Upaya Penurunan Krom Heksavalen Pada Air Tambang Nikel Dengan Menggunakan Reduktor Ferro Sulfat. Journal of Chemical Process Engineering, [S. l.], v. 2, n. 2, p. 45–51, 2017. DOI: 10.33536/jcpe.v2i2.885. Disponível em: https://jurnal.fti.umi.ac.id/index.php/JCPE/article/view/885. Acesso em: 1 jul. 2025.