Amicable Knowledge Solution University

Satna, India

Amicable Knowledge Solution University

Satna, India
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Shen F.,Northwest Agriculture and Forestry University | Shen F.,Amicable Knowledge Solution University | Liao R.,Northwest Agriculture and Forestry University | Ali A.,Northwest Agriculture and Forestry University | And 7 more authors.
Ecotoxicology and Environmental Safety | Year: 2017

A large scale survey and a small scale continuous monitoring was conducted to evaluate the impact of Pb/Zn smelting on soil heavy metals (HMs) accumulation and potential ecological risk in Feng County, Shaanxi province of China. Soil parameters including pH, texture, CEC, spatial and temporal distribution of HMs (Cd, Cu, Ni, Pb and Zn), and BCR fractionation were monitored accordingly. The results showed the topsoil in the proximity of smelter, especially the smelter area and county seat, were highly polluted by HMs in contrast to the river basins. Fractionation of Cd and Zn in soil samples revealed higher proportion of mobile fractions than other HMs. The soil Cd and Zn contents decreased vertically, but still exceeded the second level limits of Environmental Quality Standard for Soils of China (EQSS) within 80 cm. The dominated soil pollutant (Cd) had higher ecological risk than Cu, Ni, Zn and Pb. The potential ecological risk (PER) factor of Cd were 65.7% and 100% in surrounding county and smelter area, respectively. The long-term smelter dust emission mainly contributed to the HMs pollution and posed serious environment risk to living beings. © 2017 Elsevier Inc.


Awasthi M.K.,Regional Office | Awasthi M.K.,Amicable Knowledge Solution University | Awasthi M.K.,Hong Kong Baptist University | Pandey A.K.,Madhya Pradesh Private Universities Regulatory Commission | And 4 more authors.
Bioresource Technology | Year: 2014

Influence of fungal consortium and different turning frequency on composting of organic fraction of municipal solid waste (OFMSW) was investigated to produce compost with higher agronomic value. Four piles of OFMSW were prepared: three piles were inoculated with fungal consortium containing 5. l each spore suspensions of Trichoderma viride, Aspergillus niger and Aspergillus flavus and with a turning frequency of weekly (Pile 1), twice a week (Pile 2) and daily (Pile 3), while Pile 4 with weekly turning and without fungal inoculation served as control. The fungal consortium with weekly (Pile 1) turning frequency significantly affected temperature, pH, TOC, TKN, C/N ratio and germination index. High degradation of organic matter and early maturity was observed in Pile 1. Results indicate that fungal consortium with weekly turning frequency of open windrows were more cost-effective in comparison with other technologies for efficient composting and yield safe end products. © 2014 Elsevier Ltd.


Awasthi M.K.,Amicable Knowledge Solution University | Awasthi M.K.,Rani Durgavati University | Pandey A.K.,Madhya Pradesh Private Universities Regulatory Commission | Bundela P.S.,Regional Office | Khan J.,Rani Durgavati University
Bioresource Technology | Year: 2015

The effect of various bulking waste such as wood shaving, agricultural and yard trimming waste combined with organic fraction of municipal solid waste (OFMSW) composting was investigated through assessing their influence on microbial enzymatic activities and quality of finished compost. All three piles of OFMSW with different bulking waste were inoculated with microbial consortium. The results revealed that OFMSW combined with wood shaving and microbial consortium (Phanerochaete chrysosporium, Trichoderma viride and Pseudomonas aeruginosa) were helpful tool to facilitate the enzymatic activity and shortened composting period within 4. weeks. Maximum enzymatic activity were observed in pile 1 and 3 during the first 3. weeks, while in pile 2 relatively very low. But phosphatase activity was relatively higher in all piles until the end of the process. Maturity parameters of compost quality also favored the pile 1 as the best formulation for OFMSW composting. © 2015 Elsevier Ltd.


Wang Q.,Northwest University, China | Li R.,Key Laboratory of Plant Nutrition and the Agri environment in Northwest China | Cai H.,Northwest University, China | Awasthi M.K.,Northwest University, China | And 5 more authors.
Ecological Engineering | Year: 2016

The aims of this study were to investigate the effect of added Ca-bentonite (CB) on nutrient transformation during pig manure (PM) composting and the related effects on Cu and Zn accumulation in crops. Five treatments representing different CB concentrations (0%, 2.5%, 5%, 7.5% and 10% of dry PM weight basis) were mixed with initial feed stock composting system. The end product with application of 5% (wet weight) was also studied in plant growth experiment using Chinese cabbage. The results showed 10% CB amendment could promote dissolved organic carbon (DOC) and organic matter (OM) degradation, improve the total nitrogen, total phosphorus, NO3--N, NH4+-N transformation and significantly enhance immobilization of Zn and Cu heavy metals. CB addition could reduce metal availability through adsorption and complexation of the Zn and Cu metals ions on inorganic components. The increase in pH and OM degradation was likely responsible for the reduction in exchangeable and bioavailable Cu and Zn in CB amended compost. Further pot experiments demonstrated that 5% CB-added compost application improved the yield of Chinese cabbage (Brassica rapa chinensis) with highest biomass (7.43 ± 1.2 g/pot) and significantly reduced the Cu and Zn contents in Chinese cabbage when compared with control. Finally results indicate 10% CB amendment prior to PM composting should be recommended, because the rate of addition was more effective in the immobilization of Cu and Zn concentration through the composting process. © 2015 Elsevier B.V.


Li R.,Northwest University, China | Li R.,Louisiana State University | Wang J.J.,Louisiana State University | Zhou B.,Louisiana State University | And 6 more authors.
Bioresource Technology | Year: 2016

The present study deals with the preparation of a novel MgO-impregnated magnetic biochar (MMSB) for phosphate recovery from aqueous solution. The MMSB was evaluated against sugarcane harvest residue biochar (SB) and magnetic biochar without Mg (MSB). The results showed that increasing Mg content in MMSB greatly improved the phosphate adsorption compared to SB and MSB, with 20% Mg-impregnated MMSB (20MMSB) recovering more than 99.5% phosphate from aqueous solution. Phosphate adsorption capacity of 20MMSB was 121.25 mg P/g at pH 4 and only 37.53% of recovered phosphate was desorbed by 0.01 mol/L HCl solutions. XRD and FTIR analysis showed that phosphate sorption mechanisms involved predominately with surface electrostatic attraction and precipitation with impregnated MgO and surface inner-sphere complexation with Fe oxide. The 20MMSB exhibited both maximum phosphate sorption and strong magnetic separation ability. Overall, phosphate-loaded 20MMSB significantly enhanced plant growth and could be used as a potential substitute for phosphate-based fertilizer. © 2016 Elsevier Ltd.


Mahar A.,Northwest Agriculture and Forestry University | Mahar A.,University of Sindh | Wang P.,Northwest Agriculture and Forestry University | Ali A.,Northwest Agriculture and Forestry University | And 6 more authors.
Ecotoxicology and Environmental Safety | Year: 2016

Mining operations, industrial production and domestic and agricultural use of metal and metal containing compound have resulted in the release of toxic metals into the environment. Metal pollution has serious implications for the human health and the environment. Few heavy metals are toxic and lethal in trace concentrations and can be teratogenic, mutagenic, endocrine disruptors while others can cause behavioral and neurological disorders among infants and children. Therefore, remediation of heavy metals contaminated soil could be the only effective option to reduce the negative effects on ecosystem health. Thus, keeping in view the above facts, an attempt has been made in this article to review the current status, challenges and opportunities in the phytoremediation for remediating heavy metals from contaminated soils. The prime focus is given to phytoextraction and phytostabilization as the most promising and alternative methods for soil reclamation. © 2015 Elsevier Inc.


Awasthi M.K.,Northwest University, China | Awasthi M.K.,Amicable Knowledge Solution University | Wang Q.,Northwest University, China | Huang H.,Northwest University, China | And 8 more authors.
Bioresource Technology | Year: 2016

This study aimed to evaluate the role of different amount of zeolite with low dosage of lime amendment on the greenhouse gas (GHGs) emission and maturity during the dewatered fresh sewage sludge (DFSS) composting. The evolution of CO2, CH4, NH3 and N2O and maturity indexes were monitored in five composting mixtures prepared from DFSS mixed with wheat straw, while 10%, 15% and 30% zeolite + 1% lime were supplemented (dry weight basis of DFSS) into the composting mass and compared with treatment only 1% lime amended and control without any amendment. The results showed that addition of higher dosage of zeolite + 1% lime drastically reduce the GHGs emissions and NH3 loss. Comparison of GHGs emissions and compost quality showed that zeolite amended treatments were superior than control and 1% lime amended treatments. Therefore, DFSS composting with 30% zeolite + 1% lime as consortium of additives were found to emit very less amount of GHGs and gave the highest maturity than other treatments. © 2016 Elsevier Ltd.


Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Wang Q.,Northwest Agriculture and Forestry University | Ren X.,Northwest Agriculture and Forestry University | And 7 more authors.
Bioresource Technology | Year: 2016

The objective of the present study was to mitigate the greenhouse gas (GHG) emissions during composting of dewatered fresh sewage sludge (DFSS) employing biochar combined with zeolite (B + Z) and low dosage of lime (B + L). The 12% biochar was mixed at a 10%, 15% and 30% of zeolite and 1% lime, while without any additives was used as control. The results indicated that the combine use of B + Z was significantly increased the enzymatic activities and reduced the ammonia loss 58.03–65.17% as compare to B + L amended treatment, while CH4 92.85–95.34% and N2O 95.14–97.28% decreased than control. The B + L1% amendment significantly increased the organic matter degradation but the reduction was lower than B + Z and that could reduce the CH4 and N2O emission by 55.17–63.08% and 62.24–65.53% as compare to control, respectively. Overall our results demonstrated that 12%B + Z10% addition into DFSS can be potentially used to improve the DFSS composting by mitigation of GHG emission and nitrogen loss. © 2016 Elsevier Ltd


Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Wang Q.,Northwest Agriculture and Forestry University | Huang H.,Northwest Agriculture and Forestry University | And 8 more authors.
Journal of Cleaner Production | Year: 2016

In the present study, we evaluated the feasibility of biochar amended with lime (B + L) to reduce the loss of ammonia, greenhouse gas (GHG) emissions and the bio-availability of heavy metals (HMs) during composting of dewatered fresh sewage sludge (DFSS) and to improve the end product quality. Biochar mixed with a low dosage of lime was supplemented at a 1:1 ratio into DFSS and wheat straw (dry weight basis), and compared with a lime only amendment and a control without any amendment. The CO2 emission profile clearly indicated that the B + L addition was effectively buffered a pH ∼8.0, and the B + L amendment experienced an enhanced the rate of decomposition compared to control and lime amended treatments. In aerobic co-composting, the B + L amendment effectively reduced the loss of ammonia, CH4, and N2O emission. B + L amended DFSS compost also showed significantly higher concentrations of humic-acid (17.23%) and fulvic-acid (3.79%) compounds, effectively reduced the bio-availability of HMs (34.81% Cu, 56.74% Zn, 87.96% Pb and 86.65% Ni) and improved compost maturity compared to control and lime amendments. Furthermore, the B + L amendment increased the adsorption of ammonium ions by reducing the ammonia loss and N2O emission, resulting in compost with higher nutrient concentrations. These results can be used to formulate the initial feedstock for industrial scale composting processes. © 2016 Elsevier Ltd


Wang Q.,Northwest Agriculture and Forestry University | Wang Z.,Northwest Agriculture and Forestry University | Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | And 7 more authors.
Bioresource Technology | Year: 2016

The purpose of this research was to evaluate the effect of medical stone (MS) on nitrogen conservation and improving the compost quality during the pig manure (PM) composting. Five treatments were designed with different concentrations of MS0%, 2.5%, 5%, 7.5% and 10% (on dry weight of pig manure basis) mixed with initial feed stock and then composted for 60 days. The results showed that MS amendment obviously (p < 0.05) promoted the organic waste degradation and prolonged the thermophilic phase as well as enhanced the immobilization of heavy metals Cu and Zn. With increasing the amount of MS, the NH3 loss and N2O emission were significantly reduced by 27.9–48.8% and by 46.6–85.3%, respectively. Meanwhile, the MS amendment could reduce the NO2 −-N formation and increase the NO3 −-N content. Finally our results suggested that 10%MS addition could significantly reduce the nitrogen conservation as well as improve the quality of compost. © 2016 Elsevier Ltd

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