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| 改良河岸带土壤对Cu2+吸附的环境影响机制 |
| Environmental Influence Mechanism of Cu2+ Adsorption by Amended Riverbank Soil |
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| DOI： |
| 中文关键词: Cu2+ 生物炭吸附 环境因素 河岸土壤 |
| 英文关键词: Cu2+ Biochar adsorption Environmental factor Riverbank soil |
| 基金项目:国家自然科学基金资助项目（41271244）；四川省教育厅基金资助项目（18ZB0576）；四川省科技厅基金资助项目（2018JY0224） |
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| 中文摘要: |
| 通过添加质量比1%的生物炭（空心莲子草制备）、生物炭负载两性黏土两种材料改良川东北地区嘉陵江、渠江和涪江沿岸土壤，探索环境因素对改良土壤吸附Cu2+的影响。结果表明：当各改良河岸土样pH值为5、离子强度为0.05 mol/L、温度40℃时对Cu2+的吸附量达到最高，最大吸附量（q m）为85.38 mmol/kg～257.54 mmol/kg；Cu2+的吸附符合Langmuir等温吸附模型，是一个自发、吸热和熵增的过程；土壤改良效果表现为涪江>渠江>嘉陵江；土样CEC和比表面积是影响Cu2+吸附能力的主要因素。 |
| 英文摘要: |
| The effects of environmental factors on the adsorption of Cu2+ by amended soil were studied by adding 1% mass ratio of biochar (prepared by Alternanthera philoxeroides) and biochar containing amphoteric clay to the riverbank soil along Jialing River, Qu River and Fu River in Northeast Sichuan. The results showed that Cu2+ adsorption capacity of each amended soil sample reached the heights when pH value of the soil was 5, ionic strength was 0.05 mol/L and temperature was 40 ℃, the maximum adsorption capacity (QM) of Cu2+ ranged from 85.38 mmol/kg to 257.54 mmol/kg. The adsorption of Cu2+ was a spontaneous, endothermic and entropy increasing process, and was in accord with Langmuir isothermal adsorption model. The improvement effects of the amended soil were as Fu River>Qu River>Jialing River. CEC and specific surface area of the soil were the main factors affecting the adsorption capacity of Cu2+. |
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