${session.getAttribute("locale")} 5 Distribution of arsenic and heavy metals in soils and surface waters in Central Victoria (Ballarat, Creswick and Maldon) Wed 07 Apr 2021 13:32:06 AEST ]]> Distribution of metals and arsenic in soils of Central Victoria (Creswick-Ballarat), Australia > Al >> Zn > Mn >> As > Pb > Cu ≈ Ni ≈ Cr > Co. Mean levels of Zn (273 mg/kg) and As (39 mg/kg) in soils were well above normal global ranges and could be of local importance as a source of contamination. Extreme soil levels of Ni, Cr, Pb, and Fe were found in old mining waste material and pointed to the anthropogenic influence on the environment. Most of the measured elements showed marked spatial variations except Co. As contents were significantly higher than the tolerable level (ANZECC (1992) guidelines), with values up to 395.8 mg/kg around the mine tailings site. Mn soil contents were strongly associated with Co and Ni contents in most soils. High Fe contents (average approximately 41,465 mg/kg) in soils developed on basalt bedrock were correlated with Zn contents (average 400 mg/kg), and it is highly likely that Fe-oxides serve as sinks for Zn under near-neutral soil pH (6.3) conditions. Between the two major bedrock lithologic units, Ordovician sediments and Tertiary basalt, a clear enrichment of metals was found in the latter that was reflected in high background levels of elements. Among the various size fractions, silt (average approximately 45.1%) dominated most of the soils. In general and with a few exceptions, the concentrations of measured elements did not show significant correlations to other measured soil parameters, e.g., clay, silt and sand size fractions, organic matter, soil pH, and cation exchange capacity. © 2007 Springer Science+Business Media, Inc.]]> Wed 07 Apr 2021 13:31:51 AEST ]]> Clay mineralogy of central Victorian (Creswick) soils : Clay mineral contents as a possible tool of environmental indicator smectite > mixed-layer (ML) ≈ vermiculite. The soil clay mineralogy did not change systematically with depth (0- 10, 10- 20 and 20- 30 cm) and showed large variations spatially. The high proportion of kaolinite was probably due to the removal of 2:1 phyllosilicates by the formation of 1:1 kaolinite through weathering, which also reduced the cation exchange capacity (CEC) and electrical conductivity (EC, soil: water ratio of 1:5) of soils by aging. Soils were classified as silty loam to loam with a low clay size (≤ 2]]> Wed 07 Apr 2021 13:31:51 AEST ]]>