摘要
采用质量分数为1%的生物炭(C)和生物炭负载膨润土(C_(B))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C_(B)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C_(B)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C_(B)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。
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(C_(B))for simulating the migration and morphological change of copper through soil column experiment.The results showed that the addition of C and C_(B) were beneficial to the adsorption of copper by riverbank soil.The adsorption capacity and penetration time ranked in the order of C_(B)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 C_(B)modified 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.
作者
陈凌源
何海霞
鄢心雨
梁倩
杨艳
李文斌
邓红艳
任兆刚
CHEN Ling-yuan;HE Hai-xia;YAN Xin-yu;LIANG Qian;YANG Yan;LI Wen-bin;DENG Hong-yan;REN Zhao-gang(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China)
出处
《环境监测管理与技术》
CSCD
2021年第5期68-71,共4页
The Administration and Technique of Environmental Monitoring
基金
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)。
关键词
铜迁移
生物炭
膨润土
河岸土
Copper migration
Biochar
Bentonite
Riverbank soil
