TY - JOUR ID - 42792 TI - Leaching Zn, Cd, Pb, and Cu from Wastewater Sludge Using Fenton Process JO - Journal of Health Sciences & Surveillance System JA - JHSSS LA - en SN - 2345-2218 AU - Azhdarpoor, Abooalfazl AU - Hoseini, Rabieh AU - Dehghani, Mansoureh AD - Assistant Professor, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran; AD - MA student of Environmental Health Engineering, Shiraz University of Medical Sciences, Shiraz, Iran; AD - Associate Professor, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran Y1 - 2015 PY - 2015 VL - 3 IS - 4 SP - 153 EP - 159 KW - Fenton KW - Heavy metals KW - Hydrogen peroxide KW - Wastewater sludge DO - N2 - 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), hydrogen peroxide concentration (0.5-6 g/l), Fe concentration (0.5-4 g/l), and leaching time (5-60 min), were studied. Results: The results showed that the optimal condition for leaching of heavy metals occurred at pH of 2 3, hydrogen peroxide concentration of 3 g/l, iron concentration of 2 g/l, and leaching time of 15 min. Under these optimal conditions, 92% of Zn, 100% of Cd, 100% of Pb, and 80% of Cu were leached from the wastewater sludge. Conclusions: Fenton method can leach heavy metals from wastewater sludge through decomposition of organic materials at H2O2/Fe ratio of 1.5:2. UR - https://jhsss.sums.ac.ir/article_42792.html L1 - https://jhsss.sums.ac.ir/article_42792_7ee953570656b6a6df712ad2f44dd9eb.pdf ER -