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Integrated Fertilization Regimes Boost Heavy Metals Accumulation and Biomass of Sedum alfredii Hance

Phyton-International Journal of Experimental Botany 2021年第4期90卷 1217-1232页

作者： Kangning Zhou Yingying Zhang Jiasen Wu Chunying Dou Zihao ye zhengqian ye Weijun Fu State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityLin’an311300China Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province School of Environmental Sciences and ResourcesZhejiang A&F UniversityLin’an311300China Plantation Bureau of Ningguo County Ningguo242300China

The hyperaccumulator Sedum alfredii Hance(***)may be employed for zinc(Zn)and cadmium(Cd)-polluted soil ***,the low phytoremediation efficiency,related to the low biomass production,limits its use with that *** this experiment,nitrogen(N),phosphorus(P),and potassium(K)fertilizers,and organic manure were applied to investigate the phytoremediation ability of *** and pot experiments were conducted using Zn-Cd polluted *** hydroponic experiment indicated that appropriate fertilizer application could increase(p0.8 mmol L^(−1))P supply decreased growth,and Zn/Cd accumulation in whole plants of the studied *** 0.1 mmol L^(−1) P was an optimal dosage for *** biomass production and Zn/Cd accumulation in *** supply levels within the range from 0.3 to 1 mmol L^(−1) K could significantly improve the biomass production of *** and its capability to accumulate Zn and Cd in the *** 0.5 mmol L^(−1) K was an optimal dosage for the whole biomass production and Zn accumulation in shoots,while the 1 mmol L^(−1) was an optimal K dosage for Zn accumulation in shoots,which was 17.2%higher than the ***,the soil pot experiment showed that the combination of organic(fermented manure)and inorganic fertilizers made significant effects on the Zn and Cd-polluted soil remediation by *** effects varied,however,with the application of different proportions of N,P,K and organic *** Zn accumulation by *** reached the highest efficiency ability under the highest fertilizer

关键词： Sedum alfredii Hance zinc cadmium phytoremediation fertilizer application

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Effects of Biochar Inoculation with Bacillus megaterium on Rice Soil Phosphorus Fraction Transformation and Bacterial Community Dynamics

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Rice science 2024年第4期31卷 361-365,I0001-I0003页

作者： YU Keru XUE Zhaokun FANG Xianzhi MA Jiawei WANG Yongjun LIU Dan ye zhengqian State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province Zhejiang A&F UniversityHangzhou 311300China Department of Forest Protection College of Forestry and BiotechnologyZhejiang A&F UniversityHangzhou 311300China

Rice husk biochar inoculated with Bacillus megaterium(BM)(referred to as BM-inoculated biochar, BMB) and uninoculated rice husk biochar(RHB) were added to soil at two rates(0.5%, as BMB1 and RHB1, respectively, and 1.0%, as BMB2 and RHB2, respectively) in an incubation experiment to comprehensively evaluate their effects on basic soil properties, phosphorus(P) fractions, bacterial community composition, and P-cycling genes.

关键词： soil comprehensive Transformation

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Organic Materials Could Improve the Phytoremediation Efficiency of Soil Potentially Hazardous Metal by Sedum alfredii Hance

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Phyton-International Journal of Experimental Botany 2022年第7期91卷 1529-1542页

作者： Peifan Wang Shengting Rao Jia Fang Yongqiang Lv Anying Zhao zhengqian ye Weijun Fu State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou311300China Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province Zhejiang A&F UniversityHangzhou311300China

Soil potentially hazardous metal(PHM)is continually attracting public attention worldwide,due to its highly toxic properties and potentially huge damage to human being through food *** is an effective and eco-friendly way in remediation technology.A pot experiment was carried out to investigate the effect of different organic materials(biogas residue(BR),mushroom residue(MR),and bamboo-shoot shell(BS))application on phytoremediation of two PHM-contaminated soils(Fuyang soil as‘heavily-polluted soil’and Wenzhou soil as‘moderately-polluted soil’,respectively)by Sedum alfrecdii *** results indicated:1)for moderately-polluted soil,the 5%BR treatment had the strongest activation to Cu and Zn,for heavily-polluted soil,1%BS treatment had the highest activation effect for Cu,Zn,Pb and Cd.2)the above-ground biomass of Sedum alfredii Hance increased with the addition rate of organic materials.3)for Cd uptake of Sedum alfredii Hance in moderately-polluted soil,only 1%BS treatment had a better accumulation effect,compared to the control,for Zn element,MR treatments were weaker than the control,while other treatments were better than the control,of which 5%BR,1%BS and 5%BS accumulated more Zn element by 39.6%,32.6%and 23.8%,respectively;in heavily-polluted soil,the treatments of 5%BS,1%BR and 5%BR accumulated more Cd than the control by 12.9%,12.8%and 6.2%,respectively,the treatments with organic materials addition promoted Zn accumulation in shoots of Sedum alfredii Hance,and the best treatment was 5%***,an appropriate application rate of BS and BR could improve the remediation efficiency for Zn/Cd contaminated soils by Sedum alfredii Hance.

关键词： Organic material Sedum alfredii Hance potentially hazardous metal polluted soil phytoremediation efficiency

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Soil Contamination with Heavy Metals and Its Impact on Food Security in China

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Journal of Geoscience and Environment Protection 2019年第5期7卷 168-183页

作者： Zhongchen Hu Jianwu Li Hailong Wang zhengqian ye Xudong Wang Yongfu Li Dan Liu Zhaoliang Song Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Zhejiang A&F University Hangzhou China School of Environmental and Chemical Engineering Foshan University Foshan China Institute of the Surface-Earth System Science Research Tianjin University Tianjin China

With the rapid economic expansion, environmental degradation has become increasingly sever during the past three decades. Soil pollutions associated with toxic organic compounds and heavy metals have been identified in China. The accumulation of heavy metals in soils and its impact on food safety is of increasing concern. It has been reported that more than 20 million ha of land have been contaminated with heavy metals that can result in the potential health risks to human beings and soil ecosystems. This can potentially jeopardize the food security in China. Accumulation of heavy metals in suburb and rural soils is closely related to many anthropogenic activities, such as application of fertilizers and pesticides, irrigation of wastewater, discharge of mining, improper disposal of metal containing wastes, land application of animal manures, sewage sludge and coal combustion residues. Arable crops and vegetables in suburb and rural can take up heavy metals from contaminated soils, which is one of the main pathways of introducing heavy metals to human food chain. Events related to soil and vegetable contamination, food safety and human health risks, e.g., rice and vegetables with elevated concentrations of cadmium, are often reported in the media in recent years. The Chinese government has recently developed a number of new policies for prevention of soils from further soil contamination, and remediation of contaminated soils. This presentation will provide a comprehensive review on heavy metal pollution in soils and its impacts on food security in China, and also summarize some new technologies for remediation of soils contaminated with heavy metals.

关键词： Soil Heavy Metals Food Security China

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Bioavailability of Cd and Zn in soils treated with biochars derived from tobacco stalk and dead pigs

Bioavailability of Cd and Zn in soils treated with biochars ...

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作者： Xing Yang Kouping Lu Kim McGrouther Lei Che Guotao Hu Qiuyue Wang Xingyuan Liu Leilei Shen Huagang Huang zhengqian ye Hailong Wang Yancao Production Technology Center Bijie Yancao Company of Guizhou Province Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province Zhejiang A & F University

Purpose Previous studies show that application of biochar can reduce the bioavailability of heavy metals in soil. A plant growth experiment was carried out to evaluate the effect of tobacco stalk- and dead pig- derived biochars on the extractability and redistribution of cadmium(Cd) and zinc(Zn) in contaminated soil, and the impact on tobacco(Nicotiana tabacum L.) plant growth. Materials and methods The top 20 cm of a soil contaminated with Cd and Zn was used in this study. Biochars derived from tobacco stalk and dead pig were applied to the soil at four application rates(0, 1%, 2.5% and 5%) and tobacco plants were grown. After 80-days growth, the p H, electrical conductivity, CaCl-extractable heavy metals and fractions of heavy metals in soil samples, as well as the plant biomass and the concentrations of heavy metals in the plant were determined. Results and discussion The plant growth experiment demonstrated that tobacco stalk biochar and dead pig biochar significantly(P< 0.05) increased the p H, but had no significant effect on the electrical conductivity of the soil. The CaCl-extractable Cd and Zn content decreased as the application rates increased. The concentration of extractable Cd and Zn decreased by 64.2% and 94.9%, respectively, for the tobacco stalk biochar treatment, and 45.8% and 61.8%, respectively, for the dead pig biochar treatment at 5% application rate. After biochar addition, the exchangeable Cd was mainly transformed to fractions bound to carbonates and Fe-Mn oxides, while the Zn was immobilized mainly in the fraction bound to Fe-Mn oxides. Tobacco stalk biochar increased the tobacco plant biomass by 30.3% and 36.2% for shoot and root, respectively at the 5% application rate. Dead pig biochar increased the tobacco plant biomass by 43.5% and 40.9% for shoot and root, respectively at the 2.5% application rate. Both biochars significantly(P< 0.05) decreased the Cd and Zn accumulation by tobacco plant. Conclusions As a soil amendment, tobacco stalk

关键词： Bioavailability Biochar Immobilization Metal uptake Soil contamination

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浙西南典型耕地土壤重金属空间分布及污染评价

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浙江农林大学学报 2024年第2期41卷 396-405页

作者：王会来吴东涛叶正钱丽水市莲都区土肥能源发展中心浙江丽水323000 丽水市土肥植保能源总站浙江丽水323000 浙江农林大学浙江省土壤污染生物修复重点实验室浙江杭州311300

【目的】采集分析丽水市莲都区某乡土壤样品,了解全乡农田重金属污染情况,为后续开展土壤安全管理和污染综合治理提供科学依据。【方法】采用主成分分析法进行来源解析,运用单项污染指数法、内梅罗指数法、地积累指数法、潜在生态风险... 详细信息

【目的】采集分析丽水市莲都区某乡土壤样品,了解全乡农田重金属污染情况,为后续开展土壤安全管理和污染综合治理提供科学依据。【方法】采用主成分分析法进行来源解析,运用单项污染指数法、内梅罗指数法、地积累指数法、潜在生态风险指数法及生态风险预警指数进行土壤重金属污染评价。【结果】土壤镉(Cd)和铅(Pb)超标率(风险筛选值)分别为60.71%和39.29%,但均低于农用地土壤污染风险管控值。土壤Cd污染指数(Pi)为1.31,属于轻微污染,其余重金属小于1,无污染;内梅罗指数(P综合)为1.10,属于轻度污染。土壤Cd和Pb的地积累指数(Igeo)分别为1.74和0.79,属中度污染和无污染-中度污染;其余重金属均处于清洁水平。5种重金属的潜在生态危害系数(E i r)均值小于40,处于轻微水平风险;生态风险指数(IR)为48.87,属于轻微风险。土壤生态风险预警指数(IER)处于轻度预警级别。汞(Hg)和铬(Cr)受到人为和自然双重因素影响,Cd、Pb和砷(As)主要受矿山开发过程中污染物排放和畜禽粪便施用等人类活动影响。【结论】研究区土壤总体为轻微污染,Cd和Pb是研究区农田土壤最重要的生态环境因子,后续应加强治理和动态检测,保障农产品安全。

关键词：土壤重金属空间分析风险评价源解析

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The efficiency of heavy metals removal from contaminated water by Elsholtzia argyi and Elsholtzia splendens

The efficiency of heavy metals removal from contaminated wat...

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International Symposium on Phytoremediation and Ecosystem Health

作者： Ling Zhang,Shengke Tian,zhengqian ye,XiaoeYang,and Hongyun Peng MOE Key Lab of Environmental Remediation and Ecosystem Health,Zhejiang University,310029 Hangzhou,China

The potential of using *** and *** to remove copper from water was *** cultivated,the removal rate of Cu by both *** and E.

关键词： Elsholtzia argyi Elsholtzia splendens heavy metals contaminated water

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活化剂联合柳树对重金属Cd污染土壤的修复效果研究

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水土保持学报 2019年第3期33卷 365-371页

作者：倪幸李雅倩白珊叶正钱浙江农林大学环境与资源学院

为有效提高植物提取污染土壤重金属的效率,以绿色安全的有机物料为活化剂代替存在安全隐患、不可降解的螯合剂及表面活性剂,探究不同活化剂对土壤重金属镉的活化效果及对植物镉积累的影响。通过室内培养试验与盆栽试验的方法,研究了紫... 详细信息

为有效提高植物提取污染土壤重金属的效率,以绿色安全的有机物料为活化剂代替存在安全隐患、不可降解的螯合剂及表面活性剂,探究不同活化剂对土壤重金属镉的活化效果及对植物镉积累的影响。通过室内培养试验与盆栽试验的方法,研究了紫云英、黄腐酸钾和柠檬酸3种活化剂在0.3%施用量下对污染土壤中镉的生物有效性、赋存形态的影响及活化剂强化柳树对镉的积累。结果表明:(1)添加活化剂会改变土壤的pH。培养结束时,黄腐酸钾处理对土壤pH的降低效果优于紫云英处理,显著低于对照0.50个单位(p<0.05),而酸性较强柠檬酸处理的土壤pH显著高于对照0.26个单位(p<0.05);添加活化剂均可提高土壤有机质含量。培养结束时,黄腐酸钾处理对土壤有机质含量提升效果优于其他2种活化剂,显著高于对照2.97 g/kg(p<0.05)。(2)添加活化剂均可提高土壤有效态镉含量,但不同活化剂的活化效果不同。培养20天时,紫云英与黄腐酸钾处理的土壤有效Cd含量均达到最高,优于柠檬酸处理,分别高于对照0.38 mg/kg(p<0.05),0.17 mg/kg。培养10~30天时,柠檬酸处理的土壤有效Cd含量逐渐增加,至30天时,柠檬酸处理对土壤有效Cd含量提升效果优于其他活化剂,显著高于对照处理0.39 mg/kg(p<0.05)。(3)添加活化剂影响了土壤镉形态分布,培养10~30天,3种活化剂可活化土壤残渣态Cd,提高酸可提取态Cd所占百分比。(4)3种活化剂处理对柳树的株高、生物量无显著影响,但均提高了根系的形态参数,其中柠檬酸处理的根系长度、表面积、根系体积均显著高于对照,分别提高了75.54%,80.05%,82.93%(p<0.05)。活化剂中黄腐酸钾处理明显提高了柳树叶片、枝条、根系镉含量,分别高于对照133.44%(p<0.05),75.21%,264.64%(p<0.05),并大大提高了柳树对土壤镉的富集与净化。以有机物料为活化剂,可有效提高土壤重金属生物有效性,提高植物对土壤镉的吸收,具有良好的应用前景。

关键词：活化剂镉生物有效性

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有机肥料对土壤锌、锰有效性的影响

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土壤学报 1990年第2期27卷 195-201页

作者：杨玉爱何念祖叶正钱浙江农业大学

本文研究了厩肥、猪、牛、羊、鸡、鸭、兔、蚕粪等8种有机肥料的锌、锰总量及不同形态的含量,同时还研究了有机肥料及土壤中酶的活性,试验证明有机肥料是提供作物锌、锰营养的良好肥源,施用有机肥料可提高土壤锌、锰的有效性,但对土壤... 详细信息

本文研究了厩肥、猪、牛、羊、鸡、鸭、兔、蚕粪等8种有机肥料的锌、锰总量及不同形态的含量,同时还研究了有机肥料及土壤中酶的活性,试验证明有机肥料是提供作物锌、锰营养的良好肥源,施用有机肥料可提高土壤锌、锰的有效性,但对土壤中锌、锰的有效化的影响和作用不同,有机肥供锰速度慢,强度小,伹在土壤中的残效长;而供锌强度大,速度快。有机肥与无机化肥配合施用,种植麦、稻两季作物后,在第三季的晚稻土壤中锌出现严重的亏缺。

关键词：有机肥料土壤锌锰

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高分辨率小动物Micro Insert PET系统的模拟研究

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核技术 2014年第11期37卷 23-28页

作者：尹永智李梅春王慧鹏姚丽萍叶征乾兰州大学核科学与技术学院兰州730000

在西门子Micro PET小动物成像系统中接入高分辨率的Insert探测器环,组成了Micro Insert PET系统,可以进一步提高小动物PET系统的图像分辨率。本文采用蒙特卡罗模拟软件GATE定义Focus-220小动物PET和Micro Insert两种系统,在同步仿真运算... 详细信息

在西门子Micro PET小动物成像系统中接入高分辨率的Insert探测器环,组成了Micro Insert PET系统,可以进一步提高小动物PET系统的图像分辨率。本文采用蒙特卡罗模拟软件GATE定义Focus-220小动物PET和Micro Insert两种系统,在同步仿真运算中,给出了三种类型的符合数据,即PET Scanner和PET Scanner之间的符合、PET Scanner和Insert之间的符合、Insert和Insert之间的符合。用滤波反投影算法重建了Na-22单点源模型、多点源模型、LZU模型的PET图像。其中,多点源模型的径向图像分辨率的仿真结果与美国华盛顿大学的Micro Insert实验数据,在忽略正电子射程、非线性效应项以及噪声等的贡献下,两者符合得很好。研究表明,使用Micro Insert系统能够将小动物PET系统的图像分辨率提高到亚毫米水平。

关键词：蒙特卡罗仿真小动物PET Micro Insert系统图像重建

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