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Environmental Chemistry

Volume 19 Number 1 2022

EN21163Kaolinitic clays as a potential source of dioxins in the Noosa River catchment, Queensland, Australia

Suzanne Vardy

, Jacob Gruythuysen and Brenda Baddiley

pp. 1-12

Environmental context. Dioxins have been found along the east coast of Australia in agricultural areas where there is no obvious source of dioxins. These dioxins have an unusual signature that does not match common industrial sources, but it has been suggested that they may be associated with pesticide use. This study found a strong correlation between dioxins with this unique signature and the amount of a kaolinitic clay in the sediments sampled.

EN21163 Abstract | EN21163 Full Text | EN21163PDF (3.1 MB) | EN21163Supplementary Material (656 KB) Open Access Article

EN21155Effect of dissimilatory iron reduction and Carex DOM on Cr^VI reduction by Enterobacter sp. PY16 isolated from wetland soil

Yao Shu, Xiaofeng Gong

, Yuanhang Li, Yuheng Sun, Danni Niu and Hongting Ye

pp. 13-22

Environmental context. Dissimilatory iron reduction and Carex-produced dissolved organic matter (DOM) have an important influence on Cr(VI) reduction by the Fe(III)-reducing bacterium Enterobacter. The role of Carex DOM and ferrihydrite in the biotransformation of Cr(VI) by the bacterial isolate was investigated. The findings should help underpin the remediation and detoxification of chromium in anaerobic environments, and provide promising insights into the quaternary system of bacterium/Fe(III)/Cr(VI)/DOM.

EN22030Metal contaminants of emerging concern in aquatic systems

Graeme E. Batley

and Peter G. C. Campbell

pp. 23-40

Environmental context. There is potential for a range of metals being used in emerging industries to pose a risk if they reach aquatic environments. This is assessed by evaluating known environmental concentrations against available toxicity data. In most instances risks are low with current usage. Areas are identified where additional data are needed.

EN22030 Abstract | EN22030 Full Text | EN22030PDF (1021 KB) Open Access Article

EN21153Usability of rice straw biochar for remediation and amelioration of vanadium contaminated soils in areas under acid rain leaching

Ya-qi Yu, Jin-xin Li and Jin-yan Yang

pp. 41-51

Environmental context. Biochar produced by agricultural wastes can be used for vanadium treatment, soil fertility improvement and agricultural waste disposal, whereas acid rain leaching may decrease its remediating efficiency of the metal contaminated soil. Therefore, the behaviour of vanadium in soil and changes in soil quality after biochar application were analysed under simulated acid rain leaching. The findings provide insight into acid rain leaching effects on soil quality, vanadium release from soil and biochar remediating efficiency.

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