本文選題：脫硫石膏 + 鹽堿土　； 參考：《干旱區(qū)資源與環(huán)境》2017年11期

【摘要】：為實(shí)現(xiàn)燃煤煙氣脫硫廢棄物再利用,使其能運(yùn)用于新疆大面積鹽堿地改良,在新疆農(nóng)八師134團(tuán)鹽堿地施用脫硫石膏,研究滴灌條件下脫硫石膏對(duì)鹽堿土壤理化性質(zhì)以及土壤重金屬含量的影響,評(píng)估脫硫石膏改良鹽堿土的可行性和安全性。結(jié)果表明:鹽堿地施用脫硫石膏后土壤容重降低,0.25mm團(tuán)聚體數(shù)量增加,土壤孔隙度增加;土壤pH值、堿化度和電導(dǎo)率降低,尤其在0-10cm、10-20cm土層改善效果明顯;土壤中Na~+、Cl~-含量降低,0-10cm土層較其他土層Na~+含量下降明顯,于對(duì)照相比下降40.62%,表層土壤中Ca~(2+)、SO_4~(2-)含量增加,有利于降低土壤鹽堿危害;施用脫硫石膏對(duì)土壤Hg含量沒(méi)有影響,Cr元素含量下降,各項(xiàng)重金屬元素含量均遠(yuǎn)低于國(guó)家環(huán)境二級(jí)標(biāo)準(zhǔn),說(shuō)明施用脫硫石膏不會(huì)對(duì)土壤造成重金屬污染。綜上所述,脫硫石膏對(duì)鹽堿地有一定的改良效果且不會(huì)對(duì)土壤安全造成威脅。
[Abstract]:In order to realize the reuse of coal-fired flue gas desulphurization waste and make it suitable for the improvement of large area of saline and alkaline land in Xinjiang, desulfurization gypsum was applied in the salt and alkali land of 134th regiment of Nong Bashi Division, Xinjiang. The effects of desulphurization gypsum on the physical and chemical properties of saline-alkali soil and the content of heavy metals in the soil were studied in order to evaluate the feasibility and safety of desulphurization gypsum in improving saline-alkali soil. The results showed that the soil bulk density decreased by 0.25 mm and the soil porosity increased after the application of desulphurized gypsum on saline-alkali soil, and the soil pH, alkalinity and electrical conductivity decreased, especially in 0-10 cm ~ (-20) cm soil layer. The content of Na ~ (2 +) in soil decreased obviously in 0-10cm soil layer than in other soil layers, and decreased by 40.62% in comparison with the control, and the content of Ca ~ (2) so _ 4 ~ (2-) in surface soil increased, which was beneficial to reduce the harm of soil salinization and alkali-alkali. The application of desulphurized gypsum had no effect on the content of Hg in soil, and the contents of heavy metals were far lower than that of the national environmental secondary standard, indicating that the application of desulphurized gypsum would not cause heavy metal pollution to the soil. To sum up, desulphurization gypsum has certain improvement effect on saline-alkali land and will not threaten soil safety.
【作者單位】： 石河子大學(xué)/新疆兵團(tuán)綠洲生態(tài)農(nóng)業(yè)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃課題(2016YFC0501406) 兵團(tuán)科技攻關(guān)與成果轉(zhuǎn)化項(xiàng)目(2016AD022)資助
【分類號(hào)】：S156.4

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