Leaching Behaviour and Enhanced Phytoextraction of Additives for Cadmium-Contaminated Soil by Pennisetum sp.

被引：10
作者：
Li, Fangzhou [1 ]
Zhang, Yaping [1 ]
Hao, Shefeng [2 ]
Xu, Weiwei [2 ]
Shen, Kai [1 ]
Long, Zhen [1 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Peoples R China
[2] Geol Survey Inst Jiangsu Prov, Nanjing 210018, Peoples R China
来源：
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2020年 / 104卷 / 05期
关键词：
Additives; Leaching behavior; Phytoextraction; Cadmium; Pennisetum sp; HEAVY-METALS; PADDY SOILS; ACCUMULATION; CD; GROWTH; PB; TRANSLOCATION; EXTRACTION; SPECIATION; MECHANISM;
D O I：
10.1007/s00128-020-02851-8
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The leaching behavior of five additives, including citric acid (CA), wood vinegar (WV), 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), polyaspartic acid (PASP) and FeCl3, was investigated to evaluate the possibility of enhanced phytoextraction of Pennisetum sp. from cadmium-contaminated soil. FeCl3 and CA have the highest leaching potential due to the ability that could convert large amounts of mobile fractions of Cd. The pot experiment showed that HEDP, WV, and PASP treatments could not only significantly increase the biomass of Pennisetum sp., but also maintain high uptake capacity of Cd by activating the stable fractions. HEDP has the highest Cd extraction efficiency and metal extraction ratio (MER) value. The phytoremediation efficiency could be improved mainly by increasing the biomass of the tolerant shoots, and Pennisetum sp. seems to have the maximum potential of phytoextraction to Cd with HEDP which could achieve a higher phytoextraction effect than Cd-hyperaccumulator.
引用
收藏
页码：658 / 667
页数：10
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