XC NH DUNG LNG TRAO I ION CA NHA1.PHUNG PHP TRAO I ION a,gii thiu Phng php trao i ion c s dng rng ri trong cc qu trnh x l nc thi cng nh nc cpTrong x l nc cp, phng php trao i ion thng c s dng kh cc mui, kh cng, kh khong, kh nitrat, kh mu, kh kim loi v cc ion kim loi nng v cc ion kim loi khc c trong ncTrong x l nc thi, phng php trao i ion c s dng loi ra khi nc cc kim loi (km, ng, crom, nikel, ch, thu ngn, cadimi, vanadi, mangan,),cc hp cht ca asen, photpho, xianua v cc cht phng x.b, C s ca phng php

L qu trnh trao i ion da trn s tng tc ho hc gia ion trong pha lng v ion trong pha rn .Trao i ion l mt qu trnh gm cc phn ng ho hc i ch (phn ng th ) gia cc ion trong pha lng v cc ion trong pha rn (l nha trao i). S u tin hp thu ca nha trao i dnh cho cc ion trong pha lng nh cc ion trong pha lng d dng th ch cc ion c trn khung mang ca nha trao i. Qu trnh ny ph thuc vo tng loi nha trao i v cc loi ion khc nhau .C hai phng php s dng trao i ion l trao i ion vi lp nha chuyn ng , vn hnh v ti sinh lin tc ; v trao i ion vi lp nha trao i ng yn ,vn hnh v ti sinh gin on. Trong trao i ion vi lp nha tnh l ph bin.c,nha trao i ionC hai loinha trao i ionchnh, l nha Cation nha trao i ion dngthng gp l Ca2+, Mg2+, Fe2+, H+, v nha Anion nha trao i ion mbao gm Cl-, SO42-, OH-.Theo ha hc, c hai loi nha u thuc v mt nhm hp cht gi l polymer, l nhng phn t cc ln hnh thnh bi s kt hp nhiu phn t ca mt hoc hai hp cht vi cu trc lp i lp li to thnh mt chui di.Theo l hc,nha trao i ionl cc dng ht nh, c gi l ht nha vi ng knh trung bnh khong 0.5mm. Loi nha ny c m, trong sut mu h phch, khng tan trong nc, acid v bazo.

ng dng :trong x l lm mm nc2.Thc hnhphn ny c trong t photo rui nha