| 水环境中天然有机物对纳米颗粒吸附铅和镉的不同作用 |
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| 引用本文： | 徐晓燕,张鹏,朱静,冯波,卿太平,张雪林. 水环境中天然有机物对纳米颗粒吸附铅和镉的不同作用[J]. 环境化学, 2021, 40(2): 571-582 |
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| 作者姓名： | 徐晓燕 张鹏 朱静 冯波 卿太平 张雪林 |
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| 作者单位： | 湘潭大学环境与资源学院,湘潭,411105;湖南省棉花科学研究所,常德,415101 |
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| 基金项目： | 国家自然科学基金(51708475,21777135);湖南省自然科学基金(2018JJ3496,2019JJ50596,2019JJ40283)资助. |
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| 摘 要： | 为阐明天然有机物(NOM)在纳米颗粒(NPs)吸附重金属中的作用,研究了蛋白质(牛血清白蛋白,BSA)、碳水化合物(海藻酸钠,NaAlg)和腐殖酸(HA)对二氧化钛纳米颗粒(TNPs)和氧化铈纳米颗粒(CNPs)聚集沉降和吸附Cd2+和Pb2+的影响.结果表明,当Pb2+和Cd2+在20-120 mg-L-1范围内,H...
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| 关 键 词： | 天然有机物 纳米颗粒 聚集沉降 重金属 吸附 |
The varying roles of natural organic matters on nanoparticles adsorbing Cd2+and Pb2+in water environment |
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| XU Xiaoyan,ZHANG Peng,ZHU Jing,FENG Bo,QING Taiping,ZHANG Xuelin. The varying roles of natural organic matters on nanoparticles adsorbing Cd2+and Pb2+in water environment[J]. Environmental Chemistry, 2021, 40(2): 571-582 |
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| Authors: | XU Xiaoyan ZHANG Peng ZHU Jing FENG Bo QING Taiping ZHANG Xuelin |
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| Affiliation: | (College of Environment and Resources,Xiangtan University,Xiangtan,411105,China;Cotton Sciences Research Institute of Hunan,Changde,415101,China) |
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| Abstract: | In order to elucidate the role of natural organic matters(NOM)in nanoparticles(NPs)adsorbing heavy metals,current work investigated effects of protein(bovine serum albumin,BSA),carbohydrate(sodium alginate,NaAlg),and humic acid(HA)on the aggregation and sedimentation of TiO2 NPs(TNPs)and CeO2NPs(CNPs),and on the adsorption of Cd2+and Pb2+by TNPs and CNPs.In the range of 20—120 mg·L-1of Pb2+and Cd2+,BSA had little effect on the adsorption,whereas HA and NaAlg significantly accelerated these metals adsorption by TNPs and CNPs(P<0.05).In the presence of HA and NaAlg,the adsorption by TNPs increased 14%—41%and 16%—57%for Pb2+,and 12%—112%and 22%—143%for Cd2+,respectively.Compared with CNPs alone,HA and NaAlg increased 21%—71%and 23%—65%for Pb2+,and 26%—45%and 45%—91%for Cd2+,respectively.The adsorption of Pb2+and Cd2+by NPs and NPs-NOM was well fitted by Freundlich model.The increase in ionic strength inhibited the adsorption of Pb2+and Cd2+by NPs and NPs-HA/NaAlg,and the increase of pH increased the adsorption of Pb2+and Cd2+ by NPs and NPs-HA/NaAlg. |
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| Keywords: | natural organic matters nanoparticles aggregation and sedimentation heavy metal adsorption. |
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