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文章摘要
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
  
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)
作者单位
罗敏 西华师范大学环境科学与工程学院 
邓红艳 西华师范大学环境科学与工程学院 
易会宇 西华师范大学环境科学与工程学院 
叶勇 西华师范大学环境科学与工程学院 
胡亚菲 西华师范大学环境科学与工程学院 
李婷 西华师范大学环境科学与工程学院 
李文斌 西华师范大学环境科学与工程学院 
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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 Cu2+ 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 Cu2+ 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 Cu2+ ranged from 85.38 mmol/kg to 257.54 mmol/kg. The adsorption of Cu2+ 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 Cu2+.
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