TY  - JOUR
T1  - Assessment of the lead, cadmium, mercury, and arsenic adsorption capacities of edta-modified and umodified cellulose fibres from elephant grass (Pennisetum purpureum)
AU  - Ujah, Innocent
AU  - Ani, Onuabuchi Nnenna
AU  - Nneji, Emmanuel
PY  - 2025
DA  - October
Y2  - 2025
JF  - Trakya University Journal of Natural Sciences
JO  - Trakya Univ J Nat Sci
PB  - Trakya University
WT  - DergiPark
SN  - 2528-9691
SP  - 174
EP  - 181
VL  - 26
IS  - 2
LA  - en
AB  - Heavy metal pollution of water caused by various anthropogenic activities remains a significant global challenge, threatening the supply of clean water. Conventional water remediation approaches are costly with potential environmental risks. Thus, the development of cost-effective and biodegradable remediation methods is imperative. This study assessed the heavy metal adsorption capacities of native and EDTA-modified elephant grass (Pennisetum purpureum) cellulose. Elephant grass was collected from Enugu, Nigeria. The samples were washed and shade-dried. Cellulose was extracted via alkali treatment and bleaching, and then modified with EDTA to enhance its adsorptive properties. Batch adsorption experiments were designed to evaluate the capacities of unmodified and modified cellulose fibers to adsorb heavy metals from aqueous solutions under controlled conditions. The metal ion concentrations before and after adsorption were measured using flame atomic absorption spectrophotometry, and the adsorption capacities were calculated. The unmodified and modified cellulose exhibited the highest affinity for Hg(II) and Cd(II), respectively. Both types effectively removed ~70% of the Hg and Cd ions from solution. These results indicated that the unmodified cellulose was particularly effective for Hg removal, while the modified cellulose excelled in adsorbing Cd. They suggest the potential of these materials for the targeted remediation of specific contaminants and also identify them as cost-effective and biodegradable solutions for remediating heavy metal pollution.
KW  - Cellulose
KW  - heavy metals
KW  - biodegradable
KW  - remediation
KW  - adsorption
N2  - Çeşitli antropojenik faaliyetler sonucu ağır metallerin neden olduğusu kirliliği, temiz su kaynaklarını tehdit eden önemli bir küresel sorunolmaya devam etmektedir. Geleneksel su arıtma yöntemleri maliyetliolup, potansiyel çevresel dezavantajları da bulunmaktadır. Bu nedenle,uygun maliyetli ve biyolojik olarak parçalanabilir arıtma teknikleriningeliştirilmesi zorunludur. Bu çalışmada, sudan ağır metallerinuzaklaştırılması için fil otundan (Pennisetum purpureum) elde edilenmodifiye edilmemiş ve EDTA ile modifiye edilmiş selülozun adsorpsiyonkapasiteleri değerlendirilmiştir. Fil otu Enugu, Nijerya’dan toplanmıştır.Örnekler yıkanmış ve gölgede kurutulmuştur. Alkali işlem ve ağartmayoluyla selüloz ekstraksiyonu yapılan selüloz, adsorpsiyon özelliklerinigeliştirmek için EDTA ile modifiye edilmiştir. Modifiye edilmemiş veEDTA ile modifiye edilmiş selüloz liflerinin sulu çözeltilerden ağırmetalleri adsorbe etme kapasitelerini değerlendirmek için kontrollükoşullar altında toplu adsorpsiyon deneyleri gerçekleştirilmiştir.Adsorpsiyon öncesi ve sonrası metal iyon konsantrasyonları alev atomabsorpsiyon spektrofotometresi kullanılarak ölçülmüş ve adsorpsiyonkapasiteleri buna göre hesaplanmıştır. Modifiye edilmemiş ve edilmişselüloz en yüksek afiniteyi sırasıyla Hg(II) ve Cd(II) için göstermiştir.Her iki selüloz tipi çözeltilerden yaklaşık %70 oranında Hg ve Cdiyonlarını etkili bir şekilde uzaklaştırmıştır. Bulgular, modifiye edilmemişselülozun Hg gideriminde özellikle etkili olduğunu, modifiye selülozunise Cd adsorpsiyonunda üstün olduğunu göstermiştir. Bu sonuçlar, heriki tip selülozun belirli kirleticilere karşı hedefli arıtma potansiyelinesahip olduğunu düşündürmektedir. Sonuçlar bu maddelerin ağır metalarıtımı için uygun maliyetli ve biyolojik olarak parçalanabilir çözümlerolarak ele alınabileceklerine işaret etmektedir.
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UR  - https://dergipark.org.tr/en/pub/trkjnat/issue//1667484
L1  - https://dergipark.org.tr/en/download/article-file/4734087
ER  -