/manager/Index ${session.getAttribute("locale")} 5 Experimental study on microwave pyrolysis of an Indonesian low-rank coal /manager/Repository/uon:21484 Sat 24 Mar 2018 08:03:36 AEDT ]]> The influence of long-term ageing on arsenic ecotoxicity in soil /manager/Repository/uon:43453 Cucumis sativus L. (cucumber). The study showed that increasing ageing time of As from 0.25 to 5 years increased the EC10 and EC50 values by 4.0 and 1.76 fold, respectively. The dependence of ageing on soil properties was also examined, although only Freundlich sorption parameters were correlated to the ageing factor (r = 0.68, P = 0.028). Soils with high adsorption capacity also showed the greatest change in toxicity over 5 years. In addition, data was compiled from relevant literature to develop a model for As ecotoxicity. The combined model (n = 54) showed no relationship with pH but was correlated to the oxalate extractable iron content and %clay. Arsenate ecotoxicity (EC50, mg/kg) in the multivariate model was related to oxalate iron content, %clay and ageing time. Thus, the results of this study have significant implications for risk assessment of long-term As contaminated soils.]]> Mon 19 Sep 2022 15:12:26 AEST ]]>