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Table 2 Analyzed chemical elements analyzed and their place in the study

From: Valuable elements in sludge from eight municipal wastewater treatment plants in relation to their recovery potential

Groups

Elements

Macronutrient

N, P, K, Ca, Mg

Micronutrient

B, Fe, Mo, Mn, Zn, Cu, Ni

Heavy (hazardous) metals and metalloids

Zn, Cu, Ni, Cr, Co, As, Cd, Hg, Pb

Critical, Strategic and Precious elements

Cu, Ni, Cr, Co, Mg, Mn, B, As, Li, Al, Ti, V, Sr, Ga, Sb, Pd, Ag, Au

  1. Elements in bold belong to more than one group