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| Bibliometric analysis of the effects of heavy metal pollution remediation technologies on paddy fields |
| Received:August 31, 2018 Revised:October 15, 2018 |
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| KeyWord:bibliometrics;paddy fields;heavy metal;cadmium;remediation technology;cadmium reduction rate |
| Author Name | Affiliation | E-mail | | DU Zhi-peng | College of Resources and Environment Sciences, China Agricultural University
Beijing Key Laboratory of Prevention, Control and Restoration of Farmland Soil Pollution, Beijing 100193, China | | | SU De-chun | College of Resources and Environment Sciences, China Agricultural University
Beijing Key Laboratory of Prevention, Control and Restoration of Farmland Soil Pollution, Beijing 100193, China | dcsu@cau.edu.cn |
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| Abstract: |
| The evaluation of remediation technologies for heavy metal contaminated paddy fields is essential for developing and implementing soil remediation strategies. By means of literature research, we summarized the progress of research on remediation technologies and their performance on heavy metal pollution in domestic and foreign paddy soils for the period 2006-2017. The related software (HistCite and Excel)was used to analyze relevant literature from the China National Knowledge Infrastructure (CNKI), namely the China Academic Journals Full-text Database, as well as the Web of Science Core Collection Database. The techniques and effects of remediating cadmium pollution in paddy fields under field conditions were obtained through screening and sorting. We found that an approximately equal number of papers had been published in English and Chinese over the past 12 years. The number of Chinese articles issued increased rapidly over the past six years; however, the average total local citation score (TLCS/R)was relatively low as a whole. The main journals in this field included Journals of Agro-Environment Science, Environmental Sciences, Ecology and Environment, Hazardous Materials, Environmental Pollution, and Chemosphere. The major remediation and control technologies were immobilization-stabilization remediation techniques with base-applied passivators, the screening of heavy metal low-accumulation rice varieties, and agronomic measures, which could be used with various heavy metal ions such as cadmium, lead, and arsenic. The top five effective remediation techniques for cadmium contaminated soils included screening for low cadmium accumulation rice varieties, clay minerals, foliar control agents and stabilizing amendments, inorganic combined amendments, and water management and stabilizing amendments. Their average cadmium reduction rates were 74.50%, 46.85%, 44.52%, 42.19%, and 41.19%, respectively. |
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