Investigation of the phosphorus removal capacities of basic oxygen furnace slag under variable conditions.
Effects of reaction time, initial phosphorus concentration, basic oxygen furnace slag (BOF-slag) dosage and size, and temperature on the phosphorus removal capacities (PRCs) of BOF-slag have been investigated in detail through batch tests. Weakly bound phosphorus, Fe- and Al-associated phosphorus, and Ca-associated phosphorus from fresh and reacted BOF-slag were analysed using sequential chemical extraction processes. It was determined that the PRCs of BOF-slag increased with the increase of initial phosphorus concentration and temperature while it decreased with the increase of BOF-slag dosage and size. The phosphorus removed by BOF-slag was primarily assigned to weakly bound phosphorus and Ca-associated phosphorus. Weakly bound phosphorus showed a significant decrease with the increase in all experimental parameter values. However, Ca-associated phosphorus exhibited a prominent increase with increasing reaction time, initial phosphorus concentration, and temperature. These demonstrate that experimental parameters can simultaneously affect the PRCs of BOF-slag and the ways of phosphorus removal by BOF-slag.
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
Chong
C
Han
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
Zhen
Z
Wang
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
Wangjin
W
Yang
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
Qianqian
Q
Wu
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
He
H
Yang
a School of Materials & Metallurgy , Northeastern University , Shenyang , People's Republic of China.
Xiangxin
X
Xue
D007220:Industrial Waste / Q000032:analysis; D010087:Oxides / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D010758:Phosphorus / Q000302:isolation & purification*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D010087:Oxides; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D010100:Oxygen
Ca-associated phosphorus; Fe- and Al-associated phosphorus; Phosphorus removal capacities; basic oxygen furnace slag; weakly bound phosphorus