Guar gum and its composites as potential materials for diverse applications: A review

Development of a novel three-dimensional magnetic polymer aerogel as an efficient adsorbent for malachite green removal

The utilization of dyes in textile industries
has enormously increased in recent years and has
created several environmental problems. Currently,
several methods are in practice to treat wastewaters.
Effective and efficient treatment techniques before the
discharge of used water in the environment are the
need of the hour. This short review covers the research
and recent developments in advanced wastewater
treatment techniques such as nanophotocatalysis,
ceramic nanofiltration membranes, and biofilms. The
primary intent of this review article is to contribute the
ready-made references for the active researchers and
scientists working in the field of wastewater treatment.
This review has mainly focused on advanced physicochemical
and biological techniques for the treatment
of textile dye wastewaters. Further, the influence of
various operating factors on the treatment, advantages,
and disadvantages of various techniques was also
discussed. The recently developed materials for
wastewater treatment are also summarized based on
the latest available literature.

/pdf/a-review-on-advanced-physico-chemical-and-biological-textile-43eih53o7y.pdf

A review on advanced physico-chemical and biological textile dye wastewater treatment techniques

Impact of graphene oxide on removal of heavy metals using mixed matrix membrane

A review on cleaner strategies for chromium industrial wastewater: Present research and future perspective

The wastewater at Sukinda chromite mines (SCM) area of Orissa (India) showed high levels of toxic hexavalent chromium (Cr VI). Wastewater from chromium-contaminated mines exhibit potential threats for biotic community in the vicinity. The aim of the present investigation is to develop a suitable phytoremediation technology for the effective removal of toxic hexavalent chromium from mines wastewater. A water hyacinth species Eichhornia crassipes was chosen to remediate the problem of Cr (VI) pollution from wastewater. It has been observed that this plant was able to remove 99.5% Cr (VI) of the processed water of SCM in 15 days. This aquatic plant not only removed hexavalent Cr, but is also capable of reducing total dissolved solids (TDS), biological oxygen demand (BOD), chemical oxygen demand (COD), and other elements of water also. Large-scale experiment was also performed using 100 L of water from SCM and the same removal efficiency was achieved.

https://www.tandfonline.com/doi/pdf/10.1080/15226514.2016.1216078

Phytoremediation of industrial mines wastewater using water hyacinth.

Anionically functionalized guar gum embedded with silica nanoparticles: An efficient nanocomposite adsorbent for rapid adsorptive removal of toxic cationic dyes and metal ions

Integrated ozonation assisted electrocoagulation process for the removal of cyanide from steel industry wastewater

An eco-friendly and cost effective technique- phytoremediation was used to remediate contaminants from waste water. This study demonstrated that phytoremediation ability of duckweed (Lemna minor L.) to remove chloride, sulphate from Biological Oxygen Treatment (BOT) waste water of coke oven plant. The BOT water quality was assessed by analyzing physico-biochemical characters--pH, Biological oxygen demand (BOD), Chemical oxygen demand (COD), total dissolved solids (TDS) and elemental concentration. It was observed that an increase in pH value indicated an improvement of water quality. The experimental results showed that, duckweed effectively removed 30% chloride, 16% sulphate and 14% TDS from BOT waste water, which suggested its ability in phytoremediation for removal of chloride and sulphate from BOT waste water. A maximum increase of 30% relative growth rate of duckweed was achieved after 21 days of experiment. Thus, it was concluded that duckweed, an aquatic plant, can be considered for treatment of the effluent discharged from the coke oven plant.

Phytoremediation Potential of Duckweed (Lemna minor L.) On Steel Wastewater.

Composite charged nanofiltration membrane of polysulfone and zinc chloride was used to treat the effluent from TATA Steel, India. The effluent contained high amount of total solid and various ions, namely chloride (1000–1200 mg/l), fluoride (140 mg/l), nitrate (37 mg/l) and phosphate (1730 mg/l). The effluent was pre-treated by passing over granular activated carbon and total solid was reduced by 38%. The membrane containing 1 wt% ZnCl2 was found to be optimized one. Chloride concentration was reduced below 800 mg/l via charge–charge interaction by nanofiltration. Similarly fluoride, nitrate and phosphate ions were rejected around 32%, 27% and 70%, respectively. Effect of different operating conditions (transmembrane pressure, cross-flow rate and solution pH) was studied. Rejection of various ions and solid content was reduced with increase in transmembrane pressure and cross flow rate. Based on permeate flux and quality, 1380 kPa and 80 l/h cross flow rate were selected as optimum operating conditions. Simple in-situ washing of the membrane with tap water could recover permeate flux upto 97%. A resistance in series model was used to quantify the effects of polarization on system performance. This system can be scaled up in spiral wound configuration for final deployment.

Supriya Sarkar

Papers

Phytoremediation of industrial mines wastewater using water hyacinth.

Anionically functionalized guar gum embedded with silica nanoparticles: An efficient nanocomposite adsorbent for rapid adsorptive removal of toxic cationic dyes and metal ions

Integrated ozonation assisted electrocoagulation process for the removal of cyanide from steel industry wastewater

Phytoremediation Potential of Duckweed (Lemna minor L.) On Steel Wastewater.

Application of nanofiltration membrane for treatment of chloride rich steel plant effluent