Evaluation of Amberlite IRA96 and Dowex 1×8 ion-exchange resins for the removal of Cr(VI) from aqueous solution

Modeling and evaluation of chromium remediation from water using low cost bio-char, a green adsorbent

“…Redlich-Peterson equation [55] incorporates three parameters where the exponentˇ, lies between 0 and 1. q e = K RP C e 1 + a RP C eˇ ( 14) where K RP , a RP andˇare Redlich-Peterson constants and the exponent,ˇ, lies between 0 and 1. Forˇ= 1, it reduces to Langmuir adsorption isotherm.…”

“…Such chromium ground water contamination emphasized the need to develop low cost technology suitable to apply under local conditions. Treatment technologies to remove chromium from water include chemical precipitation [11], constructed wetland [12], ion exchange [13,14], membrane separation [15], ultrafiltration [16], sedimentation [17], adsorption [1,18], etc. Chemical precipitation has traditionally been used the most.…”

K4Nb6O17·4.5H2O: A novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III)

“…In fact, Cr(III) ions dissolved in water are still potential health hazards [21], since when exposed in a variable environment, trivalent chromium ions could be likely oxidized to Cr(VI) with an extremely high toxicity. K 4 Nb 6 O 17 is a typical two-dimensional layered semiconductor, which consists of octahedral units of NbO 6 and oxygen bridging atoms [22]. The layers are negatively charged, with K + ions existing in between the layers to compensate for these charges [23].…”

Preparation of Petaloid TPEE@AlOOH Nanofibers with Cr (VI)-Removal Capacity

“…Therefore, it is urgent and important to¯nd out a simple and e®ective way to remove Cr (VI) from the source water in an acceptable level. Nowadays, various treatment technologies have been applied to Cr (VI) removal including, chemical precipitation, 6 ion exchange, 7 electrochemical removal, 8 adsorption, 9 membrane technology 10 and polymer enhanced ultra¯ltration, 11 etc. Each method, however, has been found to be limited due to its incomplete metal removal, expensive process and high reagent energy requirements.…”