Phytoremediation of Boron using Lemna minor from Synthetic Aqueous Solutions and Real Geothermal Water

Yıl 2021, , 217 - 228, 20.08.2021

Hatice Eser Ökten , Ayşegül Yağmur Gören

https://doi.org/10.19113/sdufenbed.798630

Cited By: 1

Öz

In this study, phytoremediation performance of Lemna minor L. on boron removal from synthetic solution and real geothermal water was evaluated. Effects of initial boron concentration, initial pH, water height in cell, and initial humic acid concentration were investigated. The maximum removal efficiency was achieved as 96.7 % with the experimental run with 5 mg L-1 initial boron concentration, pH 8, and 1.5 cm water depth. Increasing the initial boron concentration from 5 to 30 mg L-1 resulted in a drastic decrease in removal efficiency to 36.6 %, due to the toxic effect of high boron content, which was clearly observed from deterioration of plant’s color and structure. SEM, FTIR, and mass balance analyses revealed that the boron removal mechanism was mainly biosorption. Geothermal water experiments indicated L. minor’s applicability with 59.5% removal efficiency, proving high potential in being used for post-treatment of geothermal waters with high boron content.

Anahtar Kelimeler

Lemna minor L., Phytoremediation, Boron Removal, Geothermal Water

Bor İçeren Sentetik Sulu Çözeltilerin ve Jeotermal Suların Lemna minor Kullanılarak Bitkisel Arıtım Tekniği ile Islahı

Öz

Bu çalışma kapsamında bor içeren sentetik çözeltilerin ve jeotermal suların Lemna minor L. bitkisi kullanılarak ıslahı çalışılmıştır. Çalışmada başlangıç bor konsantrasyonu, pH, arıtım hücresindeki su yüksekliği ve başlangıç hümik asit konsantrasyonlarının giderim verimi üzerine etkisi incelenmiştir. 5 mg L-1 başlangıç bor konsantrasyonu, pH 8 ve 1,5 cm su derinliğinde yürütülen deneysel çalışma ile maksimum bor giderim verimi % 96,7 olarak bulunmuştur. Başlangıç bor konsantrasyonunun 5’den 30 mg L-1’e yükseltilmesi ile bitkinin rengi ve yapısı yüksek bor içeriğinin bitki üzerindeki toksik etkisi nedeni ile bozulmuştur ve sonucunda giderim verimi 36,6% olarak bulunmuştur. SEM, FTIR ve kütle dengesi analizleri, bor giderim mekanizmasının esas olarak biyosorpsiyon olduğunu ortaya koymuştur. Ek olarak, jeotermal su arıtımı çalışmaları, L. minor'un 59,5% bor giderim verimliliği ile uygulanabilirliğini göstermiştir ve yüksek bor içeriğine sahip jeotermal suların son arıtımı için çalışmanın yüksek potansiyeli olduğunu kanıtlamıştır.

Anahtar Kelimeler

Lemna minor L., Bitki Islahı, Bor Giderimi, Jeotermal Su

Kaynakça

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