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| 炭负载膨润土对河岸土铜迁移的影响模拟 |
| Effect of Biochar based Bentonite on Copper Migration in Riverbank Soil |
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| DOI： |
| 中文关键词: 铜迁移 生物炭 膨润土 河岸土 |
| 英文关键词: Copper migration Biochar Bentonite Riverbank soil |
| 基金项目:国家自然科学基金资助项目(41271244)；西华师范大学基本科研业务基金资助项目(18B023)；四川省科技厅基金资助项目(2018JY0224) |
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| 中文摘要: |
| 采用质量分数为1%的生物炭(C)和生物炭负载膨润土( CB )改良嘉陵江、渠江和涪江(川渝段)8个不同河岸土样，并以土柱实验模拟铜在各改良土样中的迁移和形态变化特征(原土样作为对照)。结果表明：C和CB 的添加均有利于沿岸土对铜的吸附，吸附能力和穿透时间表现为CB 改良土样>C改良土样>原土样；各改良沿岸土样对铜吸附能力表现为上游土样强于下游。供试土柱中铜累积量为16.43 g/kg~56.54 g/kg，且表现为CB改良土样>C改良土样>原土样的趋势。铜结合形态以碳酸盐结合态比例最大，铁锰氧化态次之，可交换态和有机态较少。 |
| 英文摘要: |
| Eight different riverbank soil samples from Jialing River, Qu River and Fu River(Sichuan Chongqing section) were modified by 1% (mass fraction) biochar(C)and biochar based bentonite (CB ) for simulating the migration and morphological change of copper through soil column experiment. The results showed that the addition of C and CB were beneficial to the adsorption of copper by riverbank soil. The adsorption capacity and penetration time ranked in the order of CB modified soil >C modified soil > original soil. The adsorption capacity of the modified soil was larger in the upstream than that in the downstream. Total copper accumulation in the testing samplers ranged from 16.43 g/kg to 56.54 g/kg, and in the order of CBmodified soil >C modified soil > original soil. Carbonate was the most in copper bound states, iron manganese oxidation form came second, the exchangeable and organic forms were less. |
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