Management of Solid Waste Marble Powder: Improving Quality of Sodium Chloride Obtained From Sulphate Rich Lake/Subsoil Brines With Simultaneous Recovery of High Purity Gypsum and Light Basic Magnesium Carbonate

Marble industry worldwide produces large amount of non-degradable marble dust powder (MDP) waste during mining and processing stages. MDP mainly comprises of CaCO3 with small amounts of Mg, Fe or Si in various forms. In India, mainly in Rajasthan state, marble is quarried in huge amounts and MDP thus produced is collected improperly and dumped at any abandoned land or identified disposal sites leading to several environment hazards. On the other hand, the composition of sub soil/lake brines of Rajasthan is typical in nature as it does not have much Ca2+ and Mg2+ impurities but contains higher levels of SO42-. Therefore, the common salt (NaCl) produced from such brines is contaminated with Na2SO4 (8-30 wt%) depending upon SO42- concentration in the brine. Such a salt produced is neither suitable for edible purpose nor for industrial usage. Herein, we have reacted MDP with HCl, and the resulting solution (CaCl2 and MgCl2 slurry) is used in stoichiometric ratio of Ca2+ to SO42- in brines to produce high purity NaCl and gypsum (CaSO4·2H2O) via fractional crystallization. Remaining magnesium containing solution was reacted with Na2CO3 to prepare high purity light basic magnesium carbonate hydrate. Purity of crystallized NaCl, CaSO4·2H2O and MgCO3·6H2O has been ascertained through analytical and spectral methods (TGA, FTIR, P-XRD). Field emission scanning electron microscopy (FE-SEM) was used to elucidate morphology of crystals. The method reported for improving purity of NaCl along with CaSO4·2H2O and MgCO3·6H2O production from sulphate rich brines is simple and economic, and allow management of MDP generated in huge amounts, which poses problems of disposal and creates environment hazards.

Extraction of Abandoned Land in Hilly Areas Based on the Spatio-Temporal Fusion of Multi-Source Remote Sensing Images

Hilly areas are important parts of the world’s landscape. A marginal phenomenon can be observed in some hilly areas, leading to serious land abandonment. Extracting the spatio-temporal distribution of abandoned land in such hilly areas can protect food security, improve people’s livelihoods, and serve as a tool for a rational land plan. However, mapping the distribution of abandoned land using a single type of remote sensing image is still challenging and problematic due to the fragmentation of such hilly areas and severe cloud pollution. In this study, a new approach by integrating Linear stretch (Ls), Maximum Value Composite (MVC), and Flexible Spatiotemporal DAta Fusion (FSDAF) was proposed to analyze the time-series changes and extract the spatial distribution of abandoned land. MOD09GA, MOD13Q1, and Sentinel-2 were selected as the basis of remote sensing images to fuse a monthly 10 m spatio-temporal data set. Three pieces of vegetation indices (VIs: ndvi, savi, ndwi) were utilized as the measures to identify the abandoned land. A multiple spatio-temporal scales sample database was established, and the Support Vector Machine (SVM) was used to extract abandoned land from cultivated land and woodland. The best extraction result with an overall accuracy of 88.1% was achieved by integrating Ls, MVC, and FSDAF, with the assistance of an SVM classifier. The fused VIs image set transcended the single source method (Sentinel-2) with greater accuracy by a margin of 10.8–23.6% for abandoned land extraction. On the other hand, VIs appeared to contribute positively to extract abandoned land from cultivated land and woodland. This study not only provides technical guidance for the quick acquirement of abandoned land distribution in hilly areas, but it also provides strong data support for the connection of targeted poverty alleviation to rural revitalization.

Analysis of The Change of Derelict Lands in Ignalina District Municipality in 2013–2019

Although the number of derelict and unused land in the country is declining every year, the problem of derelict land still remains. The reasons for the emergence of such land are various, usually the whole complex of circumstances that led to the abandonment of land in one area or another. Abandoned land is noticeable in both private and public land. The largest areas of derelict land are found in Vilnius district and north-eastern Lithuania. At the beginning of 2019, there were 4,783 abandoned land plots in Ignalina district. They occupied 2286,93 ha, which was 1.5 percent. district area. In the analyzed period of 2013–2019, the area of abandoned lands decreased by 1985.57 ha, i. y. 46 percent. After examining the reasons for the emergence of abandoned lands, it was established that they are complex – natural, economic, social, demographic, political, legal and human economic activities. The article examines land management measures that have influenced the reduction of brownfields - inspections of state control of land use, inspections of brownfields according to spatial data sets and application of RDP for afforestation on non-forest land. The maximum number of abandoned land inspections was determined during the state land control. There were 2239 inspections of derelict land, which is 79 percent. all land management measures applied. Keywords: land management, abandoned lands, Land Fund of the Republic of Lithuania, agricultural land, state control.

The Influence of Seasonality on the Multi-Spectral Image Segmentation for Identification of Abandoned Land

Areas of agricultural land in Lithuania have decreased from 2005 to 2021 by up to 2.4%. Agricultural lands that are no longer used for their main purpose are very likely to become abandoned and the emergence of such lands can cause a variety of social, economic, and environmental problems. Therefore, it is very important to constantly monitor changes of abandoned agricultural lands. The purpose of the research is to analyse the influence of seasonality on image segmentation for the identification of abandoned land areas. Multi-spectral Sentinel-2 images from different periods (April, July, and September) and three supervised image segmentation methods (Spectral Angle Mapping (SAM), Maximum_Likelihood (ML), and Minimum distance (MD)) were used with the same parameters in this research. Studies had found that the most appropriate time to segment abandoned lands was in September, according to the SAM and ML algorithms. During this period, the intensity of the green colour was the highest and the colour brightness of abandoned lands differed from the colour intensity of other lands.

Welfare State dalam Urgensi Land Banking di Indonesia

The high demand for housing has caused land prices to soar. This of course makes it difficult to build affordable housing for Low-Income Communities in urban areas. As a result, they will try to find a place to live as much as they can, such as by the river or railroad. Of course this is another problem in urban areas. Problems that can arise are flooding, environmental pollution, and the emergence of slum settlements. The alternative in solving this problem is the availability of land at an affordable price or with the Land Banking Principles to achieve community welfare. Based on the above background, the formulation of the problem can be described, namely how the Legal Characteristics of Land Banking and the application of Land Banking in Indonesia based on the Welfare State perspective. While the purpose of this research is of course to find and analyze the legal characteristics of Land Banking and to analyze and find the application of Land Banking in Indonesia from the perspective of Welfare State. This research is a normative juridical research or literature law research by examining existing literature, both primary and secondary legal materials, using a statutory and conceptual approach to later categorization and analysis.Land bank is a land policy where there is state authority either from the government itself or from an independent institution that has the authority to acquire, manage, regulate and distribute abandoned land for public purposes according to government programs. The concept of Land Banking, which is a land policy where there is state authority either from the government itself or from an independent institution that has the authority to acquire, manage, regulate and distribute abandoned land for public purposes according to government programs. This concept can be said to be a concept as an attempt by the government to fulfill its obligations in order to achieve the welfare of society by making a policy. The government made a Land Banking policy because land is an important element for the community as a place to live. Meanwhile, the residence itself can be said to be the primary need of the community. So that if the primary needs are achieved, the welfare of the community will also be achieved. Of course, in this case the organizer of the Land Banking concept is expected to be the government itself, so that later this concept will not be shifted from the original goal, namely for the welfare of the community. In addition, it is hoped that the policy can be made in written form so as to guarantee legal certainty.Keywords: Welfare State, Land Banking, Society

Standing of Mortgage Rights on Cultivation Rights That Have Been Determined as Deflanded Land in Solok District

Cultivation Right are rights to exploit land which is directly controlled by the state for agricultural, fishery or livestock companies for a period of time. One of the reasons for the removal of the cultivation right was because it was neglected. cultivation rights is one of the land rights that can be used as collateral for debt and encumbered with mortgage rights. The write-off of the mortgage rights because the write-off of land rights that are encumbered with a security right does not cause the guaranteed debt to be written off. In practice, the abolition of the cultivation right which is being subject to mortgage rights due to a decision to determine abandoned land creates confusion regarding the repayment of debts between the debtor (PT. Karatau Limo Sajati) and the creditor (PT. Bank Rakyat Indonesia Tbk.) And the difficulty of utilizing the former cultivation right object which is has been designated as abandoned land. The problems in this research are 1) how is the process of controlling cultivation right as an object of abandoned land in Solok Regency ? 2) what is the position of the mortgage rights above the cutivation rights which has been designated as abandoned land in Solok Regency ? 3) how is the utilization of the ex-cultivation rights land on which a mortgage has been imposed after it has been designated as abandoned land in Solok Regency ? The approach method used is juridical empirical, the nature of the research is descriptive analytical, the research data used is in the form of primary data, namely through interviews with sources and literature study to obtain secondary data. The data is processed systematically and analytically. The results showed that 1) the control process of PT. Karatau Limo Sajati as an abandoned land object which is carried out by means of inventory, identification and research, warnings, the proposal to determine abandoned land and the determination of abandoned land can actually be canceled through a lawsuit to the PTUN based on the weaknesses in the warning process. 2) the position of the mortgage over the cultivation rights which has been designated as abandoned land has been abolished, but the abolition of the mortgage because the termination of the land title does not cause the guaranteed debt to be canceled and subsequently the debtor's debt repayment is regulated in Articles 1131 and 1132 of the KUH Perdata. 3) The utilization of the ex-cultivation rights land on which a mortgage is imposed after it is designated as abandoned land is subject to a delay from BPN RI.