Speciation Changes of Cadmium in Mangrove (Kandelia candel (L.)) Rhizosphere Sediments
Speciation Changes of Cadmium in Mangrove (Kandelia candel (L.)) Rhizosphere Sediments
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DOI：
10.1007/s00128-007-9351-z
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发表时间：
2008-01
影响因子：
2.7
通讯作者：
L. Jingchun;Y. Chong-ling;Z. Ruifeng;L. Haoliang;Q. Guangqiu
中科院分区：
文献类型：
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作者：
L. Jingchun;Y. Chong-ling;Z. Ruifeng;L. Haoliang;Q. Guangqiu
研究了镉在红树林（Kandelia candel（L.）结果表明，不同浓度的Cd对根际沉积物中Cd的含量有显著影响。研究结果表明，根系引起根际镉生物有效性的变化。根际沉积物中的可交换态和碳酸盐结合态Cd含量低于散装沉积物中的Cd含量，而根际沉积物中的铁锰氧化物结合态和O.M/硫化物结合态Cd含量则有所增加。沉积物中Cd含量的增加导致红树林植物体内Cd含量增加，其累积顺序为：根>下胚轴>茎和叶。
The speciation distribution of cadmium (Cd) in mangrove (Kandelia candel(L.)Druce) rhizosphere sediment was investigated after different contents of Cd being loaded. The study results indicated that root induced changes of Cd bioavailability in the rhizosphere. Exchangeable and carbonate bound Cd in the rhizosphere sediments were lower than these in the bulk sediments, whilst an increase in Fe–Mn oxides bound and O.M/sulfide bound fractions occurred in the rhizosphere sediment. Increased levels of Cd in sediments resulted in higher Cd concentrations in mangrove plants, and the order of accumulation was: roots > hypocotyls > stems and leaves.