experimental data were collected by initially subjecting the three soils to batch experiments at optimum leaching agent-level, for up to 36 h. The results indicated that citric acid was a more consistent leaching agent compared to tartaric acid and EDTA, which were efficient mainly in treating the clay loam and the sandy clay loam, respectively. The two-rate reaction model fitted the data but its empirical coefficients need to be defined for each individual soil to be treated. For Pb common to all three experimental soils, k(1), representing the fast desorption rate, increased with the ratio of metal equivalence fraction: soil CEC. The coefficients k(2) and alpha(0), representing the slower rate of desorption and the proportion of Pb involved in this slow rate, respectively, increased with the mass of Pb held by the oxide and organic matter fractions. The coefficient m(1), related to the relative rate of the backward reaction from the slow to the fast, varied according to the mass of Pb held by the exchangeable site. Despite the empirical values associated with the kinetics coefficients, their correspondence with individual processes indicate that organic acid remediation can be modeled using the two rate kinetic equation proposed in this project.
引用
收藏
页码:611 / 622
页数:12
相关论文
共 50 条
  • [41] Environmental effects and desorption characteristics on heavy metal removal using carboxylated alginic acid
    Jeon, C
    Yoo, YJ
    Hoell, WH
    BIORESOURCE TECHNOLOGY, 2005, 96 (01) : 15 - 19
  • [42] Leaching of heavy metals from contaminated soils using EDTA
    Sun, B
    Zhao, FJ
    Lombi, E
    McGrath, SP
    ENVIRONMENTAL POLLUTION, 2001, 113 (02) : 111 - 120
  • [43] Kinetics of titanium leaching with citric acid in sulfuric acid from red mud
    Zhu, Xiao-bo
    Li, Wang
    Guan, Xue-mao
    TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2015, 25 (09) : 3139 - 3145
  • [44] Kinetics of metal ion exchange between citric acid and serum transferrin
    Harris, WR
    Wang, ZP
    Brook, C
    Yang, BS
    Islam, A
    INORGANIC CHEMISTRY, 2003, 42 (19) : 5880 - 5889
  • [45] Removal behaviors of Cu and Pb from heavy metal contaminated silts flushed by citric acid
    Wang, Yan
    Tang, Lin
    Liu, Likui
    GEOMECHANICS AND ENGINEERING, 2021, 26 (05) : 489 - 497
  • [46] Heavy metal removal from sewage sludge under citric acid and electroosmotic leaching processes
    Ma, Degang
    Su, Meizhong
    Qian, Jingjing
    Wang, Qian
    Meng, Fanyi
    Ge, Xiaomei
    Ye, Yu
    Song, Chunfeng
    SEPARATION AND PURIFICATION TECHNOLOGY, 2020, 242 (242)
  • [47] Influence of phosphate and citric acid on the phytoextraction of As from contaminated soils
    Kim, K.-W. (kwkim@gist.ac.kr), 1600, Inderscience Enterprises Ltd. (11):
  • [48] Effect of EDTA-T, EDTA and citric acid on smear layer removal at three different time intervals.
    Scelza, MFZ
    Scelza, P
    Preira, MS
    Paciornik, S
    JOURNAL OF DENTAL RESEARCH, 2003, 82 : 195 - 195
  • [49] Citric acid and EDTA on the growth, photosynthetic properties and heavy metal accumulation of Iris halophila Pall. cultivated in Pb mine tailings
    Han, Yulin
    Zhang, Lili
    Gu, Jiguang
    Zhao, Jiuzhou
    Fu, Jiajia
    INTERNATIONAL BIODETERIORATION & BIODEGRADATION, 2018, 128 : 15 - 21
  • [50] The effect of EDTA and citric acid on phytoremediation of Cd, Cr, and Ni from soil using Helianthus annuus
    Turgut, C
    Pepe, MK
    Cutright, TJ
    ENVIRONMENTAL POLLUTION, 2004, 131 (01) : 147 - 154