sci total environ, 2024, https:// doi: 10.1016/j.scitotenv.2024.177359
abstract
given that acetochlor (act) persists in soil for extended periods, disrupting microbial community structure and causing phytotoxicity to sensitive crops, this study investigated the potential of phosphate-modified biochar (pbc-800) to remediate act-contaminated soil. incorporating 0.5 % pbc-800 into fluvo-aquic, red, and black soils increased their adsorption capacities by 80.4 mg g-1, 76.6 mg g-1, and 76.0 mg g-1, respectively. even after six months of aging, the kf values remained 1.6 to 5.1 times higher than in untreated soils. pbc-800 also accelerated act degradation across all three soil types, reducing residual act levels by 34.3 % to 76.4 % after 60 days, and shortening the degradation half-life by 5 to 7 days. high-throughput sequencing revealed that act reduced soil microbial diversity and disrupted community structure, while 0.5 % pbc-800 amendments promoted the growth of degradation-capable genera such as rhodococcus, lysobacter, and gemmatimonas, enhancing microbial ecosystem stability. furthermore, the amendment of soil with 0.5 % pbc-800 reduced act residue concentrations in maize and soybeans by 76.5 % to 82.9 %, and restored plant biomass, leaf chlorophyll content, and mesophyll cell ultrastructure to levels comparable to the control. therefore, amending act-contaminated soil with pbc-800 mitigates ecological and environmental risks, boosts microbial activity, and safeguards plant health.
sci total environ, if=8.2
