scholarly journals Heavy metal accumulation and its spatial distribution in agricultural soils: evidence from Hunan province, China

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10665-10672 ◽  
Author(s):  
Xuezhen Li ◽  
Zhongqiu Zhao ◽  
Ye Yuan ◽  
Xiang Wang ◽  
Xueyan Li

Literature related to heavy metal soil pollution in Hunan province was reviewed and a spatial auto-correlation method applied to reveal the spatial distribution of heavy metal accumulation. The heavy metal content was highest in eastern Hunan.

2014 ◽  
Vol 641-642 ◽  
pp. 1176-1182
Author(s):  
Gui Xiang Li ◽  
Jin Ping Shao ◽  
Xiang Jing Fang ◽  
Jing Jing Ma ◽  
Li Ping He ◽  
...  

Based on determination of heavy metal contents in soils and plants, understanding pollution of heavy metal in soils and plants, as well as the heavy metal accumulation in plants, in order to provide scientific basis for phytoremediation of heavy metals in mining areas. The determination and analysis on the concent of Zn, Cu, Pb, Cd, Mn was made in Niuba and southern mining area in Gejiu City. The result showed that the soil pollution from Cd is the most serious while the pollution from Zn was relative to minimum in Niuba abandoned mining area. In southern mining area, Pb in soil pollution was the most serious while Cu was relative to minimum Analysis on correlation between the heavy metal content in plants and soils was made based on the 5 plant samples (Pyracantha fortuneana, Zea mays, Acroptilon repens, Equisetum ramosissimum and Cucurbita moschata) collected from Niuba reclamation area and 5 plant samples (Corylus yunnanensis, Alnus nepalensis, Pyracantha fortuneana,Cupressus torulosa,Acacia dealbata) from recovery area of southern mining area. The results show that Pyracantha fortuneana has a better correlation with soil than other plants, Cucurbita moschata and soil have poor correlation, Corylus yunnanensis has better correlation with soil compared to other plants, Acacia dealbata has poor correlation with soil.


2009 ◽  
Vol 6 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Abida Begum ◽  
M. Ramaiah ◽  
Harikrishna ◽  
Irfanulla Khan ◽  
K. Veena

Assessment of heavy metal content in litchens and soil samples from various localities of Hosur Road, Bangalore south was undertaken. Topsoil samples (0-10 cm) were taken at various locations, the metals analysed were Cr, Pb, Fe, Zn, Ni and Cu. The geoaccumulation index of these metals in the soils under study residential areas indicated that they are uncontaminated with Ni, Zn, and Fe and moderately contaminated with Cr and Pb. In Industrial areas and traffic junctions the concentration of Fe, Pb and Ni was maximum. Heavy metal accumulation in few prominent lichens of some localities was analysed. Cr and Pb were maximum inChrysothrix candelaris(L.) Laundon, at the gardens of Madiwala and Silk Board junction with 95.29 and 623.95 µg g–1dry weight respectively. Fe and Cu were maximum inBulbothrix isidiza(Nyl.). Hale andPyxine petricolaNyl at Central Prison campus and Kendriya Sadan campus with 22721 and 338.12 µg g–1dry weight respectively,Lecanora perplexaBrodo at Infosis and Wipro Campus, electronic city have 531.5 and 634 µg g–1dry weight of Zn. While Ni and Fe were maximum in Arthopyreniaceae at Shanti Niketan of MICO Limited with 1100 and 23200 µg g–1dry weight respectively.


2012 ◽  
Vol 7 (2) ◽  
pp. 307-317 ◽  
Author(s):  
Dubravka Milić ◽  
Jadranka Luković ◽  
Jordana Ninkov ◽  
Tijana Zeremski-Škorić ◽  
Lana Zorić ◽  
...  

AbstractWe investigated the concentration of Aluminium (Al), Cobalt (Co), Chromium (Cr), Copper (Cu), Iron (Fe), Manganese (Mn), Nickel (Ni) and Zinc (Zn) in the root and aboveground organs of four halophyte species (Salicornia europaea, Suaeda maritima, Salsola soda and Halimione portulacoides), as well as in the soil from maritime and inland saline areas. The aim of our research was to evaluate the capability of some halophyte species to absorb different heavy metals and to detect differentiation of heavy metal accumulation within populations from inland and maritime saline areas. Generally, the plant roots had significantly higher concentrations of metals when compared to stems and leaves. Zinc was the only metal with concentrations significantly higher in the leaves than in the root and stem. Populations from maritime saline areas had higher trace root and stem metal concentrations than populations from inland saline areas. Excepting zinc, populations from inland saline areas had higher heavy metal concentrations in the leaves. The factors that affected metal accumulation by halophytes included the percentage of salt in the soil. We also discuss the potential use of these halophytes in phytoremediation.


Author(s):  
Г. Вяйзенен ◽  
В. Маринец ◽  
Р. Маринец ◽  
А. Вяйзенен ◽  
А. Барашков ◽  
...  

Проведены научнохозяйственный и физиологический опыты на молочных коровах чёрнопёстрой породы на ферме агротехнического техникума Новгородский в Новгородской области. Группы коров сформированы методом группаналогов с учётом возраста, живой массы, продуктивности за предыдущую лактацию свыше 6 тыс. кг молока, происхождения, породности и сроков осеменения. Количество коров по 10 голов в каждой группе. Цель исследования повышение полноценности и качества кормления коров на 8 9м месяце стельности. В задачи входило изучение влияния используемых фитопротекторов в рационе коров на снижение степени загрязнённости молока и организма тяжёлыми металлами. Опыт состоял из подготовительного (10 дней) и учётного (60 дней) периодов. Физиологический опыт проведён на фоне научнохозяйственного опыта продолжительностью 10 дней. Применение сушёных овощных культур (свёклы столовой и моркови кормовой) и экстракта хвойного натурального в рационах коров в 8 9 месяцев стельности обусловило снижение концентрации тяжёлых и токсичных металлов в молоке высокопродуктивных коров чёрнопёстрой породы с годовой продуктивностью 6000 кг в условиях антропогенного загрязнения окружающей среды. Тип кормления силосносенной. На фоне основного рациона (ОР) животным опытных групп скармливали дополнительно по 30, 50 и 80 г на голову в сутки свёклы и аналогичное количество моркови (кормовой). Экстракт хвойный натуральный (жидкий) в дозе 5,0 мл/гол скармливали в смеси с комбикормом. Свёкла столовая, морковь и экстракт хвойный натуральный (жидкий) с высокими антиоксидантными и сорбционными свойствами в смеси с комбикормом рационов дополняли организм коров комплексной смесью витамина С, витаминов группы В, витамина Е, селена, пряноароматических растений, позволяли более успешно решать проблемы, связанные с обменом веществ, накоплением тяжёлых металлов в молоке животных при круглогодовом стойловом способе содержания. Изучаемые фитогенные кормовые добавки обусловили повышение переваримости питательных веществ рационов, существенное снижение накопления в организме Zn, Cu, Pb, Cd, As, Hg, Fe2. Experiments on blackandwhite cows took place on the farm of the college Novgorodskiy. Analoguegroups were formed according to cow age, weight, milk productivity of over 6 thousand kg, origin, breed and mating time. Each group contained 10 heads. The aim was to improve forage composition and quality for the 8 9th month of cow gestation. One of the objectives was to study the influence of feed additives on heavy metal content in milk and cow organisms. The experiment had preliminary (10 days) and testing periods (60 days). Physiological tests lasted 10 days. Dried beet and carrot as well as coniferous extract reduced heavy and toxic metal concentration in milk. The diet included silage and hay. Cows consumed additionally 30, 50 and 80 g/head of beet and carrot daily. Coniferous extract (5.0 ml/head) was mixed with feedstuff. The additives had good antioxidant and sorption properties and provided livestock with vitamin C, B, E, and selenium. They improved cow metabolism and decreased heavy metal accumulation when keeping the livestock indoor for the entire year. The feed additives increased nutrient digestibility and reduced the accumulation of Zn, Cu, Pb, Cd, As, Hg, Fe2 in cow organisms.


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