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Remediation of Arsenic Toxicity in the soil-plant System by Using Zinc Fertilizers

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Journal of Agricultural Chemistry and Environment 2017年第1期6卷 30-37页

作者： Ishrat Jahan Sanchary Shah Muhammad Imamul Huq Department of soil and Environmental Sciences University of Barisal Barisal Bangladesh Department of soil Water and Environment University of Dhaka Dhaka Bangladesh

Availability of soil arsenic (As) and plant As at various levels of zinc (Zn) and As applications were examined. A pot-culture experiment with a leafy vegetable, Kalmi (Ipomoea aquatica), on an Inceptisols, was conducted where As was applied with irrigation water at the rates of 0 mg/L (As control), 0.5 mg/L, 1 mg/L and 2 mg/L and Zn was added to the soil as ZnCl2 solution at the rate of 0 mg/L (Zn control), 1 mg/L, 2 mg/L and 3 mg/L during pot preparation. The experiment was conducted in triplicates for 45 days till the plants were grown to maturity. At the end of the experiment the remedial effect of Zn on As toxicity was examined and as such, yield parameters, As and Zn accumulation in Kalmi plants, residual concentrations of As and Zn in soils and plants were measured. It appeared from the present study that there exists an antagonistic relationship between Zn and As i.e., Zn in soils was found to reduce As availability in soils as well as its accumulation in plants, particularly at an elevated application rate of 3 mg/L Zn. The findings could be used as a strategy to mitigate arsenic toxicity in As contaminated soils.

关键词： Remediation Arsenic soil-plant System

Ecohydrological change mechanism of a rainfed revegetation ecosystem at southeastern edge of Tengger desert,Northwest China

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Science China Earth Sciences 2004年第Z1期47卷 71-77页

作者： XIAO Honglang CHENG Guodong LI Xinrong SONG Yaoxuan WANG Xinping Shapotou Desert Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Shapotou Desert Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Shapotou Desert Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Shapotou Desert Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Shapotou Desert Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

Study is made on a 45 km-long artificial ecosystem without irrigation in Tengger desert on the basis of long-term ecological monitoring and ecohydrological *** in water allocation, utilization, cycle and balance patterns in more than 40-year evolution of the soil-plant system are analyzed. The formation of a drought horizon in shrub rhizosphere and its effect, ecohydrological function of the crust and its effect on the soil-plant system change are discussed. Driven by water self-regulation and water stress, the soil-plant system is going to develop towards the steppe desert to ensure more effective use and optimum collocation of water resource.

关键词： ecohydrology, artificial ecosystem, soil-plant evolution, water balance, drought horizon, bio-crust, Chinese desert.

Transfer Factor of Heavy Metals due to Mining Activities in Some Parts of Plateau State,Nigeria(Health Implications on the Inhabitants)

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Journal of Oncology Research 2022年第2期4卷 13-26页

作者： J.Waida U.Ibrahim N.G.Goki S.D.Yusuf U.Rilwan Department of Physics Borno State UniversityMaiduguriBorno StateNigeria Department of Physics Nasarawa State UniversityKeffiNasarawa StateNigeria Department of Geology and Mining Nasarawa State UniversityKeffiNasarawa StateNigeria Department of Physics Nigerian Army UniversityBiuBorno StateNigeria

Accumulation of heavy metals in agricultural soils is instigated by industrial and other human activities such as mining,smelting,cement-pollution,energy and fuel production,power transmission,traffic activities,intensive agriculture,sludge dumping and melting *** received heavy metals from soils through ionic exchange,redox reactions,precipitation-dissolution,and so on,which implies that the solubility of trace elements based on factors like minerals in the soil(carbonates,oxide,hydroxide etc.),soil organic matter(humic acids,fulvic acids,polysaccharides and organic acids),soil pH,redox potential,content,nutrient balance,other trace elements concentration in soil,physical and mechanical characteristics of soil,soil temperature and humidity,and so *** this study,the soil-edible plant and soil-water Transfer Factor(TF)for various metals showed that the TF values differed slightly between the *** soil-edible plant transfer,the mean TF for different heavy metals in soil-edible plants decreased in the following order:As(0.6)mg/kg>Cd(0.1)mg/kg>Cr(0.06)mg/kg>Pb(0.003)mg/kg>Ni(0.001)mg/*** total TF for different locations decreases in the following order:Barkin Ladi(1.0)mg/kg>Jos South and Jos East(0.7)mg/kg>Bassa and Mangu(0.6)mg/*** soil-water transfer,the mean TF for different heavy metals in soil-edible plants decreased in the following order:Cd(0.001)mg/L>As(0.0007)mg/L>Cr(0.0005)mg/L>Pb(0.0001)mg/L and Ni(0.0001)mg/*** total TF for different locations decreases in the following order:Jos South(0.003)mg/kg>Barkin Ladi,Bassa,Jos East and Mangu(0.002)mg/*** on the findings of this study,it can be concluded that the water and edible plants in the study area are good for public consumption,even though,regular checking of heavy metals in the study area is recommended.

关键词： Heavy metals soil-plant soil-Water Transfer Factor Water soil Edible plan

Effect of a High Silver Stress on the Element Transfers from a Smectite-Type Clay Substrate to plants

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Green and Sustainable Chemistry 2012年第2期2卷 76-89页

作者： Khadija Semhi Norbert Clauer Sam Chaudhuri René Boutin Mohamed Hassan Department of Geology Kansas State University Manhattan USA Laboratoire d’Hydrologie et de Géochimie de Strasbourg (CNRS-UdS) Strasbourg France Sultan Qaboos University Muscat Oman

Two species of radishes, Raphanus sativus and Raphanus raphanistrum, were grown in the laboratory in the same substrate consisting of a smectite-type clay, which was watered at the beginning of the experience with 50 ml of a solution containing either none or 1000, 2000 or 4000 mg/L of AgNO3, respectively. Occurrence of the toxic metal in the substrate outlines higher element uptakes by the cultivated species Raphanus sativus than by the wild species Raphanus raphanistrum, except for the highest degree of Ag pollution. After a one-month growth in the Ag-polluted substrate, Raphanus sativus was depleted in most of the major, trace and rare-earth elements, except for Al, Fe, Th, Ag and U that increased in the radishes from substrate polluted by 2000 mg/L of AgNO3, and Sr, Co, Ni, U and Ag that increased in the radishes from substrate polluted by 4000 mg/L of AgNO3. Raphanus raphanistrum was enriched in all elements except Si, Na, Rb and K in the polluted substrate. The uptake was monitored by a cation-exchange process in the rhy-zosphere between mineral particles and the watering solution in the presence of various enzymes with specific activities that induced a variable uptake with the REEs being even fractionated. These activities most probably depend on combined factors, such as the plant species, and the chemical and physical properties of the substrate. The results obtained here reveal also that accumulation of nutrient elements and others in the plants is not uniform at a given Ag pollution of the substrate and therefore at a given Ag contamination in the same plant species.

关键词： Ag Pollution plant-Growth Experiment Smectite-Type Clay Substrate soil-plant Element Transfers REE Fractionation

The Transfer of Cu, Zn, Mn and Fe between soils and <i>Allium</i>plants (Garlic and Onion), and Tomato in the Southwest of the Buenos Aires Province, Argentina

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American Journal of plant Sciences 2014年第4期5卷 480-487页

作者： María del Pilar Moralejo Silvia Graciela Acebal INQUISUR-Departamento de Química Universidad Nacional del Sur Bahía Blanca Argentina

Chemical extraction methods are generally used to evaluate trace element concentrations in soils. The adequacy of these soil tests is commonly assessed by comparing the extraction results with the metal contents in the plants. In this study, soil and leaf samples were collected in the southwest area of the Buenos Aires Province, Argentina. Garlic (Allium sativum L.), onion (Allium cepa L.) and tomato (Solanum lycopersicum L.) are species of great regional economic importance. These crops need good mineral nutrition for optimum growth and sustainable production. Cu, Zn, Mn and Fe micronutrient uptake by plants was analyzed together with the trace element contents in the soil in which those plants were grown. A single EDTA-extraction procedure was performed to determine soil micronutrients. The amount of extractable-trace elements increased as the concentration of the chelating agent EDTA increased. The range of total element content in soil was: 15.68-31.5 mg·kg-1 for Cu, 75.0-386.3 mg·kg-1 for Zn, 542.5 -1686 mg·kg-1 for Mn and 28,325-32,675 mg·kg-1 for Fe. Micronutrient contents in mature leaf tissue were determined by the acid digestion method. Total and available micronutrient content in soil as well as total content in leaves were measured by flame atomic absorption spectrometry (FAAS). Total micronutrient content and the available extractable-fraction in soils were below the critical values for plant growth. This was in agreement with the amount of micronutrients present in the leaf tissue. A strong relationship between the extraction data and the soil-plant transfer coefficients suggested an appropriate exchange of trace elements from soils to garlic, onion and tomato plants.

关键词： Micronutrients soil-plant Transfer Garlic (Allium sativum L.) Onion (Allium cepa L.) Tomato (Solanum lycopersicum L.) Extractions

Macro and Micro Nutrient Supply to soil and plants from Sugar Mill Mud

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Agricultural Sciences 2019年第2期10卷 164-172页

作者： Ishrat Jahan Sanchary Kazi Md. Jahangir Kabir Shah Muhammad Imamul Huq Department of soil and Environmental Sciences University of Barishal Barishal Bangladesh Department of soil Water and Environment University of Dhaka Dhaka Bangladesh Vice Chancellor University of Barishal Barishal Bangladesh

The effects of sugar mill mud application on the availability of nutrients for plant uptake were investigated. Mill mud generated from conventional sugar mill operations was applied in three different rates and a leafy vegetable, locally called “PuiShak” or Indian spinach (Basellarubra L.) was grown for 60 days as a test crop in a pot culture experiment. Crop yield and essential nutrients like N, P, K and Zn uptake concentration was determined to come up with an inference that higher doses of mill mud application impose better effect on root and shoot uptake of these elements. A little infraction was observed for nitrogen uptake by plants for the maximum dose.

关键词： Nutrient Supply soil-plant System Mill Mud