不同粒径腐殖酸颗粒对土壤有效态镉的影响

doi:10.3969/j.issn.1004-1524.2019.04.14

浙江农业学报 ›› 2019, Vol. 31 ›› Issue (4): 616-623.DOI: 10.3969/j.issn.1004-1524.2019.04.14

不同粒径腐殖酸颗粒对土壤有效态镉的影响

邹传¹, 郭彬², 林义成², 傅庆林^2,*, 刘琛², 丁能飞², 李凝玉², 李华²

1.浙江农林大学环境与资源学院,浙江杭州 311300;
2.浙江省农业科学院环境资源与土壤肥料研究所,浙江杭州310021

收稿日期:2018-12-12 出版日期:2019-04-25 发布日期:2019-04-19
通讯作者: *傅庆林,E-mail: fuql161@aliyun.com
作者简介:邹传(1994-),男,浙江建德人,硕士研究生,主要从事土壤重金属修复研究。E-mail: 596823811@qq.com
基金资助:
国家重点研发计划(2016YFD0800802);浙江省重点研发计划(2015C03020)

Effects of humic acid particles with different sizes on available cadmium in soil

ZOU Chuan¹, GUO Bin², LIN Yicheng², FU Qinglin^2,*, LIU Chen², DING Nengfei², LI Ningyu², LI Hua²

1. School of Environment and Resource Sciences, Zhejiang A&F University, Hangzhou 311300, China;
2. Institute of Environment, Resources, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2018-12-12 Online:2019-04-25 Published:2019-04-19

摘要/Abstract

摘要： 为探究腐殖酸对土壤有效态镉的影响及其作用机制,利用不同研磨条件下获得的腐殖酸的可溶成分与残渣成分,以吸附试验、电镜扫描、红外光谱分析等手段开展其对土壤Cd吸附,以及土壤pH、有机质含量的影响。结果表明,腐殖酸和滤渣对Cd的吸附曲线可用朗缪尔(Langmuir)吸附模型拟合。相对于腐殖酸,腐殖酸滤渣显著(P<0.05)降低了土壤pH和有效态Cd含量,而相应的腐殖酸溶液活化了土壤Cd。研磨处理后,腐殖酸残渣的比表面积和羧基基团含量增加,而腐殖酸溶液中酚羟基基团含量增加。经研磨处理,减小腐殖酸粒径,可提高腐殖酸溶解率,从而可分别强化腐殖酸可溶性组分和残渣组分对土壤Cd的活化和钝化作用。

关键词: 腐殖酸, 溶解液, 滤渣, 可溶性有机质, 有效态镉, 基团

Abstract: In order to explore the effect and mechanism of humic acid on available cadmium in soil, four kinds of humic acid particles with different sizes were obtained by different grinding treatments, and were analyzed by means of adsorption experiment, scanning electron microscopy and infrared spectroscopy. Furthermore, the effects of their soluble and residue fractions on Cd adsorption of soil were studied by pot experiments. The results showed that both the Cd adsorption curves of original humic acid and the residue fractions fitted well with the Langmuir adsorption model. Compared with original humic acid, the residue fractions significantly (P<0.05) decreased soil pH and soil available Cd content. Correspondingly, the soluble fractions added into soil increased the soil available Cd content. Scanning electron microscopy and infrared spectroscopy indicated that the specific surface area and carboxyl group of the residue fractions were increased with the smaller particle size, while the content of phenolic hydroxyl group of the soluble treatment was increased. In conclusion, the grinding-induced decrease in particle size of humic acid strengthened the adsorption effects on Cd for the residue fractions, and mobility effects on Cd for the soluble fractions, respectively.

Key words: humic acid, filtrate, filter residue, dissolved organic matter, available Cd, functional group

中图分类号:

S153
X131.3

邹传, 郭彬, 林义成, 傅庆林, 刘琛, 丁能飞, 李凝玉, 李华. 不同粒径腐殖酸颗粒对土壤有效态镉的影响[J]. 浙江农业学报, 2019, 31(4): 616-623.

ZOU Chuan, GUO Bin, LIN Yicheng, FU Qinglin, LIU Chen, DING Nengfei, LI Ningyu, LI Hua. Effects of humic acid particles with different sizes on available cadmium in soil[J]. , 2019, 31(4): 616-623.

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不同粒径腐殖酸颗粒对土壤有效态镉的影响

Effects of humic acid particles with different sizes on available cadmium in soil

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