Cargando…

Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel

Paddy field soil contaminated by cadmium may produce cadmium-containing corn due to the paddy's strong ability to accumulate cadmium. The in situ washing of soil with an organic acid is one of the suitable technical choices for the remediation of cadmium-contaminated soils. The limiting factor...

Descripción completa

Detalles Bibliográficos
Autores principales: Sun, Jiangang, Yin, Lipu, Huang, Kai, Li, Xiaohui, Ai, Xianbin, Huang, Ying, Yin, Yanli, Liu, Junyou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9084252/
https://www.ncbi.nlm.nih.gov/pubmed/35542486
http://dx.doi.org/10.1039/c8ra03502d
_version_ 1784703571484213248
author Sun, Jiangang
Yin, Lipu
Huang, Kai
Li, Xiaohui
Ai, Xianbin
Huang, Ying
Yin, Yanli
Liu, Junyou
author_facet Sun, Jiangang
Yin, Lipu
Huang, Kai
Li, Xiaohui
Ai, Xianbin
Huang, Ying
Yin, Yanli
Liu, Junyou
author_sort Sun, Jiangang
collection PubMed
description Paddy field soil contaminated by cadmium may produce cadmium-containing corn due to the paddy's strong ability to accumulate cadmium. The in situ washing of soil with an organic acid is one of the suitable technical choices for the remediation of cadmium-contaminated soils. The limiting factor of this method lies in the recycling and reuse of the huge amount of washing effluent in an efficient and economical way. In present study, the simulated solutions were used to examine the adsorption efficiency of cadmium on a biosorbent which was synthesized by using garlic peel as the raw material. The biosorption behavior of cadmium on garlic peel was systematically studied in the presence of a citrate ligand. Presented here for the first time, garlic peel with buoyant properties was carefully collected and used for the preparation of the adsorbent, and verified to have a prominent advantage in efficiently separating from the solution after adsorption because of its floatability. Results show that the presence of citrate has a significant inhibition effect on the adsorption behavior of cadmium on the floating garlic peel, at the optimal pH of 4.0, which can be ascribed to the competitive affinity to the cadmium from the citrate ligand. SEM shows that floating garlic peel has a ruffled epidermis in the flat surface and porous microstructure in the transversal surface, making it durable enough and favorable for adsorption; and –COOH was determined by FTIR to be the main functional group contributing to the adsorption capability of garlic peel. Cadmium can be eluted off the garlic peel after adsorption, and the garlic peel can be then reused for the next cycle of adsorption with little decrease in adsorption capacity, even after ten adsorption/desorption cycles. The real leach liquor of cadmium-contaminated soil sample by 0.01 mol L(−1) citric acid solution was used for testing, and it was found that after three adsorption uses, almost all the cadmium in the leach liquor had been recovered by the floating garlic peel. The above research results provided a possible route to recycle the soil washing solution by biosorption, giving a great perspective in the remediation of paddy field soil contaminated by cadmium.
format Online
Article
Text
id pubmed-9084252
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher The Royal Society of Chemistry
record_format MEDLINE/PubMed
spelling pubmed-90842522022-05-09 Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel Sun, Jiangang Yin, Lipu Huang, Kai Li, Xiaohui Ai, Xianbin Huang, Ying Yin, Yanli Liu, Junyou RSC Adv Chemistry Paddy field soil contaminated by cadmium may produce cadmium-containing corn due to the paddy's strong ability to accumulate cadmium. The in situ washing of soil with an organic acid is one of the suitable technical choices for the remediation of cadmium-contaminated soils. The limiting factor of this method lies in the recycling and reuse of the huge amount of washing effluent in an efficient and economical way. In present study, the simulated solutions were used to examine the adsorption efficiency of cadmium on a biosorbent which was synthesized by using garlic peel as the raw material. The biosorption behavior of cadmium on garlic peel was systematically studied in the presence of a citrate ligand. Presented here for the first time, garlic peel with buoyant properties was carefully collected and used for the preparation of the adsorbent, and verified to have a prominent advantage in efficiently separating from the solution after adsorption because of its floatability. Results show that the presence of citrate has a significant inhibition effect on the adsorption behavior of cadmium on the floating garlic peel, at the optimal pH of 4.0, which can be ascribed to the competitive affinity to the cadmium from the citrate ligand. SEM shows that floating garlic peel has a ruffled epidermis in the flat surface and porous microstructure in the transversal surface, making it durable enough and favorable for adsorption; and –COOH was determined by FTIR to be the main functional group contributing to the adsorption capability of garlic peel. Cadmium can be eluted off the garlic peel after adsorption, and the garlic peel can be then reused for the next cycle of adsorption with little decrease in adsorption capacity, even after ten adsorption/desorption cycles. The real leach liquor of cadmium-contaminated soil sample by 0.01 mol L(−1) citric acid solution was used for testing, and it was found that after three adsorption uses, almost all the cadmium in the leach liquor had been recovered by the floating garlic peel. The above research results provided a possible route to recycle the soil washing solution by biosorption, giving a great perspective in the remediation of paddy field soil contaminated by cadmium. The Royal Society of Chemistry 2018-08-07 /pmc/articles/PMC9084252/ /pubmed/35542486 http://dx.doi.org/10.1039/c8ra03502d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Sun, Jiangang
Yin, Lipu
Huang, Kai
Li, Xiaohui
Ai, Xianbin
Huang, Ying
Yin, Yanli
Liu, Junyou
Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title_full Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title_fullStr Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title_full_unstemmed Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title_short Removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
title_sort removal of cadmium from a citrate-bearing solution by floatable microsized garlic peel
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9084252/
https://www.ncbi.nlm.nih.gov/pubmed/35542486
http://dx.doi.org/10.1039/c8ra03502d
work_keys_str_mv AT sunjiangang removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT yinlipu removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT huangkai removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT lixiaohui removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT aixianbin removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT huangying removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT yinyanli removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel
AT liujunyou removalofcadmiumfromacitratebearingsolutionbyfloatablemicrosizedgarlicpeel