Xie Yanluo, Xiao Kemeng, Sun Yang, Gao Yufeng, Yang Han, Xu Heng
Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China.
R Soc Open Sci. 2018 Aug 29;5(8):181138. doi: 10.1098/rsos.181138. eCollection 2018 Aug.
An improved method was applied for remediating cadmium and copper co-contaminated soil and reducing the metal concentration in . Pot experiments were conducted with six amendments (composed with bentonite, phosphate, humic acid, biochar, sepiolite powder, etc.). The results showed that soil pH, biological activities (soil enzymatic activities and microbial counts) and biomass were greatly improved with the addition of amendments in all treatments, especially in T3 and T6. Also, amendments effectively decreased the concentration of malondialdehyde and HO in . In the T3 treatment, the bio-available Cd and Cu in soil were significantly decreased by 0.53 and 0.41 mg kg, respectively. Meanwhile, the amendment in T3 reduced Cd and Cu accumulation in about 45.83 and 39.37%, respectively, compared to T0. Moreover, the Fourier transform infrared spectroscopy spectra showed the surface functional groups of every amendment. To conclude, this study offers an effective and environmental method to reduce metal accumulation in on heavy metal co-contaminated soil.
一种改良方法被应用于修复镉和铜共污染土壤并降低其中的金属浓度。进行了盆栽试验，使用了六种改良剂（由膨润土、磷酸盐、腐殖酸、生物炭、海泡石粉等组成）。结果表明，在所有处理中添加改良剂后，土壤pH值、生物活性（土壤酶活性和微生物数量）以及生物量都有显著提高，尤其是在T3和T6处理中。此外，改良剂有效降低了丙二醛和HO的浓度。在T3处理中，土壤中生物可利用的镉和铜分别显著降低了0.53和0.41 mg/kg。同时，与T0相比，T3处理中的改良剂使镉和铜在植物中的积累分别减少了约45.83%和39.37%。此外，傅里叶变换红外光谱显示了每种改良剂的表面官能团。总之，本研究提供了一种有效且环保的方法来减少重金属共污染土壤中植物的金属积累。
