L-Histidine-Modified Silica from Rice Husk and Optimization of Adsorption Condition for Extractive Concentration of Pb(II). The Journal of Pure and Applied Chemistry Research, [S. l.], v. 7, n. 2, p. 198–208, 2018. DOI: 10.21776/ub.jpacr.2018.007.02.402. Disponível em: https://jpacr.ub.ac.id/index.php/jpacr/article/view/402. Acesso em: 24 may. 2025.