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研究了改性小麦秸秆对赤潮异弯藻的去除作用和机制.结果表明,在与未改性秸秆相同用量(0.10 g/L)的情况下,在120 m in时,改性秸秆对赤潮异弯藻的去除率可以从10%左右提高到80%以上.为了探讨改性秸秆对赤潮异弯藻的去除机制,测定了核苷酸在260 nm时的吸光度,结果发现水体内核苷酸物质浓度增大,说明在此作用过程中,藻细胞膜结构遭到破坏,核苷酸物质由胞内释放.当改性秸秆用量为0.15 g/L时,释放核苷酸在260nm时吸光度与正常细胞的吸光度比值为1.17,此时改性秸秆对赤潮异弯藻造成的损害是不可逆的.实验发现,改性秸秆对赤潮异弯藻同时具有吸附作用和灭杀作用.当浓度较低时,改性秸秆通过吸附细胞体,或者与细胞膜结合,从而导致部分藻细胞的絮凝;而当浓度进一步增加时,改性秸秆可以破坏细胞膜的结构,导致大量膜内物质的释放,进而导致藻细胞的死亡.
The removal effect and mechanism of modified wheat straw on Heterosigma akashiwo were studied.The results showed that when the same amount of unmodified straw (0.10 g / L) In order to investigate the removal mechanism of modified straw on Heterosigma akashiwo, the absorbance of nucleotides at 260 nm was measured. The results showed that the concentration of nucleotide in water Increased, indicating that in this process, the algae cell membrane structure was destroyed, the release of nucleotide material by the intracellular.When the amount of modified straw was 0.15 g / L, the release of nucleotides at 260nm when the absorbance of normal cells The ratio of absorbance was 1.17, at this time, the damage of modified straw on Heterosigma akashiwo was irreversible.It was found that the modified straw had both adsorption and killing effects on Heterosigma akashiwo.When the concentration was low, Stalks adsorb the cell body or combine with the cell membrane, resulting in the flocculation of some algal cells. When the concentration is further increased, the modified straw can destroy the structure of the cell membrane, leading to the release of a large amount of membrane material, leading to the death of the algal cells.