| abstract |
The invention discloses a heavy metal-polluted soil modifier and application thereof. The modifier comprises the following raw materials in parts by weight: anionic surfactant synergistic humic acid intercalated magnesium-aluminum hydrotalcite 46-72 parts, octadecyl triacetate 4-18 parts of methylammonium bromide modified iron-aluminum pillared bentonite, 5-25 parts of ball milled iron-modified oyster shell, 8-27 parts of biochar, 4-10 parts of dolomite and 1.5-7 parts of synergist. The raw materials used for preparing the improver are safe, can improve soil pH, promote crop growth, passivate the effectiveness of heavy metal cadmium in soil, improve the tolerance of crops to heavy metal cadmium, and can improve soil quality at the same time. The heavy metal contaminated soil conditioner provided by the invention is a product with remarkable passivation effect of cadmium pollution in farmland soil and is ecologically friendly, and is helpful for the safe production of agricultural products. |