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Table 5 Cost of preparing biochar adsorbent

From: Specifically designed amine functional group doped sludge biochar for inorganic and organic arsenic removal

No.

Project

Cost (USD)

1

Chemical fee

1100

2

Water fee

890

3

Electricity fee

15

4

Labor costs

20

5

Raw material costs (sludge)

0

The cost of preparing biochar (USD kg−1)

6.75