Bioresources and Bioprocessing

Table 8 Summary of the percentage by weight percent of elements for the analyzed raw materials/biochar (SEM–EDS)

From: Potential use of Ulva intestinalis-derived biochar adsorbing phosphate ions in the cultivation of winter wheat Tristicum aestivum

Weight percent (%; range)
Elements	S	B700	B700 + P	SMgCl₂	B700MgCl₂	B700MgCl₂ + P
C	35.4–39.3	37.3–46.3	27.2–48.5	9.2–14.1	8.7–14.4	14.7–21.5
O	40.2–40.5	27.7–31.9	27.4–34.5	17.9–23.1	24.1–36.9	34.1–36.3
Mg	4.3–4.7	5.5–8.9	6.4–6.9	17.7–23.8	16.1–35.3	27.3–37.4
Cl	0.8–1.8	0.5–1.7	0.06–0.09	33.1–47.3	9.6–14.4	0.4–0.5
P	0.7–1.3	0.6–2.3	1.4–3.1	0.3–0.9	0.4–0.6	1.5–1.9
Ca	0.9–1.9	2.1–4.7	2.9–5.8	0.1–0.3	0.7–1.6	0.3–0.5
K	2.5–4.8	2.4–4.6	1.9–3.2	1.2–1.4	0.4–0.8	0.1–0.2
Na	2.3–4.5	6.3–6.6	1.8–3.2	0.4–1.5	0.9–2.3	0.3–0.7
Si	0.5–1.1	1.1–3.7	0.8–3.1	0.3–0.9	0.2–1.6	0,5–0.8
S	4.8–7.4	2.7–8.9	5.5–9.1	0.4–1.2	0.6–2.9	0.4–1.1
Cr, Mn, Fe	0.14–0.45	0.4–0.7	0.5–0.9	0.2–0.8	0.4–0.7	0.3–0.6

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