Roles of adding biochar and montmorillonite alone on reducing the bioavailability of heavy metals during chicken manure composting

2019 ◽  
Vol 294 ◽  
pp. 122199 ◽  
Author(s):  
Jingkun Hao ◽  
Zimin Wei ◽  
Dan Wei ◽  
Taha Ahmed Mohamed ◽  
Huimin Yu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chicken Manure

scholarly journals Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andong Wang ◽  
Dongsheng Zou ◽  
Xinyi Zeng ◽  
Bin Chen ◽  
Xiaochen Zheng ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Heavy Metal ◽  
Environmental Risk ◽  
Metal Toxicity ◽  
Pyrolysis Temperature ◽  
Swine Manure ◽  
Chicken Manure ◽  
Toxicity Characteristic Leaching Procedure ◽  
Leaching Procedure

AbstractThis study was conducted to investigate the speciation, bioavailability and environmental risk of heavy metals (HMs) in chicken manure (CM) and water-washed swine manure (WSM) and their biochars produced at different pyrolysis temperatures (200 to 800 °C). As the pyrolysis temperature increased, the remaining proportion, toxicity characteristic leaching procedure (TCLP), HCl and diethylenetriamine pentaacetic acid (DTPA) of HMs gradually declined. This result proved that the speciation of HMs in chicken manure biochars (CMB) and water-washed swine manure biochars (WSMB) was influenced by pyrolysis temperature. The proportions of stable fractions were enhanced with increased pyrolysis temperature and weakened the HM validity for vegetation at 800 °C. Finally, the results of the risk assessment showed that the environmental risk of HMs in CMB and WSMB decreased with increasing pyrolysis temperature. Therefore, pyrolysis at 800 °C can provide a practical approach to lessen the initial and underlying heavy metal toxicity of CMB and WSMB to the environment.

scholarly journals The effect of organic fertilizers on the physico-chemical and agrochemical properties of sod-podzolic soils

2021 ◽  
Vol 5 (47) ◽  
pp. 21-21
Author(s):  
Vladimir Sedykh ◽  
Vitaliy Savich ◽  
Oleg Efimov ◽  
Vasily Rashkovich
Keyword(s):  
Heavy Metals ◽  
Podzolic Soil ◽  
Humus Content ◽  
Organic Fertilizers ◽  
Chicken Manure ◽  
Podzolic Soils ◽  
Physico Chemical ◽  
Mobile Forms ◽  
Agrochemical Properties ◽  
Chemical Soil

Studies of the effect of litter chicken manure applied in doses of 500-1000 t/ha showed a significant increase in the humus content in soils up to 2.8-5.2%, led to an increase in the content of thermophilic microflora in soils up to 12 · 105 CFU/ g, to an increase in the content of mobile phosphates up to 1200 mg/kg. However, the content of mobile forms of heavy metals (Pb, Zn, Cu, Ni) also increased. The increase in humus content in soils positively correlated with the content of mobile phosphates (r up to 0.5). Keywords: SOD-PODZOLIC SOIL, FERTILIZERS, CHICKEN MANURE, AGROCHEMICAL AND PHYSICO-CHEMICAL SOIL PROPERTIES

scholarly journals Increasing soil fertility as an important factor in ensuring food security of the state

2021 ◽  
Vol 273 ◽  
pp. 05010
Author(s):  
Galina Pyrchenkova ◽  
Vladimir Sedikh ◽  
Elena Radchenko
Keyword(s):  
Heavy Metals ◽  
Humus Content ◽  
Water Soluble ◽  
Chicken Manure ◽  
Hydrothermal Conditions ◽  
Podzolic Soils ◽  
Manure Compost ◽  
Complexing Capacity ◽  
Mobile Forms ◽  
Poultry Droppings

The influence of chicken manure compost with sawdust in doses from 100 to 1000 t/ha on soil properties was studied on the sod-podzolic soils where the poultry farms of the Moscow region are located. An increase in pH, the humus content, the content of water-soluble forms of NPK in soils and an increase in the complexing capacity of soils were found. The authors define the correlation of the content of mobile forms of heavy metals in the sod-podzolic soils fertilized with poultry droppings with soil pH, the content of humus and mobile phosphates in them. The permissible doses of manure introduced into the soil as fertilizer are determined by the combination of properties, processes and soil regimes, relief, groundwater level, and hydrothermal conditions of the territory. The introduction of droppings into soils contaminated with heavy metals increased their mobility due to complex formation. A positive effect of the use of humates from chicken droppings on the bioproductivity of plants is defined. The article considers the necessity of controlling the quality of the water and air environment when regulating the composition and doses of application of chicken manure compost.

scholarly journals Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops

Heliyon ◽  
2017 ◽  
Vol 3 (12) ◽  
pp. e00493 ◽  
Author(s):  
Balasubramani Ravindran ◽  
Hupenyu A. Mupambwa ◽  
Sibongiseni Silwana ◽  
Pearson N.S. Mnkeni
Keyword(s):  
Heavy Metals ◽  
Chicken Manure ◽  
Vegetable Crops ◽  
Nutrient Quality
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