Free Radicals Produced from the Oxidation of Ferrous Sulfides Promote the Remobilization of Cadmium in Paddy Soils During Drainage DOI
Hui Huang, Xiaobo Ji,

Liang-Yi Cheng

et al.

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(14), P. 9845 - 9853

Published: June 30, 2021

Most of the cadmium (Cd) accumulated in rice grains is derived from its remobilization soils during grain filling period when paddy water drained. The factors affecting Cd upon drainage remain poorly understood. Here, we show that free radical effect produced oxidation ferrous sulfides an important mechanism oxidative soil drainage. When were flooded, microbial sulfate reduction results formation various metal including CdS and FeS. Upon drainage, FeS considerable amounts hydroxyl radicals (OH•), which could oxidize directly thereby promote dissolution increase mobilization soils. also form a within-sulfide voltaic cell, with protecting due to lower electrochemical potential former. However, this was short-lived surpassed by effect. composition formed flooding vary soils, affected both effects offered different sulfides. These are applicable biogeochemistry other chalcophile trace elements coupled sulfur iron redox cycles anoxic-oxic transition many environments.

Language: Английский

Soil carbon and nitrogen cycles driven by iron redox: A review DOI
Lihu Liu, Ningguo Zheng, Yongxiang Yu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 918, P. 170660 - 170660

Published: Feb. 6, 2024

Language: Английский

Citations

19
The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems DOI

Zhuonan Hou,

Ruihong Wang, Suhwan Chang

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 921, P. 171126 - 171126

Published: Feb. 21, 2024

Language: Английский

Citations

17
Effect of nitrogen, phosphorus and potassium fertilization management on soil properties and leaf traits and yield of Sapindus mukorossi DOI Creative Commons
Juntao Liu,

Dongnan Wang,

Xiaoli Yan

et al.

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: March 11, 2024

Rational fertilization is the main measure to improve crop yield, but there are differences in optimal effects of nitrogen (N), phosphorus (P) and potassium (K) rationing exhibited by same species different regions soil conditions. In order determine optimum ratio for high yield Sapindus mukorossi western Fujian provide scientific basis. We carried out experimental design with ratios N, P K investigate on yield. leaf physiology properties. Results showed that reached highest value (1464.58 kg ha -1 ) at N 2 treatment, which increased 1056.25 compared control. There were significant responses properties physiological factors treatments. Factor analysis integrated scores characteristic under treatment highest, effectively improved fertility traits. The a highly linear positive correlation (r=0.70, p <0.01). Passage available content, organic carbon area index key affect RDA most important recommend was 0.96Kg 0.80Kg 0.64Kg per plant. Reasonable can traits, while excessive has negative fertility, This study provides theoretical support cultivation woody oil seed species.

Language: Английский

Citations

17
Mutual Interactions between Reduced Fe-Bearing Clay Minerals and Humic Acids under Dark, Oxygenated Conditions: Hydroxyl Radical Generation and Humic Acid Transformation DOI
Qiang Zeng, Xi Wang, Xiaolei Liu

et al.

Environmental Science & Technology, Journal Year: 2020, Volume and Issue: 54(23), P. 15013 - 15023

Published: Sept. 29, 2020

Hydroxyl radicals (·OH) exert a strong impact on the carbon cycle due to their nonselective and highly oxidizing nature. Reduced iron-containing clay minerals (RIC) are one of major contributors formation ·OH in dark environments, but interactions with humic acids (HA) poorly known. Here, we investigate mutual between RIC HA under oxygenated conditions. decreased oxidation rate structural Fe(II) significantly promoted yield. dissolved fraction from form an aqueous Fe(II)–HA complex. were generated through both heterogeneous (through Fe(II)) homogeneous pathways species). RIC-mediated production by providing H2O2 react electrons regenerate Fe(II)–HA. This efficient pathway was responsible for increased Abundant molecular size, bleached chromophores, oxygen-containing functional groups HA. These changes resembled photochemical transformation The interaction redox-fluctuating environments provides new fast turnover recalcitrant organic matters clay- HA-rich ecosystems such as tropical forest soils tidal marsh sediments.

Language: Английский

Citations

120
Free Radicals Produced from the Oxidation of Ferrous Sulfides Promote the Remobilization of Cadmium in Paddy Soils During Drainage DOI
Hui Huang, Xiaobo Ji,

Liang-Yi Cheng

et al.

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(14), P. 9845 - 9853

Published: June 30, 2021

Most of the cadmium (Cd) accumulated in rice grains is derived from its remobilization soils during grain filling period when paddy water drained. The factors affecting Cd upon drainage remain poorly understood. Here, we show that free radical effect produced oxidation ferrous sulfides an important mechanism oxidative soil drainage. When were flooded, microbial sulfate reduction results formation various metal including CdS and FeS. Upon drainage, FeS considerable amounts hydroxyl radicals (OH•), which could oxidize directly thereby promote dissolution increase mobilization soils. also form a within-sulfide voltaic cell, with protecting due to lower electrochemical potential former. However, this was short-lived surpassed by effect. composition formed flooding vary soils, affected both effects offered different sulfides. These are applicable biogeochemistry other chalcophile trace elements coupled sulfur iron redox cycles anoxic-oxic transition many environments.

Language: Английский

Citations

99