Huu Hieu Ho

TL;DR: In this article, the authors investigated the distribution, controlling geochemical factors and contamination status of heavy metals in estuarine sediments near Cua Ong Habor, Ha Long Bay (Vietnam).

TL;DR: All heavy metals and arsenic display a V-shaped pH-dependent leaching pattern with important releases at pHs 2 and 11, and the lower leachability of all elements at alkaline pHs 9-11 is due to lower leached concentration of organic matter from the oxidized sediment.

TL;DR: In this article, the authors assessed the necessity of the normalization of element contents towards a reference element such as Al to compensate for granulometric and mineralogical effects of contamination by heavy metals and arsenic.

TL;DR: In this paper, the vertical and horizontal distributions of heavy metals and arsenic in sediments from the Cam River mouth were investigated, and the history, origin, and degree of contamination were assessed.

TL;DR: In this paper, the speciation and mobility of some selected trace metals (As, Cu, Mn, Pb and Zn) in sediments with depth was investigated in the Cam River-mouth (Vietnam) by collecting sediment cores and analysing porewater and sediment composition, complemented with single (ammonium-EDTA) and sequential (BCR 3-step) extractions and mineralogical analysis (XRD).