@article{islam_akther_wahiduzzaman_hossain_parveen_2022, title={Fractionation and Contamination Assessment of Zn, Cu, Fe, and Mn in the Sundarbans Mangrove Soils of Bangladesh}, ISSN={["1549-7887"]}, DOI={10.1080/15320383.2022.2142513}, abstractNote={ABSTRACT Metals, particularly Zn, Cu, Fe, and Mn are distributed amongst several geochemical forms, influencing their solubility, mobility and toxicity in soil-water systems. In this study, Sundarbans mangrove forest soils were analyzed by sequential fractionation to understand the distribution of these metals into exchangeable (Exch), organically bound (OrgB), Mn-oxide bound (MnOB), amorphous Fe-oxide bound (AFeOB), crystalline Fe-oxide bound (CrFeOB) and residual (Res) fractions. Soil Fe was predominately present in the residual fraction (55–73%), and manganese was primarily bounded in residual (29–58%) and MnOB (5–31%) fractions. The Res, CrFeOB and AFeOB fractions of Cu account for more than 80% of the total Cu. Zinc was mostly concentrated in the residual fraction and varied between 57 to 78% of the total Zn. Principal Component Analysis (PCA) and correlation studies revealed that exchangeable and organically bound fractions of these metals were significantly correlated, and their concentrations were highly dependent on soil pH, soil texture, organic carbon and redox potential (p < 0.05). Despite low total concentration, ratio of secondary phase and primary phase (RSP) and risk assessment code (RAC) studies showed that Cu (RSP is 1–2.64 and RAC is 1–2.89) and Mn (RSP is 1–2.42 and RAC is 1–16.66) were at low to moderate contamination risk and Fe maintained no contamination (RSP and RAC < 1) in almost all the soils. In contrast, Zn showed low contamination risk in some areas. This contamination can cause adverse effects on the plants and soil-dwelling organisms of Sundarbans mangrove forest due to higher availability.}, journal={SOIL & SEDIMENT CONTAMINATION}, author={Islam, Md Mahfuz and Akther, Sayada Momotaz and Wahiduzzaman, Md and Hossain, Md Faruque and Parveen, Zakia}, year={2022}, month={Nov} }