[Principal physicochemical properties of artificial soil composed of sewage sludge stabilized by fly ash].
The pH, nutrients and heavy metals of stabilized sewage sludge were investigated by mixing municipal sewage sludge with alkaline fly ash and mine tailing. The results indicate that water-holding capacity of artificial soil III (FA : SS = 1 : 1) and II (FA : SS = 2 : 1) treatments were significantly higher than that of CK (brown meadow soil), while that of the IV (FA : SS = 1 : 2) treatment was similar to CK; The nutrients contents (organic matter, N, P, K) of stabilized sewage sludge were up to a high fertilizer level. Moreover, with decrease of the ratio of fly ash to sewage sludge, the nutrient content of artificial soils increased. Except total Ni content of III (FA : SS = 1 : 1) treatment was high (187.67 mg x kg(-1)), Cd, Pb, Cu, Zn, and Cr for all artificial soil treatments were all significant lower than control standards for pollutants in sludges and fly ash from Agricultural use (GB 4284-84, GB 8173-87).
Zhang
Hong-Ling
HL
Institute of Shenyang Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. zhl19792002@163.com
Sun
Li-Na
LN
Sun
Tie-Heng
TH
D002244:Carbon / Q000737:chemistry*; D003031:Coal; D060729:Coal Ash; D052918:Environmental Restoration and Remediation / Q000379:methods; D007501:Iron; D008906:Mining; D052638:Particulate Matter / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000737:chemistry*; D012987:Soil
D003031:Coal; D060729:Coal Ash; D052638:Particulate Matter; D012722:Sewage; D012987:Soil; D002244:Carbon; D007501:Iron