Synergistic Removal of β-Hexachlorocyclohexane from Water via Microorganism–Plant Technology and Analysis of Bacterial Community Characteristics

In recent years, β-Hexachlorocyclohexane (β-HCH) has been detected frequently in water, seriously threatening human health and ecological balance. To explore the effects of different treatment groups on removal β-HCH experimental water response microbial community structure system, three strains β-HCH-degrading bacteria—Ochrobactrum sp. (Och1, Och2) Pseudomonas (Pse1)—combined with Canna were selected for microbial, plant, microbe–plant repair hydroponic experiments, respectively. Solid-phase extraction combined GC-ECD high-throughput sequencing determined content bacterial tissues. The results showed that when stress concentrations 10 μg·L−1 100 μg·L−1, Och1 Pse1 best degradation performance (33.49% 60.02%, respectively). Following this, degrading Canna. Under two concentrations, combination Och1–Canna highest efficiency (96.74% 99.06%). At same time, we measured concentration tissues found had a better effect addition may significantly improve absorption capacity roots. addition, relative abundance Methophilic bacteria root samples increased after inoculation bacteria, suggesting be vital benzene-ring-containing substances. this research can provide theoretical basis technical support prevention control non-point source pollution organic pesticides.