Influence of root temperature on phytoaccumulation of As, Ag, Cr, and Sb in potato plants (Solanum tuberosum L. Var. Spunta)

被引:26
|
作者
Baghour, M [1 ]
Moreno, DA
Hernández, J
Castilla, N
Romero, L
机构
[1] Univ Granada, Fac Ciencias, Dept Biol Vegetal, E-18071 Granada, Spain
[2] EUP Ingn Tecn Agricola, Dept Biol Vegetal, Almeria 04120, Spain
[3] CIFA, Dept Hort, Granada 18004, Spain
来源
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2001年 / 36卷 / 07期
关键词
Solanum tuberosum; root-zone temperature; phytoextraction; arsenic; chromium; silver; antimony;
D O I
10.1081/ESE-100104886
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Three consecutive years of field experiments were carried out to investigate the effect of root temperatures induced by the application of mulches for phytoextraction of As, Ag, Cr and Sb using potato plants (roots, tubers, stems and leaflets). Four different plastic covers were used (T1: transparent polyethylene; T2: white polyethylene; T3: white and black coextruded polyethylene; and T4: black polyethylene), taking uncovered plants as control (TO). The different treatments had a significant effect on mean root temperatures (T0 = 16 degreesC, T1 = 20 degreesC, T2 = 23 degreesC, T3 = 27 degreesC and T4 = 30 degreesC) and induced a significantly different response in the As, Ag, Cr and Sb phytoaccumulation. The T3 treatment gave rise to the greatest phytoaccumulation of As, Ag, Cr and Sb in the roots, leaflets and tubers. In terms of the relative distribution of the phytoaccumulated metals (with respect to the total of the plant), As accumulated mainly in the roots and leaflets whereas Ag, Cr and Sb accumulated primarily in the tubers, establishing a close relationship between biomass development of each organ and phytoaccumulation capacity of elements in response to temperature in the root zone. With regard to phytoremediation using the potato plant, it is necessary to ascertain the influence and include the control of the thermal regime of the soil to optimize the phytoextraction of pollutants.
引用
收藏
页码:1389 / 1401
页数:13
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