Evaluating temperature effects on leaching behavior of geogenic arsenic and boron from crushed excavated rocks using shaking and nonshaking batch tests

The leaching behavior of arsenic and boron is evaluated in this work through two types excavated rocks with geogenic contaminants under different temperatures. Excavated are expected to be used embankments appropriate countermeasures being taken against the risks brought about by contamination. might change because changes ground temperature. However, effects temperature on such have not been well examined. Herein, batch tests at temperatures between 5 60 °C were performed shaking nonshaking conditions. Mudstone shale rock crushed into particles smaller than 2 mm, which required for tests. carried out durations ranging from 6 h 15 days kinetics also require careful evaluation. After conducting 40 °C, mudstone sample leached concentrations approximately 0.7 1.0 mg/L, respectively. 20 40% higher those a °C. Elevated seen increase toxic elements. For sample, rate was 7.7 × 10-2/h 2.5 times greater value 30 showed amounts tests, especially elevated As unrealistic estimations should avoided, suggested. Moreover, lasting longer necessary due relatively slow dissolution minerals.