Heerka Cilmi-baadhista Hadda iyo Rajada laga qabo Dib-u-hagaajinta Macdanta Dhulka ee Naadirka ah

Soo-celinta Macdanta Naadirka ah ee Dhulka: Ururiyayaal, Niyad-jabiyayaasha, Frothers & Wakiilada Ka-soo-kabashada Waxtarka leh iyo Soo-kabashada Joogtada ah

Curiyayaasha dhulka naadirka ah (REEs) waxay leeyihiin waxyaabo kala duwan oo gaar ah oo jireed iyo kiimiko ah, taas oo ka dhigaysa mid muhiim u ah codsiyada kala duwan, laga bilaabo qalabka elektaroonigga ah ilaa isticmaalka militariga. Dalalka ay ka mid yihiin Shiinaha, Mareykanka, Japan, iyo Australia ayaa u aqoonsan inay yihiin macdan lagama maarmaan ah. Si kastaba ha ahaatee, macdanta dhulku aad ayay u badan tahay noocyo kala duwan laakiin heerkoodu hooseeyo waxayna inta badan si dhow ula xiriiraan macdanta gangue ee la midka ah. Ka faa'iidaysigoodu wuxuu si aad ah ugu tiirsan yahay horumarka laga sameeyay dib-u-hagaajinta macdanta.

Maqaalkani waxa uu ku wajahan yahay ka faa'iidaysiga hufan ee khayraadka dhulka naadir ah. Waxay soo koobaysaa xaaladda hadda jirta ee cilmi-baarista iyo horumarinta reagents sabaynta macdanta dhulka dhifka ah ku salaysan, oo ay ku jiraan kuwa wax urursada, niyad jab, hawlgeliyayaasha, iyo frothers, oo ay la socdaan hababka sabbeynta. Ka faa'iideysiga kiimikaad ayaa dib u soo celisa nooca ion-nooca naadirka ah macdanta dhulka, oo ay ku jiraan wakiilada leaching iyo wakiilada da'aya, ayaa sidoo kale laga wada hadlay, oo daboolaya xaaladooda cilmi-baarista iyo hababka leaching. Intaa waxaa dheer, xaaladda hadda ee sabayn dhulka dhif ah ururiyayaasha waa la qiimeeyaa, iyo tilmaamaha cilmi mustaqbalka ee Qalabaynta macdanta dhulka naadir reagents waa la falanqeeyay. Dib u eegistani waxay ujeedadeedu tahay inay bixiso tixraac shirkadaha iyo xirfadlayaasha ku hawlan farsamaynta macdanta dhulka dhif iyo horumarinta reagent.

0 Hordhac

Curiyeyaasha dhulka naadirka ah (REEs) waxaa ka mid ah scandium, yttrium, iyo dhammaan 15 lanthanides, oo wadartoodu tahay 17 curiye. Cutubyadani waxay soo bandhigaan noocyo kala duwan oo sifo kimikal ah oo gaar ah, taas oo ka dhigaysa kuwo muhiim u ah qaybaha kala duwan ee rayidka iyo militariga, oo ay ku jiraan caafimaadka, tamarta, iyo warshadaha difaaca. Inta badan waxaa loo yaqaan "fitamiinnada warshadaha," "cunsurka mucjisada ah," "hormoonnada beeraha," iyo "biraha dagaalka," oo loo aqoonsaday inay yihiin macdanta muhiimka ah sida Maraykanka, Shiinaha, Japan, Australia, Kanada, iyo Midowga Yurub. Sida laga soo xigtay Sahanka Juquraafi ee Maraykanka (USGS), laga bilaabo 2022, kaydka caalamiga ah ee naadirka dhulka (REO) wuxuu taagan yahay ku dhawaad ​​120 milyan oo tan, oo ugu horrayn ku urursan Shiinaha (36.7%), Vietnam (18.3%), Brazil (17.5%), Russia (17.5%), India (5.8%), iyo Australia (3.3%).

Miinooyinka naadirka ah ee adduunka ugu weyn waxaa ka mid ah kaydka Shiinaha ee Bayan Obo, Maoniuping, iyo kaydka Ganzhou, miinada Mountain Pass ee Maraykanka, macdanta Araxa iyo Minasu ee Brazil, kaydka harada Strange ee Kanada, kaydka Mount Weld ee Australia, iyo deebaajiga Zandkopsdrift ee Koonfur Afrika. Intaa waxaa dheer, gobollada koonfureed ee Shiinaha, oo ay ku jiraan Jiangxi, Guangdong, Fujian, iyo Yunnan, waxay hoy u yihiin in ka badan 170 tayo sare leh oo ah ion-adsorption naadirka dhulka, oo u adeegaya sida isha aasaasiga ah ee caalamiga ah ee walxaha dhulka dhexdhexaadka ah iyo kuwa culus.

In ka badan 250 nooc oo macdanta dhulka dhif ah ayaa la aqoonsaday, iyadoo bastnäsite ((Ce, La) (CO3) F), monazite ((Ce, La) PO4), xenotime (YPO4), yttrialite (Y2FeBe (SiO4) 2O2), iyo fergusonite (YNbO4) oo xisaabiya in ka badan 95-XNUMX% macdanta dhulka. Si kastaba ha ahaatee, macdantan ayaa inta badan lala xiriiriyaa quartz, fluorite, barite, feldspar, calcite, iyo macdano kale oo silicate gangue ah, taasoo keentay in macdan heer hoose ah oo ay adag tahay in la kala saaro. Sidan oo kale, ka faa'iidaysiga macdanta naadirka ah ee dhulka inta badan waxay u baahan tahay isku darka kala soocida culeyska, kala soocida magnetka, iyo sabbeynta si loo cusboonaysiiyo macdano heer hoose ah loona gaaro heerar dhalaalid warshadeed. Marka laga hadlayo ion-adsorption macdanta dhulka naadirka ah, canaasiirta naadirka ah ee dhulka ayaa lagu xayaysiiyaa sida ions ee meelaha macdanta ah ama lakabyada crystal, una baahan habayn kiimiko si loo soo saaro oksaydhyada dhulka naadir ah.

Haddi la macaamilo macdanta dhulka ku salaysan ama nooca ion-ka ah, codsiga reagents ka faa'iidaysiga ayaa muhiim u ah go'aaminta darajada alaabta, soo kabashada dhulka naadir heerarka, hufnaanta wax soo saarka, kharashyada, iyo saamaynta deegaanka.

Maqaalkani waxa uu diiradda saarayaa ka faa'iidaysiga hufan ee khayraadka dhulka naadir ah, isagoo siinaya dulmar faahfaahsan oo ku saabsan noocyada, hababka, iyo horumarka cilmi baaris ee reagents (ururiyeyaal, frothers, nidaamiye) macdanta dhulka dhif ah ku salaysan macdanta, iyo sidoo kale reagents ka faa'iidaysiga kiimikada (leaching wakiilada, wakiilada roobaadka) ee nooca dhul dhif ah. Waxa kale oo ay soo bandhigaysaa jihooyinka mustaqbalka ee cilmi-baarista iyo horumarinta ee reagents processing macdanta dhulka dhif ah, ujeedadiisu tahay in la siiyo tixraac shirkadaha iyo cilmi-baarayaasha ku hawlan kala soocidda dhulka dhif ama horumarinta reagent warshadaha.

1 Soo-ururinta Dhul-biyoodka Naadirka ah

Ururiyayaashu waxay door muhiim ah ka ciyaaraan sabbaynta dhulka naadir ah iyagoo beddelaya qulqulka hawada sare ee macdanta bartilmaameedka ah, taasoo ka dhigaysa inay u fududaato inay ku dhegganaadaan goobooyin oo ay hagaajiyaan sifooyinkooda sabbaynta. Iyada oo ku saleysan kooxaha shaqeeya, aruuriyayaasha sabbeynta dhulka dhifka ah waxaa loo kala saari karaa acids hydroxamic, acids fatty, phosphonic acids, iyo reagents kale.1.1 Hydroxamic Acid Collectors

Ururiyayaasha Hydroxamic acid, oo la sameeyay 1980-tii, ayaa ah reagen-yaasha ugu badan ee loo isticmaalo sabbaynta dhulka naadir ah. Hydroxamic acids, oo sidoo kale loo yaqaano oximes, ayaa u jira laba nooc oo isomeric ah: oxime (qaab dhismeedka keto) iyo hydroxamic acid (qaab dhismeedka enol), iyadoo oxime ay ugu badan tahay. Labada isomers way kala tagaan si ay u sameeyaan anion isku mid ah inta lagu jiro sabaynta.

Aashitada hydroxamic ee caadiga ah ee loo isticmaalo sabbaynta dhulka naadir ah waxaa ka mid ah C7-C9 alkyl hydroxamic acid, 2-hydroxy-3-naphthohydroxamic acid (H205), 1-hydroxy-2-naphthohydroxamic acid (H203), salicylic hydroxamic acid (L102), cycloalkyl hydroxamicyl acid oaksamicyl, cycloalkyl (OMHA), iyo alaabada kale ee hydroxamic acid la beddelay ama la isku daray, sida H316 (H205 la beddelay), P8 (badanaa hydroxynaphthohydroxamic acid), LF8# (98% hydroxynaphthohydroxamic acid), iyo ururiyaha 103 (salicylic hydroxamic acid). Iyadoo asiidhyada hydroxamic ay muujiyaan xulashada wanaagsan ee walxaha dhifka ah ee dhulka, waxay inta badan u baahan yihiin kuleyl inta lagu jiro sabbeynta, taasoo keenta kharashka tamarta sare, iyo isku-darkoodu wuxuu kaloo noqon karaa mid qaali ah.

1.2 Ururiyayaasha Asiidhka Dufanka leh

Soo-ururinta aashitada dufanka leh ayaa loo isticmaalay sabbaynta dhulka naadir tan iyo 1950-meeyadii markii oleic acid si guul leh loogu dabaqay Mountain Pass ee Maraykanka. Shiinaha, daraasado nidaamsan oo ku saabsan isticmaalka oleic acid iyo saabuunta paraffin oksaydhized ee sabbaynta dhulka naadir ah ayaa bilaabmay 1960-yadii.

Ururiyayaasha asiidhka dufanka leh waxaa laga soo qaatay khudradda dabiiciga ah ama saliidaha xayawaanka, sida caadiga ah waxay ka kooban yihiin isku dhafka C10-C20 saturated iyo carboxylic acids ama cusbada. Reagen-yaasha caadiga ah waxaa ka mid ah oleic acid, oleate sodium, saliid dheer, saabuunta paraffin oksaydhized, Saliida Bacchus, phthalates, naphthenic acid, iyo derivatives batroolka oksaydhized. Si kastaba ha ahaatee, ururiyeyaasha dufanka leh waxay leeyihiin door hoose oo loogu talagalay macdanta dhulka dhifka ah waxayna badanaa u baahan yihiin in lagu daro niyad-jabka iyo hagaajinta heerkulka si loo gaaro kala-bax waxtar leh.

Sabbaynta macdanta dhulka naadirka ah ee la isticmaalayo asiidh dufanka leh ayaa la aaminsan yahay inay ku lug leedahay isku-darka xayaysiinta jirka, falcelinta kiimikada oogada.

1.3 Ashitada Fosfooraska

Fosphonic acid (—P=O) iyo fosphonate (—O—P=O) ururiyayaasha waxay soo bandhigaan waxqabadka sabbaynta xoog badan ee macdanta macdan marka la barbar dhigo ururiyayaasha hydroxamic iyo fatty acid. Si kastaba ha ahaatee, ururiyayaasha phosphonic acid guud ahaan waxay leeyihiin doorasho hoose.

Hadda la isticmaalo ururiyeyaasha phosphonic acid ee dhulka naadirka ah waxaa ka mid ah styrene phosphonic acid, p-toluene phosphonic acid, benzyl phosphonic acid, α-hydroxybenzyl phosphonic acid, iyo alaabada ganacsiga sida P538 iyo Flotinor 1682.

1.4 Ururiyaasha kale

Marka laga reebo asiidhyada hydroxamic, acids dufanka leh, iyo asiidhyada phosphonic, noocyo kala duwan oo aruuriyayaal cusub ayaa la sahamiyay si loo hagaajiyo waxtarka sabbeynta dhulka naadir iyo xulashada. Qaar ka mid ah kuwan waxaa ka mid ah sulfonates, thio-phosphates, iyo milixyada ammonium ee quaternary.

• Sulfates: Sulfonates ayaa la sheegay in ay soo bandhigaan xulashada wanaagsan iyo waxqabadka hababka sabbeynta, laakiin codsigooda dhulka macdanta dhifka ah ayaa weli ku jira heerarkii hore.

• Thio-phosphates: Ururiyayaashan waxaa inta badan loo isticmaalaa sabbaynta macdanta sulfide, laakiin cilmi baaris lagu sameeyo codsigooda sabbaynta dhulka dhifka ah ayaa socota.

• Quaternary Ammonium cusbadaIskudhisyadan waxa lagu sahamiyay awooda ay u leeyihiin in ay sabeeyaan macdanaha aan sulfidka ahayn,waxana qaar guulo laga soo sheegay sabbaynta dhulka naadir ah. Waxay ku shaqeeyaan soo jiidashada elektrostatic oo leh dusha macdanta si xun loo dallaco.

Cilmi-baadhayaashu waxay si joogto ah u tijaabinayaan reagents cusub si kor loogu qaado waxtarka sabbeynta macdanta naadirka ah ee dhulka, diiradda saaraya labadaba hagaajinta heerarka soo kabashada iyo yaraynta saameynta deegaanka ee kiimikooyinkaas.

2 Niyad-jabiyeyaasha Dhulka Naadirka ah

Niyad-jabiyayaasha ayaa lama huraan u ah sabbeynta macdanta dhifka ah ee dhulka si ay si xushmad leh u joojiyaan macdanta gangue, si ay u wanaajiyaan xulashada iyo soo saarista bartilmaameedka macdanta dhulka dhifka ah. Macdanta gangue ee aasaasiga ah ee la xidhiidha macdanta dhulka naadirka ah, sida quartz, calcite, iyo barite, ayaa inta badan muujiya dabeecadaha sabbaynta, taas oo ka dhigaysa xannibaaddooda door muhiim ah.

Niyad-jabiyeyaasha caadiga ah ee sabbaynta dhulka naadir ah waxaa ka mid ah galaaska biyaha (sodium silicate), sodium fluoride, tannins, iyo istaarij.

2.1 Sodium Silicate (Muraayadaha Biyaha)

Sodium silicate, oo caadi ahaan loo yaqaano galaaska biyaha, waa mid ka mid ah niyad-jabka aadka loo isticmaalo ee sabbaynta dhulka naadir ah. Waxaa loo isticmaalaa in lagu xakameeyo macdanta silicate sida quartz iyo feldspar. Habka ficilka niyad-jabka ee sodium silicate waxaa guud ahaan loo aaneynayaa sameynta lakabka silica ee dusha sare ee macdanta gangue, taas oo ka hortagaysa xayeysiiska ururiyaha.

Muraayadaha biyuhu waa wax ku ool ah, niyad jab jaban, laakiin waxqabadkeeda waxaa saamayn kara arrimo ay ka mid yihiin pH, xoojinta ion, iyo qiyaasta reagent. Cilmi-baarayaashu waxay sahamiyaan silicates la beddelay iyo kiimikooyinka kale ee lagu daro si loo hagaajiyo xulashada muraayadda biyaha.

2.2 Sodium Fluoride

Sodium fluoride waxa loo isticmaalaa in lagu buufiyo calcite hababka sabbaynta dhulka naadir ah. Saameynteeda niyad-jabka ah waxay ku saleysan tahay fal-celinta u dhexeysa ion fluoride iyo ions calcium, sameynta filim foloraydh calcium ah oo aan la milmi karin oo ku yaal dusha macdanta, taas oo ka hortagaysa xayeysiiska ururiyaha.

Si kastaba ha ahaatee, sodium fluoride waa walax aad u sun ah, isticmaalkeeduna wuxuu keeni karaa walaac deegaan iyo badbaado. Natiijo ahaan, cilmi-baarayaashu waxay si firfircoon u raadinayaan beddelaad badbaado leh.

2.3 Tannins iyo istaarij

Tannins iyo istaarijku waa tusaaleyaal depressants organic loo isticmaalo sabbaynta dhulka naadir ah. Tannins, oo ka soo jeeda qalabka dhirta, ayaa loo isticmaalaa si loo yareeyo macdanta gangue sida barite iyo fluorite. Nidaamkoodu wuxuu ku lug leeyahay kakanaanta aoniska birta ee dusha macdanta, hoos u dhigista isku xirnaanta ururiyaha.

Istaarijka waxaa caadi ahaan loo isticmaalaa niyad-jabka hematite iyo macdanta kale ee birta-sida ee sabbeynta macdanta dhulka naadir ah. Isdhexgalka ka dhexeeya istaarijka iyo macdanta caadi ahaan waa mid jireed, iyadoo molecules istaarijku ay ku qulqulayaan dusha macdanta, ka hortagga ficil-ururinta.

2.4 Niyad-jabka cusub

Horumarinta niyad-jabka cusub waa aag joogto ah oo cilmi baaris ah oo ku saabsan sabbeynta dhulka naadir ah. Dib-u-hawlgalayaashan cusub waxay ujeedadoodu tahay inay hagaajiyaan xulashada oo ay yareeyaan saameynta deegaanka ee habka sabbeynta. Tusaalooyinka horumarkii dhawaa waxaa ka mid ah istaarjyo la beddelay, polymers synthetic, iyo depressants organic biodegradable.

3 Walaalo ah oo Naadirka ah Sabaynta Dhulka

Frothers waxay door muhiim ah ka ciyaaraan abuurista maraq deggan unugyada sabbeynta, taas oo awood u siinaysa kala soocida macdanta dhifka ah ee dhulka iyo walxaha gangue. Frothers waxay saameeyaan cabbirka xumbo, xasilloonida xumbo, iyo kinetics sabbeynta. Barafka sida badan loo isticmaalo sabbaynta dhulka naadirka ah waa alkohol-ku-saleysan iyo reagen-ku-saleysan eter-ku-saleysan.

3.1 Walaalaha Khamriga Ku Salaysan

Barafka khamriga ku salaysan, sida methyl isobutyl karbinol (MIBC) iyo saliid geed, ayaa si weyn loogu isticmaalaa sabbeynta macdanta, oo ay ku jiraan sabbeynta dhulka naadir ah. Xuubyadani waxay caawiyaan inay abuuraan goobooyin yaryar oo deggan kuwaas oo kor u qaadaya sabbaynaya qaybo yaryar.

Baradhada alkohol-ku-salaysan waa kuwo raqiis ah oo waxtar leh, laakiin waxqabadkoodu wuu kala duwanaan karaa iyadoo ku xiran arrimo ay ka mid yihiin pH, halabuurka macdanta, iyo isdhexgalka reagent.

3.2 Walaalaha Ether-ku-salaysan

Barafka Ether-ku-salaysan, sida polypropylene glycol ethers (tusaale, DF-250), ayaa sidoo kale caadi ahaan loo isticmaalaa sabbaynta dhulka naadir ah. Barafkani waxay u muuqdaan inay soo saaraan xumbo dhuuban iyo maraq deggan marka loo eego maraqyada alkolada ku salaysan. Si kastaba ha noqotee, frothers-ku-salaysan ether-ku wuu ka qaalisanaan karaa waxaana laga yaabaa inay u baahdaan xakamaynta qiyaasta saxda ah.

3.3 Walaalo Novel

Cilmi-baadhis lagu sameeyo qalfoofyada cusub ee sabbaynta dhulka naadirka ah waxay diiradda saartaa hagaajinta xulashada iyo xasilloonida maraq iyadoo la yareynayo saameynta deegaanka. Kuwaas waxaa ka mid ah baraf-baxyada noolaha iyo barafyada leh iska caabbinta soo hagaagtay ee joogitaanka saliidaha iyo wasakhooyinka kale ee ku jira qulqulka sabbeynta.

4 Leaching Reagents oo loogu talagalay Ion-Adsorption Naadirka Dhulka

Ion-adsorption macdanta dhulka dhifka ah ayaa gaar u ah in canaasiirta dhifta ah ee dhulka lagu dhejiyo oogada macdanta dhoobada ah halkii lagu xidhi lahaa dhismayaasha macdanta. Macdantan waxaa sida caadiga ah lagu farsameeyaa iyadoo la isticmaalayo leaching halkii la sabbeyn lahaa. Waxyaalaha leaching ayaa door muhiim ah ka ciyaara geedi socodkan iyaga oo ka mira-dhaliya ion-yada dhifka ah ee dhulka ee ka yimaadda sagxadaha dhoobada.

4.1 Ammonium Sulfate Leaching

Ammonium sulfate waa wakiilka dheecaanka ee inta badan loo isticmaalo ion-adsorption macdanta dhulka naadirka ah. Amooniyamka ammonium ee xalka ku jira waxay ku beddelanayaan ions dhulku naadirka ah ee dusha sare ee macdanta dhoobada, iyaga oo sii deynaya xal. Habkani waa mid si weyn loo isticmaalo sababtoo ah kharashkiisa yar iyo fududaantiisa.

Si kastaba ha ahaatee, dheecaanka ammonium sulfate wuxuu sababi karaa arrimo deegaan oo muhiim ah, gaar ahaan marka la eego wasakhowga ammonium ion. Waxaa lagu dadaalayaa sidii loo soo saari lahaa habab kale oo deegaanka u wanaagsan.

4.2 Sodium Chloride iyo Magnesium Sulfate Leaching

Sodium chloride iyo magnesium sulfate ayaa la baadhay si ay badal uga noqdaan ammonium sulfate. Dib-u-hawlgalayaashani waxay ku shaqeeyaan habab is-weydaarsiga ion isku mid ah laakiin waxay leeyihiin faa'iidada inay waxyeello yar u geystaan ​​deegaanka. Si kastaba ha ahaatee, waxay u muuqdaan kuwo waxtarkoodu yar yahay marka la eego heerarka soo kabashada, waxaana loo baahan yahay cilmi-baaris dheeraad ah si kor loogu qaado isticmaalkooda.

4.3 Wakiilada Leaching Organic

Walxaha dheecaanka dabiiciga ah, sida citric acid iyo EDTA, ayaa loo sahamiyay inay yihiin bey'ada u saaxiibka ah ee beddelka reagents-ka caadiga ah. Iskudhisyadan dabiiciga ah waxay si wax ku ool ah u shaandheyn karaan ion dhulka naadirka ah, taasoo ka dhigaysa inay si fudud uga soo baxaan macdanta. Si kastaba ha ahaatee, qiimaha reage-yaashan ayaa ah arrin xaddidaysa korsashadooda baahsan.

5 Wakiilo Da'ay oo loogu talagalay Ion-Adsorption Naadirka Dhulka

Mar haddii ion dhul dhif ah lagu shubo xal, waxay u baahan yihiin in la dedejiyo oo la soo kabsado. Waxyaalaha soo da'aya ayaa loo isticmaalaa in lagu sameeyo isku-dhisyo dhul dhif ah kuwaas oo laga sooci karo xalalka leach.

5.1 Ammonium Bicarbonate

Ammonium bicarbonate waxaa badanaa loo isticmaalaa in lagu soo dajiyo ion dhul dhif ah oo ka yimaada xalalka caleenta sida karbohaynada dhulka naadir ah. Reagent Tani waa mid wax ku ool ah oo qiimo jaban, laakiin waxay soo saari kartaa xaddi badan oo biyo wasakh ah oo amooniyam ku jira, kuwaas oo keena caqabadaha deegaanka.

5.2 Oxalic acid

Oxalic acid waxaa si weyn loo isticmaalaa in lagu soo dajiyo curiyayaasha dhulka naadir sida oxalates dhulku naadirka ah, kaas oo markaa la xisaabin karo si loo soo saaro oksaydhyada dhulka naadir ah. Oxalic acid aad buu waxtar u leeyahay laakiin wuu ka qaalisan karaa ammonium bicarbonate. Intaa waxaa dheer, maaraynta oxalic acid waxay u baahan tahay tallaabooyin badbaado oo taxaddar leh sababtoo ah sunteeda.

5.3 Wakiilada Roobka Cusub

Cilmi-baadhistu way socotaa si loo soo saaro wakiillo soo da'aya oo badan oo door ah iyo deegaan aan fiicnayn oo soo kabashada dhulka naadir ah. Kuwaas waxaa ka mid ah acids organic, reagents biodegradable, iyo ion-exchange resins.

6 Tilmaamaha Mustaqbalka iyo Rajada

Mustaqbalka reagents farsamaynta macdanta dhulka naadir waxa ay ku jirtaa horumarinta xulasho badan, hufan, iyo reagents deegaan ahaan u wanaagsan. Meelaha muhiimka ah ee cilmi-baarista mustaqbalka waxaa ka mid ah:

• Horumarinta reagents cagaaran: Saamaynta bay'ada ee sabbaynta iyo reagents-ka dareeraha ayaa ah walaac weyn, gaar ahaan marka la eego habka naadirka dhulka. Waxaa jirta baahi sii kordheysa oo loo qabo horumarinta biodegradable, reagents aan sun ahayn oo bedeli kara kiimikooyinka dhaqanka sida ammonium sulfate iyo oxalic acid.

• Hagaajinta xulashada: Ururiyayaal cusub, niyad-jabka, iyo qaboojiyaha ayaa loo baahan yahay si loo hagaajiyo xulashada sabbaynta dhulka naadir ah, gaar ahaan kuwa heerka hoose iyo macdanta adag. Tan waxaa ka mid ah sahaminta qaababka cusub ee molecular iyo wax ka beddelka dib-u-hawlgalayaasha jira.

• Kharashka yar: Qiimaha sarreeya ee qaar ka mid ah qalabka wax-soo-saarka dhulka naadir ah, gaar ahaan asiidhyada hydroxamic iyo phosphonic acids, ayaa ah arrin xaddidaysa isticmaalkooda baahsan. Cilmi-baarista mustaqbalka waa in ay diiradda saartaa isku-dhafka beddelaadyo la awoodi karo ama hagaajinta waxtarka reage-yaasha jira si loo yareeyo shuruudaha qiyaasta.

• Joogtaynta deegaanka: Iyada oo la kordhinayo xeerarka adduunka oo dhan oo loogu talagalay in lagu dhimo saamaynta deegaanka ee hawlgallada macdanta, horumarinta tignoolajiyada wax-qabadka dhifka ah ee deegaanka ayaa noqonaysa mid aad muhiim u ah. Tan waxaa ka mid ah in la yareeyo isticmaalka kiimikooyinka waxyeelada leh iyo yaraynta abuuritaanka qashinka iyo wasakhowga.

Gebogebadii, farsamaynta macdanta dhulka naadir waxa ay si aad ah ugu xidhan tahay isticmaalka reagents kiimikaad, cilmi baadhista socotana waa lama huraan si loo wanaajiyo hufnaanta, xulashada, iyo joogtaynta reagen-yaashan. Horumarinta dib-u-hagaajinta cusub ee cagaarka ah waxay muhiim u noqon doontaa mustaqbalka faa'iidooyinka dhifka ah ee dhulka, iyadoo baahida caalamiga ah ee macdantan muhiimka ah ay sii kordheyso.