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Sri Martini

Bio: Sri Martini is an academic researcher from Telkom University. The author has contributed to research in topics: Humanities & Wastewater. The author has an hindex of 7, co-authored 45 publications receiving 102 citations. Previous affiliations of Sri Martini include Bogor Agricultural University & Jenderal Soedirman University.

Papers published on a yearly basis

Papers
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Journal ArticleDOI
TL;DR: In this article , a review of the use of algae and seaweed biomass as potential sorbent for heavy metal bioremediation is presented, and relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of the process are highlighted.
Abstract: The presence of heavy metals in water bodies is linked to the increasing number of industries and populations. This has serious consequences for the quality of human health and the environment. In accordance with this issue, water and wastewater treatment technologies including ion exchange, chemical extraction, and hydrolysis should be conducted as a first water purification stage. However, the sequestration of these toxic substances tends to be expensive, especially for large scale treatment methods that require tedious control and have limited efficiency. Therefore, adsorption methods using adsorbents derived from biomass represent a promising alternative due to their great efficiency and abundance. Algal and seaweed biomass has appeared as a sustainable solution for environmentally friendly adsorbent production. This review further discusses recent developments in the use of algal and seaweed biomass as potential sorbent for heavy metal bioremediation. In addition, relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of adsorption process are also highlighted. Overall, the critical conclusion drawn is that algae and seaweed biomass can be used to sustainably eliminate heavy metals from wastewater.

62 citations

Journal ArticleDOI
TL;DR: In this paper, the efficiency of eucalyptus bark (EB) to remove COD, oil, and Cr(III) from raw petroleum refinery effluent was investigated under different operating conditions: namely contact time, solution pH, temperature, and sorbent dosage.
Abstract: This study has investigated the efficiency of eucalyptus bark (EB) to remove COD, oil, and Cr(III) from raw petroleum refinery effluent. Experimental works were conducted to assess the performance of raw and modified EB using chemical impregnation, carbonization, and hybrid pre-treatment. Then modified EB by hybrid H3PO4/carbonization that showed the best performance was further examined under different operating conditions: namely contact time, solution pH, temperature, and sorbent dosage. In general, removal efficiencies of COD, oil, and Cr(III) increased with the increase in contact time and sorbent dosage while acidic pH was favourable for achieving higher removal efficiency for targeted pollutants. The maximum removal efficiencies of COD, oil, and Cr(III) were 80, 91, and 61%, respectively. Meanwhile, the optimum operating conditions were found at contact time 100 min, sorbent dosage 10 g/L, pH 3, and temperature 25 °C. FTIR and SEM were also applied to characterize the sorbent. The Freundlich adsorption isotherm model shows a better correlation coefficient among the other isotherm models including Langmuir and Dubinin-Radushkevich with the R2 value of 0.9758. The adsorption kinetic examined using different kinetic models including pseudo-first order, pseudo-second order, intra-particle diffusion, liquid film diffusion, and double exponential follows intra-particle diffusion model.

28 citations

Journal ArticleDOI
01 Dec 2014
TL;DR: In this article, a conceptual framework for the added value and performance analyses of Edamame supply chain management with a company as a buyer and farmers as its suppliers is described, analyzed and compared.
Abstract: This paper describes a conceptual framework for the added value and performance analyses of Edamame supply chain management with a company as a buyer and farmers as its suppliers. The main objective of this paper was to illustrate how XCo, as the company of fresh Edamame, can analyze as well as assess the added value and performance in each supply chain members. Data in this case study were collected through indepth interviews with the supply chain members and from secondary data records available at the supply chain members. The supply chain structure and two main supply chain issues, i.e. added value and business performance at each supply members, were described, analyzed and compared. The supply chain added value was described and analyzed using Hayami method, while the supply chain performance was analyzed using the combination of Data Envelopment Analysis with pairwise comparison of Analytical Hierarchy Process. The results show that XCo obtained the highest added value, however about 50% of farmer groups still had negative added values. Based on the performance analysis, it was known that failures to comply with the order quantity and time delivery schedule were major factors that decrease the farmers’groupefficiency. XCo together with farmers’ group members should collaborate in scheduling the planting and harvesting.

13 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article , a review of the use of algae and seaweed biomass as potential sorbent for heavy metal bioremediation is presented, and relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of the process are highlighted.
Abstract: The presence of heavy metals in water bodies is linked to the increasing number of industries and populations. This has serious consequences for the quality of human health and the environment. In accordance with this issue, water and wastewater treatment technologies including ion exchange, chemical extraction, and hydrolysis should be conducted as a first water purification stage. However, the sequestration of these toxic substances tends to be expensive, especially for large scale treatment methods that require tedious control and have limited efficiency. Therefore, adsorption methods using adsorbents derived from biomass represent a promising alternative due to their great efficiency and abundance. Algal and seaweed biomass has appeared as a sustainable solution for environmentally friendly adsorbent production. This review further discusses recent developments in the use of algal and seaweed biomass as potential sorbent for heavy metal bioremediation. In addition, relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of adsorption process are also highlighted. Overall, the critical conclusion drawn is that algae and seaweed biomass can be used to sustainably eliminate heavy metals from wastewater.

62 citations

Book ChapterDOI
01 Jan 2004
TL;DR: In this paper, the authors focus on physical factors and processes, numerous principles and the transition of contaminant reactions from kinetics to equilibrium conditions in the environment, and then apply these concepts to inorganic substances.
Abstract: This chapter focuses on physical factors and processes, numerous principles and the transition of contaminant reactions from kinetics to equilibrium conditions in the environment. An introduction to basic environmental chemistry is provided, and then these concepts are applied to inorganic substances. It is important to bear in mind that the chemical processes include both the chemical characteristics of the compartment (e.g., air, water, soil, sediment, or biota) and those of the contaminant. One must constantly link the contaminant to where it resides in the environment. Environmental chemistry is the discipline that concerns itself with how chemicals are formed, how they are introduced into the environment, how they change after being introduced, where they end up in organisms and other receptors, and the effects they have (usually the damage they do) once they get there. Furthermore, the chapter also deals with the discussion of inorganic and organic chemistry.

51 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide a thorough review of water-food-environment nexus application in food processing industries and explore the nexus from different aspects, both qualitatively and quantitatively.
Abstract: Food processing is among the greatest water-consuming industries with a significant role in the implementation of sustainable development goals. Water-consuming industries such as food processing have become a threat to limited freshwater resources, and numerous attempts are being carried out in order to develop and apply novel approaches for water management in these industries. Studies have shown the positive impact of the new methods of process integration (e.g., water pinch, mathematical optimization, etc.) in maximizing water reuse and recycle. Applying these methods in food processing industries not only significantly supported water consumption minimization but also contributed to environmental protection by reducing wastewater generation. The methods can also increase the productivity of these industries and direct them to sustainable production. This interconnection led to a new subcategory in nexus studies known as water-food-environment nexus. The nexus assures sustainable food production with minimum freshwater consumption and minimizes the environmental destructions caused by untreated wastewater discharge. The aim of this study was to provide a thorough review of water-food-environment nexus application in food processing industries and explore the nexus from different aspects. The current study explored the process of food industries in different sectors regarding water consumption and wastewater generation, both qualitatively and quantitatively. The most recent wastewater treatment methods carried out in different food processing sectors were also reviewed. This review provided a comprehensive literature for choosing the optimum scenario of water and wastewater management in food processing industries.

35 citations

Journal ArticleDOI
TL;DR: In this paper, the effectiveness of tea waste biochar (BC) as an adsorbent for the oxidizable organic contaminants measured as chemical oxygen demand (COD) in produced water (PW) was explored.
Abstract: This study was conducted to explore the effectiveness of tea waste (TW) biochar (BC) as an adsorbent for the oxidizable organic contaminants measured as chemical oxygen demand (COD) in produced water (PW). BCs were prepared by modifying the TW with single (pre-pyrolysis) and combined (pre and post pyrolysis) treatments using phosphoric acid and hydrogen peroxide solutions. Based on FTIR, XPS, XRD and BET characterizations, the combined modified BC had higher oxygen-containing functional groups (-OH and -COOH), surface area (82 ± 0.50 m2/g) and pore volume (0.08 ± 0.001 cm 3/g) compared to single modified BC (60 ± 0.50 m2/g, 0.02 ± 0.002 cm 3/g). The Langmuir monolayer adsorption model best fitted both BCs with separation factor R L

34 citations