Analisis risiko kesehatan lingkungan (ARKL) akibat pajanan merkuri pada pertambangan emas skala kecil (PESK) (studi kasus pada Kabupaten Batanghari Propinsi Jambi) = Health and environmental risk assesment of mercury exposure artisanal and small-scale gold mining (ASGM) (case study in Batanghari District of Jambi Province)