Microscale zero-valent iron creates a trade-off between arsenic remediation and methane emissions in paddy soil–rice systems
Arsenic (As) contamination and methane (CH 4 ) emissions are major environmental concerns in flooded paddy fields. Microscale zero-valent iron is widely used for As immobilization owing to its high affinity for As, yet its effects on CH 4 cycling and the underlying microbial mechanisms remain poorly understood. T...