
Sedum plumbizincicola Straw Drying with Different De-Enzyme Methods
LIU Shuhong, CHEN Jin, JIANG Huidan, HU Zhixin, HE Aiguo, DAI Yanjiao
Sedum plumbizincicola Straw Drying with Different De-Enzyme Methods
In order to screen efficient de-enzyme methods during dewatering process of Sedum plumbizincicola straw after harvesting, we investigated the dewatering of Sedum plumbizincicola straw with de-enzyme treatments of stir-fried, steam and microwave and directly dried in shadow. In this experiment, the differences of water-loss rate, water-loss ratio, moisture content and cadmium content of Sedum plumbizincicola straw with different treatments were analyzed. The results showed that the water-loss rate and water-loss ratio of the straw with de-enzyme process were higher than those of the straw directly dried in shadow, and the straw with de-enzyme process had lower moisture content at the end of treatment. At the beginning of drying in shadow after de-enzyme treatments, the water-loss rate, water-loss ratio and water-loss amount of the straw with stir-fried were significantly higher than those with steam and microwave de-enzyme treatments. During the drying process, it took the shortest time for the moisture content of the straw dropping below 70% with stir-fried de-enzyme treatment, which was only 120 h, while it took 180 h and 216 h for the moisture content of the straw dropping below 70% with steam and microwave de-enzyme respectively. At the end of drying in shadow, the straw with stir-fried and steam de-enzyme treatments had the most water-loss amount, 459.40 g and 459.80 g, respectively. And different de-enzyme treatments had no significant impact on the Cd content of straw. De-enzyme treatment can increase the drying rate of Sedum plumbizincicola straw after harvesting and will not have a significant impact on the Cd content of the straw. Stir-fried de-enzyme treatment can accelerate water dissipation and shorten the time for reducing the moisture content below 70%. The straw after stir-fried de-enzyme treatment is more in line with the requirements of transshipment, incineration or other disposal methods. This study provides a new idea and technical verification for the development of post-production disposal technology of hyperaccumulator engineering restoration application.
Sedum plumbizincicola / de-enzyme / drying in shadow / water-loss / Cd pollution {{custom_keyword}} /
表1 不同杀青阶段伴矿景天秸秆水分损失情况 |
杀青方式 | 杀青阶段(0~0.1 h) | 冷却阶段(0.1~1 h) | |||
---|---|---|---|---|---|
失水量/g | 减重占比 | 失水量/g | 减重占比 | ||
翻炒 | 75.88 Aa | 15.18% aA | 16.06 bB | 3.21% bB | |
蒸汽 | -9.97 dD | -1.99% dA | 15.96 bB | 3.19% bB | |
微波 | 5.95 bB | 1.19% bB | 40.01 aA | 8.00% aA | |
CK | 0.00 cB | 0.00% cB | 0.00 dD | 0.00% dD |
注:同一列中不同大小写字母表示在0.01和0.05水平上差异显著。 |
表2 杀青处理对伴矿景天秸秆镉含量的影响 mg/kg |
杀青前 | 翻炒杀青 | 蒸汽杀青 | 微波杀青 | CK |
---|---|---|---|---|
65.86 Aa | 64.37 aA | 65.17 aA | 67.13 aA | 66.47 aA |
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