Reducing Zinc and Chromium in Wastewater Treatment Biosolid Through Sulfuric Acid Extraction

Mu’tassim Billah (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)
Disty Nur Rohmah (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)
Faisal Amri Sholahuddin (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)
Renova Panjaitan (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)
Kindriari Nurma Wahyusi (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)
Retno Dewati (Department of Chemical Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur. Surabaya 60294, Indonesia)

Nusantara Science and Technology Proceedings
3rd International Conference Eco-Innovation in Science, Engineering, and Technology

The separation of heavy metals, zinc (Zn) and chromium (Cr), in biosolid waste can be carried out by an extraction process using H2SO4 as a solvent. The extraction process was carried out with a variation of time agitation and sulfuric acid concentration. The extracted cake was then analyzed using the atomic absorption spectrophotometry (AAS) method. The most effective reduction in Zn and Cr levels was obtained at 120 minutes and a solvent concentration of 1.5M with an efficiency of 98.80% and 97.89%, respectively.