background: high amount of heavy metals in sludge is one of the major obstacles to its use on farms. the present study aimed to investigate the possibility of leaching heavy metals from wastewater sludge by fenton method and determine the optimum level of parameters, such as iron, hydrogen peroxide, time, and ph for fenton reaction.   methods: the effects of various parameters, such as ph (2-9)...

abstract background: heavy metals in industrial wastewater especially chromium (vi) are considered as the main environmental pollutants. methods: electrochemical cell made of plexiglass with a volume of 1.95 lit was used. iron and graphite electrodes, electricity conductor, each with dimensions of 0.1×3×10 cm (width×length×height) were designed and built. tests were carried out in various condi...

several factors effect on sorption of polycyclic aromatic hydrocarbons (pahs) in soil. co-existence of metals and organic matter of soil are among important affecting factors on sorptive behavior of pahs. this research investigated the effect of organic matter content and heavy metals (lead, nickel and zinc), on sorption of phenanthrene onto kaolinite. for this purpose, sorption of the organic ...

the concentration (mg/kg dry weight) of cd, cr and pb were determined in onion leaves samples using the atomic absorption spectrometry. a total of 16 onion leaves each were collected from both the study and control sites for analysis. the heavy metals, cd, cr and pb in onion leaves of study sites were found in the range of 0.667 – 0.933, 3.870 – 7.870 and 5.870 – 7.537mg/kg respectively, ...

algae have been proven efficient biological vectors for heavy metal uptake. in order to further study their biosorption potential, two strains spirogyra sp. and spirulina sp. have been studied under different initial metal concentrations. in recent years, the biosorption processes have been studied extensively using microbial biomass as biosorbent for heavy metal ions removal. in these studies...

Several electroplating industry including agricultural sector industries, sewage treatment and mining operations all combine to generate hazardous waste water containing enormous amounts of toxic heavy metals. The accumulation of toxic heavy metals in human beings and animals cause many metabolic disorders. Heavy metal concentration was estimated in sewage, sludge and electroplating wastewater ...

Background: Heavy metals contaminated environment constitutes a serious problem for human and other organisms. Moreover, metals such as Cd, Pb, and Cr are toxic metals. Therefore, the purpose of this study was to evaluation of Cd, Pb, and Cr in the muscle of cow, calf, and sheep slaughtered in Sanandaj city from Iran. Methods: This was a descriptive cross-sectional study in Sanandaj city in...

kamran asgari1, hosein amini2   1- organic farming systems, wageningen university, wageningen, the netherlands   2- faculty of agriculture, khorasgan branch, islamic azad university, isfahan, iran     received: 5 february 2011 accepted: 23 november 2011         *corresponding author: email:[email protected]     abstract   effects of soil and atmosphere pollution on some heavy metals (fe, ...

A greenhouse experiment has been planned for this study to delineate the benefits of two types of rice husk biochars (namely B300 and B600 which are prepared at 300°C and 600°C, respectvely) and coal fly ash (CFA), as soil amendments, for decreasing the amount of some heavy metals (like Pb, Cd, Ni, Cr, and Cu) as well as mobility and phytoavailability in an artificially-calcareous multi-element...