Rice Polish: An Alternative to Conventional Adsorbents for Treating Arsenic Bearing Water by Up-Flow Column Method

Ranjan, D.; Talat, Mahe; Hasan, S. H.

doi:10.1021/ie900877p

Cited by 72 publications

(37 citation statements)

References 38 publications

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“…As adsorbent dose increases, bed height increases, arsenic has more time to contact with TSCC which resulted in higher removal efficiency of arsenic in the column. It was the increase in adsorbent doses in larger beds which provided a greater number of adsorption sites for arsenic with increase in the surface area of TSCC (Han et al 2007;Ranjan et al 2009). …”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

“…The existence of arsenic in groundwater, and eventually in drinking water, is a serious environmental and health problem (Ranjan et al 2009;Biterna et al 2010) in several developing regions (Haque et al 2007). High levels of arsenic in drinking waters are now recognized as a worldwide problem associated with 21 countries.…”

Section: Introductionmentioning

confidence: 99%

“…Several physiochemical techniques, such as adsorption, cation exchange, lime softening, reverse osmosis, coagulation and precipitation have been applied to remove arsenic from aqueous systems. Among these technologies, adsorption is mainly used because it is very simple, cost effective and eco-friendly (Ranjan et al 2009;Srivastava et al 2012). The technique is also popular because of the availability of a wide range of adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…To decrease the cost, some attempts have been made to develop cheaper but effective adsorbents from a variety of agricultural waste materials (Ranjan et al 2009). If we consider the surface carbon chemistry, only physically active char carbon prepared from these agricultural waste materials is likely to provide good substitutes for activated carbon.…”

Section: Introductionmentioning

confidence: 99%

“…The data obtained from batch operations are, in most cases, limited to a laboratory scale and thus do not provide data which can be accurately applied in industrial and household systems. Column operations, on the other hand, are necessary to provide data which can be applied for industrial and household purposes (Maji et al 2007;Ranjan et al 2009). …”

Section: Introductionmentioning

confidence: 99%

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Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

et al. 2013

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Batch and column operations were performed utilizing thioglycolated sugarcane carbon (TSCC), a lowcost adsorbent, to remove As(III) and As(V) from aqueous systems. Under optimized batch conditions, the TSCC could remove up to 92.7 and 91.4 % for As(III) and As(V), respectively. An artificial neural network model showed the validity of TSCC as a preferable adsorbent for arsenic [As(III) and As(V)] removal in batch studies. In column operations, removal efficiency increases with increase in influent arsenic concentration and adsorbent dose and decreases with increase in flow rate. At an adsorbent dose of 6.0 g, flow rate 3.0 mL min -1 , and initial arsenic concentration 1,500 lg L -1 , the arsenic uptake capacity of TSCC for As(III) and As(V) was found to be 85.01 and 83.82 lg g -1 , respectively. The Thomas model was used to analyze the column experimental data. Results from the column operations indicated that the adsorption behavior of arsenic [As(III) and As(V)] fits exceptionally well with the Thomas model with high correlation coefficient and very low standard error. Examinations of scanning electron microscopy and FTIR spectroscopy reveal that high arsenic adsorption favors surface complexation on the adsorbent surface.

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Section: Effect Of Adsorbent Dosementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

et al. 2013

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Novel Calix[4]arene‐based Amberlite XAD‐4 Modified Resin for As(III) Removal from Water

Qureshi

Memon

2012

CLEAN Soil Air Water

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The present article describes As(III) sorption behavior of novel calix[4]arene appended TS‐4 resin. The sorption ability of TS‐4 resin has been evaluated at wide range of pH, i.e., pH 2–14. The maximum As(III) sorption efficiency (95%) was achieved at pH 2, which shows that the TS‐4 resin possesses greater affinity for As(III) at this pH. Column sorption mechanism was evaluated through various operating parameters, i.e., change in concentration, flow rate, bed heights, and pH. The experimental data were also tested against bed depth service time model and from the results; it has been observed that the data is in close agreement with the theoretically calculated values. Thus, from the data it has been revealed that TS‐4 resin has maximum column efficiency of 0.13 mmol g−1. Application of TS‐4 to real samples indicates a slight decrease (2–3%) in extraction efficiency of TS‐4 because of high concentration of total dissolved salts. Thermal behavior was tested by differential scanning calorimetry and it has been observed that TS‐4 resin is stable up to 160°C. TS‐4 resin was found to be regenerable and best regeneration was achieved by using 4% solution of NaOH. It can be deduced from the study that the resin will find its applicability in small as well as industrial scale water purification plants.

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Arsenic Removal from Natural Water Using Low Cost Granulated Adsorbents: A Review

Baig

Sheng

et al. 2014

CLEAN Soil Air Water

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Elevated arsenic concentrations have been detected in drinking water sources worldwide and it threatens to over 200 million people in both developing and developed countries. Adsorption is a conventional process for arsenic removal from contaminated water. Several classes of adsorbing materials have been tested so far. However, far less attention was paid towards granular‐based adsorption and granulation processes. The present work is the first attempt to consider both the granular adsorbent and the granulation process. A particular emphasis was given to cost‐efficient adsorbent for small scale arsenic removal. Some of the features of granular adsorbents are summarized in tables and graphs; address necessary outlines for readers to easily overview the adsorbents' characteristics and design sustainable adsorption system. Earlier, cost of arsenic removals from granular adsorbents were not widely affirmed, but in this review few of them are incorporated for comparisons in future studies. Thus, one gram of arsenic removal from water using novel and iron oxide‐coated sand adsorbents is approximately ranged US$2.3–5.1 and US$3.3–4.2, respectively. Moreover, methods employed for regeneration of exhausted granular adsorbents are discussed. Field scale arsenic remediation measures and the performance evaluations are additionally reported to identify the feasibility of these approaches for scaling up, awareness raising and promotion.

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Rice Polish: An Alternative to Conventional Adsorbents for Treating Arsenic Bearing Water by Up-Flow Column Method

Cited by 72 publications

References 38 publications

Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

Removal of arsenic(III) and arsenic(V) on chemically modified low-cost adsorbent: batch and column operations

Novel Calix[4]arene‐based Amberlite XAD‐4 Modified Resin for As(III) Removal from Water

Arsenic Removal from Natural Water Using Low Cost Granulated Adsorbents: A Review

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