Nghiên cứu khả năng hấp phụ chì trong nước rỉ rác của mụn dừa biến tính

TRUONG DAI HQC AN GIANG KHOA KY THUAT - CONG NGHE - MOI TRlTCXNG NGUYEN MINH TRI NGHIEN ClTU KHA NANG HAP PHU CHI TRONG NlT6c RIRAC CUA M^N DlTA BIEN TINH TRUCJNG D/^I HQC AN GIANG THUVIEN KHOA LUAN TOT NGHEEP GVPB GVHD TS Nguyen Trung Thanh Ths Bui Thi Mai Phung Ths Phan Triromg Khanh An Giang, 05/2013 LOtt CAM ON Em xin chan tbanh cam cm Ban Giam hieu Traang Dai hpc An Giang, Ban CM nhi^m Khoa Ky thuat - Cong nghe - Moi trudng, Ban Quan ly Khu Thi nghiem Th\rc hanh Truong Dai hpc An Giang cH tao dieu kien cho em Man khoa luan tot nghiep Em xin chan cam on co Bui Thi Mai Phyng da nhipt tinh hudng dan em suot thai gian thuc hien khoa luan Em xin cam an thay Nguyen Trung Thanh, co Nguyen Hong Nh^t va anh Nguyen Van Tuan da ho trp em thdi gian em tien hanh thi nghiem Cam an Y, Giao, Thanh, Dutc, Cam, Binh, cac ban lap, cac ban Hanh trinh xanh An Giang da luon if ben dpng vien, ho trp toi suot thai gian qua./ LongXuyen, 17 thing nam 2013 Nguyln Minh Tri NH^JlN XET CUA GlANG VIEN HtfOOVG DAN LongXuyen, 17 (hang nam 2013 ^" NHAN XET CUA GIANG VIEN PHAN BIEN LongXuyen, ngdy 17 thing nam 2013 NHAN XET CUA GIANG VIEN PHAN BIEN LongXuyen, 17 thdng nam 2013 ABSTRACT Thesis title is: " Study the lead adsorption of denatured coir pith from the seepage water" our experiments were done in environmental lab at An Giang University from January to April 2013 First, coir pith is washed, dried and soaked in sulfuric acid (98%) in hours, coir pith / acid proportion (lg : 7,4g) Then, the coir pith is activated at 150C in hours After the activation, the coir pith was washed in distilled water and soaked in O,1N sodium bicarbonate solution in hours to remove any residual acid Finally, it is cleaned with water and dried at 150C in hours Denatured coir pith is used to carry out the adsorption experiments about lead adsorption of the coir pith in sewage at pH = and Vrr = 50 ml The results identified that the best time of adsorption is 60 minutes and the maximum mass of adsorption is 0,1 g The thesis is also conducted experiments to compare the absorption capacity lead of coir pith material, denatured coir pith and denatured coir pith after desorption in the same conditions (pH = 5, V^ = 50 ml, m = 0,1 g, t = 60 minutes) The results show that the performance of lead adsorption of coir pith material is 68,81%, denatured coir pith is 42,88% and denatured coir pith after desorption is 35,48% Although denatured coir pith is created, but the adsorption just gets a moderate performance because coir pith itself is infected lead Therefore, which materials having lead adsorption with a higher adsorption performance should be chosen to treat the lead in seepage water./ TOM TAT Dl tai "Nghien ciiu kha nang hip phy chi nude ri rac cua myn dira biln tinh" dupe thyc hipn tai phdng Thi nghiem Moi trudng thupc Khu Thi nghiem Thuc hanh, Trudng Dai hpc An Giang tvr thang din thang nam 2013 Myn dira dupe rua sach, phai kho va ngam axit sunfuric (98%), ti le mun dira : axit la (1 g : 7,4 g) gicr Sau do, mun dira dupe hoat hoa d 150C gicr Sau hoat hoa, rua bang nude c^t va ngam NaOH O,1N gid de trung hoa axit Sau do, rua sach bang nude, phai kho ngoai khong va sdy d 150C gid Vat lieu hip phy dupe dung dd tidn hanh cac thi nghiem hip phy chi nude ri rac (d pH = 5, Vn- = 50 ml) K6t qua xac dinh dupe thai gian hip phy tot nhat la 60 phut, khoi lupng vat lieu hap phy tot nhat la 0,1 g DS tai cung tiln hanh thi nghifm so sanh kha nang hip phy chi ciia mun dira nguyen lieu, vat lipu hip phy va vat lieu hip phy sau giai hip d cung dilu kien (pH = 5, Vn = 50 ml, m = 0,1 g, t = 60 phut) Kit qu4 cho thly hieu suit hip phy chi cua mun dira nguyen lieu, vat lieu hap phy va vat lipu hap phy sau giai hip Ian Iupt la 68,81%, 42,88% va 35,48% Mac du da tao dupe vat lipu hip phy nhung hipu suit hip phy chi d muc tmng binh vi ban than myn dira da bi nhiem chi Vi vay, nen lya chpn vat lieu khac cd kha nang hip phy chi vdi hieu suit hap phy cao de xu ly chi nude ri rac./ Khoa Ivan tot nghi?p MUC LUC DANHSACHBANGiv DANHSACHHINHv DANH MUC TIT VIET TATvi CHUONG 1: GlCil THIgU1 CHUONG 2: LU0C KHAO TAl LIEU2 2.1Thanh phan va anh hudng cua nude ri rac d^n moi trudmg2 2.1.1Thanh phdn cua nude ri rac d bai rac Binh Due2 2.1.2Anh hudng cua nude ri rac d^n moi trudng ik, nude, khong khi4 2.2Khai niem kim loai nang va dpc tinh cua chi6 2.2.1Khai niem kim loai nang6 2.2.2Kim lord nang chi7 2.2.3Cacngudnphatsinh chi8 2.2.4Dpc tinh ciia chi9 2.2.5Dau hieu nhilm dOc chi9 2.3Mpt so phuong phap xd ly kim lo^ii nang nude thai10 2.3.1Phuong phap k^t tua10 2.3.2Phuong phap trao ddi ion10 2.3.3Phuong phap hdp php11 2.4Gidi thieu chung vS phuong phap hip phu11 2.4.1Khai nipm Mp php11 2.4.2Ban chat cua sir hap php11 2.4.3Hap phu moi trudng nude12 2.4.4Dong hpc hap phu13 2.5Thanh ph^n, tinh chdt va dng dung cua mun dira13 2.5.1 Tinh chit va phln cua mun dira14 GVHD: Ths Biii ThiMaiPhung Khoa luan tdt nghi$p DHIOMT- Ni 2.5.2 Cong dung cua mun dtra15 2.6Mpt so phuong phap bien tinh vat lieu co nguon goc nhien vat lifu happhu 16 2.6.1Bdi vdi vat lieu la mun dira va ba mia16 2.6.2B6i vdi vat lifu la xo dira, vo trSu va tro trdu16 2.7Cac nghien ciiu \b kha nang hip ph^ kim loai nang cua VLHP co ngudn g6c t\r nhien17 2.8Ly chpn phucmg phap18 CHLTONG 3: PHUtiNG TIEN VA PHI/ONG PHAP NGHIEN CLTU20 3.1D6i tupng nghien ciiu:20 3.2Thcri gian va dia diem nghien ciiu20 3.3Mpc tieu nghiSn ciiu20 3.4Npi dung nghien ciiu20 3.5Phucmg tien va vat lieu nghien ciiu21 3.5.1Vat lieu thi nghiem21 3.5.2Phuong tiSn nghien ciiu21 3.5.3Hoa chat phantich21 3.6Phucmg phap nghi^^ ciiu21 3.6.1Phucmg phap thu, c6 dinh va bao quan nuoc ri rac21 3.6.2Phucmg phap hoat hoa mpn dira bang axit H2SO4 dac22 3.6.3Phuong phap vo co hoa mlu mun dira va xac djnh ham lupng chi mun dira22 3.6.4Phuong phap xac dinh chi nude ri rac23 3.6.5B6 tri thi nghiem23 3.6.6Phuong phap xur ly s6 lifu27 CHUGNG 4: KET QUA THAO LUAN 28 4.1 Nong dp chi mgn dira va nude thai d^u vao28 GVHD: Ths Bui TMMaiPhung Khoa lugn tot nghiep 4.1.1N6ng dp chi mun dira nguyen lipu va san pham sau hoat hoa blng axitH2S04dac28 4.1.2N6ng dp chi nude rirac.28 4.2Trio vat lieu hap phu bang mpn dira29 4.3Anh huong cua thcri gian hip phu va kh6i lupng VLHP d^n dung lupng hdp phu chi nude ri rac30 4.3.1Anh huong cda thiri gian hSp phu d6n nang hip php chi30 4.3.2Anh hudng cda kh6i lupng VLHP d^n kha nang h^p phu chi31 4.4BCha nang hip phu chi cua mpn dira nguyen lifu va VLHP32 4.5Kha nang hip phu chi cua VLHP va VLHP sau giai hip lln 134 CHHC5NG5:KETLUANVAKIENNGH!37 5.1Kltluan,37 5.2 Kiln nghi;37 PHU LUC PHU LUC tAi li$u tham khAo: GVHD: Ths Bui Th\ Mai Phung Khoa ludn tot nghi^p nhieu, day la nhdm quyet dinh kha nang hip phu trao doi ion cua VLHP (Bui Quang Cu vd ctv, 2009) 4.3 Anh huong cua thdi gian hap phu va khoi luQUg VLHP den dung lirg^g hap phu chi nude ri rac 4.3.1 Anh huong cua thoi gian hap phu den kha nang hap phu chi Thi nghi^m duoc tidn hanh it didu ki?n pH = 5, thi tich nude ri rac la 50 ml, ndng chi nude ri ban diu la 0,0171 mg/1, khdi luong VLHP la 0,05 g, thdi gian lie thay doi tir 15, 30 va 60 phut Kit qua duoc trinh bay bang 4.2 nhu sau: Bang 4.2: Ndng va hieu sudt chi dupe hap phu VLHP INI DC1 Cac thong so hap phu Thdi gian (phut) 15' Co (mg/I) Ccb(mg/I) KPH KPH q (mg/g) H(%) _ NT1 15' 0,0171 0,0148 2,2667 13,26 NT2 30' 0,0171 0,0150 2,1000 12,28 NT3 60' 0,0171 0,0117 5,4333 31,77 Ket qua hap phu chi cua VLHP theo thdi gian cho thay, d cung mpt dieu kien ve khoi lupmg VLHP, the tich va d0 pH cua dung dich nude ri rac thi hipu qua hip phu chi nude ri rac cua VLHP tdt nhit la 31,77% d thdi gian hip phu la 60 phut (dung luong hip phu la 5,4333 mg/g) (3 khoang thdi gian diu cua qua trinh hip phu thi hieu suit hip phu khong cao (thdi gian hip phu 15 phut hieu suit hip php la 13,26%, vdi 30 phut hip phu thi hieu suit hip php 12,28%) Nguyen nhan la cac Id xdp cua VLHP cd dang cd chai, kich thudc Id nhd, do qua trinh van chuyln chi tu nude ri rac vao ben vat lieu diln cham, nen d thdi gian diu lupng chi duac hip php thip (3 thdi gian lie 60 phut thi luong chi duoc hip phu chi cao nhit vi vay thdi gian 60 phut duqc chon lam thdi gian tdt nhit cho cac thi nghidm tidp theo GVHD: ThS Bui Th\MaiPhung Khoa ludn tot nghi^p 35 31,77 30 Hie hiiti su phup 25 20 15 13>26 12,28 15 30 • 10 60 Thdi gian (phut) Hinh 4.3: Bieu hi^u sudt hap phu chl cua VLHP theo thdi gian 4.3.2 Anh hirong cua khoi lupng VLHP din kha nang hap phu chl Anh hudng cua kh6i lug^g VLHP din kha nang hip phu chl dupe nghien cuu diiu kien ning dQ chi nude ri rac bing 0,0171 mg/1, thi tich nude ri rac bang 50 ml, pH = 5, thdi gian lac 60 phut va khoi hrpng VLHP thay dii tir 0,05; 0,10; 0,15 g Kit qua dupe trinh bay bang 4.3 sau: Bang 4.3: Nong d^ vd hieu sudt chi hdp phu VLHP sau thai gian Ide 60 phut NT Cac thong so hip php Khoi lupng VLHP (g) Co (mg/1) Ccb (mg/I) q (mg/g) H(%) DC2 0,05 KPH KPH NT4 0,05 0,0171 0,0145 2,5667 15,00 NT5 0,10 0,0171 0,0098 3,6667 42,88 NT6 0,15 0,0171 0,0128 1,4333 25,15 GVHD: ThS Bui Thi Mai Phiing Khoa ludn tot nghi^p d cung dieu kipn \b thdi gian hip phu, the-tich va pH nude ri rac, tang kh6i lupng VLHP tCr 0,05 g len 0,10 g thi dung lupng hap phu tang (do co su can bang nong dp chi nude ri rac vdi ndng dp chi tren bS mat VLHP) nhung tang khoi lupng VLHP len 0,15 g thi dung luQfng hip phu lai giam Nguyen nhan la qua trinh hap php trao doi ion giita VLHP va dung dich nude ri rac thi lupng chi VLHP dupe giai hap ngoai dung dich lam cho lupng ion chi dung dich tang, dan den hieu suat hap phu giam Ngoai ra, cac chat huu ca, cac ion kim lo^i khac ton tai san nude ri rac cd the bam tren b^ mat cua vat lieu, che cac tam hap phu lam giam kha nang hip php chi cua vat lieu Qua kit qua thi nghiem ta thay hieu suit hap phu chi nude ri rac sur dung 0,1 g VLHP la cao nhit (42,88%) 50 45 40 42,88 i" 3s "• a 30 25,15 •% 25 ^| 20 15 15 I" 10 UA 0,05 0,1 0,15 Khoi lupng (g) Hinh 4.4: Biiu dd hieu sudt hdp phu chi cua VLHP theo khdi lupng 4.4 Kha nang hap phu chi cua mun dira nguyen lieu va VLHP * Kha nang hdpphii chi cua mun dita nguyen lieu Thi nghiem khao sat kha nang hip php chi ciia m^n dira nguyen lieu d cung dieu kien ve nong dp chi nude ri rac bang 0,0171 mg/1, the tich nude ri rac bang 50 ml, pH = 5, thai gian lac 60 phut nhung thay doi khoi lupng mun dira nguyen lidu tir 0,05; 0,10; 0,15 g Ket qua dupe trinh bay bang 4.4 sau: GVHD: ThS Bui Thi Mai Phiing Bang 4.4: Khd nang hdpphu chi cua mttn dita nguyen lieu vdi thai gian lac Id 60 phut Khdi luong mun NT dira nguyen lieu (g) DC3 Cac thong so hap phu Co (mg/1) 0,05 Ccb (mg/1) KPH KPH q (mg^g) H (%) _ NT7 0,05 0,0171 0,0107 6,4333 37,62 NT8 0,10 0,0171 0,0053 5,8833 68,81 NT9 0,15 0,0171 0,0084 2,9000 50,88 Bans 4 cho thav dune uome han oh u chi trone nmre clt d DC3 a = cd nghTa la ban than nude cdt khong bi nhidm chi Khi thay ddi nude cdt bdng nude ri rac thi dung krgng hdp phu chi cua mun dira nguyen lieu lai khac Khi tang khdi hrong myn dira nguyen lieu tir 0,05 g len 0,10 g thi dung hxqmg hdp phu tSng nhung tang khdi hryng mun dira nguyen lieu len 0,15 g thi dung hrpng hdp phu lai giam Din den hieu suit hdp phu chi nude ri rac sir dung 0,1 g mun dtra nguyen lifu la cao nhat, tiep ddn 0,15 g va sau cung la 0,05 g, hieu sudt hdp phy tuong umg la 68,81%, 50,88% va 37,62% Dung luomg hdp phu cua mun dira nguyen lieu d NT8 la 5,8833 mg/g, co nghTa la sd dung g mpn dira nguyen lieu co thd hdp phu dugrc 5,8833 mg chi nude ri rac * So sdnh hi^u sudt hdpphu chi cua VLHP va mtin dita nguyen lieu Tir Hinh 4.5 cho thdy, ca nguyen lieu va VLHP ddu co kha nang xur ly chi nude ri rac Tuy nhien, d cung mpt dieu kien ve thdi gian hap php, khoi luong mau, pH va the tich cua dung dich nude ri rac thi kha nang hap phu chi cua VLHP (42,88%) thdp horn so vdi mun dira nguyen lieu (68,81%) Nguyen nhan la mun dira nguyen lieu co cau true gom nhieu 16 xop, chua cac tam hap phu, mun dira cd phdn hda hoc gdm cac polymer (celluloses, hemicelluloses, pectin, lignin va protein) cd the hap phu nhieu loai chat tan, dac biet la ion kim loai hda tri nhu chi Cac hop chat polyphenol (tannin, lignin) la nhung phan ho^t dong cd the hap phu chi Ngoai qua trinh hoat hda mpn dira bang axit sunfuric dac cd thd da pha vd cau true bd mat cua myn dira, lam cho dien tieh bd miit cua VLHP nhd horn so vdi mun dira nguyen lieu ban dlu GVHD: ThS Bui Thi Mai Phung Khda ludn tot nghiep (can co them nhttng nghien ciiu ve dien tfch be mt rieng ciia VLHP sau hoat hoa va mqn dtra nguyen lieu di co thi so sanh di^n tfch bh mat rieng cua loai vatli?u) 80 ^Nguyen lieu 68,81 70 aa, a ^VLHP 60 50,88 50 40 42.88 37.62 30 25.15 20 15 10 0,050,1 0,15 Khoi lu^ng (g) Hihh 4.5: Bieu hiu sudt hdpphu'chi cua nguyen lieu va VLHP 4.5 Kha nang hap phu chi cua VLHP va VLHP sau giai hap Ian Sau tiin hanh giai hip VLHP lin bang dd HC1 0,1 N, kit qua du^c trinh bay cr bang 4.5 sau: Bang 4.5: KM ndng hdp phu chi cua VLHP sau giai hdp Idn Khoi luong NT Cac thong so hap phu VLHP sau giai hip (g) Co(mg/1) Ccb(mg/1) q (mg/g) H (%) NT100,05 0,01710,0187 NTH0,10 0,01710,01103,033335,48 NT120,15 0,01710,01321,300022,81 GVHD: ThS Bui ThiMaiPhitng Khoa lugn tot nghiep Tit bang 4.5 cho thiy, VLHP sau hip phu chl nude ri rac (lin 1), co the tai su dung lai de tiip tiic hip phu chi thong, qua viec giM hip bang HC1 0,1 N Tuy nhien, hieu suit hip ph\i chl d cac nghiem thiic NT10, NT11 va NT12 deu giam so vdi hap phu lin diu co cung kh6i luang (Hinh 4.6) Hinh 4.6 cho thiy, sii dgng 0,1 g VLHP sau giai hip lin di tiip tuc hap phu chi nude ri thi thip hern khoang 7,4% so vdi sii dung VLHP ban diu (khong giai hip) d cung khoi luang Hieu suit hip phg chi d NT11 la 35,48% Kit qua cho thiy d NT10 (sti dung 0,05 g VLHP) sau giai hap Ian thi khong co kha nang hip phu them chi nude ri Nguyen nhan cd the la thai gian giai hip chua dat din din lugrng chl bi hip phu d thi nghiem trudc mun dua chua duq^c giai hip nen cho vao nude ri di hip phu thi luang chi VLHP duac giai hip ngoai lam lugng chi nude ri tang len Nguyen nhan VLHP sau giii hip lin cd thi tiip tuc hip phu dupe chi nude ri la qua trinh giai hip blng dung dich axit HC1 0,1 N cac ion chi bi hip phu tren bi m^t cua VLHP duac tach khdi bi mat cua vat lieu, lam thoang bi mat VLHP, phpc hii hoat dong cua cac trung tarn hip phu Do do, vat lieu sau giai hip van cd kha nang hip phu chi ha(% ) phpu Hie it suu 50 45 40 35 30 25 20 15 i^VLHP 42,88 :* VLHP sau giai hip 15.48 25.15 ^22,81 15 10 0 0,05 - 0,1 0,15 Khoi lin^ng (g) Hinh 4.6: Bieu kha nang hap phu chi cua VLHP vd VLHP sau giai hap Ian GVHD: ThS Bui Thi Mai Phung Khoa luqm tot nghiep * NltQn xet chung Tir ket qua thi nghiem va cho thay, a pH = sir dung khoi lupng mun dira hoat hda la 0,1 g va thdi gian hap phu la 60 phut thi se cho hieu suat hap phu chi cao han so vdi cac thi nghim thay d6i vd thai gian (15 va 30 phut) va trpng lupng mun dira biin tinh (0,05 g va 0,15 g) lai Kit qua ngirac vai kit qua nghien cuu cua tac gia Bui Quang Cu va cpng tac vien la tang kh6i hrgmg VLHP thi dung luang hdp phu ion Pb2+ khong tang Nguyen nhan co Xhk la ban than mun dira co chl (khong co d6ng) nen kha nang hap phu chi cua mun dira thdp Nhan th^y d cung mpt di^u kien vh pH, th^ tich dung dich nude ri rac, kh6i luang vat li^u va thcri gian lac thi mun dira nguyen lieu, VLHP va VLHP sau giai hap Ian d6u co kha nang h^p phu chi nude ri rac d cac muc khac nhau: Mun dira nguyen lifu co dien tich bd mat ldn, cd c^u true gdm nhidu 16 x6p, chua cac tarn h^p phu, mpn dira cd phiin hoa hpc g6m cac polymer (celluloses, hemicelluloses, pectin, lignin va protein) cd th6 hap phu nhieu loai chat tan, dac bi^t la ion kim loai hoa tri nhu chi Cac hap chat polyphenol (tannin, lignin) la nhung phSn ho^t dpng cd the hip phu chi (Li Thanh Hung va ctv, 2008) Vdi cdu true va ph^n nhu th mun dira nguyen lieu cd kha nang hip phu chi t6t han nhieu han so vdi VLHP khoang 25,93% VLHP sau hap php chi Ian cd the dupe giai hap bang dung dich axit HC1 O,1N, VLHP sau giai hip cd thi tiip tuc dupe dung di xu ly chi nude ri rac va cho hieu suit hip phu thip hem so vdi VLHP ban diu la 7,4% GVHD: ThS Bui Th\MaiPhung Khoa luan tdt nghi^p CHI/GNG KET LU^N VA KIEN NGHJ 5.1Kit luan Sau tiin hanh cac thi nghiem hip phu chi bSng each su dung mpn dda nguyen li^u, mun dita bien tinh bang axit sunfuric dac va thi nghiem giai hip, chung toi rut mot so ket luan nhu sau: Da tao dugfc vat lieu hap phu co mau den, kich thudc hat nho gpi la than Mun dira nguyen lieu da bi nhiim chl vdi ham lugrng 0,128 mg/kg va vilt lieu hip phu lai co ham lupng chi (0,1917 mg/kg) cao hem so vai mun dira nguyen lieu Ci pH = 5, sue dung 0,1 g VLHP ngam nude ri rac co n6ng la 0,0171 mg/1 thai gian 60 phut thi se cho hieu suit hip ph^ chi cao hem so vdi cac thi nghiem thay ddi vi thai gian va trpng luong VLHP lai Ca mun dira nguyen lieu, VLHP va VLHP sau giai hip lin diu co kha nang hap ph^ chl nude ri rac Hifu suat hap php chl cua VLHP thap hem so vdi m^n dira nguyen lieu khoang 25,93% Hieu suit hip phu chi cua VLHP cao horn so vdi VLHP sau giai hip lin khoang 7,4% 5.2Kien nghi Can cd nhftng nghien cdu vi ciu tnic (bi mat rieng) va phin (thanh phin cac polymer) cua mun dira nguyen lieu di hieu ro hem nguyen nhan giup mun dira nguyen lieu cd kha nang hap phu chi Can nghien cdu th^m vi phin cua nude ri rac, s^ canh tranh gida cac ion qua trinh hip php Nen lira chon vat lif u hap php khac cd kha nang xu ly chi nude ri rac vi ban than mun dda da bi nhiem chi Nen tiin hanh cac thi nghi^m tren dung dich chuin cua chi trudc dng dyng vao xu ly nude thai/ GVHD: ThS Bui Th}MaiPhVng Lap dirong chuan ciia chi Kt qua lap duong chuan cua chi dupe trhih bay bang sau: Bang 1: So li^u xdy dung duong chuan xdc dinh ndng cua chi C(mg^) 0,0 0,025 0,05 0,1 A 150,92 185,79 240,48 319,42 Trong do: A - mat dp quang ? D6h4pthu(A) Linear (Dp 350 0,12 Nong (mg/I) Hinh 1: Duong chuan xdc dinh ndng chi Tir ket qua tren ta co dupe phucmg trinh dubng chuan xac dinh nong dp cua chi la y = 1730,2x + 148,01 voi R2 = 0,9962 PHU LUC TIEU CHUAN VE^T NAM TCVN 4622:1994 SCA BOT VA SU"A BAC CO Bl/CiNG - PHl/ONG PHAP VO CO HOA MAU BE XAC BINH CHI (PB) VA ASEN (AS) Powder and sweetened condensed milk - Method of mineralisation of sample for the determination of lead and arsenic contents Loi noi dan TCVN 4622 - 1994 dupe bien soan dua tren ca sd cac ti6u chuan sau day: AOAC 1984 25 ST SEV 4877 - 84 TCVN 4622 - 1994 thay the cho 4622 - 88 TCVN 4622 -1994 bg mon hoa phSn tich, Truang Bai hoc t6ng hgp Ha Npi bien soan, T6ng cue Tieu chuan - Bo lucmg - Chit lugng de nghj va dupe Bo Khoa hgc, Cong nghe va Moi truong ban hanh Tieu chuan quy dinh phirong phap vo ca hoa mau de xac dinh Pb va As sua Tuy theo muc dich co the chpn mpt hai phuang phap dupe neu duai dy Tieu chuin co th6 ap dung de vo ca hoa mau xac dinh cac kim loai nang khac cac san pham (trtr Hg va Mg) Vo ca hoa mau bing phuong phap dot (phuang phap tai) 1.1.Npi dung phuang phap Bot mau co chdt trp dot Mg (NO3)2 d nhipt dp 450 10C Sau hoa tan tro b5ng dung dich HC1 1.2.Dung cu va hoa chat -L6 nung dipn co the kh6ng chg nhiet dp 450 10C -Bep dien bpc kin co dieu chinh nhiet dp -Can ph^n tich tai trpng 200g, chinh xac d^i 0,000 lg -Binh hilt am co H2SO4 dac -Bat platin, hoac chen thach anh hoac chen su chiu nhipt, dung tich 50 100ml -Magie nitrat Mg(NO3)2 TKPT, dung dich 50g/lit -Axit clohidric HC1, TKPT dung dich 1:4 -Axit nitric HNO3 TKPT, dung dich co d = l,4g/ml -Nude cat lin theo TCVN 2117 - 77 hoac nude cd dp tinh khidt tuong duang -GiSy lpc dinh lupng (khong tro) -Dua thuy tinh dudng kinh mm, dai 15 cm cd dau dupe lam trdn bang den xi 1.3 Cach thuc hifn Can vao chen de nung khoang 25g mlu (chinh xac d6n 0,0 lg), them vao 5ml dung djch Mg(NC>3)2, neu la sua hot them nude cat vira du tham udt hot, trpn deu bang dua thuy tinh, sau trpn deu, lau dua bang mot mia td giay lpc khong tro, cho giay lau vao chen, lam mpt chup hinh ndn bang giay lpc, cd mot 16 nhd d giOa - 4mm Day chup vao chen, dat chen len bdp dien, dun nhe cho d6n kh6, sau tang nhiet dp len dn khoang 300C cho dn khi ngirng thoat (mlu hoa den, nhung nhdt thi6t khong dupe ben Ida) Chuyln chen vao 16 dien ngupi, dat kh6ng che nhiet dp 450 nhiet dp 450 10C Bat dien cho nhiet dp tang td td Giu mlu d 10C gid, cd 15 phut md cda Id mot Ian, sau tat Id, de each dem, lay mau khoi Id, tro phai trang hoan toan Th6m vao chen 10ml HC1 : 4, - gipt dung dich HNO3, dun nhe tren b6p dipn (khong de soi) de hda tan tro, chuyen h6t dung dich vao binh dinh mdc 25 ml, rda chen l^n m6i Ian bang - ml nude c^t, chuyen ht nude rda vao binh dinh mdc, lam ngupi, them nude den vach Dung dich dung de xac dinh Pb va As (cung nhu mpt so nguyen to khac) Phinrng phap vo cp hda theo loi udt binh Kendan 2.1.Noi dung phuong phap V6 co hoa mau b^ng h6n hpp axit nitric, sunfuric, pecloric va hydropeoxit dam dac binh Kendan, dun ndng cho d6n phan hdy hoan toan cac chat hduco 2.2.Dung cu va hda chat -Binh Kendan 300 ml -Can phan tich tai 200g, chinh xac ddn 0,0001g -Bep dien cd dieu chinh nhiet dp -Bi thuy tinh - mm -Axit nitric HNO3 TKHH, d = l,4g/ml -Axit pecloric HC104 TKPT, dam dac 70% -Axit sunfiiric H2SO4 TKPT, d = l,84g/ml -Hidropedxit H2O2 TKPT, dung djch dam dac (tren 30%) -Nude cSt lin theo TCVN 2117-77 hoac nude co tinh khiit tuang duang 2.3.Cach thuc hien Can true tiep vao binh Kendan khoang 25 gam sua (chinh xac den 0,0 lg) cho vao - vien bi thuy tinh Them tirng phin 20ml dung dich HNO3 vao binh, dd lang theo co di ldi keo cac phin sua dinh a cd xudng dudi day binh, dun nhe cho din hit khdi nau, lap lai thao tac tren -2 lin cho din dupe hn hop dong nhit, cd miu nau slm, lam ngudi, thdm 20ml HNO3, 2,0ml H2SO4, 2,0 ml HCIO4, rdi dun nhe cin than cho dSn cd khdi tr^ng thoat ra, lam ngupi, neu hon hop chua het mau thi them tirng phan nhd H2O2 (khoang ml moi Ian) roi tiep tuc dun den hon hpp khong cd mau Dun can cho den the tich chat long khoang - 4ml, lam ngupi han hdn hpp, them 10ml nude cat, lie deu toan bp dung dich, dun nhe cho tan kgt tua (n^u khong tan hit thi lpc ndng bang giay lpc xdp vao binh dinh muc 25ml, rita binh va giiy lpc vai Ian blng nude cit) ChuySn toan bp dung dich vao binh dinh mute dung tich 25ml, trang binh Kendan lin mdi Ian - ml nude cit, gpp cd vao binh dinh muc, lam ngupi din nhipt dp phdng, them nude cho den vach Dung dich dung de xac dinh Pb va As 2.4.Chuan bi mau trang Lay vao binh Kendan mot lupng cac hda chat giong nhu lupng cac chat da dung vo ca hda mau sua, dun can cho den cd khdi trang thoat ra, va the tich chit long lai khoang - ml Lam ngupi hin, them 10ml nude cit chuyin vao binh dinh muc 25ml, trang binh Kendan lin, moi lin - ml nude cdt Lam ngupi, them nude cat den vach Dung dich dung de lam mau trang Lupng Pb hoac As cd mau trang khong dupe vupt qua l|ig/25 ml dung dich mau trang./ TAI LIEU THAM KHAO Bui Quang Cy, Tran Minh Biic, Tran Thi Xuan Tinh, Bui Quang Minh, Duong Thuy Duong (2009) Bin tinh myn dira nhiet dp thap 16m vat lipu hip phy, ling dyng loai bo ion Cu2+trong nude Tap chi Khoa hpc va Cong nghp 47 (2) 91-100 Dinh Xuan Thing va Nguyen Dinh Tuan 2010 Cong nghg xii ly chat thai ran NXB Dai hpc Qudc gia TP.Ho Chi Minh Hoang Vu 2009 Cong dung cua myn dira.[http://www.dost-bentre.gov.vn/chuvenmuc/ung-dung-klioa-hoc-cong-nghe/1607-cong-dng-ca-mn-da.htmll Ngay tray cap 03/01/2013 H6 Si Trfng 2005 Co so hda hpc gd va xenlule, tap NXB Khoa hpc va Ky thuat Ha Npi V Kirabakaran, V Sivaramakrishnan, R Nalini, T.Sekar, M Premalatha, P.Subramnian 2009 A review on gasification of biomass Kim Ngan 2012 NghS trdng dira d Bgn Tre, mot sic thai van minh nong nghiep dac biet rhttp://www.bentre.gov.vn/drp/portal/lehoidua/v-l/t-3/n/1521 Ngay tray cap 03/01/2013 Le Van Cat 2002 Hap phu va trao doi ion k^ thuat xu ly nude va nude thai NXB ThdngkeHaNpi Le Thanh Hung, Pham Thanh Quan, Le Minh Tarn va Nguyln Xuan Thorn (2008) Nghien ciiu kha nang hap php va trao doi ion cua cua xo dira va vo triu bien tinh Tap chi phat triln Khoa hpc va Cong nghe 11 (08) Le Ngpc Hang 2009 Nghien cuu ling dpng tro trau tir 16 dot gach thii cong lam chat hap php metyl da cam Khoa luan Tot nghiep Nganh Ky thuat Moi trud'ng Trudng Dai hpc An Giang Le Minh Thanh 2007 Luan van Thac sy nganh Ky thuat moi tmong - Nghi^n ciiu xu ly nude rac bing cong nghe lpc ky dinh bam mat d cao Truorng Dpi hpc Bach khoa TP.H6 Chi Minh Le Xuan Thii 2009 Nghien ciiu chidt - trie quang phiic Dalgan he l-(2Pyridilazo)-2-Naphtol (Pan)- Pb(II) ccl3cooh va ling dung phan tich Lupn van Thac si Truo^g Dai hpc Thai Nguyen Nguyln Huy Ba Cudng 2010 Bpc ti'nh ciia kim loai [http://tapchithucpham.coin/?p=11591 Ngay cong b6 11/07/2010 Nguyln Nha Duy 2009 Phircmg phap xii ly nude ri rac tai bai chon lap bang th\ic vat.rhttp://www.monre.gov.vn1 Ngay cong bo 03/06/2009 Nguyen Van Thanh 2012 Luan van thac si hoa hQC Nghien cuu bien ti'nh xa dira tam quan de ung dpng lam vat lipu hap php mpt so hqp chat huu co nude Trudng Bai hpc Ba Nlng Nguyen Van Phudc 2011 Quan ly va xu ly chit thai rln NXB Bai hpc Qudc gia TP.HCM Nguyln Van Phudc 2010 Ky thuat xur ly chit thM cong nghiep NXB Bai hpc qu6c gia TP H6 Chi Minh Mykola, T K., L A Kupchik, and B K Veisoc, (2009), Evaluation of pectin binding of heavy metal ions in aqueous solutions Chemosphere, 38(11): 2591-2596 Pham Nguyen Chuong va ctv 2002 Hoa ky thuit Ha Npi NXB Khoa hpc va Ky thuat HaNpi Phan Thi Thu H5ng, 2008 Nghien cuu ham lupng nitrat va kim loai nang dit, nude, rau va mpt so bipn phap nham han che s\r tich luy cua chung rau tai Thai Nguyen Trudng Bai hpc Thai Nguyen Phung Thi Kim Thanh 2011 Luin van tot nghipp Nghien cfru kha nang hip php mpt s6 ion kim loai nang bang ba mia sau da biln tinh va thu nghipm xu ly moi trudng Tran Tii Hilu 2003 Phan tich trie quang phd hip thu UV-Vis NXB Bai hpc Qu6c gia Ha Npi Tran Van Nhan, Ho Thi Nga 2005 Giao trinh Cong ngh? xu ly nude thai NXB Khoa hpc va Ky thuat Ha N$i Trung tam Quan trie va Ky thuat Tai nguyen - Moi trudng An Giang 2012 Thong s6 kim loai nang nude ri rac nam 2009 -2011 Trung tam chong dpc Benh vi|n B^ch Mai Chi va cac anh hudng tdi sue khde rhttp://www.chongdoc.org.vn/Tin-tuc/Menu/tabid/178/menuid/149/language/viVN/Befault.aspx1 Ngay truy cap :27/04/2013 Reddad, Z., C Gerente, Y Andres, M.C Ralet, J F Thibault, and P L Cloirec, (2002), Ni(II) and Cu(II) binding properties of native and modified sugar beet pulp Carbohydrate Polymers 49: 23-31 Luang Thi Loan 2009 Xay dung quy trinh xac dinh dong, chi, cadimi mau huygt bang phuang phap quang plasma ghep noi khoi phd (ICP - MS) Luan van Thac sy khoa hpc Chuyen nganh Hoa phan tich Dai hoc Khoa hoc Tu nhien TP.H6 Chi Minh) Nguyln Trin Thien BChanh 2006 Tai lieu giang day Ky thuat va quan ly chat thai rfin Truang Dai hpc An Giang Pham Hong Nhat 2001 Luan van Thac sy nganh Ky thuat moi truang - Nghien ciiu t6c dp phan huy rac sinh ho^t d TPHCM va d lien quan dSn moi trudng cua cap bai rac Vien tai nguyen va moi trudng TP.H6 Chi Minh ... 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