Speciation changes of cadmium in mangrove (Kandelia candel (L.)) rhizosphere sediments
Date
2008Author
Liu Jingchun
刘景春
Yan Chongling
严重玲
Zhang Ruifeng
Lu Haoliang
卢豪良
Qin Guangqiu
Collections
- 生命科学-已发表论文 [5901]
Abstract
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.