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Li Hini Thieng vd Dig Tap chi KHOA HOC & CONG NGHE 86(10) 107 113 NGHIEN c u t ) KHA NANG HAP PHU Cu"", Nî ^ CUA THAN BA MIA Le Huu Thieng , Hiia Thi Thiiy Trirdng Dgi hoc Sirphgm DHTN TOMTAT Bai bao[.]
Li: Hini Thieng vd Dig Tap chi KHOA HOC & CONG NGHE 86(10): 107- 113 NGHIEN c u t ) KHA NANG HAP PHU Cu"", Ni^^ CUA THAN BA MIA Le Huu Thieng , Hiia Thi Thiiy Trirdng Dgi hoc Sirphgm - DHTN TOMTAT Bai bao thong bao ket qua nghien ciru kha nang hap phu Cu"^ Ni"* dung dich nuoc ciia than ba mia (TBM) Anh huong ciia pH, nong dp cac ion kim loai va thai gian hap phu dugc nghien ciru a nhiet phong (25 ± "C) Nong ciia cac ion Cu'~ Ni'* truac va sau hap phu dugc xac dinh bang phuong phap hap thu nguyen tu nggn lira (F- AAS) Cac ket qua thuc nghiem cho thay pH thich hgp cho sir hap phu Cu"' Ni"' tuong iing la 5,0 va 6,0 Thai gian dat can bang hap phu la 25 phiit cho Cu"' va 30 phiit cho Ni"' Khao sat nong tir 24,286 mg/l d^n 199,324 mg/l d6i vai Cu"' tir 24,856mg/l dgn 198,184 mg/l cho Ni"' theo mo hinh hap phu dang nhiet Langmuir, ket qua nghien ciru cho thay : dung lugng hap phu cu'c dai ciia TBM doi voi Cu"' va Ni"' lan lugt la: 54,054 mg/g va 44.843 mg/g TBM hap phu Cu"' tot ho'n Ni"' Dgng hge hap phu Cu"' va Ni"' ciia TBM tuan theo phuong trinh bac hai bieu kien ciia Lagergren Til' khoa: hdp phu, than bd mia, kim logi ngng dong, niken MO DAU Hien nay, moi truong nuoc o nhieu thj, khu cong nghiep va lang nghe cang bi nhiem boi niioe thai, thai va chat thai ran Vi vay nghien ciru va tim bien phap xir ly nhiem moi truong nuac la can thiet va cap bach Viec sii' dung than ehe tao tir cac phu pham nong nghiep nhu: vo triiu vo lac, vo dira, ba mia de tach loai va thu boi eac kim loai nang tir dung dich nuoc da dugc mgt sci tac gia tren the gioi nghien ciru [1,2,3,4,6,7,8] Cac loai than co kha nang iing dung rat Ion xir ly cac nguon nucic bj nhiem kim loai nang Viet Nam, ba mia la phu pham nong nghiep rat bien Ci bai bao truoc [1], chiing toi da nghien ciru su hap phu Cu"* va Ni'* ciia than vo lac Ket quii cho thiiy kha nang hap phu ciia than vo lac la kha tot Trong bai bao chiing toi trinh bay mot so ket qua nghien ciru kha nang hap phu Cu"* va Ni"* ciia TBM dung djeh nuoc THUC NGHIEM Hoa chat va thiet bj * Hoa chat: H2SO4 98% CuS04.5H:0 NaOH HNO, NiS04.6H:0 nuoc cat hai lan Cac hoa • Tel: 0982 859002 chat diing cho cac thi nghiem deu la loai tinh khiet PA * Thiet bi: - May nghien miiy liie, tii siiy may pH - May quang hiip thu ngu>en tir Thermo (Anh) - Nong dp ciia Cu"*, Ni"" dung djeh tru'cie va sau biip phu dupe xac djnh bang phuong phap hap thu nguyen tir nggn lu'a(F- AAS) Cae dieu kien F-AAS ciia Cu, Ni dupc chi a bang Bang Cac dieu kien F-AAS cua Cu Ni Nguyen to Cu Ni 314,5 232 Khe (nm) 0.5 0,5 Cuimg den HCL(l„,j,x) 75% 75% Chieu cao d(in (mm) 7 Toe dong (ml/phut) 1.1 11 0,05 - 2.5 0.1 - 8,0 Buac song (nm) Khoang tuyen tinh mg/l Che tao TBM tir nguyen lieu ba mia Ba mia sau riia sach dugc cat nho, cho vao nuoc cat dun soi 30 phiit d^ loai bo duong hoa tan sau siiy kho ci 80"C 24 gia Ba mia kho dugc nghi(;n 107 Le Hiru Thieng vd Dtg Tap chi KHOA HOC & CONG NGHE thiinh bcit mjn (nguyen lieu dciu) Trcin nguven lieu voi H2S0,| dac theo ti le 1:1 (nguyen lieu (g) : axit sunfuric (ml)), sau dem nung a 150"C 24 gia Nguyen Ii(§u sau say ducTC rua sach bang nuoc Ciit hai Lin vii ncam tronti duns dich NaHCOi 1% 24 gia de loai bo axit du Lpc lay ba riin va tiep tuc sa_v 150"C cho den kho roi dem nghien nho.rii> thu liiy b(it mjn cci kich Nghien cu'u dong hoc hap phu ciia TBM theo phuo'ng trinh cua Lagergren Phuong trinh dpng hoc hap phu bieu ki^n bac nhat Lasersren [5] ~i7^^'^'^- ~^lddt Dang tich phiin ciia phuong trinh tren la: log(^/ - c / ) = loei:/ thucichatco' |,(mg/g) Me,cai (mg/g) 5.3506 12.024 49.284 Log(q,-i],)=0.7284-0.03I9t 98.836 Log(q,-q,)=0.3597-0.0223t 0.9321 0.0514 2.2893 18.384 48.438 Log(q,-q,)=0.989l-().0307l 0.9592 0.0707 9.7521 8.0224 98.9624 Log(iie-q,)-0.746-().0348l 0.9738 0.0801 5.5702 16.4618 Ni'* 111 Le llini Thieng vd Dtg 86(10): 107- 113 Tap chi KHOA HOC & CONG NGHE Bang Mot sci tham so theo dong hoc hap phu bac cua Cu"' va Ni"* Ion N'ong (mg/l) Phuong trinh R" k2(g.mg''.phut'') q c>|i (mg/g) qp.t;,i(ing/g) 49.284 - =0.3876^0.101 ll 0995^, 0.0263 9.8912 12.024 98.836 ~