Tổng hợp một số dẫn xuất của xenlulozơ và nghiên cứu khả năng tách loại một số ion kim loại nặng từ nước sinh hoạt đề tài NCKH QGTĐ 08 03

DAI HOC QUOC GIA HA NOI TRirONG DAI HOC KHOA HOC TlT NHIEN a KET QUA THLTC HiEN OE TAI NGHIEN CU'U KHOA HOC TRONG DIEM CAP DAI HOC QUOC GIA HA NOI TONG HOP MOT SO DAN XUAT CUA XENLULOZO VA NGHIEN CUU KHA NANG TACH LOAI MOT SO ION KIM LOAI NANG TCT NlTOC SINH HOAT MA SO: QGTD.08.03 Chu nhiem de tai: PGS TS Nguyen Dinh Thanh Cac can bo tham gia: ThS Pham Hong Lan ThS Nguyin Thi Thanh Mai ThS Hoang Kim Van Mot so NCS, HVCH va sinh vien Phong Tong hop hOu ca DA! HOC QUOC C - rlA N(J1 i pr/m HaN6i-2010 BAO CAO TOM TAT Ten 6h tai: TONG HOP MOT SO DAN XUAT CUA XENLULOZO VA NGHIEN CLTU KHA NANG TACH LOAI MOT SO ION KIM LOAI NANG TLT NLTOC SINH HOAT M A S : QGTD.08.03 2- Chu nhiem d^ tai: PGS TS, Nguyin Dmh Thanh Cac can bo tham gia: PGS TS Nguyen Dinh Thanh - Khoa Hoa, tnrang DH KHTN - DHQG Ha ngi ThS Pham H6ng Lan- Khoa Hoa, trucmg DH KHTN - DHQG Ha npi ThS Nguyen Thi Thanh Mai- Khoa Hoa, truong DH KHTN - DHQG Ha npi ThS Hoang Kim Van - Khoa H o i truong DH KHTN - DHQG Ha noi Mot so NCS- HVCH va sinh vien- Khoa Hoa, truong DH KHTN - DHQG Ha noi M u c tieu va noi dung nghien ciiu a Muc tieu a I Dua nhom chuc c6 kha nang tao phirc vao phan tu xenluloza bang cac phan img hoa hoc dac Iruiig cua xenluloza {dupe gpi Id cac phan icng hien tinh xenluloza)^ mot pohme thien nhicn de tao mot loai vat lieu than thien vcri moi truong, c6 the phan huy sinh lioc sau qua trinh su dung thuc te Nguon xenluloza su dung de tai la bong hoac hot gidy a2 Khao sat kha nang lao phuc va kha nang hap phu (hoa hoc va vat li^j cua cac hop chai tong hop dugc vai mot so ion kim loai nang (cation Cd"^ Pb"^^ va/hoac Mn""*" va anion AsO^ va AsO;J') nham dua nhung ket qua nhan dugc vao che tao vat lieu hap phu kim loai nang a3 Nghien cun kha nang ung dung cac san pham bien doi hoa hoc cua xenluloza vao thuc te nham tach mot so ion kim loai nang (cation Cd~ , Pb" va/hoac Mn' va anion AsO^" va AsO^') thuong gap nguon nuac an uong va sinh hoat (6 day goi tat la ngudn nirac sinh hocU) a4 Xay dung qui trinh che tao cot hap phu dung cac vat lieu xenlulozo bien tinh buoc dau nghien cuu che tao Ihiet bi loc nuoc phong thi nghiem de dat duac ham lugng cac ion kim loai nang phu hop vai TCVN b Not dung nghien cuu b l Nghien cuu tong hop \'a chuyen hoa mot so dan xuat este va ete cua xenluloza mot s6 vat lieu xenluloza c6 cau tri'ic mang luoi tren co so dan xuat ete va este cua xenlulozo b2 Cau true cua cac hop chat nhan duac se dugc xac nhan bang cac phuong phap vat ly hien dai (pho hong ngoai, cgng huong tu hat nhan proton va cacbon-13 lugng phan tu trung binh dugc xac dinh bang phuong phap sac ki tham ihau gel) b3 Nghien cuu kha nang tao phuc va hap phu cua dan xuat este va ete cua xenluloza cua \at lieu xenlulozo c6 cau true mang luoi tren co so dan xuat ete va este cua xenluloza tong hgp dugc va kha nang tai sinh cac \ at lieu xenluloza bien tinh b4 Nghien cuu kha nang ung dung cac san pham bien doi hoa hgc cua xenluloza vao thuc te nham tach mot so ion kim loai nang (cation Cd"", Pb^^ va'hoac Mn"* va anion AsOj" \ a AsO^') thuong gap nguon nuac sinh hoat b5 Nghien cuu thiet ke thu nghiem thiet bi Igc nuoc tren co so xenlulozo bien tinh Cac ket qua dat du'O'c * Ket qua ve khoa hgc va kithuat a Da tong hgp dan xuat clo cua xenluloza bang phan ung cua xenluloza vai POCI3 dung moi DMF va chuyen hoa vai dietanolamin va axit p-aminobenzoic Kha nang hap phu cac dan xuat dietanolamin va axit/7-aminobenzoic cua xenluloza vai Pb^' a nong dp 10 " M da dugc khao sat Cau true ciia cac san pham dugc xac nhan bang phuong phap IR, HNMR va phuong phap kinh hien vi dien tu quet SEM b Da thirc hien phan ung bien tinh xenluloza qua NaCMC vai epiclorohydrin va etylendiamin vai cac ty le moi cua NaCMC, epiclorohydrin va etylendiamin Ian lugt la 1:1,5:1,5; 1:2:2; 1:3:3 va 1:4:4 Da tien hanh khao sat kha nang hap phii kim loai chi cua dan xuat amit ciia dietanolamin ciia xenluloza va dan xuat xenlulozo-gepiclorohydrin/etylendiamin o cac nong 6.0 lOOOOppm, 2000ppm lOOOppm, 600ppm, 400ppm va lOOppm Be mat ciia dietanolamin/xenlulozo va NaCMC bien tinh voi epiclorohydrin/etylendiamin voi cac ty le moi khac da dugc xem xet bang phuong phap Sl:M c Da khao sat anh hirong ciia mot so dieu kien phan ung (ti le moi cac chat phan ung, thai gian phan ung) den tinh chat hap phu cua xenlulozo bien tinh CMC-g-ECH va CMC-,^ECH/EDA San pham CMC-g-ECH dugc tong hgp dieu kien khuay trpn tot, nhiet phong gio va ti le moi CMC;ECH=1:3 va san pham CMC-g-ECH/EDA dugc tong hgp bang each dun hoi luu each thiiy a 55-65°C gia voi ti le moi CMC-gECH:EDA=^1:3 deu co kha nang hap phii ion nhat Kha nang hap phu cua cac san pham CMC-^^-ECH/EDA va CMC-g-ECH/EDA da dugc khao sat voi cac dung dich Pb"*, Cd'^ va Mn^^ CO nong dp thay doi cac khoang 500 ppm, 1000 ppm, 1500 ppm, 2000 ppm, 2500 ppm, 3000 ppm va nhan thay rang kha nang hap phu cua xenluloza bien tinh \'6i cac ion kim loai thay doi theo trat tu: Pb"*>Cd"*>Mn"^ d Cac mau CMC-o^-MA da dugc tong hgp bang phan ung ciia carboxymethyl cellulose vai methyl acrylat va dugc chuyen hoa dan xuat amit \'6i dicthanolamin san pham bien tinh CMC-^i,^-MA/DEA cac dieu kien phan iing khac nhau: thai gian phan ung tir gia den 10 gio va ti le CMC-g-MA: DEA thay doi tir 1:6 den 1:12, va da nhan thay rang dieu kien toi uu cho phan img bien tinh la thai gian phan img gio voi ti ie C\IC-g-MA: DEA= 1:10 Kha nang hap phu cua cac mau vat lieu xenluloza bien tinh a dieu kien toi uu doi ximg du'gc khao sat vai cac ion Pb;", Cd""^ va Mn"^ va tuan theo thir tu Pb"%Cd'" Mn"^ e Da tong hgp \i\ khao sat tinh chat hap phu ion kim loai Pb"' \"a Cd""' cua xenluloza bien tmh bang acid citric \'a cho thay rang san pham xenlulozo bien tinh bang acid citric dugc tong htTp dieu kien nhiet 6.0 120°C 12 gia va ti le khoi luong xenluloz(r:acid citric=l:3 co kha nang hap phu Ion nhat Kha nang hap phu cua san pham da duoc khao sat citric=l :3 co kha nang hap phu Ion nhat Kha nang hap phu cua san pham da dugc khao sat vai cac dung dich Pb ^ Cd ^ co nong dp thay doi \a cho tha\' dung lugng hap phu tang theo nong dp ion dung dich hap phu Cau true cua cac san pham xenluloza bien tinh da dugc xac nhan bang IR va be mat cua san pham da dugc xem xet bang phuong phap S1:M f Da tong hgp va khao sat tinh chat hap phu cac anion AsO^ AsO;^' cua xenlulozo bien tinh bang muoi BCDMAB va cho thay rang san pham xenluloza bien tinh dugc tong hgp dieu kien nhiet dp 55°C 3,5 gio va ti le khoi lugng xenluloza:BCDMAB=l :1.25 co kha nang hap phu lan nhat Kha nang hap phu ciia san pham da dugc khao sat \x7i cac dung dich arsenat co nong dp thay doi \'a cho thay dung lugng hap phu can bang tang theo nong ion AsOJ', AsO^'trong dung dich hap phu Cau triic cua cac san pham xenlulozo bien tinh da dugc xac nhan bang IR va be mat cua san pham da dugc xem xet bang phuong phap SEM g Da khao sat cac dieu kien hap phu tinh va kha nang giai hap cac ion Pb~' Cd~' Mn^' cua xenlulozo bien tinh bang axit citric vai cac ion Pb~* Cd"" va Mn"" Ket qua nhan dugc nhu sau: pIIioiLRi "" doi \ a i Pb~\ pHtoi im = doi voi Cd"" pHio, ^ru = 6.6 doi \oi Mn^*; Thoi gian can bang: 80 phiit \ai ion Pb"' 60 phiil \xVi ion Cd"" \ a 30 phiit \6i ion Mn"': Dung lugng hap phu tinh: 500 mg/g \'ai Pb"' 476 mg/g \'ai ion Cd"" \a 227.3 mg/g \ a i ion Mn"' Kha nang giai hap cac ion Pb"\ Cd"*, Mir' ciia xenlulozo citrat: Voi ion Pb"* m,, = 200 f.ig thi hieu suat giai hap la 87.6%; Vai ion Cd"' lUo = 250 ),ig thi hicu sual giai hap la 77.5%; Voi ion Mn"' m,, = 250 f,ig thi hieu suat giai hap la 56.0% h Da khao sal cac dieu kien hap phu tinh va kha nang giai hap cac anion AsO-^"\a AsOj Ket qua nhan dugc nhu sau: pi li.-,, uu = doi \'ai AsO;'- AsO;]"; Thai gian dat can bang hap phu: 45 phiit doi \'ai AsO^" 60 phiit doi \-ai AsO_j"; Dung lugng hap phu tinh: 3-85mg.g \6i AsO; ; 227.55 mg/g voi AsO;;" Kha nang giai hap cac anion AsO;"\a AsO^" cua xenluloza bien tinh: voi AsO;' a lUp ^ 500 |ig thi hieu suat giai hap la 61.6%; AsO^" \'ai o m,, = 500 (.ig thi hieu suat giai hap la 74.7**o i Da nhan thay rang xenlulozo bien tinh (tir bong) \ a i axit citric va BCDMAB thich hgp hon ca de lam \at lieu hap phu cac cation P b ' \ Cd"^ Mn"' \'a anion AsOj" AsO^'tuong irng * Ket qua ling dung thirc te Vai lieu hap phu ion kim loai nang (Pb"" Cd"" Mn"" va AsO: AsO;^") lii' bone (xcnlulo/o) bien tinh bang axil citric va muoi BCDMAB tuong iing * Ket quii ddo tao - Si) cu nhan dugc dao tao khuon kho cua dc tai: Gdp pluhi ddo lao 02 cu- n/u'in .\gu\vn Vict Dung Do Thanh Turen - So thac SI dirge dao lao Irong khuon kho cua dc tai: (jdpphan ddo lao 04 ihac \i Trinh Thi Hd Le Thi Thiiv Hdii iii Hd Lam Nhung Luu Nhu Quynh - So NCS dugc dao tao khuon kho ciia de tai; Gap phan ddo too 04 NCS ve ede van de CO lien quan cua de tdi (ve hod hoc cachohidrcU) NCS Pham Hong Lan (da bao ve cap co so) NCS Nguyen Thi Thanh Mai (da bao \'e cap co so) NCS Hoang Kim Van (dang thuc hien luan an) NCS Le The Hoai (dang thuc hien luan an) \ Trong nam hpc 2009-2010: 04 sinh vien NCKH 04 sinh vien khoa luan 04 HVCIl khoa 2008-2010 * Ket qua cong bo Da dang dugc 04 bai bao a Tctp ehi Hod hoe vd Ung dijng 02 bai bao o' 'Tap chi Hod hoc 03 bao cao khoa hpc o Proceedings of 13'^ International Electronic Conference on Synthetic Organic Chemistry (ECSOC-13) 11/2009 Nguyen Dinh Thanh Luu Nhu Quynh Nguyen Thi Thu Huong Xenlulozo' bien tinh bang (N-bulyLN-cloropropyl-N.N-dimelyl)amonium bromua \a kha nang hap phu ascn cua no Tap ehi Llod hoe vd Ung dung No 19 tr 30-34 (2009) Nguyen Dinh Thanh, Ha Lam Nhung, Nguyen Thi Ciic long hgp cellulose bien linh bang acid citric va sir hap phu ion kim loai nang cua n6 Tcip ehi Hod hoe vd I 'ng dung No 17(101) 33-37(2009) Nguyen Dinh Thanh Le fhi Thuy Ilau, Study on modified reaction of sodium carbox\ lmcth>i cellulose with methyl acrylale Tap ehi Hod hoe 1.47 N.4A 228-233 (2009) Nguvcn Dinh Thanh Trinh Thj I la Nghien ciru long hgp \'a linh chal cua xenlulozo' bien linh voi epiclorohydrin va etylendiamin Tap ehi Hod hoc T 47 N.2A pp.543549 (2009) NguycMi Dinh Thanh Nguyen Viet Dung Mot so dan xual cua xenluloza \6'i dietanolamin \a et\ lendiamin Tap ehi Hod hoe & [ 'ng dung No I I (95) pp 39-42 (2009) Ngu>cn Dinh 'Thanh Do Thanh Tuyen Dan xuat clo cua xenluloza 7'ap chi Tlod hoe c^ Ung dung No 10 (94) pp 40-43 (2009) Nguyen Dinh Thanh Do Thanh Tuyen Some Dcrivati\cs of Cellulose with Dietanolamin and Ethylendiamine 7/'^ International Eleelonie Conference on Synthetic Organic Chemistty (LX'SOC-13) 1-30 November 2009 F002 Nguyen Dinh Thanh Ha Lam Nhung Cellulose modified with citric acid and its absorption of Pb"" and Cd"' ion / i " International Eleelonie Conference on Synlhelie (hganieChemisiry(l-CS()C-}3) 1-30 November 2009 F003 Ngu\cn Dinh Thanh Luu Nhu Quynh (N-butyl-N-chloroprop\l-N.Ndimelh\i)aminonium bromide salt of cellulose: preparation and its absorption of ascnic ions 15'' bUernalional Eleelonie Conterenee on Svnlheiie Organic Chei}}/\lr\ (EC \S(K '-I3), 1-30 No\ember 2009 TT)()4 w Tinh hinh kinh phi cua de tai - Kinh phi dugc cap cho de tai nam la 300 trieu dong chu \eu de mua hoa chat va dung cu tieu hao thue khoan chuyen mon - Kinh phi cap cho nam 2008 la 150 trieu dong (da quyet loan xong) - Kinh phi cap cho nam 2009 la 150 trieu dong (da nop chirng tir de cho qu}el loan) KHOA QUAN LI Chu nhiem de tai Pho Chii nhiem khoa Hoa hoc yducL PCS.TS Trinh Ngoc Chau PGS.TS Nguyin Dmh Thanh TRUONC DAI HOC KHOA HOC TU NHIEN •^""•''t- r^:x •'^o Hijtj TPaana Gc.isM,./^^J>'j,^.,^^;^v^ SUMMARY Tilte: SYNTHESIS OF SOME DERIVATIVES OF CELLUOLOSE AND STUDY ON TTS SEPARATION CAPACITY OF SEVERAL HEAVY METALLIC IONS FROM WATER CODE: QGTD.08.03 Director: Assoc Prof Nguyen Dinh Thanh Members: Assoc Prof Nguyen Dinh Thanh Master of Science Pham Hong Lan Master of Science Nguyen Thi Thanh Mai Master of Science Hoang Kim Van Some Ph.D students, post-graduated students and students Researching attitudes and contents a Researching attitudes al Modification of cellulose using different reagents a2 Investigation of complex and (chemical and physical) absorption capacity of synthesized modified cellulose with some heavy metallic ions (cations: Cd" , Pb" and/or Mn ^ and anions: AsO^", AsO^") a3 Study on application of modified cellulose for separation of some heavy metallic ions (cations: Cd"^, Pb"^ and anions: ASO3", AsO;,') from water a4 Design of absorption column using modified cellulose in lab according to Vietnamese Standard for water b Researching contents bl Study on synthesis and transformation of some ester and ether derivatives from cotton's cellulose, some cellulose materials containing cross-link based on ester and ether cellulose derivatives b2 Structures of products are confirmed by modem spectroscopic methods (IR NMR ) b3 Study on the obtained products' capacity in complex formation and adsorption of heavy metallic ions b4 Estimation of applicable products for separation of some heavy metallic ions (cations Cd"^ Pb"^ and/or Mn~^and anions AsO^' and AsOj") in water b5 Study on design of water-filler instrument based on modified cellulose materials Main results - Results in science and technology: a Cellulose from cotton was modified through reaction with oxyphosphorous chloride in DMF at ISC^C Obtained cellulose chloride was transformed with diethanolamine and sodium p-aminobenzoate in DMF at 25°C The surface of obtained products have been investigated by SEM images b Cellulose from cotton was modified through reaction of NaCMC with diethanolamine and epichlorohydrin-ethylenediamine system in molar ratio of 1:1,5:1,5; 1:2:2; 1:3:3 and 1:4:4 respectively The modification with epichlorohydrin-ethylenediamine system have carried out in two steps: in the first step, NaCMC reacted with epichlorohydrin and in the second step, oxiran-2-ylmethyl carboxymethylcellulose reacted with ethylenediamine gave cellulose-gepichlorohydrin/ethylenediamine The surfaces of obtained products have been investigated by SEM images Their capacity in adsorption of Pb(II) ion (in concentration of 10000 ppm, 2000 ppm, 1000 ppm, 600 ppm, 400 ppm and 100 ppm) have been investigated c The affects of some reaction conditions (molar ratio of reactants, reaction time) to property of modified CMC-^-ECH and CMC-g-ECH/EDA have been estimated It's shown that these affects remarkably infiuenced to the heavy metallic absorption capacity of reaction products Absorption of some ion (such as Pb ^, Cd ^ and Mn ^) has been investigated with different concentrations in range of 500-3000 ppm CMC-^-ECH/EDA adsorbed Pb~^, Cd""^ and Mn""*^ ions well and the absorption capabilities varied in the order: Pb ^> Cd ^> Mn ^ d Samples CMC-^-MA have been synthesized by reaction of carboxymethyl cellulose with methyl acrylate and transformed into amide derivative with diethanolamine (CMC-gMA/DT^A) in different reaction conditions: reaction time changing from hr to 10 hrs and ratios of CMC-^-MA:DEA changing from 1:6 to 1:12 and it's shown that optimum condition was reaction time hrs with ratio of CMC-^-MA:DEA^l :10 Absorption capacity of synthesized samples in optimum condition have been investigated with Pb"^ Cd"^ and Mn"^ ions and indicated that this property obeyd in order Pb^^>Cd"^~Mn"^ e Cellulose was modified with citric acid in high temperature Investigations of its absorption of heavy metal ions (such as Pb"^ and Cd"^) showed that modified cellulose in conditions 120°C and 12 h and in mass ratio of cellulose :citric acid=l:3 had highest absorption capacity Absorption capacity of modified cellulose increased in accordance with increase of concentrations of ions Structure of modified cellulose was confirmed by IR spectra and SEM pictures f Cellulose was modified by reaction with (:V-butyl-;V-chloropropyLiV,7V-dimethyl) ammonium bromide (BCDMAB) The optimum reaction conditions were as follows: temperature 55°C reaction time 3.2 h and mass ratio of ceIlulose:BCDMAB=l:2.5 Equilibrium adsorption capacity of modified cellulose for arsenate ion has been estimated It's shown that this capacity increased with concentrations of arsenate ion Structure of modified cellulose was confirmed by IR and SEM images g Static absorption conditions for modified cellulose as follows: pHopt,mum = (for Pb"") (for Cd"^) 6.6 (for Mn"*): equilibrium time - 80 (for Pb"*) 60 (for Cd"") and 30 (for Mn~^): static absorption capacity - 500 mg/g (for Pb"*) 476 mg/g (for Cd"*) and 227.3 vii mg/g (for Mn'''); deabsorption capacity ^ 87,6% for Pb"^ with mo = 200 fig, 77.5% for Cd"^ with mo = 250 ng, 56,0% for Mn^"" with mo ^ 250 ^g h Static absorption conditions for modified cellulose as follows: pHopumum = (for AsO^, AsO^"); equilibrium time = 45 (for AsOj"), 60 (for AsO^"); static absorption capacity = 3.85 mg/g (for ASO3'), 227.55 mg/g (for AsO^"); deabsorption capacity ^ 61.6% for ASO3" with mo = 500 ^ig, 74,7% for AsO^" with mo = 500 ^g i Cellulose (from cotton) modifying with citric acid and was suitable to make the absorption materials Cd^^, Mn^^ cations and AsO;^", AsOj'anions, respectively laterials for Pb^^, Cd^"^, Results in practical application: Absorption materials for heavy metallic ions (cations Pb , Cd Mn"^ and anions AsOj", AsO^") from modified cotton (cellulose) with citric acid and BCDMAB - Results in training: - Number of Bachelors: 02 J Nguyen Viet Dzung Do Thanh Tuyen - Number of Masters of Science: 04 J Trinh Thi Ha Le Thi Thuy Llau Ha Lam Nhung Luu Nhu Quynh ~ Number of Post-graduated students: 04 Pham Hong Lan Nguyen Thi Thanh Mai Hoang Kim Van Le The Hoai - Publications: Four articles were published in Journal of Chemi.stry and Apply (CSV), two ones in Journal of Chemistry (VAST), three ones in Proceedings of 13^*" Intemational Electronic Conference on Synthetic Organic Chemistry (ECSOC-13) 11/2009 Nguyen Dinh Thanh Luu Nhu Quynh, Nguyen Thi Thu Huong Xenlulozo bien tinh bang (N-bulyl-N-cloropropyl-N,N-dimetyl)amonium bromua va kha nang h^p phu ascn cua no Tcip ehi Hod hoe vd Ifng ditng No 19 tr 30-34 (2009) Nguyen Dinh Thanh Ha Lam Nhung, Nguyen Thi Cue Tdng hop cellulose bien tinh bang acid citric va su hap phu ion kim loai nang cua no Tap ehi Hod hoe vd Ung diwg No 17(101) 33-37(2009) Nguyen Dinh Thanh Le Thi Thuy Hau Study on modified reaction of sodium carboxyimethyl cellulose with methyl acrylate Tap ehi Hod hoe T.47 N.4A 228-233 (2009) viii Nguyen Dinh Thanh, Trinh Thi Ha, Nghien cuu tong hgp va tinh chat cua xenlulozo bien tinh voi epiclorohydrin va etylendiamin Tap chi Hod hoc, T 47 N.2A- pp.543549 (2009) Nguyin Dinh Thanh, Nguyen Viet Dijng, Mot so dan xuat cua xenlulozo vai dietanolamin va etylendiamin, Tap chi Hod hpc Cd"'^-~Mn"\ Da tong hpp va khao sat tfnh chat hap phu ion kim loai Pb"^ \a Cd"^ cua xenluloza bien tinh bang acid citric va cho thay rang san pham xenluloza bien tinh bang acid citric dupe tong hop dieu kien nhiet dp 120°C 12 gid va ti le khoi luang xenlulozo:acid citric^ 1:3 co kha nang hap phu ldn nhat Kha nang hap phu cua san pham da dupe khao sat vdi cac dung djch Pb~ , Cd~^ CO nong dp thay doi va cho thay dung lugng hap phu tang theo nong dp ion dung dich hap phu Cau true cua cac san pham xenluloza bien tinh da dupe xac nhan bang IR va be mat cua san pham da dupe xem xet bang phuang phap SEM Da tong hop va khao sat tinh chat hap phu cac anion AsOr AsO^" cua xenluloza bien tinh bang muoi BCDMAB va cho thay rang san pham xenluloza bien linh dupe long hpp dieu kien nhiet dp 55°C 3.5 gid va ti le khoi lugng xenIuloza:BCDMAB=l :1.25 co kha nang hap phu Ion nhat Kha nang hap phu ciia san pham da dugc khao sat vdi cac dung dich arsenat co nong dp thay doi va cho thay dung lirpng hap phu can bang tang theo nong ion AsO^' AsO^"trong dung dich hap phu Cau true cua cac san pham xenluloza bien tinh da dugc xac nhan bang phd IR \a b^ mat ciia san pham da duoc xem xet bang phuong phap SF.M 7- Da sir dung phuong phap ke hoach hoa thuc nghiem de tim dieu kien toi iru ve thai gian phan img, nhiet phan ung va ti le moi cac chat tham gia phan ung cho cac phan ung bien tinh xemlulozo bang axit cililc va bang BCDMAB Da khao sat cac dieu kien hap phu tmh va kha nang giai hcip cac ion Pb"' Cd"", \ h r " cua xenluloza bi^n tinh b^niz axit citric vdi cac ion Pb"^' Cd^' \a \ln"' Ket qua nhan duoc nhu ^3"- pH.o.iru = do\ vdi W ' pll,o, ru - doi vdi Cd"' pll,., ;, 6.6 doi vai \ln ": I hai gian can bang: 80 phiit vdi ion Pb"\ 60 phiit \di ion Cd"' \a 30 phiil \i'i ion \hv : Dunjj Unrng hap Pl^i tinh: 500 m"/