Journal ArticleDOI
Removal of heavy metal ions from aqueous system by ion-exchange and biosorption methods
Arshid Bashir,Lateef Ahmad Malik,Sozia Ahad,Taniya Manzoor,Mudasir Ahmad Bhat,G. N. Dar,Altaf Hussain Pandith +6 more
Reads0
Chats0
TLDR
In this paper, the technical feasibility of biosorption and ion exchange methods for the removal of various heavy metals from the aqueous media is reviewed, where chemical pretreatment of low-cost biosorbents are presented.Abstract:
Pollution due to heavy metals is currently a serious problems affecting water bodies. The removal of heavy metals is of great concern due to their toxicity at trace levels and accumulation in the biosystem. Here we review the technical feasibility of biosorption and ion exchange methods for the removal of various heavy metals from the aqueous media. Chemical pretreatment of low-cost biosorbents are presented. Chemically modified biosorbents exhibit far better adsorption capacities than unmodified ones. We also highlighted the effect of pH on the biosorption for maximal uptake of heavy metals, because pH modifies the surface charge of the biosorbent as well as the speciation of heavy metals.read more
Citations
More filters
Journal ArticleDOI
Detection and removal of heavy metal ions: a review
TL;DR: In this paper, a review of metal free water and methodologies used for rapid detection at low levels is presented, and the application of benign materials and methods for metal removal from aqueous systems is detailed.
Journal ArticleDOI
Heavy metal water pollution: A fresh look about hazards, novel and conventional remediation methods
Camilo Zamora-Ledezma,Daniela Negrete-Bolagay,Freddy Figueroa,Ezequiel Zamora-Ledezma,Ming Ni,Frank Alexis,Victor H. Guerrero +6 more
TL;DR: In this article, the authors discuss some of the most recent and relevant findings related to the release of heavy metals, the possible risks for the environment and human health, the materials and technologies available for their removal.
Journal ArticleDOI
Removal of chromium from wastewater by membrane filtration, chemical precipitation, ion exchange, adsorption electrocoagulation, electrochemical reduction, electrodialysis, electrodeionization, photocatalysis and nanotechnology: a review
TL;DR: In this article, the authors review aqueous chromium species, their toxicity and methods to remove Cr such as membrane filtration, chemical precipitation, ion exchange, adsorption electrocoagulation, electrochemical reduction, electrodialysis, electrodeionization, photocatalysis and nanotechnology.
Journal ArticleDOI
Technological trends in heavy metals removal from industrial wastewater: A review
Rakesh Shrestha,Sagar Ban,Sijan Devkota,Sudip Sharma,Rajendra Joshi,Arjun Prasad Tiwari,Hak Yong Kim,Mahesh Kumar Joshi,Mahesh Kumar Joshi +8 more
TL;DR: In this paper, the authors have reviewed efforts and technological advances achieved so far in the pursuit of more efficient removal and recovery of heavy metals from industrial wastewaters and have evaluated their efficiency dependence on various parameters such as pH, temperature & initial dosing.
Journal ArticleDOI
Critical review on hazardous pollutants in water environment: Occurrence, monitoring, fate, removal technologies and risk assessment.
TL;DR: In this article, the occurrences and fate of hazardous contaminants (dyes, pharmaceuticals and personal care products, heavy metals, fertilizer and pesticides) found in wastewater effluents are reviewed.
References
More filters
Journal ArticleDOI
Arsenic removal from water/wastewater using adsorbents—A critical review
Dinesh Mohan,Charles U. Pittman +1 more
TL;DR: Strong acids and bases seem to be the best desorbing agents to produce arsenic concentrates, and some commercial adsorbents which include resins, gels, silica, treated silica tested for arsenic removal come out to be superior.
Journal ArticleDOI
Natural zeolites as effective adsorbents in water and wastewater treatment
Shaobin Wang,Yuelian Peng +1 more
TL;DR: A review of the recent development of natural zeolites as adsorbents in water and wastewater treatment can be found in this paper, where the properties and modification of natural zerosite are discussed and the modified zerosites achieving higher adsorption capacity for organics and anions.
Journal ArticleDOI
Physico-chemical treatment techniques for wastewater laden with heavy metals
TL;DR: In this article, the technical applicability of various physico-chemical treatments for the removal of heavy metals such as Cd(II), Cr(III, Cr(VI), Cu(II, Ni(II) and Zn(II).
Journal ArticleDOI
Toxicity of lead: A review with recent updates.
TL;DR: A comprehensive account of recent updates describing health effects of lead exposure, relevant biomarkers and mechanisms involved in lead toxicity, and updates the readers about recent advances in chelation therapy and newer therapeutic strategies, like nanoencapsulation, to treat lead induced toxic manifestations are provided.
Journal ArticleDOI
The hydrothermal synthesis of zeolites: precursors, intermediates and reaction mechanism
Colin S. Cundy,Paul A. Cox +1 more
TL;DR: An account of the mechanistic aspects of hydrothermal zeolite synthesis can be found in this paper, where a review of the most probable mechanistic pathways in Zeolite formation is given.