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.
Health and environment
mohsen yazdani; aliasghar najafpoor; aliakbar dehghan; hosein alidadi; mahmood dankoob; Reyhane Zangi; masoume saghi; aliasghar navaei
Volume 25, Issue 1 , May and June 2018, , Pages 143-149
Abstract
Background and objectives: among the different type of antibiotics, the tetracycline occupied the 2end level of the more prevalence types in produce and use aspect worldwide and their existence in domestic wastewater will pollute our water resources. The aim of this study was to determine the performance ...
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Background and objectives: among the different type of antibiotics, the tetracycline occupied the 2end level of the more prevalence types in produce and use aspect worldwide and their existence in domestic wastewater will pollute our water resources. The aim of this study was to determine the performance of US/UV/H2O2 processes when reduction of tetracycline antibiotic from an aqueous environment was objected. Material and methods: the current experimental study use the ultrasonic bath simultaneously with ultraviolet wave and hydrogen peroxide. To detect the effect of variables include contact time(5-60 min), the antibiotic concentration (5-25 mg/l), pH(3-10), hydrogen peroxide concentration (5-20 mg/l) and the input power (90- 300 W) of instrument in process, the reactor has been sampled in different intervals and the residue concentration to be used to detect with spectrophotometer instrument in 261 nm length wave. Results: the result have been showed that the separately use of UV and US will not take a high performance with the best removal percent of 16% and 32%. Simultaneously use of US/UV/H2O2 cached a more highly reduction in tetracycline concentration and the best reduction was 83 % removal that took place in pH= 4.5, antibiotic concentration of 10 mg/I, input power of 240 W, hydrogen peroxide concentration of 20 mg/l, time equal with 50 min. Conclusion: the result have been showed that the US/UV/H2O2 process can be used as a performance process to remove the tetracycline antibiotic from an aqueous environment.