W(xu)ʹUˮгܽB(ti)ؽD(zhun)׃?yu)鲻ˮؽٻķкͳȡ?/span>
ںؽٵďUˮмAM(jn)кͷ(yng)ʹؽɲˮĚʽԷxкͳ(jin)Σdzõ̎Uˮ(sh)`CڲҪעc(din)[1](1)кͳUˮpHֵҪк̎ſŷ;(2)UˮгжNؽٹ棬(dng)UˮкZnPbSnAlȃԽٕr(sh)pHֵƫߣܽAҪ(yn)pHֵ(sh)зֶγ;(3)UˮЩx磺uֲ|(zh)пcؽγɽj(lu)Ҫк֮ǰ轛(jng)^(gu)A(y)̎;(4)ЩwС׳toɡ
턩ʹUˮؽxȥķcкͳă(yu)c(din)ǣؽܽȱܽȸҷ(yng)pHֵ7—9֮g̎ďUˮһ㲻кȱc(din)[2]wСγzw;턩ˮКwa(chn)Ⱦ˷ֹȾ(wn)}Ӣ(gu)W(xu)о˸M(jn)̎ďUˮxԵļxӺһؽx(ԓؽٵxƽȱҪȥؽȾ|(zh)ƽȸ)ڼM(jn)ȥؽٵȏUˮеؽٵܽ⣬@ӏUˮԭеؽxӾͱM(jn)ȥؽxȷx(li)ͬr(sh)ֹкwɺxӚ(wn)}
像UˮеCrҪCr6+xΑB(ti)UˮͶ߀ԭCr6+߀ԭCr3+ͶʯһNaOHa(chn)Cr(OH)3xȥW(xu)߀ԭ像Uˮ瑪(yng)õg(sh)֮һ҇(gu)Vđ(yng)ãԭ(jin)ܴܳˮߝȏUˮ_(j)Ͷ߀ԭIJͬɷ֞FeSO4NaHSO3FмSO2(yng)ûW(xu)߀ԭ̎CrUˮAr(sh)һʯUࣻNaOHtˎM(fi)øߣ̎ɱ@ǻW(xu)߀ԭȱc(din)
Fwg(sh)Ǹ(j)a(chn)Fwԭl(f)չ(li)ġںCrUˮм^(gu)FeSO4ʹCr6+߀ԭCr3+, Fe2+Fe3+{(dio)(ji)pHֵ8ʹFexӺCrxӮa(chn)ͨ՚┇貢ﲻ෴(yng)γtFwˇgЪʽBm(x)ʽFwγɵW(xu)(wn)ԸߣڹҺxÓˮFw̎CrUˮemںؽxӵ僻ϏUˮ҇(gu)(yng)Fwѽ(jng)Ўʮvʷ̎ďUˮ_(d)ŷŘ(bio)(zhn)ڇ(gu)(ni)價I(y)Б(yng)^
FwO(sh)了(jin)ΡͶY(jin)a(chn)Ⱦȃ(yu)c(din)γFw^(gu)Ҫӟ(s70z϶)ܺ^ߣ̎}ȸв̎Hgͽj(lu)Uˮȱc(din)
늽ⷨ̎CrUˮ҇(gu)ѽ(jng)жʮĚvʷȥʸߡo(w)Ⱦؽٿɻõȃ(yu)c(din)s30NUˮҺеĽxӿM(jn)늳e늽ⷨһN^̎g(sh)ܜpܻCuAgCdȽ٣ё(yng)ڏUˮ^(gu)늽ⷨɱ^һ㽛(jng)s늽⽛(jng)(j)Ч^á
܄ȡ[4]Ƿx̓|(zh)õķҺһҺ|Bm(x)xЧ^áʹ@Nr(sh)Ҫx^xԵȡUˮؽһ(yng)xӻxʽڣԗlcȡl(f)j(lu)Ϸ(yng)ˮ౻ȡЙC(j)ȻډAԗl±ȡˮʹ܄ѭh(hun)@Ҫȡr(sh)עxˮMȡ^(yu)ԽȻ܄ȡ^(gu)еʧ^(gu)ԴĴʹ@Nһԣ(yng)ܴܵ
Ī(d)ؽY(ji)(gu)ȥؽxӵһNЧ̎ؽ?gu)Uˮлֲ̿ᡢʯǘ(sh)֬ȡ̿b了(jin)ڏUˮБ(yng)ÏV̿Чʵ̎ˮ|(zh)y_(d)Ҫһ像UˮA(y)ֲ̎|(zh)DZ^r(ji)Ѹֲɸֲ(sh)֬̎CrNiUˮгɹ(jng)(yn)P(gun)оǼؽxӵǘ(sh)֬(lin)؏(f)ʹ10](mi)@[5]øԵĺʯؽ?gu)Uˮ(du)Pb2+Hg2+Cd2+кܺõ̎Uˮؽٺ@ˮCŷŘ(bio)(zhn)īI(xin)(bo)ÓʯҲһNõճVXÓʯԗl(du)Cr6+ȥ_(d)99%ˮCr6+ڇ(gu)ŷŘ(bio)(zhn)Ќ(sh)H(yng)ǰ
Ĥxø߷еxԁ(li)M(jn)|(zh)xļg(sh)늝BBĤȡ^(gu)Vȡ늝B̎價I(y)Uˮ̎UˮMɲ׃ڻزʹCu2+Ni2+Zn2+Cr6+ȽxӏUˮm늝B̎гO(sh)BѴҎ(gu)ģZnNiCrƯϴˮͻؽ?gu)Uˮ̎÷B̎像Uˮ̎ˮԻã(sh)F(xin)]·ѭh(hun)ҺĤ像Uˮо(bo)ܶ࣬ЩI(lng)ҺĤɻA(ch)ՓоM(jn)뵽I(y)(yng)A҇(gu)͊WҺĤg(sh)̎ZnUˮҲ(yng)AuUҺ̎[7]Ĥȡg(sh)һNЧo(w)Ⱦķxg(sh)ԓ(xing)g(sh)ڽȡкܴM(jn)չ
xӽQ̎xӽQxUˮк|(zh)ķ(yng)õxӽQxӽQ(sh)֬ʯȵxӽQ(sh)֬zͺʹǰx(f)sɱڑ(yng)ܴܵxӽQǿQƄ(dng)xc̎Һеxͨ^(gu)xӽQ(li)(sh)F(xin)Ƅ(dng)xӽQĄ(dng)xgȲͽQϵĹܻ(du)xӵH(sh)rxȱٱQxӽQQp@Nϵđ(yng)Խ(li)Խ࣬(rn)[11]ÓʯҪɷֵճˮÛԺȱe^(qing)xӽQ(jng)xӽQ(qing)Džs^yȻʯڌ(du)ؽ?gu)Uˮ̎(rn)иă(yu)c(din)ʯ[9]ǺW(wng)ܽY(ji)(gu)X}V(ni)ȱeЪ(d)صxӽQо[10]ʯďUˮȥؽxӵęC(j)(sh)rxӽQpSxӽQȡռҪλNaCl(du)ȻʯM(jn)A(y)̎xӽQͨ^(gu)xӽQ^(gu)̣Uˮؽxӝȿɝs30ʯȥ~NaCl^(gu)Уȥ_(d)97%ɶQѭh(hun)Ҍ(du)~ȥʲ͡
ڂy(tng)гɱ(f)s(du)ڴ͝ȵкȾy̎ȱc(din)(jng)^(gu)̽оg(sh)ܵ˂ҕSؽٶоM(jn)չ\g(sh)̎ؽ?gu)UˮʬF(xin)l(f)չ(sh)^(j)ȥؽxӵęC(j)ͬɷ֞ﻯW(xu)Լֲޏ(f)