Mineralization and Crop Uptake of Nitrogen from Textile Manufacturing Wastewater Sludge Cake

Table 2

Concentration in the sludge of the 20 elements exceeding 10 mg kg⁻¹ in addition to C, H, O, N, K, and S. Means and standard deviations (s.d.) are for 𝑛=3.

Element	Mean	s.d.
	mg kg^−1 dry mass
Fe	8214	279
P	5254	380
Ca	3544	474
Mg	1538	250
Cu	1004	43
Mn	838	143
Al	711	15
B	498	79
Ti	190	14
Zn	129	16
V	117	3
Cr	101	11
Ni	70	8
Zr	40	7
Ba	40	6
Pb	31	11
Ta	26	23
Sr	22	2
As	13	15
Co	13	1