phương pháp phân tích tổng acid humic, fulvic trong Đất
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www.themegallery.com TM HIU PHNG PHP PHN TCH TNG S ACID HUMIC, ACID FULVIC TRONG TBI THUYT TRNHLP CDPT14GVHD: Hunh Th Minh HinSVTH: Nguyn Ngc ThanhMSSV: 12091781L/O/G/Owww.themegallery.comMC LCTNG QUAN ACID HUMIC, ACID FULVIC VAI TR, NG DNGTNH HNH SN XUT
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IVPHNG PHP XC NH TNG ACID HUMIC, FULVICwww.themegallery.comC.HU VIC KT HN TRI PHP LUT: HU QU PHP LV QUAN H NHN THNQuan h hn nhn khng c nh nc tha nhnHai bn nam n phi chm dt quan h v chngNu c tranh chp v yu cu gii quyt v nui con V ti sn cc bn phi khi kin thnh mt v kin dn s ring
II.KT HN V HU KT HN TRI PHP LUT
3.Hu qu php l:
I. TNG QUAN ACID HUMIC, ACID FULVICwww.themegallery.com
I. TNG QUAN ACID HUMIC, ACID FULVIC
Cng thc thc nghim l C36H30O15N2xH2O (x=0,15)La loai axit hu c phc tap, cu tao bi nhiu thanh phn hoa hoc, mau nu en.Thanh phn chinh cua axit humic la cac vong cacbon thm co gn cac nhom chc hoat ng nh cac nhom cacboxyl, quinon, methoxyl
Hnh 1. Axit humic in hnh1. Acid Humic: www.themegallery.comTrong t nhin xac ba thc vt c vi sinh vt phn huy tao thanh mt hp cht hu c phc tap la cht mun, mt nhn t quan trong tao nn phi nhiu cua t. Trong cht mun cha nhiu loai axit hu c nh axit humic, axit fulvic, axit fugavic, goi chung la axit mun. Trong s o axit humic chim ti l nhiu nht.
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I. TNG QUAN ACID HUMIC, ACID FULVIC
L cht m axit - baz v lin kt chn lc vi mt s phn t, ion, kim loi v polyme sinh hc.Hoat tinh sinh hoc phu thuc vao ham lng cua cac nhom chc nay va kha nng trao i ion cua chung.Khng tan trong nc chuyn thanh dang mui humat tan c trong nc, goi la s hoat hoa axit humic1. Acid Humic: www.themegallery.comTrong t nhin xac ba thc vt c vi sinh vt phn huy tao thanh mt hp cht hu c phc tap la cht mun, mt nhn t quan trong tao nn phi nhiu cua t. Trong cht mun cha nhiu loai axit hu c nh axit humic, axit fulvic, axit fugavic, goi chung la axit mun. Trong s o axit humic chim ti l nhiu nht.
5 Quan h nhn thn Quan h ti sn
I. TNG QUAN ACID HUMIC, ACID FULVIC
1. Acid Fulvic: L axit mn c mu vng, d tan trong nc, axit hoc kim long.Fulvic l mt dn xut ca suy thoi sinh hc cc cht humic. C th l cc mnh vn ca hp cht humic ln hn hay cc tin cht ca axit humic b oxy ho C trng lng phn t nh hn axit humic, tan trong nc mi pH.
www.themegallery.comC.HU VIC KT HN TRI PHP LUT: HU QU PHP LV QUAN H NHN THNQuan h hn nhn khng c nh nc tha nhnHai bn nam n phi chm dt quan h v chngNu c tranh chp v yu cu gii quyt v nui con V ti sn cc bn phi khi kin thnh mt v kin dn s ring
II.KT HN V HU KT HN TRI PHP LUT
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II. VAI TR, NG DNGwww.themegallery.com
II. VAI TR, NG DNG
1. Vai TrMui axit humic cng c kh nng gi nc rt tt ging nh cht hu c.
Axit humic rt hiu qu trong vic to vng cng vi nhiu cht dinh dng v quan trng hn, trong vic gi nc.Gip b gy mi lin kt gia cc cht dinh dng trong t, lm cho cy trng d hp thu hn.www.themegallery.com1. i vi t ct nh:Trong t t mn, cht hu c c chaAxit humicph ln cc ht ct, lm tng kh nng trao i cation (CEC), v lm tng kh nng gi li cc cht dinh dng v nc ca t.Trong t ct nh, cht dinh dng, c bit nit, thng s c ra tri trong t ct. Tuy nhin, vi khi c cc hot cht cha humic trong phn bn s ngn cn cht dinh dng ngm vo trong nc ngm v thay vo gi cht dinh dng trong t, cung cp cho cy trng.
Axit humic cng gip b gy mi lin kt gia cc cht dinh dng trong t, lm cho cy trng d hp thu hn.( RCOO-H (Axit humic) + Dinh dng = RCOO-Dinh dng (Humate) + H+R cy + RCOO-Dinh dng (Humate) = R cy Dinh dng + RCOOH (Axit humic) )8
II. VAI TR, NG DNG
Ci thin pH ca t.Kich thich s phat trin cua h rTng cng s quang hp cua cy.Tng s trao i cht ca proteinTng cng hot ng ca nhiu enzyme
1. Vai Trwww.themegallery.comCi thin pH ca tHnh bn phi: nh hng ca kh nng trao i cation t vi vic b sung cc axit humic (dinh dng c gi li trong cu trc t giu axit humic)kich thich s phat trin cua h r hp thu cht dinh dng tt hn, cy sinh trng phat trin manh hn.
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II. VAI TR, NG DNG
Lam phn bon ngay, tao thnh cac loai phn hu c khoang, hoc trn vi vi sinh vt co ich tao thanh phn hu c vi sinh. Thuc bao v thc vt
2. ng dng
www.themegallery.comthuc bao v thc vt phong tr bnh cy, giup tng cng sc khang bnh cho cy, phong tr bnh nghet r cho lua va nhiu cy khac, nht l cy cng nghip.
10C.HU VIC KT HN TRI PHP LUT: HU QU PHP LV QUAN H NHN THNQuan h hn nhn khng c nh nc tha nhnHai bn nam n phi chm dt quan h v chngNu c tranh chp v yu cu gii quyt v nui con V ti sn cc bn phi khi kin thnh mt v kin dn s ring
II.KT HN V HU KT HN TRI PHP LUT
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III. TNH HNH SN XUTwww.themegallery.comIII. TNH HNH SN XUTCc m than Bn:Phn b hu khp 3 min: Bc, Trung, Nam ca Vit Nam, nhng ch yu tp trung min Nam Vit Nam, Tng tr lng than bn trong c nc d kin c khong 7 t mt khi.
C nhiu d n u t khai thc than bn m than bn in hnh Thng Lm v sn xut phn khong humic.Cng sut khai thc than bn nguyn : 17.000 tn/nm, sn xut phn khong humic: 20.000 tn/nmHnh. khai thc than bn m than bnwww.themegallery.comy l loi than c tro cao, nhit lng thp, mt s khu vc c th khai thc lm nhin liu, cn li ch yu s c s dng lm phn bn phc v nng nghip. 12C.HU VIC KT HN TRI PHP LUT: HU QU PHP LV QUAN H NHN THNQuan h hn nhn khng c nh nc tha nhnHai bn nam n phi chm dt quan h v chngNu c tranh chp v yu cu gii quyt v nui con V ti sn cc bn phi khi kin thnh mt v kin dn s ring
II.KT HN V HU KT HN TRI PHP LUT
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IV. PHNG PHP XC NH TNG ACID HUMIC, FULVICwww.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
Phm vi p dngTiu chun ny quy nh phng php xc nh axit humic v axit fulvic c trong cc loi phn bn, cht ph thi c cha cht hu c nh: phn hu c, phn hu c vi sinh, hu c sinh hc, phn hu c khong, than bn, phn bn dng humic-fulvic v ph thi hu c t cc ngun khc nhau.www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
Nguyn tcDa theo phng php Walkley-Black Oxy ha cc bon hu c bng dung dch kali bicromat d trong mi trng axit sunfuric, s dng nhit do qu trnh ha tan axit sunfuric m c vo dung dch bicromat, sau chun lng d bicromat bng dung dch st hai, t suy ra hm lng axit humic v axit fulvic.www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
Phng trnh phn ng:Cr2O72- + 3C0 + 16H+ 4Cr3+ + 3CO2 + 8H2O6Fe2+ + Cr2O72- + 14H+ 2Cr3+ + 6Fe3+ + 7H2O
Nguyn tcDa vo tnh cht ha tan ca axit humic v axit fulvic trong mi trng kim, xc nh c tng axit humic v axit fulvic; da vo tnh cht khng ha tan trong mi trng axit ca axit humic tch ring axit humic v xc nh c axit humic, t suy ra hm lng axit fulvic.www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
3. Thit b, dng cBp cch thy.T sy, nhit 700C 100C.pH k.Cn phn tch, chnh xc 0,0002 g.Ry, ng knh l 0,2 mm.Cc chu nhit, dung tch 250 mL
Bnh tam gic chu nhit, dung tch 250 mL.Phu lc, ng knh 8 cm.Giy lc mn.Buret, dung tch 50 mL, chnh xc 0,1 mL.Tm cch nhit.www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
Cn mu5 g 0,001 g Thm 100 ml dung dch hn hp (NaOH -Na4P2O7), lc u trong 1h v qua m
Ly tmLc ly dung dch (dd A)4. Cch Tin Hnh: www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
Xc nh tng axit humic v axit fulvic:
Ht 5ml ddA, thm 10 - 15 ml H2SO4 2N
Thm 20ml K2Cr2O7 1N, thm 40ml H2SO4 , lc nh, yn 30p
Thm 100ml H2O, 10ml H3PO4 , ngui
Sy 70oC/2 ngy
Chun bng Morh 0.5N, dung dch mu xanh nu Thm ch th axit N-phenylanthanilic , dung dch mu hng tmChun tip bng Morh 0.5N, dung dch mu xanh l dng chun 4. Cch Tin Hnh: www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
4. Cch Tin Hnh: Xc nh axit humic:Ht 5ml ddAThm 35 ml H2SO4 2Nun cch thy 70oC/2hLc ly kt ta Ha tan ht kt tabng NaOH 0,05 N nng v chuyn dd vo erlen 250mlThm 10-15ml H2SO4 2NSy 70oC/2 ngyThm 20ml K2Cr2O7 1NThm 40ml H2SO4 , lc nh, yn 30pThm 100ml H2O, 10ml H3PO4 , ngui Ch th mu axit N-phenylanthanilic, chun bng Morh 0.5N (chuyn t tm sang xanh l cy) www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
5. Cng thc tnh ton: www.themegallery.comIV. PHNG PHP XC NH TNG ACID HUMIC, FULVIC
5. Cng thc tnh ton: www.themegallery.comTI LIU THAM KHO[1] L Vn Khoa, Phng php phn tch t nc phn bn cy trng, NXB Gio Dc.[2]http://sachviet.edu.vn/threads/tcvn-8561-2010-phuong-phap-xac-dinh-axit-humic-va-axit-fulvic.13142.
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