4.7 Article

Adsorption effect and the removal mechanism of silicate composite biochar particles on cadmium in soil

期刊

CHEMOSPHERE
卷 303, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.134970

关键词

Handling Editor; Grzegorz Lisak; Silicate composite biochar; Cadmium; Passivation; Recovery; Regeneration

资金

  1. Wuhan Science and Technology Project of Hubei Province of China [2020020601012264]
  2. National Key Research and Development Program of China [2018YFD0800703, 2016YFD0800702]
  3. National Natural Science Foundation of China [41571283]
  4. Fundamental Research Funds for the Central Universities [2662018PY078]

向作者/读者索取更多资源

Silicate composite biochar with high strength and magnetism was prepared, which can effectively remove cadmium from soil through the process of application-separation-desorption-reuse. The study also found that the biochar particles have a certain mass loss after each recycling.
Ordinary biochar has the disadvantages of low strength and fragility, and it is difficult to be separated in heavy metal contaminated soil after the remediation process. In order to realize the recovery and reuse of biochar, we prepared silicate composite biochar (SCB) and the magnetic silicate composite biochar (MSCB) with consistent particle size and high hardness. As well as the passivation effect and mechanism of the material on cadmium in soil was also investigated. The results showed that: (1) The MSCB had good hydraulic properties and strong magnetism, which can be quickly separated from the soil under the condition of external magnetic field. (2) The MSCB can remove 30.32%-38.80% of cadmium in the soil after three times of application-separation -desorption-reuse, as well as the SCB can remove 28.30%-35.78% of cadmium from the soil. (3) The recovered SCB and MSCB had a certain mass loss, the mass loss rate of the biochar particles was in the range of 2.65%-4.90% after each time of recycling. (4) MSCB mainly immobilized cadmium ions through pore interception, complexation of oxygen-containin/iron-containin functional group and precipitation reaction.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据