Knowledge~

Amaran: Jangan tanya apa-apa, sebab aku sendiri tak tahu kenapa aku baca journal malam-malam. Tentang heavy metal plak tuh. Kalau Billie ngan Kak Long nampak post aku kali neh, mampus aku kena bamboo ngan depa dua. Ini bukan hint aku sambung study or apa-apa, just buat perangai pelik pada malam Merdeka.

Title: Assessment of Heavy Metal Pollution in Surface Water

Link: http://www.ceers.org/ijest/issues/full/v5/n1/501014.pdf

Point Penting

• Water samples were collected once in every month
• From two sites at four monitoring stations
• The samples collected from a depth of 1ft below the surface using Nansen type water sampler and kept in polythene containers (500 mL) with the addition of 2 mL concentrated HNO3 at 2 mL in order to preserve the metals and also to avoid precipitation.
• For the analysis of total heavy metals (dissolved and suspended), water (200 mL) samples were digested with 5 mL of di-acid mixture (HNO3: HClO4 :: 9: 4 ratio) on a hot plate and filtered by Whatman No. 42 filter paper and made up the volume to 50 mL by double distilled using atomic absorption spectrophotometer (AAS)

Reference: Kar, D.; Sur, P.; Mandal, S. K.; Saha, T.; Kole, R. K., (2008). Assessment of heavy metal pollution in surface water. Int. J. Environ. Sci. Tech., 5 (1), 119-124.

Tolong jangan tanya;

Sila baca amaran di atas sekali lagi.