Health and environment
Mohsen Yazdani; Hosein Alidadi; Aliakbar Dehghan; Mojtaba Davoudi; Mahmood Dankoob; Mahmoud Taghavi; Reza Ataei; Aliasghar Navaei
Volume 26, Issue 1 , March and April 2019, , Pages 153-159
Abstract
Pistachio hull, a by-product of Pistachio processing, is a source of environmental pollution and can cause the health problems. Therefore, it must be treated by proper, sanitary and economical manners. One of the basic parameters for compost valuation is determine the amount of heavy metals. The objective ...
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Pistachio hull, a by-product of Pistachio processing, is a source of environmental pollution and can cause the health problems. Therefore, it must be treated by proper, sanitary and economical manners. One of the basic parameters for compost valuation is determine the amount of heavy metals. The objective of the present study was to determiner the concentration of heavy metals (pb, Cd, cr, Zn, Ni, Cu ) in the compost produced from mixed Pistachio Hull and livestock and Compare levels of heavy metals with the limits of international and internal standards.Material & Methods: This study is a descriptive cross-sectional that in sampling was two-stage in September 2014 and October 2015 A total from 2 composting pile , Compound sampling based ,26sample were selected. After digestion of the samples, the concentrations of metals( Pb ,Cd, Zn,Cr,Cu,Ni) by means of atomic absorption analysis and the concentration of a component in the sample based on mg / kg dw were reported.
Ferdovs Kord MostafaPor; Edris Bazrafshan; Farnaz Heidar Nejad
Volume 20, Issue 2 , May and June 2013, , Pages 142-153
Abstract
Background: Phenol is one of the main components concerned in the industrial wastewater. Physicochemical or conventional biological methods are usually used for the treatment of wastewater with high concentrations of phenol. At present study, the adsorption potential of phenol from aqueous solutions ...
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Background: Phenol is one of the main components concerned in the industrial wastewater. Physicochemical or conventional biological methods are usually used for the treatment of wastewater with high concentrations of phenol. At present study, the adsorption potential of phenol from aqueous solutions by Pistachio hull ash was investigated.
Materials and methods: Present study is an experimental survey that was performed in a batch system. To study the efficiency of Pistachio hull ash in phenol removal from aqueous solutions, the effect of critical variables such as contact time (15, 30, 45, 60, 75, 90, 105 and 120 min), initial phenol concentration (5, 10, 20, 30, 40, 50 and 100 mg/L), adsorbent dosage (0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 g/L) and initial pH of solution (2,3,4,5,6,7,8,9,10,11,12,13) was investigated.
Results: Maximum adsorption capacity of the Pistachio hull ash was 327.6 mg/g at pH 5, initial concentration of 100 mg/L and reaction time 45 min, which 98.28% of the phenol was removed. The adsorption equilibriums were analyzed by Langmuir and Freundlich isotherm models. It was found that the data fitted to Freundlich (R2=0.9436) better than Langmuir (R2=0.8395) model.
Conclusion: According to achieved results, it was observed that Pistachio hull not only was an inexpensive absorbent, but also a quite effective factor in removal of phenol from water and wastewater.