Heavy Metals Removal from Agricultural Drains using Rice Husk inside the Stream

Abstract

With the stabilization in water amounts on earth and the population growth and the water use increase in human life with the progress of all facilities and industries, the need to reuse of all available water resources be the most important issue for the research specially the reuse of all wastewater types. For the agricultural wastewater is the huge amount of wastewater and also it is the main disposal for all other wastewater, so its treatment became the most easy way to get new water resource with big quantities and continuity. The most serious problem in the drain wastewater is industrial wastewater pollutants for its containing of heavy metals and toxic substances. The study concentrates on finding a low cost and easy treatment procedure to make the dream of the agricultural drain wastewater reuse possible. Several studies applied agricultural wastes as an adsorbent material for removing successfully heavy metals from wastewater. So, in this study rice husk was used by putting as a block across the steam to work as adsorbing filter to remove the existing zinc and chromium appears due to industrial wastewater direct disposal in agricultural drains wastewater. The obtained Zn+2 removal ratios was 94.33% and Cr (VI) removal ratio was 89.2%. The study illustrated that the removal ratio is proportional with the adsorption media length for the contact time increase. The rice husk waste achieved removal efficiency for zinc better than Cr (VI). The success of use the agricultural waste as cheap adsorbent in treatment of agricultural drains wastewater polluted from industrial wastewater open the door for the existing drains to be easily treated with minimum cost and no effect on their profiles and saving the environment from heavy metals harm pollution.