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VERMIKOMPOSTING dan BIOAKUMULASI LOGAM BERAT


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VERMIKOMPOSTING  dan BIOAKUMULASI LOGAM BERAT

 

Pengaruh logam berat terhadap aktivitas spesies cacing tanah Eudrillus eugineae dipelajari selama Vermicomposting limbah padat perkotaan ( MSW ), diperlakukan dengan logam berat .

Aktivitas cacing tanah , dengan indikatornya pertumbuhan dan produksi biomassa dan jumlah kepompong yang dihasilkan , dimonitor secara berkala , dan konsentrasi logam berat pada cacing tanah dan substrat ditentukan pada interval tertentu .

Percobaan skala laboratorium dilakukan dengan mencampur logam berat dengan limbah MSW . Tembaga , kadmium , kromium , timah , dan seng yang dipilih untuk penelitian.

Studi ini menyimpulkan bahwa logam berat cenderung mengakumulasi dalam tubuh cacing tanah.  Oleh karena itu, konsentrasi logam berat dalam bahan baku Vermicomposting harus dipertimbangkan dalam kaitannya dnegan kompos dari MSW dan aplikasinya untuk pemupukan tanah dan tanaman.

Tembaga dan kadmium sangat beracun bagi cacing pada konsentrasi 1,5 dan 0,1 g / kg limbah .

Penelitian juga menunjukkan bahwa cacing tanah rentan terhadap bentuk bebas dari logam berat . Kadmium adalah logam yang paling beracun , diikuti oleh tembaga .

Cacing tanah harus dipisahkan dari kotorannya  sebelum kotoran cacing (Ivermikompos) ini digunakan untuk memupuk tanah dna tanaman.

 

Sumber:  Kumar, Sunil Sharma, Vishal; Bhoyar, R V; Bhattacharyya, J K; Chakrabarti, Tapan. 2008.  Effect of Heavy Metals on Earthworm Activities During Vermicomposting of Municipal Solid Waste.  Water Environ. Res., 80, 154 (2008).

 

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