Increasing recovery opportunities of metal(loid)s from municipal solid waste via landfill leachate recirculation

•Resource recovery from leachate is crucial strategies as its sustainable approach.•The factors effect on metal(loid)s concentrations in the leachate were studied.•Significant correlations between metal(loid)s concentration and pH were found.•The first leachate recirculation cycle increased metal(loid)s concentrations.