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Role of phosphorus on the biogeochemical behavior of cadmium in the contaminated soil under leaching and pot experiments

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Journal of Environmental Sciences 2024年第3期137卷 488-499页

作者： Hui Jia yifanwu Mengqi Zhang Jinhui Ye Daolin Du He Wang Institute of Environment and Ecology School of Emergency ManagementJiangsu UniversityZhenjiang 212013China School of the Environment and Safety Engineering&Institute of Environment and Ecology Jiangsu UniversityZhenjiang 212013China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China Xuzhou Medical University Affiliated HospitalXuzhou 221004China

Phosphorus(P)is involved in various biochemical reactions in plant growth,so it is beneficial to plants growing in soils contaminated by metals,including cadmium(Cd).However,few studies have reported on the mechanistic roles of P in mitigating Cd toxicity to ryegrass root,and especially in alleviating the disruption of the mitochondrial function of living *** this study,the physiological and biochemical mechanisms associated with ryegrass growth under various Cd and P treatments were investigated using leaching and pot *** concentration of Cd in soil leachates showed a significantly positive relationship with redox potential(P<0.05),but negative relationship(P<0.05)with leachate pH values and dissolved organic carbon(DOC),indicating that exogenous P addition(as H_(2)PO_(4)*)may decrease Cd leaching from contaminated *** to the control(without P addition),the cumulative Cd content was reduced by 53.3%and 64.5%in the soil leachate with exogenous P application(20 mg/L and 80 mg/L),***,application of P decreased the Cd concentrations in the symplastic fractions and increased the Cd concentrations in the apoplastic fractions in root tips,which may help to alleviate Cd stress to the ***,exogenous P was found to play a positive role in mitochondrial function and Ca^(2+)variation in root cells under Cd stress,which provides novel insights into the mechanisms of exogenous P in alleviating plant Cd injury.

关键词： Phosphorus Cadmium stress Protoplast Biogeochemical behavior Mitochondrial function

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Progress of plasma density fluctuation measurements with phase contrast imaging on HL-2A tokamak

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Plasma Science and Technology 2019年第8期21卷 5-11页

作者： Shaobo GONG Yi YU MinXU Aiping SUN Tao LAN Lin NIE Rui KE Ting LONG Hao LIU, yifanwu Boda YUAN Huajie WANG Jinbang YUAN Zhongbing SHI Wulv ZHONG Shifeng MAO Minyou YE andXuru DUAN University of Science and Technology of China Hefei230026People’s Republic of China Southwestern Institute of Physics Chengdu610041People’s Republic of China

A CO2 laser-based phase contrast imaging(PCI) diagnostic has been developed on HL-2A *** can detect line integrated plasma density fluctuations by measuring the phase shift of laser beam after being scattered by the bulk *** diagnosed radial region ranges from ρ≡r/a =0.625 to 0.7.32-channel HgCdTe detectors with alternative-current biased amplifiers are arranged in line at the imaging plane of the optical *** PCI is able to diagnose density fluctuations with wavenumbers ranging from 2 to 15 cm-1 and the time resolution is better than 2 μ*** first experimental data were achieved in 2018 spring campaign of HL-2A *** performance is confirmed in different discharging configurations and makes it a keen tool in broadband turbulence investigations.

关键词： phase contrast imaging phase shift density fluctuation turbulence

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