|
| Immobilization materials for cadmium and arsenic contaminated soil remediation and their scientific metrology research |
| Received:May 29, 2019 |
| View Full Text View/Add Comment Download reader |
| KeyWord:heavy metals;cadmium;arsenic;amendment materials |
| Author Name | Affiliation | E-mail | | LI Ying | College of Resource and Environment, China Agricultural University, Beijing 100193, China | | | ZHU Si-hang | College of Resource and Environment, China Agricultural University, Beijing 100193, China
Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China
Key Laboratory of Arable Land Conservation(North China), Ministry of Agriculture, Beijing 100193, China | | | SHANG Jian-ying | College of Resource and Environment, China Agricultural University, Beijing 100193, China
Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China
Key Laboratory of Arable Land Conservation(North China), Ministry of Agriculture, Beijing 100193, China | gyshang@cau.edu.cn | | HUANG Yi-zong | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | |
|
| Hits: 2138 |
| Download times: 2231 |
| Abstract: |
| This paper used the Web of Science (WOS)core collection database to gather statistics on soil cadmium and arsenic single contamination during 2014 to 2018. It was found that cadmium and arsenic contamination in soil were still widely concerned, and China published the most articles in this field. By using CiteSpace software, we found that application of immobilization materials was one of the most popular technologies for soil cadmium and arsenic remediation. Based on this, this paper summarized the common immobilization materials and mechanism, and the indoor research and remediation practice related to immobilization materials were summarized, respectively. For inorganic immobilization materials, lime changes the effectiveness of heavy metals mainly by regulating soil pH; phosphates immobilize heavy metal through co-precipitation and site competition mechanism; metal oxides showed a good remediation effect on heavy metal by surface complexation and reduction; sepiolite and palygorskite were cheap and green, and had large specific surface areas, and showed significant amendment effect on heavy metal. For organic immobilization materials, biochar shows significant immobilization effect on heavy metal due to its rich functional group and high surface area. Organic waste contained large quantity of humic substances, organic matter, and microorganisms, and showed significant effect on heavy metal immobilization. In addition, the typical field remediation projects of cadmium/arsenic contaminated soil in China and other areas of the world were introduced. Overall, it is found that the metal and its oxides, compost, biochar, lime and clay minerals are applied widely in the world. To provide the guidance for cadmium and arsenic contaminated soil remediation, we finally discussed the urgent problems that need to be solved in the application of immobilization materials. |
|
|
|
