浙江农业学报 ›› 2024, Vol. 36 ›› Issue (12): 2774-2783.DOI: 10.3969/j.issn.1004-1524.20231166

• 环境科学 • 上一篇    下一篇

几种无机与有机材料对镉的吸附和钝化效果比较

李秋铷1,2(), 蔡晶晶3, 李华2, 俞海平4, 裘高扬2, 刘俊丽2, 郭彬2,*()   

  1. 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
    3.浙江中地净土科技有限公司,浙江 诸暨 311800
    4.绍兴市上虞区农业技术推广中心,浙江 绍兴 312399
  • 收稿日期:2023-10-01 出版日期:2024-12-25 发布日期:2024-12-27
  • 作者简介:李秋铷(1996—),女,广东清远人,硕士研究生,主要从事农业资源与环境方面的研究。E-mail:451733421@qq.com
  • 通讯作者: *郭彬,E-mail:ndgb@163.com
  • 基金资助:
    农产品质量安全危害因子与风险防控国家重点实验室财政专项(10417000024CE0601G)

Comparison of adsorption and passivation effects of inorganic and organic materials on cadmium

LI Qiuru1,2(), CAI Jingjing3, LI Hua2, YU Haiping4, QIU Gaoyang2, LIU Junli2, GUO Bin2,*()   

  1. 1. College of Environmental 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
    3. Zhejiang Zhongdi Pure Land Technology Co., Ltd., Zhuji 311800, Zhejiang, China
    4. Shangyu Agricultural Technology Extension Center, Shaoxing 312399, Zhejiang, China
  • Received:2023-10-01 Online:2024-12-25 Published:2024-12-27

摘要:

为了明确无机与有机材料对水体中镉(Cd)的吸附,以及对土壤Cd的钝化效果差异,选择粉煤灰、硅藻土、椰壳炭、麦饭石、蛭石粉、凹凸棒粉、蒙脱石粉、腐殖酸、香榧壳蒲、米糠、聚丙烯酰胺、壳聚糖12种钝化材料,采用电镜观察、Cd溶液水体吸附与土壤钝化培养试验,比较各类材料的表面性状、Cd最大吸附量,以及对土壤有效态Cd含量和土壤理化性质的影响。结果表明: 腐殖酸、香榧壳蒲、蒙脱石粉、蛭石粉、凹凸棒粉、硅藻土等材料的表面呈颗粒或层状结构,结构较为松散。不同材料对水体中的Cd均具有较好的吸附性能,最大吸附量从高到低依次为腐殖酸(22.08 mg·g-1)>香榧壳蒲(21.99 mg·g-1)>蒙脱石粉(16.24 mg·g-1)>椰壳炭(15.63 mg·g-1)>蛭石粉(13.81 mg·g-1)>凹凸棒粉(12.67 mg·g-1)>粉煤灰(10.22 mg·g-1)>聚丙烯酰胺(9.20 mg·g-1)>米糠(8.72 mg·g-1)>硅藻土(5.90 mg·g-1)>壳聚糖(4.79 mg·g-1)>麦饭石(3.65 mg·g-1)。将这12种材料施入土壤后(施用量1%),除聚丙烯酰胺和硅藻土外,土壤有效态Cd含量显著(P<0.05)降低,降幅在10.66%~32.68%,其中,凹凸棒粉和香榧壳蒲处理的土壤有效态Cd含量降幅最大,分别为32.68%和28.95%。研究成果可为土壤重金属钝化材料的选择提供参考。

关键词: 镉, 吸附, 有效态镉, 钝化

Abstract:

In order to identify the adsorption effects of inorganic and organic materials on cadmium (Cd) in water and their passivation effects on soil Cd, twelve materials (fly ash, diatomite, coconut shell charcoal, medical stone, vermiculite powder, attapulgite powder, montmorillonite powder, humic acid, Chinese torreya shell, rice bran, polyacrylamide, chitosan) were selected as test materials, electron microscopy observation, Cd solution adsorption tests, and soil passivation culture experiments were carried out. The evaluated parameters were surface properties, maximum Cd adsorption capacity, and soil physiochemical properties. It was shown that the materials like humic acid, Chinese torreya shell, montmorillonite powder, vermiculite powder, attapulgite powder and diatomite had granular or layered structure and loose structure. All the test materials exhibited good adsorption properties for Cd in water. The maximum adsorption capacity of test materials decreased as humic acid (22.08 mg·g-1)>Chinese torreya shell (21.99 mg·g-1)>montmorillonite powder (16.24 mg·g-1)>coconut shell charcoal (15.63 mg·g-1)>vermiculite powder (13.81 mg·g-1)>attapulgite powder (12.67 mg·g-1)>fly ash (10.22 mg·g-1)>polyacrylamide (9.20 mg·g-1)>rice bran (8.72 mg·g-1)>diatomite (5.90 mg·g-1)>chitosan (4.79 mg·g-1)>medical stone (3.65 mg·g-1). Except polyacrylamide and diatomite, application of these materials into soil (application rate of 1%) significantly (P<0.05) reduced the content of available Cd in soil by 10.66%-32.68%. Among them, application of attapulgite powder and Chinese torreya shell exhibited the highest reduce rate of soil available Cd by 32.68% and 28.95%, respectively. These findings provided theoretical basis for selecting soil passivators of heavy metals.

Key words: cadmium, adsorption, soil available cadmium, passivation

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