『Abstract
The importance of the effect of phosphate rock depends on the
chemical form of phosphorus in which this element is combined.
The paper presents the results of inorganic and organic forms
of phosphorus in the phosphate rock from Mazidag-Derik, Semikan
deposit located at Mardin city at SE Anatolia of Turkey. Total
phosphorus concentration in the rock is an average 18.5%. The
inorganic phosphorus mean % contents were 99.98% for studied sedimentary
phosphate rock. Speciation of inorganic phosphorus was carried
out using a method based on sequential extractions of the sedimentary
phosphate rock each releasing four forms of inorganic phosphorus:
loosely sorbed phosphorus, phosphorus bound to aluminium (P-Al),
phosphorus bound to calcium (P-Ca) and phosphorus bound to iron
(P-Fe). Calcium bound phosphorus is the dominant form of inorganic
phosphorus in the studied sedimentary phosphate rock. aluminium
bound phosphorus is the second, iron bound phosphorus is the third
most prevailing form. Loosely bound phosphorus is present in the
lowest amounts. Analyses of phosphorus forms in sedimentary phosphate
rock using a UV spectrophotometric method and ICP-AES are reported
here. For the phosphorus the two methods give the same results
and the concentrations are in good agreement with the reference
values.
Keywords: Extraction; Speciation; ICP-AES; Geochemistry; Phosphate
ore; Turkey』
1. Introduction
2. Experimental
3. Results and discussion
4. Conclusions
References
(±は標準偏差) |
||
UV | ICP-AES | |
P-total(全リン) | 18.34±0.05 | 18.69±0.01 |
P-mineral(全鉱物質リン) | 99.97±0.26 | 99.98±0.12 |
P-Ca(カルシウム結合リン) | 75.93±0.72 | 73.94±0.15 |
P-Fe(鉄結合リン) | 6.21±0.24 | 5.91±0.72 |
P-Al(アルミニウム結合リン) | 18.92±0.25 | 18.71±0.12 |
Loosely bound-P(ゆるく結合したリン) | 0.22±0.04 | 0.20±0.01 |