[Safe Utilization Effect of Passivator on Mild to Moderate Cadmium Contaminated Farmland].
Huan Jing Ke Xue
; 45(2): 1098-1106, 2024 Feb 08.
Article
in Zh
| MEDLINE
| ID: mdl-38471947
ABSTRACT
In order to study the safe utilization of acid cadmium ï¼Cdï¼ contaminated soilï¼ light and moderate Cd-contaminated farmland in Shangluoï¼ Shaanxi Province was taken as the research objectï¼ and limeï¼ biocharï¼ and calcium magnesium phosphate fertilizer were applied. Through the wheat-maize rotation experimentï¼ the safe utilization effect of different amounts of passivator on Cd-contaminated soil was exploredï¼ and the best ratio of passivator was selected. The results showed thatï¼ â the soil quality could be improved to varying degrees by applying the passivator. â¡ After the application of amendmentsï¼ the grain yield of wheat and maize increased to different degrees. ⢠The lime 2 340 kg·hm-2 ï¼C3ï¼ treatment had the best effectï¼ which increased the soil pH of wheat and corn by 1.453 and 1.717 unitsï¼ respectivelyï¼ and reduced the available Cd content by 34.38% and 30.20%ï¼ respectively. ⣠The application of biochar 1 800 kg·hm-2 ï¼B2ï¼ treatment had the best effect on reducing the Cd contents in wheat rootsï¼ strawsï¼ and grainsï¼ which were significantly reduced by 53.60%ï¼ 38.86%ï¼ and 52.96%ï¼ respectivelyï¼ compared with that in CK. The Cd content in wheat grains was reduced to 0.09 mg·kg-1ï¼ which was lower than the limit value of wheat Cd ï¼0.1 mg·kg-1ï¼ specified in the "National food safety standard food pollutant limit" ï¼GB 2762-2017ï¼. The application of the biochar 1 260 kg·hm-2 ï¼B1ï¼ treatment had the best comprehensive effect on reducing the Cd contents of maize rootsï¼ strawsï¼ and grainsï¼ which were significantly reduced by 43.74%ï¼ 53.20%ï¼ and 94.57%ï¼ respectivelyï¼ compared with that in CK. The Cd content of maize grains was reduced to 0.001 9 mg·kg-1ï¼ which was far lower than the limit value of maize Cd ï¼0.1 mg·kg-1ï¼ specified in the "National food safety standard food pollutant limit" ï¼GB 2762-2017ï¼. Thereforeï¼ under the conditions of the field experimentï¼ considering the influence of various indexesï¼ biochar had the best effect on farmland soil in the wheat-maize rotation area with mild to moderate Cd pollution.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oxides
/
Oryza
/
Soil Pollutants
/
Calcium Compounds
/
Environmental Pollutants
Language:
Zh
Journal:
Huan Jing Ke Xue
Year:
2024
Document type:
Article
Affiliation country:
China
Publication country:
CHINA
/
CN
/
REPUBLIC OF CHINA