- Phantich nhom (CA) la phuong phap thong ke da bien nham phan loai so lieu thanh
i thch: c<c trj reng co ga tr Ion ho nJ dugc n dam, la cac trj reng co nghTa) Ta da dem A, a PC thu nhat, tr reng
Tai dia diem A, a PC thu nhat, tri rieng
iuQC la 7,6511 chiem 69,6% phuong sai ciia
SO lieụ Cac yeu to anh huong Idn den PC la nong dp Cr, Co, Fe, Nị Trong PC thu 2
(chiem 10,5% phuang sai cua lap so lieu), ngu\en to anh hudng Idn nhat la Hg. sau do la Pb. Tai dia diem B, d PC thu nhat, tri rieng dat duac la 4,6985 chiem 47% phuang sai cua tap
/ /
li^ụ Cac yeu td anh hudng lan din PC nay la Ig dp Cu , Zn, Cr, Nị Trong PC thir 2 (chilm ,4 % phuang sai cua tap so lieu), nguyen td 1 hirdng lan nhit la Cd, sau đ din Fe, As, )i ciing la Cọ
Nhu vay mau dat tai hai dia dilm A va dia m B deu bi anh hirdng bai cac kim loai nang
Ni, FẹTrong đ a dia dilm thir nhit Fe, Cr, ciing anh hu-dng din PCl,chmig td 3 nguyen nay xuat phat tir ciing mgt nguon la sin cd ng thanh phan tir nhien ciia dat. Cdn dja dilm caham lugng Cr, Ni dIu anh hirdng din PCI rng td xuat phat chiing xult phat ciing I jon gdc nhirng khac ngudn goc vai Fe trong udat.
*Mau cay thuoc:
Bien luan ket qua tuong tu nhu cac mau dat ) thay vdi 2 PC dau tien vdi phuang sai tich dat duoc la 72,7% (cac mau cay lay tai dia :m A) va 75,8% (vdi cac mau cay lay tai dia
m B la du de bieu dien tap so lieụ
Tai dia diem A, cac yeu to anh hudng Idn 1 PCI nay la nong do Fe (tri rieng 0,404), As
rieng 0,392), Pb (trj rieng 0,382), Cu (tri ig 0,356), Co (tri rieng 0,336). Trong PC thu :hiem 23,8% phuang sai ciia tap so lieu), cac lyen to anh hudng Idn nhat la Cd (trj rieng - 82), Mn (trj rieng -0,421), Zn (tri rieng - 79). Con tai dja di(lm B, d PCI vdi tri rieng
dirge la 4,9481 (chiem 49,5% phuong sai tap so lieu) thi cac yeu to anh hudng Idn PC nay la nong do Co (tri rieng 0,434). Fe rieng 0,429), Zn (trj rieng 0,381). Trong
I (vdi 26,3% phuong sai ciia tap sd lieu), cac
yen t6 anh huong Idn nhat la As (tri rieng )7), Ni (tri rieng 0,470) va Cr( tri rieng
59).
Nhu vav, cac cav thudc khao sat tai 2 dia
d.em A va B deu bi anh hudng Idn bdi cac kim loai nang la As va FẹTrong do d dja dilm A thi As va Fe cung anh hudng din PCI chung to xuat phat tu cung mot ngudn 6 nhilm, ngudn nay co thi do ylu td tich tu kim loai nang lau dai trong dat do phan bon, do nude tudị Con dja diem B, As va Fe anh hudng din 2 PC khac nhau, chirng td xuat phat tu 2 ngu6n khac nhaụ Trong do Fe la thanh phan sin cd trong dat, con As cd the xuat phat tu nguon nude ng^m d Ha Npi CO nhiem As.