Study on Passivation of Wood Vinegar on Heavy Metals (Cu, Zn) During Cow Dung Compost Process

2020 ◽  
Vol 14 (1) ◽  
pp. 114-119 ◽  
Author(s):  
Ling Zhou ◽  
Hang Zhang ◽  
Zhiyu Li ◽  
Heng Wu ◽  
Wenxuan Zheng
Keyword(s):  
Heavy Metals ◽  
Cow Dung ◽  
Compost Process ◽  
Wood Vinegar

Exploring the Regulatory Role of Wood Vinegar on Heavy Metals (Copper, Zinc) Before and After Cow Dung Composting

2014 ◽  
Vol 13 (15) ◽  
pp. 2453-2460
Author(s):  
Zhiyu Li ◽  
Ling Zhou ◽  
Fei Liu ◽  
Xuening Luo ◽  
Jinlong Sun ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Regulatory Role ◽  
Cow Dung ◽  
Wood Vinegar ◽  
Before And After ◽  
Copper Zinc

Earthworm Processing of Livestock Manure and Accumulation of Heavy Metals

2012 ◽  
Vol 573-574 ◽  
pp. 1129-1133 ◽  
Author(s):  
Ji Cai Qiu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Waste ◽  
Cow Dung ◽  
Optimum Conditions ◽  
Metal Enrichment ◽  
Heavy Metal Elements ◽  
Enrichment Techniques ◽  
Animal Feces ◽  
Strong Ability

The earthworm is an omnivorous animal low saprophytic, has a strong ability to decompose organic waste. The earthworm can directly grows on dung, consume a large amount of organic waste, numerous research reports, earthworm on heavy metal elements have very strong enrichment. Therefore, the use of earthworms as a bioreactor for animal feces, excessive heavy metals to biological concentration, reduce the content of heavy metals in animal feces, is a task that is worth to discuss. Taking the rural animal feces in the largest number, the most widely distributed of cow dung as study objects, to carry out the earthworm absorption in cow dung, Zn Pb Cu, the study of the optimum conditions for the further study of Earthworm on cattle manure, heavy metal enrichment techniques provide a basis.

Speciation of heavy metals and bacteria in cow dung after vermicomposting by the earthworm, Eisenia fetida

2017 ◽  
Vol 245 ◽  
pp. 411-418 ◽  
Author(s):  
Yong Wang ◽  
Wei Han ◽  
Xiaoyun Wang ◽  
Hongmei Chen ◽  
Fen Zhu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Eisenia Fetida ◽  
Cow Dung

scholarly journals Evaluation of Levels of Cadmium, Chromium and Lead in Bio Fertilizer from Various Feed Stocks and in Inorganic Fertilizers Used in Kenya

2020 ◽  
pp. 38-42
Author(s):  
J. G. Kinaichu ◽  
C. G. Nyaga ◽  
P. Njogu ◽  
E. G. Gatebe
Keyword(s):  
Heavy Metals ◽  
Cow Dung ◽  
Local Market ◽  
Inorganic Fertilizers ◽  
Flame Atomic Absorption ◽  
Flame Atomic Absorption Spectrophotometer ◽  
Chicken Litter ◽  
Lead Metal ◽  
Set Up ◽  
Pig Wastes

This study was conducted to compare the levels of selected heavy metals (Pb, Cr and Cd) in inorganic fertilizers and bio slurry from different feed stocks. Bio slurry samples from chicken droppings, cow dung and pig wastes were analyzed for levels of selected heavy metals. Inorganic fertilizers for analysis DAP, CAN, Urea and NPK were procured from local market in Juja town next to Jomo Kenyatta University of Agriculture and Technology (JKUAT). Bio slurry samples were collected from Githunguri Sub County in Kiambu County and from mini digesters set up at JKUAT. Concentrations of Cd, Cr, and Pb were determined by Flame Atomic Absorption Spectrophotometer (Shimadzu 6200). Inorganic fertilizers were found to contain detectable amounts of lead metal. DAP had the highest amount of Pb at 0.03 mg/l followed by CAN (0.02 mg/l) Urea and NPK had 0.01 mg/l each. Bio slurry samples contained lower amounts of lead which was below detectable limit in chicken litter and pig wastes. Inorganic fertilizers contained Cd with the highest levels being in the phosphorous containing fertilizers DAP (0.41 mg/l) and NPK (0.48 mg/l). All samples contained Cr with the highest in bio slurry samples being 0.09 mg/l in cow dung collected from Githunguri. CAN had the highest level of Cr (0.08 mg/l) among the inorganic fertilizers. Bio slurry is a better alternative fertilizer in reducing heavy metal uptake and their subsequent bioaccumulation.

scholarly journals REMEDIAL MEASURES FOR IMMOBOLIZATION OF HEAVY METALS FROM CONTAMINATED SOIL

2014 ◽  
Vol 19 ◽  
pp. 49-56
Author(s):  
Baby Sharma ◽  
Mukesh Kumar Chettri
Keyword(s):  
Heavy Metals ◽  
Contaminated Soil ◽  
Morphological Changes ◽  
Dry Weight ◽  
Lepidium Sativum ◽  
Cow Dung ◽  
Remedial Measures ◽  
Lime Treatment ◽  
Mixed Metal ◽  
Metal Treatment

To understand the remedial measures of heavy metals from contaminated soil, three vegetable (Brassica juncea, Brassica rapa and Lepidium sativum) were grown on soil artificially contaminated with 300 mg kg-1 CuCl2, 500 mg kg-1 Pb(NO3)2, 800 mg kg-1 ZnCl2 or their mixed metal (1600 mg kg-1). This experiment showed that Cu and Pb accumulation in vegetables are higher in lime treatments than in 20% cowdung treatments. Zinc accumulation increased in B. rapa and L. sativum in both cow dung and lime treatments compared to control. Accumulation of Cu, Pb and Zn from mixed metal treatment was highest in L. sativum (at lime 9 g kg-1 for Cu and Pb, and 20% cow dung for Zn). Morphological changes such as fresh weight, dry weight, shoot length, root length, mostly increased significantly (P≤0.01) with Zn and cow dung treatment, but none with lime treatment. Fresh and dry weight increased only in L. sativum grown in 3 g kg-1 lime treatment. Immobilization of Cu, Pb and Zn in both single and mixed treatments was found to be high in cow dung amended soil. From this it can be ascertained that 20% cow dung treatment is suitable for immobilization of supplied heavy metals than lime treatments. DOI: http://dx.doi.org/10.3126/eco.v19i0.9853EcoprintAn International Journal of EcologyVol. 19, 2012Page: 1-5Uploaded date: 2/14/2014

scholarly journals Comparative effect of Organic Amendments on Heavy Metals Adsorption in Soils and their Chemical properties

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
O. I. Nwachukwu ◽  
D. M. Olim ◽  
S. M. Afu ◽  
E. A. Akpa ◽  
P. I. Adie
Keyword(s):  
Heavy Metals ◽  
Poultry Manure ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Soil Samples ◽  
Cow Dung ◽  
Comparative Effect ◽  
Standard Procedures ◽  
Edta Solution ◽  
Before And After

Incubation experiment was carried out to evaluate and compare effects of some selected amendments on adsorption of heavy metals in soils and their chemical properties. The experiment was CRD consisting of twelve treatment combinations with three replications. Soil samples were collected from the vicinity of Michael Okpara University of Agriculture and amended with organic amendments at the rate 20 ton/ha and heavy metals at the rate of 60 mg/kg, thoroughly mixed and wetted daily throughout the incubation period of 30 days. 0.05M EDTA solution was used to extract heavy metals. EDTA solution was filtered from soil with Whatman No1 filter paper. The soil was analyzed for chemical properties before and after experiment using standard procedures. Higher amount of heavy metals was extracted from the control soils than the amended soils indicating retention of heavy metals by the amendments. All the amendments were significantly (P<0.05) different in adsorption of copper with poultry manure having significantly (P<0.05) the highest adsorption capacity while the control had the least. Cocoa pod was significantly (P<0.05) higher on adsorption of lead with cow dung and poultry manure not being significantly (P>0.05) different from each other. Cow dung had the highest (P<0.05) on adsorption of zinc. Heavy metals combined with amendments had significant (P<0.05) effect on soil chemical properties. Most chemical properties were significantly (P<0.05) higher in soils treated with both amendments and heavy metals than soils treated with only heavy metals. Poultry manure, cocoa pod and cow dung appeared to have greater potential in removing heavy metals from soils.  

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